FAQ

API 5L Carbon Steel Seamless Pipes

This specification covers seamless and welded steel line pipe. It includes standard-weight and extra-strong threaded line pipe. It includes standard-weight and extra-strong threaded line pipe; and standard-weight plain-end, regular-weight plain-end, special plain-end, extra-strong plain-end, special plain-end, extra-strong plain-end pipe; as as well as bell and spigot and through-the-flow line(TFL) pipe.

API 5L seamless steel pipe is a round steel product that has hollow sections and no seam around and it is made by piercing a steel ingot or a solid pipe billet to a hollow billet. API 5L seamless steel pipe is manufactured after hot rolling, cold rolling or cold drawing process with the wall thickness range from 2 to 50mm. Its surface is treated by annealing, hand polishing, mechanical polishing and other process as well as it receives oil immersion, painting, passivation treatment, phosphate treatment, shot peening etc. As a result, it has a high quality surface finish and outstanding abrasion resistance.

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