https://www.facebook.com/share/v/16Doqptn4E/
Putra height - Day before pipeline erupted
Putra height - Day before pipeline erupted
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Apr 2 2025, 08:27 AM, updated 9 months ago
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#1
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299 posts Joined: May 2020 |
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Apr 2 2025, 08:30 AM
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#2
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336 posts Joined: May 2013 |
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Apr 2 2025, 08:36 AM
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495 posts Joined: Apr 2019 |
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Apr 2 2025, 08:36 AM
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#4
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Apr 2 2025, 08:38 AM
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#5
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3,703 posts Joined: Oct 2005 |
QUOTE(machomama @ Apr 2 2025, 08:36 AM) Did.... did they just dig BETWEEEN the gas pipes to put the sewage pipes???? |
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Apr 2 2025, 08:38 AM
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#6
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495 posts Joined: Apr 2019 |
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Apr 2 2025, 08:39 AM
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#7
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Apr 2 2025, 08:41 AM
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#8
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162 posts Joined: Mar 2020 |
Bila tengok video ni. 1 yang aku terfikir... lepas tengok pulak tempat kejadian selepas kebakaran. Mana agaknya mesen2 dan pekerja2 ni. Adakah api terlalu panas sampai depa pun jadi abu? Ke diorang dah tau gas bocor jadi depa dah lari siap siap? ![]() gobiomani, netflix2019, and 3 others liked this post
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Apr 2 2025, 08:43 AM
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#9
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QUOTE(Medusakia @ Apr 2 2025, 08:41 AM) Bila tengok video ni. 1 yang aku terfikir... lepas tengok pulak tempat kejadian selepas kebakaran. Mana agaknya mesen2 dan pekerja2 ni. Adakah api terlalu panas sampai depa pun jadi abu? Ke diorang dah tau gas bocor jadi depa dah lari siap siap? Tengok video 30/3 malam, semua mesin dah xde kat sana![]() |
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Apr 2 2025, 08:44 AM
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#10
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12 posts Joined: Feb 2022 |
Let’s see what /k experts comment
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Apr 2 2025, 08:45 AM
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#11
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3,703 posts Joined: Oct 2005 |
QUOTE(dest9116 @ Apr 2 2025, 08:38 AM) Ground zero at left hand side they dig right hand side Possible. But still can't discard theory the digging could have contributed to fracturing the pipe somewhere due to pressure appliedInfront is the shoplot, is to the left Nampak macam developer not responsible wei max_cavalera liked this post
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Apr 2 2025, 08:48 AM
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#12
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752 posts Joined: Jun 2012 |
what a disaster ...
crazy aftermath picture like in warzone |
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Apr 2 2025, 08:50 AM
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1,618 posts Joined: Jun 2008 |
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Apr 2 2025, 08:51 AM
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1,595 posts Joined: Aug 2017 |
korek korek kaboom
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Apr 2 2025, 08:53 AM
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495 posts Joined: Apr 2019 |
QUOTE(ZeroSOFInfinity @ Apr 2 2025, 08:45 AM) Possible. But still can't discard theory the digging could have contributed to fracturing the pipe somewhere due to pressure applied Definitely hard to prove theoryAt most they kena fine for encroach or work without permit if no approval iandope liked this post
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Apr 2 2025, 08:56 AM
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12,287 posts Joined: Oct 2010 |
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Apr 2 2025, 08:56 AM
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#17
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3,703 posts Joined: Oct 2005 |
QUOTE(Medusakia @ Apr 2 2025, 08:41 AM) Bila tengok video ni. 1 yang aku terfikir... lepas tengok pulak tempat kejadian selepas kebakaran. Mana agaknya mesen2 dan pekerja2 ni. Adakah api terlalu panas sampai depa pun jadi abu? Ke diorang dah tau gas bocor jadi depa dah lari siap siap? ![]() QUOTE(dest9116 @ Apr 2 2025, 08:43 AM) Possible theory - 28 to 30 March (afternoon) digging to place the sewerage pipes. Could have fractured the gas pipe nearby due to pressure during digging.30 March (evening) - keep equipment because Raya on Monday (31 March). Car video at night showed nothing there. Between 30 March to 1 April - gas leaking, no worker detect or smell because not working. 1 April - pressure hit critical level, and boom. momojaja liked this post
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Apr 2 2025, 08:57 AM
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8,653 posts Joined: Sep 2005 From: lolyat |
QUOTE(ZeroSOFInfinity @ Apr 2 2025, 08:45 AM) Possible. But still can't discard theory the digging could have contributed to fracturing the pipe somewhere due to pressure applied gas pipe reserve land mana boleh conduct work, u need petronas gas approval or inspection during construction. Even LRT/MRT track surrounding also need Prasarana approval, this one confirm need. alfiejr and nightzstar liked this post
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Apr 2 2025, 09:01 AM
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#19
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3,703 posts Joined: Oct 2005 |
QUOTE(yhtan @ Apr 2 2025, 08:57 AM) gas pipe reserve land mana boleh conduct work, u need petronas gas approval or inspection during construction. You hire foreign workers who don't give a shit about safety..... they will do ANYTHING just to get the job done.Even LRT/MRT track surrounding also need Prasarana approval, this one confirm need. alfiejr, CallOfLegend, and 2 others liked this post
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Apr 2 2025, 09:01 AM
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#20
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1,045 posts Joined: Jan 2010 From: land beyond heaven and hell!! |
the comments section is more fun. paip bocor also can become tindas & ambil hak melayu story xCM, CallOfLegend, and 4 others liked this post
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Apr 2 2025, 09:02 AM
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12,287 posts Joined: Oct 2010 |
QUOTE(ZeroSOFInfinity @ Apr 2 2025, 08:56 AM) Possible theory - 28 to 30 March (afternoon) digging to place the sewerage pipes. Could have fractured the gas pipe nearby due to pressure during digging. For fire to start, you need heat, fuel and oxygen.30 March (evening) - keep equipment because Raya on Monday (31 March). Car video at night showed nothing there. Between 30 March to 1 April - gas leaking, no worker detect or smell because not working. 1 April - pressure hit critical level, and boom. Where did the heat come from? Smokers' cig? This post has been edited by prophetjul: Apr 2 2025, 09:02 AM |
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Apr 2 2025, 09:03 AM
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1,618 posts Joined: Jun 2008 |
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Apr 2 2025, 09:03 AM
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Apr 2 2025, 09:03 AM
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#24
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3,703 posts Joined: Oct 2005 |
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Apr 2 2025, 09:03 AM
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1,925 posts Joined: Feb 2016 |
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Apr 2 2025, 09:04 AM
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#26
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march4th liked this post
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Apr 2 2025, 09:10 AM
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#27
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216 posts Joined: Sep 2015 |
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Apr 2 2025, 09:11 AM
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38 posts Joined: Jun 2018 |
QUOTE(ZeroSOFInfinity @ Apr 2 2025, 08:56 AM) Possible theory - 28 to 30 March (afternoon) digging to place the sewerage pipes. Could have fractured the gas pipe nearby due to pressure during digging. If pipe fractured then how does the pressure increase? Wouldn't it be slowly leaking, which will result in a fire geyser probably, but not an explosion.30 March (evening) - keep equipment because Raya on Monday (31 March). Car video at night showed nothing there. Between 30 March to 1 April - gas leaking, no worker detect or smell because not working. 1 April - pressure hit critical level, and boom. |
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Apr 2 2025, 09:13 AM
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#29
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3,703 posts Joined: Oct 2005 |
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Apr 2 2025, 09:14 AM
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251 posts Joined: Aug 2024 |
QUOTE(dest9116 @ Apr 2 2025, 08:39 AM) those are RC drain culverts.Those are storm drains, not sewerage pipes. sewerage is usually 4" Clay pipe ![]() Based on this, it could be that they are upgrading/connecting monsoon drains for the new shoplots. Perhaps they dig one side no issue, got over confident with the other side. Either way, it is normal to dig next to services like TNB/Air Selangor/Gas pipe. However, precautions is required. cannot simply hentam SuperTuhan liked this post
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Apr 2 2025, 09:15 AM
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7,617 posts Joined: Mar 2009 |
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Apr 2 2025, 09:16 AM
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#32
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3,703 posts Joined: Oct 2005 |
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Apr 2 2025, 09:21 AM
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12,287 posts Joined: Oct 2010 |
