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API 5L Grade X70 Cracking in Bend sample

API 5L Grade X70 Cracking in Bend sample

API 5L Grade X70 Cracking in Bend sample

(OP)
hi

Did anyone encountered cracking in Bend sample of SAW API 5L grade X70 pipes?

RE: API 5L Grade X70 Cracking in Bend sample

I have been working as a consultant with a company that induction bends lower strength grades of API 5L and never encountered this problem. Where is the cracking in the bend and how does it appear.

RE: API 5L Grade X70 Cracking in Bend sample

Cold bends, induction bends, diameter wall thickness, crack location? You need to provide this type of info.

RE: API 5L Grade X70 Cracking in Bend sample

(OP)
The crack occur at the fusion line of the face bend sample.

Crack orientation is longitudnal.

Pipe was welded by SAW process.

It was a cold bend.

Wall Thickness is 11.2mm and 48" diameter

RE: API 5L Grade X70 Cracking in Bend sample

Sounds like a weld defect in the long seam SAW that opened during testing. You need to evaluate the nature of the weld defect using a metallurgical lab .

RE: API 5L Grade X70 Cracking in Bend sample

Agree with metengr.

RE: API 5L Grade X70 Cracking in Bend sample

Lab analysis and some QC involvement to check storage and use of consumables

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