In rare steel pipe seamless steel pipe with high quality coil after passing reinspection the slitting or with volume automatically forming and welding, remove the inside and outside of the steel pipe glitch in the computer control of the best fusion temperature, non-destructive testing of qualified overall oxidation atmosphere heated to 910 ℃ -950 ℃ degrees baked, in addition to the multi-pass rolling scales through the stretch reducing mill, the steel pipe throughout the microstructure, grain state, geometry and mechanical properties fully homogeneous. [1] perform API SPEC 5L, API SPEC 5CT, EN10217 standard. The products are widely used in flammable and non-flammable fluid pipes and boilers, steel structure. Seamless steel pipe, also known as hot-rolled seamless steel or hot-rolled steel. Seamless steel pipe seamless Production Pipe important to reducing tension tension-reducing process is a continuous rolling process of the hollow base material without mandrel. Pipe welding quality conditions to ensure that the mother, welded pipe tension reducing process welded pipe as a whole is heated to 950 degrees Celsius, and then by reducing tension (tension reducing machine a total of 24 times) rolled into outside finished tube diameter and wall thickness, the use of this process is the production of hot-rolled steel pipe substantial difference to the ordinary high frequency welded pipe, the microstructure and mechanical properties of the welds and parent through the heat of the furnace to reach full consensus addition makes steel pipe dimensional accuracy, especially the roundness of the pipe body and the wall thickness of accuracy) is superior to similar seamless pipe reducer rolling initiative dominated by multi-channel tension. Realms of the world's developed production fluid tubes, boiler tubes, a large number of taken welded pipe seamless process, with the development of society, the domestic hot-rolled welded pipe seamless pipe the situation is gradually replacing the already formed. This is not to deceive consumers fakes, but depending on the device need steel pipe, seamless steel pipe between of pure seamless and welded pipe, quality is better than welded pipe, cost less than pure seamless, is an ideal alternative products. seamless steel pipe material 10, 20 #, 35 #, 45 #, 20G, 40Cr, 20Gr, 16Mn-45Mn, 27SiMn, Cr5Mo, 12CrMo (T12), 12Cr1MoV 10CrMo910, T91, 15CrMo, 35CrMo 40CrMo seamless steel pipe specifications diameter mm 38-57-76-89 - 108-133-159 - mm diameter 219-720mm thickness 18-40mm seamless steel pipe characteristics: uniform wall thickness, the implementation of standards GB / T8163-2008, the length of the cut to length, the state has allowed the use of low and medium pressure boiler.