Short answer definitely but the issue is not inverter or non inverter but what type of gas is used in the inverter or non inverter AC.

Mostly what's sold now uses R410a gas with R32 as the replacement over that. Older AC we grew up with uses freon and then R22 which was was phased out. R22 based AC are current install base in many homes but market available are now R410a and in appearing recently in small numbers R32.

Turning the question around should be what pipe thickness is safe for R410a/R32 based AC. Thus, it boils down to what thickness of AC copper pipe is able to withstand the operating pressure of R410a and R32 with a high margin of safety.

Thickness is stated in standard wire gauge numbers but now commonly in millimetres. Older pipes uses to be gauge 25 (0.51mm), 24 (0.56mm) or 23 (0.61mm). These are ok for R22.

R410/R32 however operates at 1.6/1.7 times higher pressure than R22. The minimum thickness recommended for their use is 0.71mm or 0.76mm but now many AC manufacturers specify 0.81mm minimum. There are AC pipe manufacturers do manufacture other thickness like 0.89mm, 0.91 mm or 1.0mm and higher. There are AC like multi split systems that could require thicker like 0.9 or 1.0mm or more. They are also used in [update: VRV] or in tandem with cooling and heating that are only common in European markets.

That said, follow the manufacturer specification in the installation manual. Panasonic and Fujitsu normally recommends 0.81mm pipe thickness for R410a. A good example is seen here.

This post has been edited by halcyon27: Dec 9 2017, 11:38 AM