Material Of Seamless Steel Pipe

1. general purpose seamless steel pipe is rolled from ordinary carbon structural steel, low alloy structural steel or alloy structural steel according to the material. For example, seamless pipes made of low carbon steel such as No.10, No.20, etc. are mainly used as pipelines for the transportation of steam, coal gas, liquefied gas, natural gas, various petroleum products and various other gases or liquids; seamless pipes made of medium carbon steel such as No.45, No.40 Cr, etc. are mainly used for the manufacture of various machine fittings and pipeline fittings.

2. Seamless pipes for general purposes are also divided into those supplied according to the chemical composition and mechanical properties, and those supplied by the water pressure test. Seamless steel tubes subjected to fluid pressure should be guaranteed to pass the hydraulic test.

3. Seamless tubes for special purposes are used for boilers, geological exploration, bearings, acid resistance and so on. Such as petroleum geological drilling pipe, petrochemical cracking pipe, boiler pipe, bearing pipe, and high-precision structural steel pipe for automobile, tractor, aviation.

• Structural seamless steel pipe, mainly used for general structure and mechanical structure. Its representative materials (grades): carbon steel 20, 45 steel; alloy steel Q345, 20Cr, 40Cr, 20CrMo, 30-35CrMo, 42CrMo and so on.
• Seamless steel pipe for conveying fluids, mainly used in engineering and large-scale equipment for conveying fluid pipelines. The representative materials (grades) are 20, Q345 and so on.
• Seamless steel pipe for low and medium pressure boiler, mainly used in industrial boiler and life boiler pipeline for conveying low and medium pressure fluid. The representative material is 10, 20 steel.
• Seamless steel pipe for high pressure boiler is mainly used for high temperature and high pressure transportation fluid container and pipeline in power station and nuclear power station boiler. The representative materials are 20G, 12Cr1MoVG, 15CrMoG and so on.
• Carbon steel and carbon manganese steel seamless steel pipe for ship use, mainly used for ship boilers and superheaters with I, II level pressure-resistant tubes and so on. The representative materials are 360, 410, 460 steel grade, etc.
• Seamless steel pipe for high pressure chemical fertilizer equipment, mainly used for chemical fertilizer equipment to transport high temperature and high pressure fluid pipeline. The representative materials are 20, 16Mn, 12CrMo, 12Cr2Mo and so on.
• Seamless steel pipe for petroleum cracking is mainly used for boiler, heat exchanger and its conveying fluid pipeline in petroleum smelting plant. The representative materials are 20, 12CrMo, 1Cr5Mo, 1Cr19Ni11Nb and so on.
• Seamless steel pipe for gas cylinder is mainly used for making various gas and hydraulic cylinders. The representative materials are 37Mn, 34Mn2V, 35CrMo and so on. Hot rolled seamless steel pipe for hydraulic pillar, mainly used for making hydraulic support and cylinder and column for coal mine, as well as other hydraulic cylinder and column. Its representative materials are 20, 45, 27SiMn and so on.

• High pressure seamless steel pipe for diesel engine, mainly used for diesel engine injection system high pressure oil pipe. The tubes are generally cold drawn and the representative material is 20A.
• Cold drawn or cold rolled precision seamless steel tubes are mainly used for mechanical structure, carbon pressure equipment, requiring high dimensional accuracy and good surface finish. Its representative material 20, 45 steel, etc.
• Cold-drawn seamless steel tubes shaped steel tubes, mainly used for making various structural components and parts, whose materials are high-quality carbon structural steel and low alloy structural steel.
• Hydraulic and pneumatic cylinder with precision inner diameter seamless steel tube, mainly used for making hydraulic and pneumatic cylinder with precision inner diameter size of the cold-drawn or cold-rolled seamless steel tube. Its representative materials are 20, 45 steel, etc..
• Boiler, heat exchanger with stainless steel seamless steel pipe, mainly used in chemical enterprises, boilers, superheater, heat exchanger, condenser, catalytic tubes and so on. Used for high temperature, high pressure, corrosion-resistant steel pipe. Its representative materials are 0Cr18Ni9, 1Cr18Ni9Ti, 0Cr18Ni12Mo2Ti and so on.
• Stainless steel seamless pipe for structure. Mainly used for general structure (hotel, restaurant decoration) and chemical enterprise mechanical structure with atmospheric, acid corrosion and has a certain strength of the steel pipe. Its representative materials are 0-3Cr13, 0Cr18Ni9, 1Cr18Ni9Ti, 0Cr18Ni12Mo2Ti and so on.
• Stainless steel seamless pipe for fluid transportation, mainly used for pipelines conveying corrosive media. The representative materials are 0Cr13, 0Cr18Ni9, 1Cr18Ni9Ti, 0Cr17Ni12Mo2, 0Cr18Ni12Mo2Ti and so on.
• Automobile half shaft casing seamless steel pipe, mainly used in the production of automobile half shaft casing and drive axle casing axle tube with high quality carbon structural steel and alloy structural steel hot rolled seamless steel pipe. The representative materials are 45, 45Mn2, 40Cr, 20CrNi3A and so on.