Stainless steel welded pipe production technology, raw materials, article points, welded pipe, heat treatment, correct, straightening, fix the end, pickling, water pressure test, inspection (spurts India) - packaging - shipments
Cold-drawn (rolling) seamless steel pipe: round tube blank → heating → perforation → heading → annealing → pickling → oiling (copper plating)→ multi-pass cold drawing (cold rolling)→ Blank tube → Heat treatment → straightening → water pressure
Test (flaw detection)→ marking → storage.
Hot rolling (extruded seamless steel pipe) : round tube blank → heating → perforation → three-roll diagonal rolling, continuous rolling or extrusion → Stripping → sizing (or reducing)→ Cooling → blank tube → straightening → water pressure
Test (or flaw detection)→ marking → storage.
1. Hot rolling: The refined stainless steel alloy is hot rolled, and the steel is gradually thinned to form the required thickness through continuous rolling at high temperature.
2. Pickling: The surface of the steel after hot rolling may have a layer of oxide, which can be removed by pickling to make the surface smoother.
3. Cold rolling: Cold rolling is formed by further rolling hot rolled steel at room temperature.