Dear Mubeen,
No need to REDO the entire test.
You can weld a test coupon by using the existing WPS and only Impact test shall be carried out at -46 deg C.
Heat input shall be controlled during test coupon welding and H.I values shall not exceeds the previous qualified PQR value and ensure other essential shall be as per previous qualified PQR.
As per ASME SEC 09 clauses /tables from QW 252 through QW 266, increase in heat input is a supplementary essential variable. This refers to QW 409.1.
please refer to the above mentioned clause in ASME SEC 09.
Regards,
Sudhakar.K
On Mon, Sep 3, 2012 at 6:33 AM, mubeen mubeen <mubeenaws@gmail.com> wrote:
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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