to weld 20mm thickness your PQR test coupon thickness shall be at least 10mm
On Sun, Oct 11, 2009 at 10:53 AM, Shashank Vagal <nach_sam@yahoo.com> wrote:
Hi Group Members,
Please see the following and advise.
Shashank Vagal
Query:
dear every one,
i have this problem i need to know the thickness range or pipes diameter range for the wps in which standard i think its in asme sec 9 but where ???
for exmple if i have wps for thickness 15 is it cover the 20 mm
waiting answer please
regards
My Reply:
A WPS is a guideline to ensure joint integrity as proven by PQR + applicable mech tests + NDT. It is intended for all job sizes once the welding technique used proves itself in these tests. The sizes etc come in to picture by qualifying welder on test coupons of a given size as per your job requirements. ASME IX stipulates weld metal deposit and not job size. Please ref to QW 450 - 461.
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