Bob NH
In the Trades
"I cannot find a recommended air pressure for copper tubing, but 175 psi sounds like a bit beyond what would be recommended."
The rated pressure for 3/4" Type M Annealed is 346 psi at 150F and the burst pressure is about 2350 psi. Type L has a working pressure of 495 psi.
The pressure rating of 3/4" joints with 95/5 tin/antimony solder is 1000 psi, but the rating for 50/50 tin/lead is only 200 psi, so tin/antimony is the best choice for high pressure.
The rated pressure for 3/4" Type M Annealed is 346 psi at 150F and the burst pressure is about 2350 psi. Type L has a working pressure of 495 psi.
The pressure rating of 3/4" joints with 95/5 tin/antimony solder is 1000 psi, but the rating for 50/50 tin/lead is only 200 psi, so tin/antimony is the best choice for high pressure.