Seamless steel pipe according to the use of different, there are thick seamless pipe and thin-walled seamless pipe. Seamless steel pipe is widely used.
1, the general purpose seamless steel pipe according to the material, by ordinary carbon structural steel, low alloy structural steel or alloy steel rolling. For example, No. 10, No. 20 and other low carbon steel seamless pipe, mainly used for steam, gas, liquefied gas, natural gas, various petroleum products and a variety of other gases or liquids pipeline; 45, 40Cr and other carbon steel manufacturing seamless pipe, mainly used to manufacture various machine parts and pipe fittings.
2, general purpose seamless steel pipe is also divided by chemical composition and mechanical properties of supply, according to the water pressure test supply. Seamless steel pipes subjected to fluid pressure shall be guaranteed to pass the hydrostatic test.
3, special purpose seamless tube for boiler, geological exploration, bearing, acid and so on. Such as petroleum geological drilling pipe, petrochemical cracking pipe, boiler pipe, bearing pipe and automobile, tractor, aviation with high-precision structural steel pipe.
Structural seamless steel pipe, mainly for general structure and mechanical structure. Its representative material (brand): carbon steel 20, 45 steel; Alloy steels Q345, 20Cr, 40 Cr, 20CrMo, 30-35CrMO, 42CrMe, etc.
Seamless steel pipe for conveying fluid is mainly used in engineering and large equipment for conveying liquid pipeline. Representative material (grade) for 20, Q345, etc.
Low and medium pressure boiler seamless steel pipe, mainly used for industrial boiler and life boiler low and middle pressure fluid pipeline. It is made of steel 10 and 20.
High-pressure boiler seamless steel pipe, mainly used in power stations and nuclear power plants boiler high temperature, high pressure fluid delivery box and pipeline. Typical materials are 20G, 12Cr1MoVG, 15CrMoG, etc.
Marine carbon steel and carbon manganese steel seamless pipe, mainly used for marine boiler and superheater I, II grade pressure pipe. Representative material for 360, 410, 460 steel grade.
High-pressure fertilizer equipment seamless steel pipe, mainly used in fertilizer equipment high temperature and high pressure fluid pipeline. Representative materials for 20, 16 Mn, 12CrMo, 12CR2Mo and so on.
Seamless steel pipe for petroleum cracking is mainly used for boiler, heat exchanger and fluid pipeline in petroleum smeltery. The representative materials are 20, 12CrMo, 1Cr5Mo and 1Cr19Ni11Nb, etc.
Seamless steel pipe for gas cylinder, mainly used for making various gas and hydraulic gas cylinder. Its representative materials are 37Mn, 34Mn2V, 35CrMo and so on.
The hot-rolled seamless steel pipe for hydraulic prop is mainly used for making coal mine hydraulic support, cylinder, column and 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 high-pressure oil pipe of diesel injection system. Its steel pipe is generally cold drawn pipe, its representative material is 20A.
Cold-drawn or cold-rolled precision seamless steel pipe, mainly used for mechanical structure, carbon pressure equipment, requiring high dimensional accuracy, good surface finish of steel pipe. Its representative material 20, 45 steel and so on.
Cold drawn seamless steel pipe special-shaped steel pipe, mainly used for the production of various structural parts and components, its material for high-quality carbon structural steel and low alloy structural steel.
The precision inner diameter seamless steel pipe for hydraulic and pneumatic cylinder is mainly used to make the precision inside diameter of the cold drawn or cold rolled seamless steel tube for hydraulic or pneumatic cylinder. Its representative material is 20, 45 steel and so on.
Stainless steel seamless steel tubes for boiler and heat exchanger are mainly used in boiler, superheater, heat exchanger, condenser and catalytic tube of chemical enterprise. Used for high temperature, high pressure, corrosion resistant steel pipe. Its representative materials are 0Cr18Ni9, 1Cr18Ni-9Ti, 0Cr18 Ni12Mo2Ti and so on.
Stainless steel seamless steel pipe for structure. Mainly used for general structure (hotel, restaurant decoration) and chemical enterprise mechanical structure with atmospheric, acid corrosion and a certain strength of steel pipe. Its representative materials are 0-3Cr13, 0Cr18Ni9, 1Cr18NI9Ti, 0cr18Ni12Mo2Ti and so on.
Fluid transport with stainless steel seamless pipe, mainly for the transport of corrosive media pipeline. The representative materials are 0Cr13, 0Cr18Ni9, 1Cr18 Ni9Ti, 0cr17 Ni12Mo2 and 0Cr18 Ni 12Mo2Ti.
The seamless steel pipe for automobile axle shaft sleeve is mainly used to make the high-quality carbon structural steel and alloy structural steel hot-rolled seamless steel tube for the automobile axle sleeve and the drive axle shell shaft tube. Its representative materials are 45, 45Mn2, 40Cr, 20CrNi3A, etc.
What is the difference between seamless pipe and seamless pipe?
From the process, seamless pipe is a rolling molding, with round steel heating, perforation, hot rolling, sizing, straightening out the production.
Seamless steel pipe is also called welded steel pipe referred to as welded pipe, steel plate or steel belt bending deformation to welding, there are straight welded pipe and spiral welded pipe can be clearly seen welded reinforcement, seamless steel tube is not.
Some of the seamless steel pipe has to do without welding reinforcement, careful observation can be seen traces.
Seamless steel pipe pressure in about 10, higher. Slotted pipe can be used for low pressure fluid, seamless pipe for high pressure (different materials according to specifications).
Seamless steel pipe is mainly used in construction; Seamless steel pipe is mainly used for machining, fluid transport. Seamless steel pipe in all aspects of the basic application are stronger than the slotted steel pipe. Seamless steel pipe prices than the high seam pipe.