Base material for Welder Qualification

[Babu Chathoth]

Hi friend,

can anybody can assists to clarify , is it applicable for the only P1 material can use for the WQT test for  P1 material with clad pipe  approved WPS ,

[Sajeev P]

Greetings, 

As per Sec. IX, you have to qualify the welders in accordance with QW-301 for joining  the base material portion of the cladded  pipe. And for welders  who will apply  the cladded  portion  of a weld between  clad materials,  shall be qualified  in accordance with QW-381.

If the welder is qualified on P1 material, then the welder is qualified to  weld only  base material portion  of the  cladded pipe. 

The welders can qualify  as per QW-301 & QW-381 separately  or alternatively  the welders may qualify  using cladded test coupon of at least  3/8in. (10mm)  thick  and of dimension such that  a groove weld can be made to join  the base  material  and the corrosion resistant  weld metal overlay can be applied to the completed groove weld as per QW-383.

Regards, 

Sajeev  

On Wed, Jan 22, 2020, 09:20 Babu Chathoth <babu...@gmail.com> wrote:

Hi friend,

can anybody can assists to clarify , is it applicable for the only P1 material can use for the WQT test for  P1 material with clad pipe  approved WPS ,

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[Charles Jacob]

Dear, 

Pl use the provisions of QW-423.1. You can use P1 material for performance qualification. 

Regards, 

Charles V Jacob 

Welding consultant 

Magnum Consultancy Services 

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[Amitabh Bhattacharya]

Check out QW 380/381 of Sec IX as well to take note of the essential variables  mentioned therein.

Thanks 

Amitabh

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