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[MW:3480] Re: WPS/PQR, Range Qualified

By Materials & Welding
thickness limits are defined in QW 403.6 and 403.8, diameter is not a restriction for procedure but thickness limits are.

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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