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Generally speaking, the Carbon Steel Seamless Pipe production process can be divided into cold drawn and hot-rolled two kinds. Carbon Steel Seamless Pipe production process: 1.hot-rolled Carbon Steel Seamless Pipe production process (main inspection process):
Tube billet preparation and inspection → tube billet heating → perforation → tube → pipe reheating → fixed (minus) diameter → heat treatment → finished pipe straightening → finishing → inspection (nondestructive, physical and chemical, inspection) → Warehousing
2. cold-rolled (drawing) Carbon Steel Seamless Pipe production process:
Blank preparation → pickling lubrication → cold rolling (drawing) → heat treatment → straightening → finishing → inspection
Cold-rolled Carbon Steel Seamless Pipe production process is generally more complex than hot-rolled, the first tube billet to carry out the three-roll, squeeze after the sizing test, if the surface does not respond to the cracks after the circular tube cutting machine to cut into a length of about one meter of the billet. And then into the annealing process, annealing to use acid liquid for pickling, pickling should pay attention to whether there is a large number of foaming, if there is a large number of blistering production of steel pipe quality can not reach the corresponding standards. The appearance of cold-rolled seamless steel tubes to be shorter than hot-rolled seamless steel tubes, cold-rolled seamless steel tube wall thickness than hot-rolled seamless steel tube to small, but the surface looks more bright than thick-walled seamless steel tubes, the surface is not too rough, the caliber is not too much burr.