what is a wall thicknes of 1/8 copper pipe to carry liquid CO2. Does ACR pipes, which are sold at stores, meet requirements ?
Typical wall thicknesses are 0.065 and 0.049. Conceptually, this would be fine for carrying liquid CO2. However, for that small of a tube, you need to make sure it is very well insulated. Otherwise, you're going to have a lot of vaporizing and just end up with CO2 gas. I'm assuming you're doing this at relatively lower pressures. For these wall sizes, the pressure limit is 2400 psi for the 0.049 wall and 3200 psi for the 0.065 wall.