QUOTE(kevintth @ Apr 2 2025, 09:03 AM) Then who approved this project in the first place? LOL. I really think this is the developer's problem—they should compensate all the victims. What project? The housing? The contractor who caused the explosion shoudl compensate.And yes, the housing is too near IMO. |
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Apr 2 2025, 09:22 AM
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109 posts Joined: Jun 2016 |
QUOTE(yhtan @ Apr 2 2025, 09:57 AM) gas pipe reserve land mana boleh conduct work, u need petronas gas approval or inspection during construction. can, but the work is going to be super tedious, need alot of pilot trenching (manual digging) along the suspected pipe ROW.Even LRT/MRT track surrounding also need Prasarana approval, this one confirm need. Even if they manage to safely exposed pipes, erosion can happen along the excavated slope which can add burden to the pipe, this is the thing happened to my project years back, high voltage cable snapped caused by soil pressure caused by erosion on the side, producing beautiful arc, luckily no one was nearby at the time. This post has been edited by Rorschach85: Apr 2 2025, 09:23 AM yhtan liked this post
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Apr 2 2025, 09:24 AM
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5 posts Joined: Jun 2018 |
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Apr 2 2025, 09:25 AM
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257 posts Joined: Dec 2011 |
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Apr 2 2025, 09:26 AM
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#37
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500 posts Joined: Dec 2019 |
QUOTE(bereev @ Apr 2 2025, 09:25 AM) cuti raya, excavator balik kelate smallcrab liked this post
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Apr 2 2025, 09:27 AM
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336 posts Joined: May 2013 |
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Apr 2 2025, 09:28 AM
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1,176 posts Joined: May 2006 From: Memesia |
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Apr 2 2025, 09:31 AM
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487 posts Joined: May 2005 From: KL |
all the gas and construction expert come out already
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Apr 2 2025, 09:32 AM
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#41
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911 posts Joined: Jun 2005 |
remember the last sohai contractor dig near the LRT pier then the pier GG, which cause the line to be interrupted for 1 year plus
sohai contractor need to be educated |
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Apr 2 2025, 09:34 AM
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#42
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172 posts Joined: Oct 2007 |
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Apr 2 2025, 09:36 AM
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156 posts Joined: Mar 2022 |
scary shit, i always take this shortcut to my favourite ikan bakar place
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Apr 2 2025, 09:36 AM
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395 posts Joined: Dec 2017 |
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Apr 2 2025, 09:40 AM
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#45
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67 posts Joined: Nov 2020 |
QUOTE(Medusakia @ Apr 2 2025, 08:41 AM) Bila tengok video ni. 1 yang aku terfikir... lepas tengok pulak tempat kejadian selepas kebakaran. Mana agaknya mesen2 dan pekerja2 ni. Adakah api terlalu panas sampai depa pun jadi abu? Ke diorang dah tau gas bocor jadi depa dah lari siap siap? BLEVE EXPLOSION.![]() contractor dah luka kan pipe pastu lari, it may causes the gas to leak already and with just a spark, explosion will happen. |
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Apr 2 2025, 09:41 AM
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0 posts Joined: Nov 2021 |
QUOTE(dest9116 @ Apr 2 2025, 08:38 AM) Ground zero at left hand side they dig right hand side Not as simple as that. Its probably a rigid straight line carbon steel pipeline coated with other linings. So the weak point will not be exactly on the pressure applied side. It can be nearby pipe joints which is typically the weak part of the connection. Infront is the shoplot, is to the left Nampak macam developer not responsible wei Basically u move pipe 100 meter away pun the whole pipe section can move. If its water pipe then its ok for small leak at the joints. But gas pipeline is a big no no. |
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Apr 2 2025, 09:42 AM
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356 posts Joined: May 2022 |
QUOTE(Iconia18 @ Apr 2 2025, 09:41 AM) Not as simple as that. Its probably a rigid straight line carbon steel pipeline coated with other linings. So the weak point will not be exactly on the pressure applied side. It can be nearby pipe joints which is typically the weak part of the connection. So means now entire piping need to investigate for any damages ?Basically u move pipe 100 meter away pun the whole pipe section can move. If its water pipe then its ok for small leak at the joints. But gas pipeline is a big no no. |
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Apr 2 2025, 09:42 AM
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#48
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911 posts Joined: Jun 2005 |
QUOTE(iandope @ Apr 2 2025, 09:40 AM) BLEVE EXPLOSION. yes, people don't realize gas vapor explosion need a ignition source before it can go offcontractor dah luka kan pipe pastu lari, it may causes the gas to leak already and with just a spark, explosion will happen. so contractor must realize they have hit the jackpot before cabut in hurry now most likely already in thailand chilling |
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Apr 2 2025, 09:44 AM
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42 posts Joined: Feb 2010 |
How deep the gas line is ?
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Apr 2 2025, 09:45 AM
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#50
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3,703 posts Joined: Oct 2005 |
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Apr 2 2025, 09:47 AM
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1,337 posts Joined: Apr 2011 |
still dont understand why got a gas pipeline
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Apr 2 2025, 09:50 AM
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0 posts Joined: Nov 2021 |
QUOTE(RT8081 @ Apr 2 2025, 09:42 AM) It gonna be by sections. Cannot be in in situ only. Actually i work in iraq last 3 years involve in building gas lines to power plant. Gas line is no joke. So much thoughts on all the potential weak points on how to protect against civil work and militants activity etc. But in the end we know that we cant protect everything. Everyone nearby need to be responsible and educated on how to approach nearby lines area. The funny thing is even in our project the council only approve 1.5 km at least from gas lines pagar for any road works or civil works. momojaja, SuperTuhan, and 2 others liked this post
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Apr 2 2025, 09:54 AM
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479 posts Joined: May 2010 |
QUOTE(popice2u @ Apr 2 2025, 09:47 AM) How do you think our power stations are run?Even refineries with their own power generation units imports natural gas, and it is via pipelines it is delivered. Do u think gas trucks have the ability to sustain a power plant? |
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Apr 2 2025, 09:54 AM
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#54
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911 posts Joined: Jun 2005 |
QUOTE(Iconia18 @ Apr 2 2025, 09:50 AM) It gonna be by sections. Cannot be in in situ only. but this one the excavation is done within 100 meter of gas line lehActually i work in iraq last 3 years involve in building gas lines to power plant. Gas line is no joke. So much thoughts on all the potential weak points on how to protect against civil work and militants activity etc. But in the end we know that we cant protect everything. Everyone nearby need to be responsible and educated on how to approach nearby lines area. The funny thing is even in our project the council only approve 1.5 km at least from gas lines pagar for any road works or civil works. |
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Apr 2 2025, 10:01 AM
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356 posts Joined: May 2022 |
QUOTE(Iconia18 @ Apr 2 2025, 09:50 AM) It gonna be by sections. Cannot be in in situ only. Thanks bro for sharing. Yeah, Gas line is something no one should play with.Actually i work in iraq last 3 years involve in building gas lines to power plant. Gas line is no joke. So much thoughts on all the potential weak points on how to protect against civil work and militants activity etc. But in the end we know that we cant protect everything. Everyone nearby need to be responsible and educated on how to approach nearby lines area. The funny thing is even in our project the council only approve 1.5 km at least from gas lines pagar for any road works or civil works. I was in kerteh in 1998 and found out that the entire township is sitting on a gas pipe. Someone back then mentioned that if something bad happen to the pipes, the whole township and nearby area will be wiped out |
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Apr 2 2025, 10:01 AM
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251 posts Joined: Aug 2024 |
QUOTE(RT8081 @ Apr 2 2025, 09:42 AM) partly of annual inspection anyway.DOSH related items all have to check for wall thickness annually. RT8081 liked this post
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Apr 2 2025, 10:03 AM
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356 posts Joined: May 2022 |
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Apr 2 2025, 10:03 AM
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251 posts Joined: Aug 2024 |
QUOTE(Skidd Chung @ Apr 2 2025, 09:54 AM) How do you think our power stations are run? wait till he fins out got 220v cable underneath his car porch Even refineries with their own power generation units imports natural gas, and it is via pipelines it is delivered. Do u think gas trucks have the ability to sustain a power plant? march4th and Skidd Chung liked this post
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Apr 2 2025, 10:03 AM
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#59
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911 posts Joined: Jun 2005 |
QUOTE(popice2u @ Apr 2 2025, 09:47 AM) because gas pipeline was there before they decide it is good idea to put a taman there march4th liked this post
