As per Client Requirement, we need to do the 10mm Carbon Steel Deposit
on 250mm Thick Alloy Steel Tube Sheet( 1.25Cr, 0.5Mo).
What will be the PWHT requirement for deposit.
If we consider the exemption in UCL-34 (Soaking Time as per deposit
thickness), that is applicable for Corrosion Resistance Weld Overlay.
Carbon Steel over Alloy Steel is not Corrosion Resistance Overlay.
How to Qualify Procedure for the same or we can use butt welded
qualified PQR.
The main issue is PWHT time?
Regards
Jaspal Singh, CWI-AWS, CSWIP-3.1
Quality Assurance
Process Equipment Division
ISGEC, Yamuna Nagar, Haryana -135001
Phone: 911732307251
Ext: 251 Mb: +91 9996624244
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