Flakes Of steel coming our of CS SMLS Pipes

[bilalkardame]

Hello experts,

On our recent supplies of CS SMLS API5L B Pipes for a project in UAE, our clients have reported a problem. upon witnessing, flakes of steel are coming out when the pipes are shot blasted for paintings.

please advise what can be the cause of such problem

 

[stanweld]

Is the condition on heavy wall pipe or thin wall or both?

 

[EdStainless]

Hot finished?
Is it metal or actually just scale flaking off?

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Plymouth Tube

 

[bilalkardame]

it is a 10" Sch 40 & 14" Sch STD Pipes. the pipes are hot finished as per API5L and if you review the photograph, it is metal flaking off.

 

[bilalkardame]

sorry, the pipes are ASTM A106 B/API5L B.

 

[stanweld]

I would guess that the flaws resulted from severely worn dies and improper hot finishing temperature. I would need more info on the specific manufacturing method to provide a better guess.

 

[redpicker]

Looks like a surface quality issue with the hot rolled product. Not a corrosion issue, I'd guess that it came from the steel mill like this.

rp