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[MW:25329] AWS D1.1 & ASME SEC.IX

By Materials & Welding
Dear Experts,

Just a query regarding PQR & WPS generation. the project spec. calls
to follow PQR &
WPS according to Sec. IX for construction of pressure vessels ( MOC-
SA 516 Gr. 70 N). complying to to ASME Sec. VIII Div.1.

Also the allied base frame structures ( skid frame) too with the above code.
The work had been assigned to 2 diff. sub-cons & one of them made PQR
& WPS according to AWS D1.1 in order to use the welding of
structures. this was done due to the queries & enforcing of Main cont.
engineer though spec. calls for Sec. IX !

But here, one sub-con is unable to provide AWS D1.1 PQR & WPS due to
practical difficulties & says both don't have much differences.

Our doubt is that, once the mecahnical integrity of the intended weld
is proven with Sec.IX PQR, then what is the necessity to call for AWS
D1.1 PQR, WPS etc...?

your valuable feedbacks are highly appreciated.

Thanks in advance,
kumar.

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