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Apr 2 2025, 10:04 AM
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QUOTE(desmond2020 @ Apr 2 2025, 09:54 AM) In this case majlis damn crazy approving whole residential section within couple of meters from main gas distribution line.Normally the concern is either gas explosion or h2s contamination. Normally natural gas contains some h2s depending on scavenging efficiency at processing plant. Even small leak with less than 10 ppm h2s can kill people without any explosion. |
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Apr 2 2025, 10:04 AM
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#61
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911 posts Joined: Jun 2005 |
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Apr 2 2025, 10:05 AM
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1,103 posts Joined: Nov 2009 |
QUOTE(ZeroSOFInfinity @ Apr 2 2025, 08:56 AM) Possible theory - 28 to 30 March (afternoon) digging to place the sewerage pipes. Could have fractured the gas pipe nearby due to pressure during digging. Yup, i think the weather sun that day also very hot and trigger the pressure ignition30 March (evening) - keep equipment because Raya on Monday (31 March). Car video at night showed nothing there. Between 30 March to 1 April - gas leaking, no worker detect or smell because not working. 1 April - pressure hit critical level, and boom. |
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Apr 2 2025, 10:05 AM
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251 posts Joined: Aug 2024 |
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Apr 2 2025, 10:06 AM
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257 posts Joined: Dec 2011 |
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Apr 2 2025, 10:06 AM
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#65
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911 posts Joined: Jun 2005 |
QUOTE(Iconia18 @ Apr 2 2025, 10:04 AM) In this case majlis damn crazy approving whole residential section within couple of meters from main gas distribution line. this pipeline carry the processed gas, so H2S isn't a concern I thinkNormally the concern is either gas explosion or h2s contamination. Normally natural gas contains some h2s depending on scavenging efficiency at processing plant. Even small leak with less than 10 ppm h2s can kill people without any explosion. unless there is line carrying raw gas from production platform then there is risk of H2S but anyhow, majlis is still damn sohai kebal bodo for approving this Jv8888 liked this post
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Apr 2 2025, 10:08 AM
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All Stars
17,025 posts Joined: Jan 2005 |
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Apr 2 2025, 10:08 AM
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479 posts Joined: May 2010 |
QUOTE(iandope @ Apr 2 2025, 09:40 AM) BLEVE EXPLOSION. This is not BLEVE which is Boiling Liquid Expansion Vapor Explosion.contractor dah luka kan pipe pastu lari, it may causes the gas to leak already and with just a spark, explosion will happen. BLEVE is only for liquid containers that is heated to a point that the vapors contained within suddenly expands outwards when the containement failed and the expanded vapor ignited. Something like your tong gas which is liquidfied gas, you put fire outside until the heated tong vaporised all the liquid inside, causing high pressure. Then the tong cracked under intense heat and pressure, the resulting vapor released is what is called a BLEVE. This is a pressurised gas line rupture, and the gas ignited. There was no fire before the rupture, else we can see smoke everywhere before the explosion. Based on the still standing building beside the site of release that is not black in color, there was no large release of gas before ignition, or else everything around it will be caught in the explosion and either burned or shatter. Thus I will conclude it is a pipe rupture, gas sudden released and subsequent ignition of the fuel/air rich mixture. Thus is my amateur conclusion. This post has been edited by Skidd Chung: Apr 2 2025, 10:11 AM |
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Apr 2 2025, 10:12 AM
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82 posts Joined: May 2013 |
i wonder how they can give approval or get approval building so close to the gas line...what's the actual guideline, limit distance from the gas line to build.
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Apr 2 2025, 10:13 AM
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#69
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79 posts Joined: Jul 2013 |
Prob trying to install pipe to siphon some of the gas for $
If no leak nobody know |
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Apr 2 2025, 10:27 AM
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17 posts Joined: Jan 2014 |
Ppl say contractor rapture the pipe then lari. I not sure this theory make sense or not la... It is pressurized pipe and i dont think nowadays there is no sensor to detect pressure leaking la... You are telling me contractor bocor the pipe on 30 march then lari and explosion on 1 april and gas company unable to detect pipe leaking pressure? If ini macam then whole malaysia punya gas pipe ma very jialat lo no early leaking detection?
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Apr 2 2025, 10:29 AM
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479 posts Joined: May 2010 |
QUOTE(ZeroSOFInfinity @ Apr 2 2025, 08:56 AM) Possible theory - 28 to 30 March (afternoon) digging to place the sewerage pipes. Could have fractured the gas pipe nearby due to pressure during digging. I want to debunk this theory a bit.30 March (evening) - keep equipment because Raya on Monday (31 March). Car video at night showed nothing there. Between 30 March to 1 April - gas leaking, no worker detect or smell because not working. 1 April - pressure hit critical level, and boom. Steel does not fracture easily. Altough the works might cause the pipe to be damaged, leaks happen at point of impact, not 100m away. You dont knock a pipe at point A and it leaks at point C 100m away. If gas is leaking and covered a large area before igniting, the resulting explosion should have destroyed the buildings beside it. I'm not sure how badly destroyed the shophouses beside is, but i would assume if it was caught in a fiery explosion, it would be burned badly. Regarding pressure hitting critical, what pressure? The only pressure is in the pipes, once it leaks out to atmosphere, there is only atmospheric pressure. A pipe failure/rupture can be due to a integrity issues like corrosion or cracks due to errosion or worse case scenario, an impact. jojolicia liked this post
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Apr 2 2025, 10:31 AM
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i lol'd when i saw 'expert' claim is BLEVE
anyone from O&G knows its not i'd put it as VCE without knowing the details.. but definitely not BLEVE |
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Apr 2 2025, 10:31 AM
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Apr 2 2025, 10:34 AM
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QUOTE(FreedomSeeker @ Apr 2 2025, 10:27 AM) Ppl say contractor rapture the pipe then lari. I not sure this theory make sense or not la... It is pressurized pipe and i dont think nowadays there is no sensor to detect pressure leaking la... You are telling me contractor bocor the pipe on 30 march then lari and explosion on 1 april and gas company unable to detect pipe leaking pressure? If ini macam then whole malaysia punya gas pipe ma very jialat lo no early leaking detection? Small leaks are hard to detect. Especially for high capacity, high pressure gas. The leak rate can be discounted as an error of calibration. 100t/h flowrate at 50barg, you won't notice 50kg/h leaks. |
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Apr 2 2025, 10:36 AM
Show posts by this member only | IPv6 | Post
#75
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911 posts Joined: Jun 2005 |
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Apr 2 2025, 10:36 AM
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QUOTE(Rorschach85 @ Apr 2 2025, 09:22 AM) can, but the work is going to be super tedious, need alot of pilot trenching (manual digging) along the suspected pipe ROW. problem is this case the digging did by some small time contractor with little knowledge workingEven if they manage to safely exposed pipes, erosion can happen along the excavated slope which can add burden to the pipe, this is the thing happened to my project years back, high voltage cable snapped caused by soil pressure caused by erosion on the side, producing beautiful arc, luckily no one was nearby at the time. on high risk area, their method of digging must like when your excavator bucket hit something, that's the max point of the digging |
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Apr 2 2025, 10:37 AM
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QUOTE(Skidd Chung @ Apr 2 2025, 10:08 AM) This is not BLEVE which is Boiling Liquid Expansion Vapor Explosion. Fully agree with your BLEVE theory. You need a surrounding fire to cause BLEVE too. There was no report of a fire prior to the main fire, and that was a live pipeline which means rupture from overpressuing was unlikely as there must be an alarm and relief system for the line. BLEVE is only for liquid containers that is heated to a point that the vapors contained within suddenly expands outwards when the containement failed and the expanded vapor ignited. Something like your tong gas which is liquidfied gas, you put fire outside until the heated tong vaporised all the liquid inside, causing high pressure. Then the tong cracked under intense heat and pressure, the resulting vapor released is what is called a BLEVE. This is a pressurised gas line rupture, and the gas ignited. There was no fire before the rupture, else we can see smoke everywhere before the explosion. Based on the still standing building beside the site of release that is not black in color, there was no large release of gas before ignition, or else everything around it will be caught in the explosion and either burned or shatter. Thus I will conclude it is a pipe rupture, gas sudden released and subsequent ignition of the fuel/air rich mixture. Thus is my amateur conclusion. I'm scratching my head looking for the source of ignition. NG has very high auto ignition temperature way above the temperature at which NG is stored or transported in the pipeline. Maybe the invisible gas cloud had travelled outside of the leaking point and caught a source of ignition. |
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Apr 2 2025, 10:37 AM
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#78
