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Preheat temperatures for P5 and P9 materials
Posted: 04 Nov 2010, 06:09
by octane
What is the recommended preheat temperature for A3335 Gr. P5 and P9 materials?
Re: Preheat temperatures for P5 and P9 materials
Posted: 04 Nov 2010, 08:46
by arcpro
It's from 250-300 deg C.
Re: Preheat temperatures for P5 and P9 materials
Posted: 04 Nov 2010, 19:20
by ben
Against which piping code you are working?
Pre-heat temperatures have been mentioned in piping codes against P- numbers of different materials.
Re: Preheat temperatures for P5 and P9 materials
Posted: 05 Nov 2010, 04:45
by mechcolor
B31.1:
P9: 400 deg F
P5: 300 deg F
B31.3:
350 deg F for both.
Above are minimum requirements.
Re: Preheat temperatures for P5 and P9 materials
Posted: 05 Nov 2010, 10:55
by octane
Thanks everyone.
I got it.