Seamless steel pipe

Seamless steel pipe is perforated by the whole round steel, the surface of the steel pipe without weld, called seamless steel pipe. According to the production method, seamless steel tube can be divided into hot rolled seamless steel tube, cold rolled seamless steel tube, cold drawn seamless steel tube, extruded seamless steel tube, pipe jacking, etc. According to the shape of section, seamless steel tube is divided into round and special-shaped, special-shaped tube has square, oval, triangle, hexagonal, melon seed, star, winged tube and a variety of complex shapes. The maximum diameter is 900mm and the minimum diameter is 4mm. According to different uses, there are thick wall seamless steel pipe and thin wall seamless steel pipe. Seamless steel pipe is mainly used as petroleum geology drilling pipe, petrochemical cracking pipe, boiler pipe, bearing pipe and automobile, tractor, aviation high-precision structural steel pipe.

Seamless steel pipe is perforated by the whole round steel, the surface of the steel pipe without weld, called seamless steel pipe. According to the production method, seamless steel tube can be divided into hot rolled seamless steel tube, cold rolled seamless steel tube, cold drawn seamless steel tube, extruded seamless steel tube, pipe jacking, etc. Liaocheng Hengye Machinery equipment Co., Ltd. mainly sells seamless steel tubes made of 45# steel, using cold rolling technology to produce seamless steel tubes. General seamless steel tube production process can be divided into cold drawing and hot rolled, cold rolled seamless steel tube production process generally more complicated than hot rolled, three-roll rolling tube billet must first, after the extrusion sizing test, if there is no response after crack on the surface of pipe have to be cut after cutting machine, cutting grow about a meter of billet. Then enter the annealing process, annealing to use acidic liquid pickling, pickling should pay attention to whether there are a lot of bubbling on the surface, if there are a lot of bubbling shows that the quality of the steel pipe can not reach the corresponding standard. The appearance of cold-rolled seamless steel pipe is shorter than that of hot-rolled seamless steel pipe, the wall thickness of cold-rolled seamless steel pipe is generally smaller than that of hot-rolled seamless steel pipe, but the surface looks brighter than that of thick-walled seamless steel pipe, the surface is not too rough, the caliber is not too much burr. The maximum diameter is 900mm and the minimum diameter is 4mm. According to different uses, there are thick wall seamless steel pipe and thin wall seamless steel pipe. Seamless steel pipe is mainly used as petroleum geology drilling pipe, petrochemical cracking pipe, boiler pipe, bearing pipe and automobile, tractor, aviation high-precision structural steel pipe.