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1,902 posts Joined: Sep 2012 |
QUOTE(Medusakia @ Apr 2 2025, 08:41 AM) Bila tengok video ni. 1 yang aku terfikir... lepas tengok pulak tempat kejadian selepas kebakaran. Mana agaknya mesen2 dan pekerja2 ni. Adakah api terlalu panas sampai depa pun jadi abu? Ke diorang dah tau gas bocor jadi depa dah lari siap siap? Good theory![]() let's ask Grok |
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Apr 2 2025, 10:38 AM
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Apr 2 2025, 10:40 AM
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#80
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QUOTE(mushigen @ Apr 2 2025, 10:37 AM) Fully agree with your BLEVE theory. You need a surrounding fire to cause BLEVE too. There was no report of a fire prior to the main fire, and that was a live pipeline which means rupture from overpressuing was unlikely as there must be an alarm and relief system for the line. even it is pipe rupture, you still need an ignition source. natural gas don't auto ignite at ambient temperature I'm scratching my head looking for the source of ignition. NG has very high auto ignition temperature way above the temperature at which NG is stored or transported in the pipeline. Maybe the invisible gas cloud had travelled outside of the leaking point and caught a source of ignition. so it is a vapor cloud explosion, the nearby house should be the ignition source. |
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Apr 2 2025, 10:43 AM
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QUOTE(Iconia18 @ Apr 2 2025, 09:41 AM) Not as simple as that. Its probably a rigid straight line carbon steel pipeline coated with other linings. So the weak point will not be exactly on the pressure applied side. It can be nearby pipe joints which is typically the weak part of the connection. saw some drone image, the gas pipeline is actually sticking out of the ground where the crater isBasically u move pipe 100 meter away pun the whole pipe section can move. If its water pipe then its ok for small leak at the joints. But gas pipeline is a big no no. somehow the pipe just snap in half ![]() ![]() |
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Apr 2 2025, 10:44 AM
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QUOTE(pinamorita @ Apr 2 2025, 10:36 AM) problem is this case the digging did by some small time contractor with little knowledge working A long fully operational pipeline is very heavy and need structural supports along the way. on high risk area, their method of digging must like when your excavator bucket hit something, that's the max point of the digging Not referring to this pipeline in particular, but if a support is disturbed or shifted due to soil movement (tremors ke, soil erosion ke) or a pipe itself kena mechanical shocks, it places big mechanical stress on the piping, and the weakest point, especially welded joints might give way. My 2 sen opinion jer. march4th and pinamorita liked this post
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Apr 2 2025, 10:47 AM
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QUOTE(desmond2020 @ Apr 2 2025, 10:06 AM) this pipeline carry the processed gas, so H2S isn't a concern I think Sometimes it depends on sale spec. Because its hard to reduce h2s until below 5 ppm. For utilization by industry the small h2s will just burn into sulfur dioxide a anyway. So they can accept that.unless there is line carrying raw gas from production platform then there is risk of H2S but anyhow, majlis is still damn sohai kebal bodo for approving this But still like you said. Its questionable approving residential area within couple of meters from gas line. I even saw road already built crossing the line? If that is true thats even more irresponsible. |
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Apr 2 2025, 10:50 AM
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QUOTE(desmond2020 @ Apr 2 2025, 10:40 AM) even it is pipe rupture, you still need an ignition source. natural gas don't auto ignite at ambient temperature It's always vapour cloud that ignites. You throw a lighted match in a bucket of diesel and the match probably just dies off. Heat up the diesel to generate enough fumesand it may be a different story. so it is a vapor cloud explosion, the nearby house should be the ignition source. I've mentioned about its high auto ignition temperature and the need for an ignition source. My theory is the leaks cause gas to acculumate, and the gas travelled until it caught a source of ignition. In a housing estate, there aren't many intrinsically safe devices being used, so it can easily find a source of ignition. A TNB meter? Anything. |
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Apr 2 2025, 10:52 AM
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QUOTE(Medusakia @ Apr 2 2025, 08:41 AM) Bila tengok video ni. 1 yang aku terfikir... lepas tengok pulak tempat kejadian selepas kebakaran. Mana agaknya mesen2 dan pekerja2 ni. Adakah api terlalu panas sampai depa pun jadi abu? Ke diorang dah tau gas bocor jadi depa dah lari siap siap? Wtf is Omen Necrofis![]() |
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Apr 2 2025, 10:52 AM
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#86
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911 posts Joined: Jun 2005 |
QUOTE(mushigen @ Apr 2 2025, 10:50 AM) It's always vapour cloud that ignites. You throw a lighted match in a bucket of diesel and the match probably just dies off. Heat up the diesel to generate enough fumesand it may be a different story. a burning incense, a hot engine surface and etcI've mentioned about its high auto ignition temperature and the need for an ignition source. My theory is the leaks cause gas to acculumate, and the gas travelled until it caught a source of ignition. In a housing estate, there aren't many intrinsically safe devices being used, so it can easily find a source of ignition. A TNB meter? Anything. thousand of potential spark point in a residential area. |
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Apr 2 2025, 10:54 AM
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Apr 2 2025, 10:55 AM
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#88
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74 posts Joined: Aug 2014 |
Do we know already which company that fuck up and who gave them permission? Kamon /k. JonSpark liked this post
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Apr 2 2025, 10:56 AM
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592 posts Joined: Oct 2018 |
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Apr 2 2025, 10:56 AM
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QUOTE(desmond2020 @ Apr 2 2025, 10:36 AM) usually gas company will put additive, ayam forget the name, but it smell really terrible so that people will notice the leak If you are talking about smell detection, yeah sure you can 'detect' a leak if you are there or the wind blows your direction, the concentration is sufficient, etc. So you can report it to authorities (BOMBA).But the operators monitoring the pipe flows will not detect the 'neglegible' leaks. It is 'accepted' there will be leaks, whether it is 'harmless' or not, etc before a decision is made to shut the pipes down for maintenance. |
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Apr 2 2025, 10:57 AM
Show posts by this member only | IPv6 | Post
#91
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911 posts Joined: Jun 2005 |
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Apr 2 2025, 11:01 AM
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QUOTE(Skidd Chung @ Apr 2 2025, 10:34 AM) Small leaks are hard to detect. Especially for high capacity, high pressure gas. I dono la... If even you can come out thing like that then i dont think a million or billion dollar industry wont just dont care about it and never find a solution for this. Gas pipe line is not new also and it is not something that can be taken lightly for its safety. Even a small leakage can cause explosion and fatality. I pretty sure these industries know how important to detect early leakage big or small. The leak rate can be discounted as an error of calibration. 100t/h flowrate at 50barg, you won't notice 50kg/h leaks. Korek then leak then boom terus this 1 i can understand la... korek then leak then boom 1 or 2 days later really susah to make sense. But still i can't say i am right also la... Better wait report out see la... |
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Apr 2 2025, 11:03 AM
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QUOTE(desmond2020 @ Apr 2 2025, 10:40 AM) even it is pipe rupture, you still need an ignition source. natural gas don't auto ignite at ambient temperature back hoe operated korek korek while smoking cigarette lo.....so it is a vapor cloud explosion, the nearby house should be the ignition source. typical construction site behaviour, brought into oil and gas environment |
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Apr 2 2025, 11:05 AM
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1,035 posts Joined: Feb 2007 |
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Apr 2 2025, 11:05 AM
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#95
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911 posts Joined: Jun 2005 |
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Apr 2 2025, 11:07 AM
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Apr 2 2025, 11:07 AM
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479 posts Joined: May 2010 |
QUOTE(Raddus @ Apr 2 2025, 10:43 AM) saw some drone image, the gas pipeline is actually sticking out of the ground where the crater is Interesting pic, but we dont know if that is the gas pipe or some other pipe beside the gas pipe. There might be more than 1 pipe running the same route. somehow the pipe just snap in half ![]() ![]() For now, we can speculate but can't be sure until more details are out. |
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Apr 2 2025, 11:08 AM
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Apr 2 2025, 11:08 AM
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QUOTE(Iconia18 @ Apr 2 2025, 10:47 AM) Sometimes it depends on sale spec. Because its hard to reduce h2s until below 5 ppm. For utilization by industry the small h2s will just burn into sulfur dioxide a anyway. So they can accept that. There are many residential neighbourhoods built like this.But still like you said. Its questionable approving residential area within couple of meters from gas line. I even saw road already built crossing the line? If that is true thats even more irresponsible. All the way from Subang to Kota Kemuning to Klang. Heck, I can even tell you how these lines cross the road in some places. Heck, there's one underneath Kesas itself. Heck, how do you think it is tapped into factories for consumption? It is not questionable for this practice, it is the practical way. Got exclusion zone already. Exclusion zone is taken cared of. no trees no big roots etc. no piling inside. |
