Materials & Welding: Re: [MW:32595] PQR TEST FAILURE

Sunday, November 7, 2021

Re: [MW:32595] PQR TEST FAILURE

Dear QA/QC

Bend and impact test failure means that you have more interpass temp during welding. And also undercuts between passes and not cleaning between passes.

We can infer the following:

1. Welder and inspector did not pay attention to interpass temp in an attempt to complete the joint faster.

2. Welder welded with high voltage arc which created undercuts on the weld joint face and did not remove those undercuts by grinding.

3. Heat input during welding was not calculated and maintained during welding.

4. Check the compatibility of filler metal used for welding this dissimilar joint.

The only way is to re weld another pqr with following corrections.

Regards,

Charles.

On Fri, Nov 5, 2021, 5:53 PM QA/QC <adnanziad49@gmail.com> wrote:

Dear masters
durring the mechanical tests for our WPS
1- piping B31.3
SS to DSS TEST COUPON 2" thk 3.05 mm

in the bending test with 4 test one is failure rejected
so in this case IS IT ACCEPTABLE

ALSO FOR ANOTHER PQR
2- PIPING B31.3
CS TO CS PIPE TO FLANGE API 5L GR B TO ASTM A105

THE FAILURE IN HAZ OF FLANGE WHAT IS THE ACCEPTABLE HERE

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