API 5L Grade X70 Cracking in Bend sample

[goodbadgood]

hi

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

 

[metengr]

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.

 

[weldstan]

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

 

[goodbadgood]

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

 

[metengr]

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 .

 

[weldstan]

Agree with metengr.

 

[JackMats]

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