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api 5l Seamless Steel Pipe suppliers

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  • [Industry News] Testing method of seamless steel pipe hardness

    Seamless steel pipes must be tested for mechanical properties. Seamless steel pipes are widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes, automobile transmission shafts, bicycle frames, and steel scaffolding used in construction. Steel pipes are used t

  • [Industry News] Production process of seamless steel pipe

    ①Main production process of hot-rolled seamless steel pipe (main inspection process):Tube billet preparation and inspection → tube billet heating → perforation → tube rolling → waste tube reheating → fixed (reduced) diameter → heat treatment → finished tube straightening → finishing → inspection (no

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