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Up Topic Welding Industry / Technical Discussions / HARDNESS TEST BEFORE AND AFTER PWHT
- - By MKNIK (*) Date 08-22-2014 13:54
Hello, please someone clarify me this.

Regarding hardness tests under ASME B31.3 2010, Table 331.1.1, paragraph 331.1.7. is performing circumferential welds in pipes with 0.844 inch thick ASTM A 106 Gr. B. transport of sour gas.
The question is what are the criteria for assessing who takes shots hardness before heat treatment and after heat treatment?
And under that rule or code?

I appreciate your support by sharing their knowledge
greetings

Rusbeli r
Parent - By js55 (*****) Date 09-02-2014 14:52
There are no requirements for hardness before heat treat. Hardness is tool used to verify that heat treat has been effective.
Parent - By Joey (***) Date 09-03-2014 01:41 Edited 09-03-2014 01:51
Hardness test before PWHT is not a code requirement, check your project spec if it's a client requirement.
Hardness test is normally performed after the heat treatment, but with a satisfactory graph to verify whether there is a proper control of postweld heat treatment.
Up Topic Welding Industry / Technical Discussions / HARDNESS TEST BEFORE AND AFTER PWHT

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