Temperature derating factor for CPVC

[hiren3010]

What is Temperature derating factor for CPVC pipes?
n is it different than the P/T rating?
To what this derating factor shall be multiplied?

Thank u in advance...
Hiren.

 

[STYMIEDPIPER]

You may want to post this inquiry on the 'Plastics Engineering Forum'
Also, look at the link posted within thread712-145142

 

[jdarco]

The derating factor should be applied to the system pressure rating. So if your maximum rated system pressure is 150 psi (use lowest rated component for rating),and your derating factor is .70, you maximum system pressure at temperature is 150x.70=105 psi. See

http://www.nibco.com

They have a pretty good tech manual for plastics that should help you