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Apr 2 2025, 11:09 AM
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Apr 2 2025, 11:11 AM
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#101
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911 posts Joined: Jun 2005 |
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Apr 2 2025, 11:12 AM
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Apr 2 2025, 11:12 AM
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QUOTE(Skidd Chung @ Apr 2 2025, 10:56 AM) If you are talking about smell detection, yeah sure you can 'detect' a leak if you are there or the wind blows your direction, the concentration is sufficient, etc. So you can report it to authorities (BOMBA). If the leak is downstream of flow meter, the flow won't change. If big leak, flow may even increase and the control valve will act to compensate. But the operators monitoring the pipe flows will not detect the 'neglegible' leaks. It is 'accepted' there will be leaks, whether it is 'harmless' or not, etc before a decision is made to shut the pipes down for maintenance. If leak is upstream of flow meter, reading may momentarily drop but may be compensated by control valves movement. Skidd Chung liked this post
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Apr 2 2025, 11:18 AM
Show posts by this member only | IPv6 | Post
#104
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That road crossing over the pipeline with backhoe moving back and fro , sure will cause stress to the underground pipe
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Apr 2 2025, 11:33 AM
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479 posts Joined: May 2010 |
QUOTE(FreedomSeeker @ Apr 2 2025, 11:01 AM) I dono la... If even you can come out thing like that then i dont think a million or billion dollar industry wont just dont care about it and never find a solution for this. Gas pipe line is not new also and it is not something that can be taken lightly for its safety. Even a small leakage can cause explosion and fatality. I pretty sure these industries know how important to detect early leakage big or small. You just answered your own question. It is a BILLION dollar industry. You don't shut down a billion dollar operation for every single little leak you find. Gas pipes powers the nation, if you shut down power supply for 1 week for every leak you find, you wont have power for the whole year. Korek then leak then boom terus this 1 i can understand la... korek then leak then boom 1 or 2 days later really susah to make sense. But still i can't say i am right also la... Better wait report out see la... Of course in an ideal world, all the pipes installed are perfectly manufactured, by competent workers, and it is perfectly checked by quality control and perfectly installed by highest paid workers with highest standard of safety and competence. I'm telling you, it is not. Gas pipelines are not new, it is used because it works. It isnt perfect or maybe perfect pipes are just too expensive to install. Whatever the reason is, the industry can only pray their pipes don't rupture due to unforeseen circumstances. And will only replace pipes that are known to have their integrity suspect. |
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Apr 2 2025, 11:37 AM
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QUOTE(Porkycorgi5588 @ Apr 2 2025, 11:08 AM) There are many residential neighbourhoods built like this. Practical within safe margin its ok. But i worked in oil and gas industry so if its up to me no way i will allow road above two meter buried main gas line. If its for single phase dead oil line or water injection/production line then its ok..All the way from Subang to Kota Kemuning to Klang. Heck, I can even tell you how these lines cross the road in some places. Heck, there's one underneath Kesas itself. Heck, how do you think it is tapped into factories for consumption? It is not questionable for this practice, it is the practical way. Got exclusion zone already. Exclusion zone is taken cared of. no trees no big roots etc. no piling inside. In iraq we even relocate houses within certain distance if we want to build new gas lines. In this case the way i read it gas line came first. So its responsibility of pbt not to allow residential within certain distance from the area. |
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Apr 2 2025, 11:38 AM
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#107
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QUOTE(Skidd Chung @ Apr 2 2025, 11:33 AM) You just answered your own question. It is a BILLION dollar industry. You don't shut down a billion dollar operation for every single little leak you find. Gas pipes powers the nation, if you shut down power supply for 1 week for every leak you find, you wont have power for the whole year. What ur profession? U in O&G Industry? Not mocking ya… just asking. If u are expert in this field then yeah i can share your explanation.Of course in an ideal world, all the pipes installed are perfectly manufactured, by competent workers, and it is perfectly checked by quality control and perfectly installed by highest paid workers with highest standard of safety and competence. I'm telling you, it is not. Gas pipelines are not new, it is used because it works. It isnt perfect or maybe perfect pipes are just too expensive to install. Whatever the reason is, the industry can only pray their pipes don't rupture due to unforeseen circumstances. And will only replace pipes that are known to have their integrity suspect. This post has been edited by FreedomSeeker: Apr 2 2025, 11:40 AM |
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Apr 2 2025, 11:44 AM
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QUOTE(mushigen @ Apr 2 2025, 11:12 AM) If the leak is downstream of flow meter, the flow won't change. If big leak, flow may even increase and the control valve will act to compensate. Yes, this is true.If leak is upstream of flow meter, reading may momentarily drop but may be compensated by control valves movement. However normally supplier and client have their own flowmeters, and also designated flow for each client. So for instance in this case, client will experience sudden drop in pressure and flow, will attempt to compensate and will probably call the supplier to ask wtf going on. Supplier will experience a sudden high flow and drop in pressure. Their own controls will compensate and reduce the flow and to build up pressure. They will check if any client is pulling too much. At this point, if the bomba havent called them yet, they would have to quickly deduce that they might have a pipe burst somewhere and shut their valves and follow their emergency procedure. However, this is only for large leaks relative to the normal flows. If they are only supplying 100kg/h, even a 10kg/h leak is considered big. If the suppliers are pushing 100t/h flows, 50kg/h leaks might not be noticeable and will be compensated by AUTO controls. |
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Apr 2 2025, 11:49 AM
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4,955 posts Joined: Jul 2010 |
QUOTE(Skidd Chung @ Apr 2 2025, 11:44 AM) Yes, this is true. Yup, 50kg per hour loss is usually not detectable by operator.However normally supplier and client have their own flowmeters, and also designated flow for each client. So for instance in this case, client will experience sudden drop in pressure and flow, will attempt to compensate and will probably call the supplier to ask wtf going on. Supplier will experience a sudden high flow and drop in pressure. Their own controls will compensate and reduce the flow and to build up pressure. They will check if any client is pulling too much. At this point, if the bomba havent called them yet, they would have to quickly deduce that they might have a pipe burst somewhere and shut their valves and follow their emergency procedure. However, this is only for large leaks relative to the normal flows. If they are only supplying 100kg/h, even a 10kg/h leak is considered big. If the suppliers are pushing 100t/h flows, 50kg/h leaks might not be noticeable and will be compensated by AUTO controls. |
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Apr 2 2025, 11:51 AM
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#110
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167 posts Joined: Jan 2010 |
Ini salah dap
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Apr 2 2025, 11:55 AM
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4,955 posts Joined: Jul 2010 |
QUOTE(FreedomSeeker @ Apr 2 2025, 11:01 AM) I dono la... If even you can come out thing like that then i dont think a million or billion dollar industry wont just dont care about it and never find a solution for this. Gas pipe line is not new also and it is not something that can be taken lightly for its safety. Even a small leakage can cause explosion and fatality. I pretty sure these industries know how important to detect early leakage big or small. Korek then boom days later is not something unusual. If a pipeline suffers cracks, they can get worse over time due to pressure and vibration from the flow. Korek then leak then boom terus this 1 i can understand la... korek then leak then boom 1 or 2 days later really susah to make sense. But still i can't say i am right also la... Better wait report out see la... Meanwhile, hydrocarbons leak out and accumulate. If it's LPG, it should explode earlier as LPG is heavier than air and will accumulate at low points (harder for wind to disperse). If gas, may take a while as it's lighter and doesn't accumulate as easily as lpg. All it needs is to reach above lower explosive limit and a source of ignition. |
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Apr 2 2025, 11:58 AM
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Apr 2 2025, 12:01 PM
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#113
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717 posts Joined: Nov 2012 |
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Apr 2 2025, 12:03 PM
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QUOTE(FreedomSeeker @ Apr 2 2025, 11:38 AM) What ur profession? U in O&G Industry? Not mocking ya… just asking. If u are expert in this field then yeah i can share your explanation. In the industry, but not an expert. Just average joe. My opinions are based on my experience, not 'expertise'. FreedomSeeker liked this post
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Apr 2 2025, 12:08 PM
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204 posts Joined: Aug 2011 |
gas leak do not play play , you cannot stand also 1km with gas burn if it happen again trust me, again this is serious issue national issue, imagine another gas burst or multiple like domino happen aa it gas, gas not like oil , thats reason malaysia use gas pipeline for fuel up our power station to generare us as modern country.
