Please refer below interpretation,
Interpretation: IX-07-09
Subject: QW-401.3 and QW-403.6, Thickness Range Qualified for Impact Testing (2007 Edition)
Date Issued: May 1, 2008
File No: 08-576
Background: A welding procedure qualification was performed on a 1 in. (25 mm) thick test coupon. Tension and bend tests were performed on the 1 in. (25 mm) plate. A second welding procedure qualification was performed on a 0.24 in. (6 mm) plate and only impact testing was performed. All of the essential and supplementary essential variables remained the same except for the coupon thickness.
Question: May the above PQRs be used to support a WPS for materials requiring notch toughness with a qualified thickness range of 0.1875 in. (5 mm) to 2 in. (50 mm)?
Reply: Yes.
Also, see
QW-401.3 Supplementary Essential Variable (Procedure).
When a procedure has been previously qualified to satisfy all requirements other than notch toughness, it is then necessary only to prepare an additional test coupon using the same procedure with the same essential variables, but additionally with all of the required supplementary essential variables, with the coupon long enough to provide the necessary notch-toughness specimens.
Conclusion: You need to redo the PQR & only need to perform Impact test at -46 deg C (Weld & HAZ) , with keeping the same essential & supplementary essential variables as per previously done PQR.
Also check the electrode to be used in second PQR can be used or not at -46 deg C as per ASME section IIC.
Regards
Hiren Sevak
Dear experts,--
Please help out to clear my doubt.
I have qualified a WPS/PQR with impact -29 deg C, now customer want the WPS/PQR shall be qualified with impact in -46 deg C. Also there is no remaining coupon piece available for impact testing with -46 deg C.
My question here is, should I weld a coupon and only do impact test as required by customer and attached to PQR will be sort out this issue.?
or
Should I REDO a PQR with all mechanical test which includes Tensile, Hardness, Bend along with impact will sort our this issue.?
Requesting you to please provide me ASME IX clause reference.
Anticipating for you kind help.
Thanks & Regards.
M.K.Mubeen
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The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
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