Dear All,
Followings are brief details of five PQRs.
PQR No. Process Base metal B.M. Thick B.M. RANGE PWHT Impact
#1 SMAW P1Gr3 to P1Gr3 0.24 Thk 1.6 -12 N/A
#2 SMAW P1GR3-P1GR2 0.24 Thk 1.6 -12 N/A YES (-51 F)
#3 SMAW P1Gr3 to P1Gr3 1.5 THK 16 - 200 1150/10 HRS YES (-51 F)
#4 SMAW P1GR3-P1GR2 1.5 THK 16 - 200 1150/08 HRS ES (-60 F)
#5 SMAW P1Gr3 to P1Gr3 1.75 THK 16 - 200 N/A YES (-51 F)
Based on above PQRs,
1. Is it acceptable to prepare a single WPS with two welding condition ( with and without PWHT), with notes stating thickness limits for both conditions.
2. If yes, what would be thickness range for welding with & without PWHT.
3. With reference to ASME IX- QW-200.4 Combination of Welding Procedures,: If a company has two WPS, one in GTAW process and second in SMAW process, is it acceptable to apply individually both WPS on single joint? Or new WPS will be required combing both WPS?
Your valuable feedback will be highly appreciated.
Regards,
A.Husain
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