The production method is divided into hot rolling, hot extrusion and cold drawing (rolling) stainless steel pipe.
According to the different microstructure of stainless steel semi-ferritic semi-martensitic stainless steel pipe, martensitic stainless steel pipe, austenitic stainless steel pipe, austenitic - ferric iron stainless steel pipe, etc.
Production process:
Hot rolling (extrusion Seamless Steel Tube) : round tube billet → heating → perforation → three-high cross rolling, continuous rolling or extrusion → pipe removal → sizing (or reducing) → cooling → straightening → hydraulic test (or flaw detection) → marking → storage
Cold drawn (rolled) seamless steel pipe: round tube billet → heating → perforation → head → annealing → pickling → oiling (copper plating) → multi-pass cold drawing (cold rolling) → billet tube → heat treatment → straightening → hydraulic test (crack detection) → marking → storage
Stainless Steel Tubes including following Steel Grade:
Nickel Alloy Grade:
N02200/2201, N04400, N06600, N06601, N06625, N06852, N06219, N06690, N08800/8810/8811, N08825, N08028, N08535, N08904, N08925, N08926, N010276, N06022, etc.
304/304L, 316/316L, 314, 321, 347H, 316Ti, 316LMod, 317L/N, 310S, 253MA, 330, 904L, S31254, XM-19, etc
S31803, S32304, S31500, S32550, S32750, S32760, etc.
Stainless Steel 304 Pipes,Stainless Steel Pipe Fittings,Seamless Stainless Steel Pipe,Seamless Stainless Steel Tube
TORICH INTERNATIONAL LIMITED , https://www.steeltubepipechina.com