Recommended Thickness for Copper Pipe

There are 2 types of offering in the market

  • Gauge 22 or SWG22 which is 0.71mm thick
  • Gauge 23 or SWG23 which is 0.61mm thick

There are different grading and standard given to different pipe diameter of the copper pipes. The household air-conditioning system usually operate at a maximum of 330psi. The standard design of pipe thickness is 1.5 times the maximum pressure however the above specification marginally meets the requirement. But, the aircon system come with a high pressure sensor that cut off the system when there is a high operating pressure.

Thus using both SWG 22(0.71mm) or SWG 23 (0.61mm) is acceptable in market norms. We will definitely go for thicker copper pipe whenever possible.