Tack welding

[mahammed javeed]

Gentle men,

My question regards to the tack welding. I have to make a  bridge tack weld on a 2" SS pipe. As per my company procedure tack welding shall be done by a qualified welder with a qualified procedure. 

As per my knowledge bridge tack is a fillet weld and if a welder is qualified on 6G position on a pipe he is qualified to do so. 

The problem with my client is he said the procedure is not qualified as the base metal thickness qualified for the WPS is 1.5mm to 8.4 mm and the actual base metal thickness is 8.7mm. 

As it is a fillet weld I think the WPS is qualified for tack welding also

Hope to get your clarification on this subject.

Best Regards

M. Javeed

[george....@gr.bureauveritas.com]

Is that a tack weld which is going to remain on place?
If not, you need neither a qualified WPS nor a qualified welder
Best regards
Dr Georgios Dilintas
Authorized Nuclear Inspector
Authorized Inspector Supervisor
HBS Regional Technical Manager

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[Vikas Sahu]

Yes , tack welding can be done,refer article 4 sectionIX fillet qualification table

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[rajesh s. mhaske ,Engineer Welding ,PUNE,INDIA]

Dear sir
   Not required to re-qualified WPS,PQR     If the PQR  qualify on groove weld then range of  Fillet  qualification is All fillet sizes on all basemetal thicknesses and all diameters , Fillet welds are qualified when the groove weld is qual ified
in accordance with eitherQW-451.1 or QW-4S1.2 (see QW-202.2) Refer  the ASME sec-ix QW-4S1.4

Regards
Rajesh S Mhaske
Engineer Welding
CSWIP 3.1,ASNT Level -II

[sushil gaur]

Is that a tack weld which is going to remain on place?
If not, you need neither a qualified WPS nor a qualified welder

refer article 4 sectionIX fillet qualification table

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sushil gaur

[Dick Overkleeft]

Dear Mr. Javeed, The requirements may be different by standard.

However since you have to be able to proof that the the welding procedure matches the base material, you will need a qualified welding procedure for the base material and process, even if you remove the tackweld. You also need a qualified welder. The qualification for a fillet weld may do.

Best Regards,

ing Dick Overkleeft EWE

Bureau Veritas Marine

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