1 Main production process of hot-rolled seamless steel pipe (main inspection process):

Preparing and Inspection of Tube Billet Heating of Tube Billet Piercing Rolling Reheating of Waste Liquid Tube Fixing (Reducing) Diameter Heat Treatment Straightening of Finished Tube Finishing Inspection (Nondestructive, Physicochemical, Taiwan Inspection) Storage

2 cold rolling (drawing) seamless steel pipe main production process

Blank preparation → pickling lubrication → cold rolling (pull) → heat treatment → straightening → finishing → inspection

Hot rolling seamless steel pipe production process flow chart:

Source: China Metallurgical News Agency

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