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Apr 2 2025, 12:20 PM
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14 posts Joined: Oct 2014 From: Bandar Damai dan Indah |
Palatao
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Apr 2 2025, 12:26 PM
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QUOTE(Iconia18 @ Apr 2 2025, 11:37 AM) Practical within safe margin its ok. But i worked in oil and gas industry so if its up to me no way i will allow road above two meter buried main gas line. If its for single phase dead oil line or water injection/production line then its ok.. Look at usj 3 entire stretch is all right next to the pipelineIn iraq we even relocate houses within certain distance if we want to build new gas lines. In this case the way i read it gas line came first. So its responsibility of pbt not to allow residential within certain distance from the area. |
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Apr 2 2025, 12:36 PM
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#118
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717 posts Joined: Nov 2012 |
QUOTE(FreedomSeeker @ Apr 2 2025, 10:27 AM) Ppl say contractor rapture the pipe then lari. I not sure this theory make sense or not la... It is pressurized pipe and i dont think nowadays there is no sensor to detect pressure leaking la... You are telling me contractor bocor the pipe on 30 march then lari and explosion on 1 april and gas company unable to detect pipe leaking pressure? If ini macam then whole malaysia punya gas pipe ma very jialat lo no early leaking detection? Saw comment in FB, one of the residents there called up Petronas to report. The call center said nothing was shown up on thier screen. Let me if can find back the post |
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Apr 2 2025, 12:39 PM
Show posts by this member only | IPv6 | Post
#119
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717 posts Joined: Nov 2012 |
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Apr 2 2025, 12:41 PM
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1,026 posts Joined: Jul 2011 |
Gila mia developer, Main2 sama itu gas pipe
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Apr 2 2025, 12:42 PM
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#121
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Firstly, I know absolutely nothing about gas pipes & engineering. But I just needed to visualise the situation based on what some members on this post was saying. Is this what happened? ![]() march4th, bansheelipsx, and 1 other liked this post
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Apr 2 2025, 12:42 PM
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QUOTE(omron @ Apr 2 2025, 12:08 PM) gas leak do not play play , you cannot stand also 1km with gas burn if it happen again trust me, again this is serious issue national issue, imagine another gas burst or multiple like domino happen aa it gas, gas not like oil , thats reason malaysia use gas pipeline for fuel up our power station to generare us as modern country. I notice in several areas in USJ and Putra Heights the distance of the houses from the centre line of the pipeline is something like 30 to 100 metres. |
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Apr 2 2025, 12:52 PM
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#123
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Apr 2 2025, 12:53 PM
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#124
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958 posts Joined: Aug 2007 From: forum.lowyat.net |
So during public holiday also they busy digging?
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Apr 2 2025, 12:59 PM
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Unsurprisingly, now /ktards think they are pipe experts.
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Apr 2 2025, 01:02 PM
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#126
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Apr 2 2025, 01:13 PM
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Junior Member
251 posts Joined: Aug 2024 |
QUOTE(Clubtoska @ Apr 2 2025, 12:42 PM) Firstly, I know absolutely nothing about gas pipes & engineering. But I just needed to visualise the situation based on what some members on this post was saying. Is this what happened? bawah still keras.![]() how to lead to your scenario la? ![]() Clubtoska liked this post
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Apr 2 2025, 01:15 PM
Show posts by this member only | IPv6 | Post
#128
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Junior Member
239 posts Joined: May 2022 |
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Apr 2 2025, 01:16 PM
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Senior Member
1,861 posts Joined: Dec 2008 From: In The HELL FIRE |
QUOTE(Porkycorgi5588 @ Apr 2 2025, 01:13 PM) since every one in /k semua automatic become expert, i want to comment also, conlanfirm underground soil movement from the nearby housing project and salah Hujan. they just need 1mm movement slowly welding point brokenThis post has been edited by Pain4UrsinZ: Apr 2 2025, 01:17 PM Clubtoska liked this post
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Apr 2 2025, 01:17 PM
Show posts by this member only | IPv6 | Post
#130
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Junior Member
64 posts Joined: Aug 2008 |
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Apr 2 2025, 01:17 PM
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Junior Member
150 posts Joined: Oct 2009 From: Klang, Selangor D.E Status: Work Everyday |
Raya eve
Play mercun ?????? Kabooom |
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Apr 2 2025, 01:17 PM
Show posts by this member only | IPv6 | Post
#132
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Junior Member
880 posts Joined: Jan 2018 |
Inb4 contractor apa race?
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Apr 2 2025, 01:22 PM
Show posts by this member only | IPv6 | Post
#133
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Junior Member
500 posts Joined: Dec 2019 |
QUOTE(keyibukeyi @ Apr 2 2025, 01:17 PM) lol, actually ayam quite surprised it took so long for this theory to come up keyibukeyi liked this post
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Apr 2 2025, 01:23 PM
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Junior Member
150 posts Joined: Oct 2009 From: Klang, Selangor D.E Status: Work Everyday |
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Apr 2 2025, 01:24 PM
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Junior Member
150 posts Joined: Oct 2009 From: Klang, Selangor D.E Status: Work Everyday |
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Apr 2 2025, 01:27 PM
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Junior Member
251 posts Joined: Aug 2024 |
QUOTE(Pain4UrsinZ @ Apr 2 2025, 01:16 PM) since every one in /k semua automatic become expert, i want to comment also, conlanfirm underground soil movement from the nearby housing project and salah Hujan. they just need 1mm movement slowly welding point broken if like this also not possible.unlike city area, there are no concrete slab or road to hide sinkholes. if the soil below the pipe give way due to development, the surrounding would have sunk way before the cavity below become a possible source of pipe stress and pipe snap. but need to ask hotdayum la. he sexpert in digging his waifu punya lobang ![]() Clubtoska liked this post
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Apr 2 2025, 01:31 PM
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Junior Member
150 posts Joined: Oct 2009 From: Klang, Selangor D.E Status: Work Everyday |
Heavy truck housing project belum kira lagi, soil movement, why got road across that piping lulz
This post has been edited by keyibukeyi: Apr 2 2025, 01:32 PM |
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Apr 2 2025, 01:35 PM
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Senior Member
1,644 posts Joined: Jan 2007 |
QUOTE(Clubtoska @ Apr 2 2025, 12:42 PM) Firstly, I know absolutely nothing about gas pipes & engineering. But I just needed to visualise the situation based on what some members on this post was saying. Is this what happened? Immediately thought of the same thing![]() Often leverage easier to break stuff Clubtoska liked this post
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Apr 2 2025, 01:40 PM
Show posts by this member only | IPv6 | Post
#139
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Junior Member
195 posts Joined: Sep 2019 |
QUOTE(Porkycorgi5588 @ Apr 2 2025, 01:27 PM) if like this also not possible. Ayam tatau my job is mop floor whenever and wherever boss 2feidei tells me to mopunlike city area, there are no concrete slab or road to hide sinkholes. if the soil below the pipe give way due to development, the surrounding would have sunk way before the cavity below become a possible source of pipe stress and pipe snap. but need to ask hotdayum la. he sexpert in digging his waifu punya lobang ![]() |
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Apr 2 2025, 01:42 PM
Show posts by this member only | IPv6 | Post
#140
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Senior Member
5,363 posts Joined: Apr 2005 From: กรุงเทพมหานคร BKK |
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Apr 2 2025, 01:44 PM
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251 posts Joined: Aug 2024 |
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Apr 2 2025, 01:48 PM
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Junior Member
592 posts Joined: Oct 2018 |
QUOTE(Pain4UrsinZ @ Apr 2 2025, 01:16 PM) since every one in /k semua automatic become expert, i want to comment also, conlanfirm underground soil movement from the nearby housing project and salah Hujan. they just need 1mm movement slowly welding point broken not due to earthquake at Myanmar and acheh? or maybe some butterfly flap wings across the globe. |
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Apr 2 2025, 01:50 PM
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Junior Member
319 posts Joined: Nov 2011 |
QUOTE(keyibukeyi @ Apr 2 2025, 01:17 PM) U mean a leak and mercun and kaboom ? keyibukeyi liked this post
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Apr 2 2025, 01:59 PM
Show posts by this member only | IPv6 | Post
#144
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Senior Member
3,599 posts Joined: Jun 2009 From: MYBoleh.NET |
QUOTE(keyibukeyi @ Apr 2 2025, 01:23 PM) Is odourless. I believe the leakage happened for sometimes, just tiny leakage… and it accumulated till yesterday morning where something sparks it keyibukeyi liked this post
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Apr 2 2025, 01:59 PM
Show posts by this member only | IPv6 | Post
#145
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61 posts Joined: Oct 2015 |
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Apr 2 2025, 02:01 PM
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Apr 2 2025, 02:12 PM
Show posts by this member only | IPv6 | Post
#147
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Junior Member
911 posts Joined: Jun 2005 |
QUOTE(fuzzy @ Apr 2 2025, 02:01 PM) even a MP named wong chen also said it is a petronas station smallcrab liked this post
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Apr 2 2025, 02:13 PM
Show posts by this member only | IPv6 | Post
#148
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Junior Member
61 posts Joined: Oct 2015 |
https://www.mdpi.com/2076-3417/14/9/3609#:~...ried%20pipeline.
