Seamless Steel Pipes , because of their different purposes and are divided into a number of varieties :

GB/T8162- 1999 (the use of the pipes). Mainly used for general structure and mechanical structures. Their material (brands) : carbon steel 20, 45 steel; Steel Q345, 20Cr, 40Cr. 20CrMo ,30 - 35CrMo, 42CrMo other.

 

GB/T8163-1999 (Seamless transmission fluid). Mainly used for large-scale projects and equipment carrier fluid pipeline. Representative materials (brands) 20, such as Q345 GB - 1999 (low and medium pressure boiler seamless Steel Pipes ). Used mainly for industrial boilers and boiler life transmission fluid low-pressure pipelines. Representative materials for the 10, 20 steel.

 

GB5310-1995 (high-pressure seamless steel tube boiler). Used mainly in power station boilers, nuclear power plants and high temperature, high pressure transmission fluid collection bins and pipelines. Representative materials for the 20 G, 12Cr1MoVG, such 15CrMoG.

 

GB5312-1999 (ships with steel and carbon manganese steel seamless Steel Pipes ). Used mainly for ships and makes use of overheated boiler and I, Level II pressurized tube. Representative materials for the 360, such as the 410,460 steel. GB1479-2000 (high-pressure seamless steel pipes used fertilizer equipment). Major equipment for use in fertilizer high temperature and high pressure fluid transmission pipeline. Representative materials for the 20, 16Mn, 12CrMo, 12Cr2Mo other.

 

GB9948 - 1988 (oil cracking seamless pipe). Smelter mainly used for oil boilers, heat exchangers and transmission fluid. Their material to 20, 12CrMo, 1Cr5Mo, 1Cr19Ni11Nb other. GB18248-2000 (Seamless cylinders). Mainly for the production of gas, hydraulic cylinders. His representative material for 37 Mn, 34Mn2V, such 35CrMo. GB/T17396-1998 (hydraulic prop hot rolling seamless steel tubes). Mainly for the production of coal and hydraulic support cylinder and columns, and other hydraulic cylinder and columns. Their material to 20, 45,27 of dual other. GB3093-1986 (Diesel used high-pressure seamless steel tubes). Mainly used for high-pressure diesel injection system tubing. Pipe its general drawing tube, and its representative for 20 A material. GB/T3639-1983 (drawing or cold precision seamless tube). Mainly used for mechanical structure, carbon pressure equipment to use, requiring high dimensional accuracy and surface finish good pipe. Their material 20, 45 Steel. GB/T3094-1986 (Profiled drawing Seamless Steel Tube Pipe). Main structure for the production of various pieces and parts, made of high-quality carbon steel and low alloy steel.

 

GB/T8713-1988 (hydraulic and pneumatic cylinder using precision seamless Steel Pipes  diameter). Mainly used for the production of hydraulic and pneumatic cylinder with the diameter size of precision drawing or cold-rolled seamless steel pipes. His representative material for 20, 45 Steel. GB13296-1991 (boiler, stainless steel seamless steel pipes heat exchangers). Mainly for the chemical industry enterprises boiler, superheater, heat exchangers, condensers, catalytic, and so on. The high temperature, high pressure, corrosion of steel pipes. Their material 0 Cr18Ni9, 1Cr18Ni9Ti. 0Cr18Ni12Mo2Ti other.

 

GB/T14975-1994 (stainless steel seamless steel pipes structure). Mainly used for general structure (hotels and restaurants decorative), and chemical enterprises mechanical structure of the atmospheric resistance, acid corrosion is a certain intensity and the pipe. His representative material for 0-3Cr13, 0Cr18Ni9, 1Cr18Ni9Ti. 0Cr18Ni12Mo2Ti other.

 

GB/T14976-1994 (fluid transmission stainless steel seamless steel tubes). Mainly used for the transportation of corrosive media representatives pipeline material to 0 Lancing, 0Cr18Ni9. 1Cr18Ni9Ti, 0Cr17Ni12Mo2, 0Cr18Ni12Mo2Ti other.

 

YB/T5035-1993 (automobile axle housing seamless pipe). Mainly for the production of automobile axle housing and Axle Shell axis effective high quality carbon steel and alloy steel seamless hot-rolled Steel Pipes . Their material to 45, 45Mn2, 40Cr, 20CrNi3A other. Casing : up under the surface by drilling, as a wall lining the Steel Pipe , the Steel Pipe  through the coupling between connected. The main material for the J55, N80, P110, such as steel and hydrogen sulfide corrosion resistance C90, 95 of such steel. Low grade steel (J55, N80) for welded steel pipe. Tubing : up to the surface until the casing, insert the Steel Pipe , oil, through the pipe,between the collar or the overall link. Its role will therefore Pumping oil through the pipeline transportation of oil to the ground. The main material for the J55, N80, P110, and hydrogen sulfide corrosion resistance C90, 95 of such steel. Low grade steel (J55, N80) for welded steel pipe. Pipeline : axis is the ground of oil, gas or water, through the Pipeline Transportation of oil and gas enterprises. Pipeline including seamless and welded pipe, pipe-terminal end, and screw terminal for export terminal; Its connections to End welding, Coupling Link, Dip connections. The main pipe material B, X-42, with X56, X65, X70 grade steels. (2) welded Steel Pipes  welded steel pipe is used in billet steel strip, or because of different welding process includes furnace pipe, MACHINE (resistance) control and automatic arc welded pipe. Because of the different forms of welding Longitudinal divided into two and spiral welded pipe. End because of the shape is divided into circular welded pipe and dysplasia (side-bian) pipe. Pipe and uses their material is divided into different varieties.