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[MW:33959] Re: MANDATORY HARDNESS TEST AFTER PWHT

By Materials & Welding
It is depending on Design Construction code / Client specification
Normally ASME  SEC I , piping,  equipment does not call  for Hardness test .
As a practice , random hardness checks are  carried out to ensure effective PWHT.
Maximum Hardness reading shall not exceed 275 - 280 BHN .
Hardness checking procedure shall outline Testing Method, type of equipment, Operator 

API 938 , does specify Hardness of 250 BHN maximum .

Regards

Vishwas - IWE
International Welding Engineer 

 
On Wednesday, January 18, 2023 at 1:18:58 PM UTC+5:30 MACARIO PALOLA wrote:
Sirs,

Is it mandatory to perform hardness test after pwht of P91?
Do we have supporting code?

Thank you for your reply.


Mac

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