Hot-rolled seamless steel ingot is made of perforated or solid tube capillary tube, and then hot rolled steel. Hot-rolled seamless steel tube industry in China has an important position.
Hot-rolled seamless steel tube material is round, after cutting machine processed into 1 m blank, and by conveyor belt to the furnace heating, a temperature of about 1200 degrees Celsius, the fuel is hydrogen or acetylene. Round tube came out after pressure punching machine wear air. After perforation, round tube has been three roll rolling, rolling or extrusion. Squeeze off the tube after sizing. Sizing mill rotating at high speed through a cone drill holes into the billet to form pipe. Pipe diameter from the sizing mill to determine the length of the drill diameter. The pipe sizing after entering the cooling tower through water cooling pipe after cooling, will be straightening.
Steel belt sent by straightening the metal detection machine (or water pressure test) for internal testing. If the pipe internal cracks, bubbles and other problems will be detected. Steel quality even after rigorous hand-selected. Steel quality, the use of spray paint number, size, production batch number. Hanging by a crane into the warehouse.
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