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Jeldon (Chemical) (OP)
3 Jun 13 21:48
Hello friends, greetings. I need help.
I have a weld metal with base P No. 4, High pressure pipe with wall thickness of 8.0 mm, in accordance with paragraph K331.1.3 (b) (1) of the code ASME B31.3, which temperature should be used?
Thank you
metengr (Materials)
4 Jun 13 8:25
See Table 331.1.1 for P-No 4 base material, PWHT is 704 to 746 deg C.
wegm (Industrial)
4 Jun 13 8:33
For base metal P-No 4 and thickness 8mm there is no PWHT requirement (ASME B31.1, Table 331.1.1).
You could also have a look to the below link that resolves a relevant issue:
metengr (Materials)
4 Jun 13 8:45


For base metal P-No 4 and thickness 8mm there is no PWHT requirement (ASME B31.1, Table 331.1.1).

This is for B31.3, not B31.1
Jeldon (Chemical) (OP)
4 Jun 13 8:59
My metal base is A 335 Gr P11 - Limit of tensile strength 60 ksi, and paragraph K331.1.1 Heat Treatment Requirements. The provisions of to. 331 and Table 331.1.1 apply, except those specified below.

(a) Heat treatment is required for all thicknesses of P-In. 4 and 5 materials.

So what temperature should I use, and this value should be set By Design engineering
Helpful Member!  metengr (Materials)
4 Jun 13 9:28

PWHT is 704 to 746 deg C.

Helpful Member!  wegm (Industrial)
15 Oct 13 7:46
Sorry, the above link doesn't work, you could have a look at this link:

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