Untuk bacaan sahaja Tiada kaitan dgn yg hidup mati atau peristiiwa berlaku |
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Apr 2 2025, 02:19 PM
Show posts by this member only | IPv6 | Post
#149
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195 posts Joined: Sep 2019 |
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Apr 2 2025, 02:31 PM
Show posts by this member only | IPv6 | Post
#150
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Senior Member
7,106 posts Joined: Jan 2003 |
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Apr 2 2025, 02:36 PM
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Junior Member
251 posts Joined: Aug 2024 |
QUOTE(desmond2020 @ Apr 2 2025, 02:12 PM) I didnt know Putra Heights ADUN same as Kota Kemuning ADUN same as Sri Muda ADUN until that day You'd think Putra heigts ADUN would be KUALA LANGAT OR PUCHONG max_cavalera liked this post
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Apr 2 2025, 02:48 PM
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64 posts Joined: Feb 2008 |
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Apr 2 2025, 02:51 PM
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1,618 posts Joined: Jun 2008 |
QUOTE(hcmalaya @ Apr 2 2025, 01:59 PM) ya la sigboard ignore... no risk nobody care... now u see what happened!just like you put AWAS or danger sign on the power fence... will anyone go touch it lol... max_cavalera liked this post
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Apr 2 2025, 03:39 PM
Show posts by this member only | IPv6 | Post
#154
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17 posts Joined: Jan 2014 |
QUOTE(Skidd Chung @ Apr 2 2025, 12:03 PM) In the industry, but not an expert. Just average joe. My opinions are based on my experience, not 'expertise'. So i take it as u 50/50 in this gas pipe field. Your 1st answer to my earlier question is they can’t detect small leak then ur 2nd answer is they can find small leak but decide not to shut it down for repair due to it is high value industry. Now the question is does the small single gas leak like u said got the risk of explosion or not? Not shutting down the pipe for 1 small leak repair work is common industry practice or just ur personal opinion? |
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Apr 2 2025, 04:25 PM
Show posts by this member only | IPv6 | Post
#155
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Junior Member
41 posts Joined: Oct 2010 |
so , fireworks together with stressed gas pipeline = kaboom , a damage that cost victims a total of rm1,000,000,000 in total loss
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Apr 2 2025, 08:42 PM
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91 posts Joined: May 2022 |
inb4 a kid threw fire cracker into the hole max_cavalera liked this post
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Apr 2 2025, 10:31 PM
Show posts by this member only | IPv6 | Post
#157
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Junior Member
80 posts Joined: Oct 2021 |
march4th liked this post
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Apr 2 2025, 10:32 PM
Show posts by this member only | IPv6 | Post
#158
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Junior Member
847 posts Joined: Nov 2010 |
Let police investigate
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Apr 2 2025, 10:35 PM
Show posts by this member only | IPv6 | Post
#159
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Junior Member
717 posts Joined: Nov 2012 |
march4th liked this post
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Apr 3 2025, 12:15 AM
Show posts by this member only | IPv6 | Post
#160
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Senior Member
5,614 posts Joined: Jun 2006 From: Cyberjaya, Shah Alam, Ipoh |
QUOTE(ZeroSOFInfinity @ Apr 2 2025, 09:45 AM) Possible. But still can't discard theory the digging could have contributed to fracturing the pipe somewhere due to pressure applied I saw some other image of similar gas piping installation. Apparently the piping tanam is just merely 3-3.5 feet from the top of the tarmac…. Damn a backhoe would have ruptured it in minutes with that kinda shallow installation |
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Apr 3 2025, 08:05 AM
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Junior Member
479 posts Joined: May 2010 |
QUOTE(FreedomSeeker @ Apr 2 2025, 03:39 PM) So i take it as u 50/50 in this gas pipe field. Your 1st answer to my earlier question is they can’t detect small leak then ur 2nd answer is they can find small leak but decide not to shut it down for repair due to it is high value industry. Let me be clear and clarify in case you misunderstand my statements as implying that companies are being irresponsible because of profit. It is a step by step procedural framework of assessment and conclusion. Not a blanket 'SHUTDOWN' if leak detected policy. Now the question is does the small single gas leak like u said got the risk of explosion or not? Not shutting down the pipe for 1 small leak repair work is common industry practice or just ur personal opinion? A small leak is undetectable by operators running a large volume high pressure pipeline. The only way to detect such a leak is that you walk the entire line meter by meter and detect via smell or instrument like gas meters. There isn't a special alarm that goes 'beep boop' when there is a small leak. That is what I meant when I said a small leak is 'undetectable' by the operators sitting in a control room looking at gauges and running parameters in their DCS screen. Now let's just say a small leak is detected by chance by a passerby or during a routine inspection in a public urban area. They aren't going to go 'FULL EMERGENCY SHUTDOWN'. No, instead they will assess the situation and see if they can fix it while the pipe is live. Can they disperse the gas or dilute it so that they can work while the leak is present. Based on the risk assessment and job scope, they might lower the pressure to reduce the leak, to work on it. Or if it isn't possible, they might assess that the leak is maybe too dangerous to work on while the pipe is 'Live', so that will then escalate to planning of a pipe shutdown for a scheduled maintenance. So based on assessment, if a leak is assessed to be a danger to public and asset, of course the best thing to do is plan a shutdown ASAP. An explosion occurs when there is an accumulation of flammable gas in an oxygen rich environment and a source of ignition is introduced. A small leak in an open area won't cause an explosion if it is disperse by the wind. But a small leak underground, it might accumulate in crevices or in loose soil. We don't know if this was due to a sudden rupture causing high volume of gas to be released then ignited or caused by a small leak slowly saturating the ground then ignited when a car passed by. Small pipe leaks are a common industry experience not only for gas pipes but for ALL pipes in general. If a leak is detected, of course they won't ignore it, but will try to mitigate it. But don't expect an 'EMERGENCY SHUT DOWN' for every leak is found. If it can be fixed 'Live', it will be done so, if cannot, then a planned shutdown with all stakeholders informed and alerted. Most leaks can be just 'clamped' or 'sealed' off when it is small enough. So a shutdown of a billion dollar industry isn't necessary. If you want an example of gas pipes not being shutdown even if there are multiple small leaks. Did you know that there are hundreds of kilometers of natural gas pipes under the sea? Where a leak can only be detected by divers looking for bubbles? Do you think a pipeline as important as supplying an entire country worth of gas will be shutdown for a small leak under the sea? So I hope this clears up any misunderstanding of how pipes in the industry works. Yes, if dangerous to public and asset, shut it down. If not dangerous, plan a work to mitigate leak while pipe is still LIVE. Small leaks are difficult to detect. Some small leaks are acceptable. This post has been edited by Skidd Chung: Apr 3 2025, 08:10 AM arkasi, FreedomSeeker, and 1 other liked this post
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Apr 3 2025, 09:02 AM
Show posts by this member only | IPv6 | Post
#162
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Newbie
17 posts Joined: Jan 2014 |
