api 5l x60 welded pipe linepipe psl1 psl2 supplier

api 5l x60 welded pipe linepipe psl1 psl2 supplier

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Ministry of Commerce of the P.R.China China Commodity Net

Nondestructive quality control inspection then takes place, after which the pipes are welded to tool joints. Pipes then undergo weld heat treatments and a weld finishing processes that removes welding stress. More tests, including hardness, pressure and non destructive inspection are carried out on the finished drill pipes before final coating

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