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
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
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