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TWI TWI is a world leading research and technology organisation established in 1946. From bases in the UK, USA, China, Malaysia, Middle East, India a ... 568 views Career Discussions gunawan_eko gunawan_eko 08:34 Jun-24-2009 Hardness Test Dear Gent, Could please assist me, regarding the Hardness test require Did still require Hardness test for Materaial P1 with wall thickness above 19mm (subject for PWHT) as per ASME 31.3 table 331.1.1 ?    Reply  Translate  Close   Roger Duwe NDT Inspector, API-510, 570, 653 MISTRAS, USA, Joined Jan 2009, 148 Roger Duwe NDT Inspector, API-510, 570, 653 MISTRAS, USA, Joined Jan 2009 148 21:51 Jun-24-2009 Re: Hardness Test In Reply to gunawan_eko at 08:34 Jun-24-2009 (Opening). No, hardness testing is not required to confirm adequate PWHT of P-1 material >19mm, per B31.3. Per 331.1.7(a), if no hardness limit is listed in the table, testing is not required. However, it is a VERY good idea to do a few spot hardness tests of PWHT'd welds. Makes everybody 'happy', by proving that your PWHT was proper. The number you are looking for is Brinnell Hardness 'BHN' of 200 or less.    Reply  Translate  Close

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