LSAW Steel Pipe

　 　1, Tube heating 　　The average heating to stop the rapid rise and fall of temperature. To adhere to a smooth landing every time the temperature slowly, the temperature does not exceed the maximum landing 30 ℃. 　　2, Mandrel mill 　　The average wall thickness of the thick-walled tubes and solid billets, so that the probability of a significant reduction in the mandrel bending deformation, can be useful for the progress of the wall thickness precision steel pipe . 　　 3, Precision of the mandrel 　　Mandrel outer precision control at ± 0.1mm, straight degrees mandrel deflection does not exceed 5mm. Welding, finishing pierce a pin positioned between two sections of the mandrel, in order to avoid the formation of solder total straightness deviation is too large. 　　 4, Perfect process 　　Perfect process, to avoid the center and pull the thin wall thickness by Haou transcend the limitations of the control condition seizures, progressive wall thickness accuracy. 　 　5, Centering ro...

　　 Precision steel pipe is a kind of steel pipe that inside and outside of the wall are without oxidation layer, withstand high pressure without leakage, high precision, high finish, cold bending is not deformed, flaring, flattening no cracks and so on. The main advantage of seamless precision steel tube is characterized by a smaller diameter, high precision, high precision, good surface quality, better performance, more dense metal. It has strict requirements on the pipe body bore, the outer wall size and the tolerance and roughness. Seamless precision steel pipe is mainly used for mechanical structure, hydraulic equipment, hydraulic and pneumatic cylinder manufacturing. 　　The characteristic of seamless precision steel tube: 　　1. Finished tube size accuracy, internal and external diameter can be accurate to within 0.05mm. 　　2. Internal and external surface finish is good. 　　3. There is no oxide film on the inner and outer surfaces of the precision tube after cold rolling. 　...

　　High precision cold drawn steel pipe is a new type of high-tech energy-saving product. In recent years, the technology used in the production of precision steel pipes has been widely used in the domestic hydraulic, pressure cylinder, coal mine support (pillar), oil pump pipe, Jack and other manufacturing fields. The high precision cold drawn precision steel pipe is important to popularize the use of saving steel, improving machining efficiency, saving energy, and reducing investment in hydraulic cylinder and cylinder processing equipment. 　　Cold drawing method: producing high-precision cold drawn pipe, compared with traditional cutting technology, the hydraulic cylinder has the following characteristics: 　　(1) the production efficiency is high: the traditional production method of the cylinder with an inner diameter of 420 millimeters and a length of 12 meters is 154 hours, and the cold drawing process takes only 4 minutes. 　　(2) high positive rate: rolling head boring, play a ...