QUOTE(Skidd Chung @ Apr 3 2025, 08:05 AM) Let me be clear and clarify in case you misunderstand my statements as implying that companies are being irresponsible because of profit. It is a step by step procedural framework of assessment and conclusion. Not a blanket 'SHUTDOWN' if leak detected policy. Very detail explanation. So can i take it as what u say here is common practice for how pipe industry deal with leakage not just ur personal opinion?A small leak is undetectable by operators running a large volume high pressure pipeline. The only way to detect such a leak is that you walk the entire line meter by meter and detect via smell or instrument like gas meters. There isn't a special alarm that goes 'beep boop' when there is a small leak. That is what I meant when I said a small leak is 'undetectable' by the operators sitting in a control room looking at gauges and running parameters in their DCS screen. Now let's just say a small leak is detected by chance by a passerby or during a routine inspection in a public urban area. They aren't going to go 'FULL EMERGENCY SHUTDOWN'. No, instead they will assess the situation and see if they can fix it while the pipe is live. Can they disperse the gas or dilute it so that they can work while the leak is present. Based on the risk assessment and job scope, they might lower the pressure to reduce the leak, to work on it. Or if it isn't possible, they might assess that the leak is maybe too dangerous to work on while the pipe is 'Live', so that will then escalate to planning of a pipe shutdown for a scheduled maintenance. So based on assessment, if a leak is assessed to be a danger to public and asset, of course the best thing to do is plan a shutdown ASAP. An explosion occurs when there is an accumulation of flammable gas in an oxygen rich environment and a source of ignition is introduced. A small leak in an open area won't cause an explosion if it is disperse by the wind. But a small leak underground, it might accumulate in crevices or in loose soil. We don't know if this was due to a sudden rupture causing high volume of gas to be released then ignited or caused by a small leak slowly saturating the ground then ignited when a car passed by. Small pipe leaks are a common industry experience not only for gas pipes but for ALL pipes in general. If a leak is detected, of course they won't ignore it, but will try to mitigate it. But don't expect an 'EMERGENCY SHUT DOWN' for every leak is found. If it can be fixed 'Live', it will be done so, if cannot, then a planned shutdown with all stakeholders informed and alerted. Most leaks can be just 'clamped' or 'sealed' off when it is small enough. So a shutdown of a billion dollar industry isn't necessary. If you want an example of gas pipes not being shutdown even if there are multiple small leaks. Did you know that there are hundreds of kilometers of natural gas pipes under the sea? Where a leak can only be detected by divers looking for bubbles? Do you think a pipeline as important as supplying an entire country worth of gas will be shutdown for a small leak under the sea? So I hope this clears up any misunderstanding of how pipes in the industry works. Yes, if dangerous to public and asset, shut it down. If not dangerous, plan a work to mitigate leak while pipe is still LIVE. Small leaks are difficult to detect. Some small leaks are acceptable. |
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Apr 3 2025, 09:26 AM
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Junior Member
479 posts Joined: May 2010 |
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Apr 3 2025, 09:36 AM
Show posts by this member only | IPv6 | Post
#164
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Senior Member
629 posts Joined: Mar 2010 |
This my daily commute going back home to, last drive here was on 27/3.
I still have the video of dashcam driving through here on 27/3. My wife has a friend who is 200m from the burst, total lost. |
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Apr 3 2025, 10:07 AM
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Newbie
17 posts Joined: Jan 2014 |
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Apr 3 2025, 10:13 AM
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Junior Member
356 posts Joined: May 2022 |
QUOTE(Skidd Chung @ Apr 3 2025, 08:05 AM) Let me be clear and clarify in case you misunderstand my statements as implying that companies are being irresponsible because of profit. It is a step by step procedural framework of assessment and conclusion. Not a blanket 'SHUTDOWN' if leak detected policy. Thanks for sharing. May i clarify further on the method of repair.A small leak is undetectable by operators running a large volume high pressure pipeline. The only way to detect such a leak is that you walk the entire line meter by meter and detect via smell or instrument like gas meters. There isn't a special alarm that goes 'beep boop' when there is a small leak. That is what I meant when I said a small leak is 'undetectable' by the operators sitting in a control room looking at gauges and running parameters in their DCS screen. Now let's just say a small leak is detected by chance by a passerby or during a routine inspection in a public urban area. They aren't going to go 'FULL EMERGENCY SHUTDOWN'. No, instead they will assess the situation and see if they can fix it while the pipe is live. Can they disperse the gas or dilute it so that they can work while the leak is present. Based on the risk assessment and job scope, they might lower the pressure to reduce the leak, to work on it. Or if it isn't possible, they might assess that the leak is maybe too dangerous to work on while the pipe is 'Live', so that will then escalate to planning of a pipe shutdown for a scheduled maintenance. So based on assessment, if a leak is assessed to be a danger to public and asset, of course the best thing to do is plan a shutdown ASAP. An explosion occurs when there is an accumulation of flammable gas in an oxygen rich environment and a source of ignition is introduced. A small leak in an open area won't cause an explosion if it is disperse by the wind. But a small leak underground, it might accumulate in crevices or in loose soil. We don't know if this was due to a sudden rupture causing high volume of gas to be released then ignited or caused by a small leak slowly saturating the ground then ignited when a car passed by. Small pipe leaks are a common industry experience not only for gas pipes but for ALL pipes in general. If a leak is detected, of course they won't ignore it, but will try to mitigate it. But don't expect an 'EMERGENCY SHUT DOWN' for every leak is found. If it can be fixed 'Live', it will be done so, if cannot, then a planned shutdown with all stakeholders informed and alerted. Most leaks can be just 'clamped' or 'sealed' off when it is small enough. So a shutdown of a billion dollar industry isn't necessary. If you want an example of gas pipes not being shutdown even if there are multiple small leaks. Did you know that there are hundreds of kilometers of natural gas pipes under the sea? Where a leak can only be detected by divers looking for bubbles? Do you think a pipeline as important as supplying an entire country worth of gas will be shutdown for a small leak under the sea? So I hope this clears up any misunderstanding of how pipes in the industry works. Yes, if dangerous to public and asset, shut it down. If not dangerous, plan a work to mitigate leak while pipe is still LIVE. Small leaks are difficult to detect. Some small leaks are acceptable. Will the use of any equipment to fix it can create safety hazard in the area..say a spark when trying to seal the pipes ? |
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Apr 3 2025, 10:17 AM
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Senior Member
2,547 posts Joined: Dec 2007 |
I tell u. Even though many ppl fail SPM, their science knowledge on gas leakage is more power than PHD!
level black widow. ![]() |
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Apr 3 2025, 10:56 AM
Show posts by this member only | IPv6 | Post
#168
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Junior Member
80 posts Joined: Oct 2021 |
Only utusan i think interveiwd the victims that confirm there was an intrusion. Others Like the star , NST , mkini , bfm goyang kaki ?!!
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Apr 3 2025, 11:04 AM
Show posts by this member only | IPv6 | Post
#169
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Senior Member
2,256 posts Joined: Feb 2012 |
QUOTE(ZeroSOFInfinity @ Apr 2 2025, 08:56 AM) Possible theory - 28 to 30 March (afternoon) digging to place the sewerage pipes. Could have fractured the gas pipe nearby due to pressure during digging. Your logic very flawed30 March (evening) - keep equipment because Raya on Monday (31 March). Car video at night showed nothing there. Between 30 March to 1 April - gas leaking, no worker detect or smell because not working. 1 April - pressure hit critical level, and boom. Gas leak will contribute pressure grow???? So my tyre low pressure I go leak gas?? The leak gas already happen 1 raya mercun nearby gg all |
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Apr 3 2025, 11:36 AM
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Junior Member
485 posts Joined: Jan 2010 |
can macgyver use chocolate or bubble gum to seal the slow leak?
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