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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 
 
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.

    
 
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