Re: [MW:20456] Weld joint Repair

Dear Saidur,

for mainline welding API 5L-X 60 series pipe with thickness up to 15 mm,weld repair is allowed for max. two times prior to take cut out decision. Any how it be given in welding . spec. or in work procedure for production / repair welding procedures. 

regards

jijilal k m

On Tue, Apr 1, 2014 at 12:12 AM, Saidur Rahman <saidur04cuet@gmail.com> wrote:

Dear Experts,

I am working on 30" High pressure gas transmission pipeline project. Today i found that in one RT film there was 100 mm Internal undercut. After repair RT film shows that again 45 mm internal undercut with Internal Concavity. But my superior says that only one time repair is acceptable & joint should go for cut-out  because if again repair then Susceptible micro structure will form. my question is How many times repair is acceptable? Pipe material API 5L-X 60. thickness= 14.3 mm

and also for Process piping how many times repair is acceptable if PWHT is a service requirement?

Regards,

Md. Saidur Rahman

QA/QC

GTCL

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