What is the production process of seamless steel pipe?

The production process of seamless steel pipe can be generally divided to hot rolling, and cold rolling.
The production process of hot rolling pipe: billet preparation and checking - pipe billet heating - punch - pipe rolling - diameter steel pipe heating again - set or reduce diameter - heat treatment - the finished pipe straightening to finishing, inspection, nondestructive, physics and chemistry, detection and warehousing.

The production process of cold rolling pipe: cold-rolling (drawing) seamless steel pipe production processes: blank ready to lubrication pickling, cold rolling (drawing) - heat treatment - straightening to finishing and inspection.