Home > Knowledge > Content
Cold drawn and hot rolled seamless steel pipe process
- Apr 24, 2018 -

Cold drawn and hot rolled seamless steel pipe process

  Cold drawn seamless steel tubes: round tube billet → heating → perforation → head → annealing → pickling → oil (copper plated) → multi-channel cold drawing (cold rolling) → billet Tube → heat treatment → straightening → water pressure test (flaw detection) → mark → warehousing. Hot-rolled (extruded seamless steel tube): round tube billet → heating → perforation → three-roll skew rolling, continuous rolling or extrusion → off pipe → sizing (or reducing) → cooling → billet Tube → straightening → hydrostatic test (or flaw detection) → marking → warehousing.

  Hot rolled seamless steel tubes: round tube billet → heating → perforation → head → annealing → pickling → oil (copper plated) → multi-channel cold drawing (cold rolling) → billet Tube → heat treatment → straightening → water pressure test (flaw detection) → mark → warehousing. Hot-rolled (extruded seamless steel tube): round tube billet → heating → perforation → three-roll skew rolling, continuous rolling or extrusion → off pipe → sizing (or reducing) → cooling → billet Tube → straightening → hydrostatic test (or flaw detection) → marking → warehousing.