Cold rolling seamless steel tube do a method of cold rolling and cold drawing with steel tube produced by hot rolling or hot extrusion as blank. It has the advantages of high precision, good strength, good surface finish and wide size range.

 

Cold rolled seamless steel pipe process

 

The production process of cold drawn seamless steel tube is: round tube blank → heating → piercing → heading → annealing → pickling → oiling (copper plating) → multi pass cold drawing (cold rolling) → blank tube → heat treatment → straightening → hydrostatic test (flaw detection) → marking → warehousing.