PQR TEST FAILURE

[QA/QC]

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

[Charles Jacob]

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. 

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