What is the production process of API 5L X42 seamless steel pipe?
The production process of API 5L X42 seamless steel pipe is different according to its production mode.

1. Hot rolling (extruded API 5L X42 seamless steel pipe):
Round tube billet → heating → piercing → three roll cross rolling, continuous rolling or extrusion → pipe stripping → sizing (or reducing) → cooling → straightening → hydrostatic test (or flaw detection) → marking → warehousing 2. Cold drawing (rolling) API 5L X42 seamless steel pipe: round billet → heating → piercing → heading → annealing → pickling → oiling (copper plating) → multi pass cold drawing (cold rolling) → billet tube → heat treatment → straightening → hydrostatic test (flaw detection) → marking → warehousing.

2. Cold rolled (drawn) API 5L X42 seamless steel pipe:
Blank preparation → pickling and lubrication → cold rolling (drawing) → heat treatment → straightening → finishing → inspection.