Monday, August 22, 2016

Re: [MW:25278] Welder qualification

Dear Krisanu Bhunia and Experts,


FOR WELDER QUALIFICATION TEST


I would like to share my experience as below, ( correct me if I am wrong. )


From Quality point of View:

·         First thing is " Welder qualification test" is done to determine the ability of a welder

to deposit sound weld metal.

·         Sound metal means a quality weld at first time. ( without making visual defects like cracks, undercuts, porosity, excess reinforcement, Etc. )

·         As per ASME SEC IX, the only visual criteria you could find as mentioned below:

·         QW-194 Visual Examination — Performance

Performance test coupons shall show complete joint

penetration with complete fusion of weld metal and base

metal.


From Production Point of View: -  During the test, If a welder making undercut or with Visual porosity – please reject him, before your client does the same, since this welder if qualified  - he will make more undercuts and porosity in the Job and uses grinder repeatedly / wastes precious time schedule of the project / off course increase the work of Welding Inspector and cannot make a productive output results. Hope you got the message.


AND FINALLY – Client have to decide !


Regards,


Sathish

Jazan, Saudi.


On Sun, Aug 21, 2016 at 12:12 AM, Krisanu Bhunia <krisanu.bunty@gmail.com> wrote:
Daer.ALL
Please tell me cluster porosity acceptance limit for Welder qualification test as per ASME XI or VII.

 Regards
krisanu bhunia

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