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Actual Max Working Pressure of Class 125 Brass Fittings at Room Temp.

Thread starter jtrun
Start date Aug 18, 2015

Status: Not open for further replies.

Aug 18, 2015

jtrun

Mechanical

I have an existing compressed air installation where I need to increase the working pressure of the system from 125 psig to 175 psig. There are a couple of 3/4" cast brass fittings in the system and I am trying to determine if I need to replace them or not to meet the higher pressure. In looking around the internet and various reference texts I have not found a solid reference that says that a class 125 fitting is rated to ### psi at a temp. One reference that I did find was a note from a Merit Brass stating that Class 125 fittings are good for 200 PSIG at 72°F, however I do not know if I can apply this across all MFGs.

Anyone run across a reference or dealt with this previously?