Combining ASME Group Numbers
Combining ASME Group Numbers
(OP)
I am trying to develop a WPS that would qualify the following base metals and thickness range using the SMAW process with low hydrogen rod.
P-No 1 - Group No 1, 2, 3 to P-No 1 - Gr No 1, 2, 3. With a thickness range of .216" to 2". Impact testing and PWHT will be required.
Would the following PQR's create a WPS that will cover all combinations of P1-Gr1, 2, 3 with a thickness range of .216” to 2”. Or would each combination (Gr.1-2, 1-3, 2-3) require a PQR with each wall thickness (.216”, .375’, 1”).
PQR 1 – P1-Gr1 to P1-Gr2. Wall thickness = .216”
PQR 2 – P1-Gr1 to P1-Gr3. Wall thickness = .375”
PQR 3 – P1-Gr2 to P1-Gr3. Wall thickness = 1”
P-No 1 - Group No 1, 2, 3 to P-No 1 - Gr No 1, 2, 3. With a thickness range of .216" to 2". Impact testing and PWHT will be required.
Would the following PQR's create a WPS that will cover all combinations of P1-Gr1, 2, 3 with a thickness range of .216” to 2”. Or would each combination (Gr.1-2, 1-3, 2-3) require a PQR with each wall thickness (.216”, .375’, 1”).
PQR 1 – P1-Gr1 to P1-Gr2. Wall thickness = .216”
PQR 2 – P1-Gr1 to P1-Gr3. Wall thickness = .375”
PQR 3 – P1-Gr2 to P1-Gr3. Wall thickness = 1”
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RE: Combining ASME Group Numbers
Probably they don't, so answer is NO.
RE: Combining ASME Group Numbers
RE: Combining ASME Group Numbers
Best regards - Al
RE: Combining ASME Group Numbers
Why not: P1G1 - P1G2: 1" coupon no impacts = 3/16" - 2" qualified. Then do a .250" coupon using the same variables with the addition of impacts = .125" - .500" qualified: Combine the two PQRs: Result .125" - 2" with impacts qualified.
Then do the same for the other combinations.
PWHT will need to cover the max thickness....or more for repairs.