[MW:30998] NACE SP0472 edition 2010 - ROAD MAP SP0472 TABLE 1

We have Pipe Line for Wet H2S service . PWHT is addressed in drawing by designer .

There are 3' to 96 " pipe lines  with thk @4mm to 15 mm , made up of  P NO 1 GR 1 - SA 106  Gr B material.

We intend to  follow road map and avoid PWHT  as below

1. Weld deposit - Weld deposit with  ASME  A-NO. 1 chemistry  - maximum HARDNESS  248HV10 

2.CE of base material Control Method (CE of production base metal  shall not  exceed  CE of PQR specimen by 0.03 %   and HAZ hardness check - maximum   HARDNESS 248HV10

Is it intent of STANDARD Edition 2010 that HAZ Hardness Control (maximum HARDNESS  248HV10 ) shall be 

by CE of base material Control (as stated above)  AND  One or more Thermal Methods .

 Solely CE of base material Control  is not sufficient .

 Can  the thermal Method  be  waived ?

Pl. guide further 

 

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