Precision seamless pipe is a kind of high-precision steel pipe material treated by cold drawing or hot rolling. Because the inner and outer walls of the precision steel pipe have no oxide layer, withstand high pressure without leakage, high precision, high finish, no deformation after cold bending, no expansion. Therefore, it is mainly used to produce pneumatic or hydraulic components, such as air cylinders or oil cylinders, which can be seamless pipes or welded pipes. The chemical composition of precision steel pipes includes carbon C, silicon Si, manganese Mn , sulfur S, phosphorus P, chromium Cr, compared with solid steel such as round steel, seamless steel pipe is lighter in weight when the bending and torsional strength is the same. It is an economical section steel and is widely used in the manufacture of structural parts and machinery. Components.

1) Main varieties of precision seamless pipes: DIN series of high-precision precision and bright precision seamless pipes, precision seamless pipes for hydraulic systems, and precision seamless pipes for automobile manufacturing

2) Main standards: DIN2391, DIN2445, EN10305, DIN1629, DIN1630, ASTM A179

3) Main material of precision seamless pipe: ST35(E235) ST37.4 ST45(E255) ST52(E355)

4) Main delivery status: NBK(+N) GBK(+A) BK(+C) BKW(+LC) BKS(+SR)

5) Main features: no oxide layer on the inner and outer walls of the precision seamless tube, no leakage under high pressure, high precision, high finish, no deformation after cold bending, no cracks in flaring and flattening

6) Main uses of precision seamless pipes: used in hydraulic system piping, automobile manufacturing piping, military industry, engineering machinery, railway locomotives, aerospace, ships, injection molding machines, die-casting machines, machine tools, diesel engines, petrochemicals, power plants, boiler equipment, etc. All walks of life.