TEL: 0635-8672456
Contact us
TEL: 0635-8672456
E-MAIL: service@0769fy.com

Steel tube classification method

pipe as an important component of iron and steel products, due to its manufacturing process, and the tube shapes are divided into seamless tubes (round) and welded steel (sheet, strip) in two categories.


      due to its manufacturing process, is divided into hot-rolled (squeeze) seamless steel tubes and drawing (rolling) seamless steel pipe in two ways. Drawing (rolling) tubes consists of a circular tube and shaped tubes in two.


   a. Process overview


    hot-rolled (squeeze seamless steel tubes): round tube perforation → → → heated three-roll cross rolling, continuous rolled or extruded-cannula → sizing (or reducing) steel tube straightening → → → → cooling water pressure test (or testing) → tags → storage.


    drawing (rolling) seamless steel pipe: round tube perforated → heat → → → → start → annealing pickling oil (copper) → multi-pass drawing (cold rolled) steel tube heat treatment straightening → → → → hydrostatic test (testing) → tags → storage.


   b. Seamless steel tube, because of their use, are divided into several varieties:


     GB/T8162-1999 (structure with seamless steel tubes). Mainly used for general structure and mechanical structures. His representative material (brands): carbon steel, 20, 45th; steel Q345, 20Cr, 40Cr, 20CrMo, 30-35CrMo, 42CrMo, etc.


     GB/T8163-1999 (transmission fluid seamless steel tubes). Mainly used for projects and large devices transmission fluid pipes. Representative material (grade) was 20, Q345, etc.


     GB3087-1999 (low/middle-pressure boiler seamless steel tubes). Mainly used in industrial boilers and boiler low pressure fluid in pipes. Representative material for steel, 10, 20th.


     GB5310-1995 (high pressure boiler seamless steel tubes). Mainly used in power stations and nuclear power plant boiler high temperature, high pressure transmission fluid-headers and pipes. Representative material for 20G, 12Cr1MoVG, 15CrMoG, etc.


GB5312-1999 (ships with carbon steel and carbon manganese steel seamless steel tubes). Mainly used for marine boilers and overheating I, II-level pressure pipe and so on. Representative material is 360, 410, 460, grade, etc.


GB1479-2000 (high-pressure fertilizer pipe). Mainly used in chemical fertilizer equipment for high temperature and high pressure fluid pipes. Representative material for 20, 16Mn, 12CrMo, 12Cr2Mo, and so on.


     GB9948-1988 (seamless steel tubes for petroleum cracking). Mainly used in oil refinery boiler, heat exchanger and its transmission fluid pipes. His representative material for 20, 12CrMo, 1Cr5Mo, 1Cr19Ni11Nb, and so on.


     GB18248-2000 (cylinders with seamless steel tubes). Mainly used in the production of gas, hydraulic cylinders. His representative material for 37Mn, 34Mn2V, 35CrMo etc.


     GB/T17396-1998 (hot rolled seamless steel pipes for hydraulic props). And mainly for the production of coal mine hydraulic support cylinder, cylinder, hydraulic cylinder, and other columns. His representative material for 20, 45, 27SiMn.


GB3093-1986 (diesel engine with high-pressure seamless steel tubes). Mainly used for injection system of diesel engine high pressure tubing. The steel for cold-drawn pipe, his representative material for 20A.


     GB/T3639-1983 (cold-drawn or cold-rolled precision seamless steel tubes). Pressure equipment mainly used in mechanical construction, carbon, requiring high dimensional accuracy, surface finish and good pipe. His representative material such as 20, 45.


     GB/T3094-1986 (cold-drawn seamless steel pipes shaped steel tube). Mainly used in the production of structural components and parts, made of high quality carbon steel and low alloy steel.


     GB/T8713-1988 (precision for hydraulic and pneumatic cylinder diameter seamless steel tubes). Mainly used for the production of hydraulic and pneumatic cylinder with precision for dimension of inner diameter of cold-drawn or cold-rolled seamless steel tubes. His representative material for 20, 45 steel.


     GB/T14976-1994 (fluid transport stainless steel seamless steel tubes). Mainly used for transportation of corrosive media pipeline. Representative material for 0Cr13, 0Cr18Ni9, 1Cr18Ni9Ti, 0Cr17Ni12Mo2, 0Cr18Ni12Mo2Ti, etc.


     YB/T5035-1993 (seamless steel tube for automobile axle casing). Mainly used in production of automobile half shaft sleeve and driven bridge shell axis effective quality carbon structural steel and hot-rolled structural alloy steel seamless steel pipe. His representative material for 45, 45Mn2, 40Cr, 20CrNi3A, and so on.


     API SPEC5CT-1999 (casing and tubing norms), is a United States Petroleum Institute (American Petreleum Instiute, referred to as the "API") prepare and publish in general around the world. Where: casing: from the surface into the drilling, as the wall lining of the pipe, connected by coupling between the tubes. Main material for J55, N80, P110, grade, and C90, T95, anti-corrosion of steel grade. Low grade (J55, N80) can be welded steel tubes. Tubing: inserted into the casing until the surface layer of the pipe, by coupling between the tubes or connections. Its role and pumping oil reservoir through the tubing into the ground. Main material for J55, N80, P110, C90, T95, anti-corrosion of steel grade. Low grade (J55, N80) can be welded steel tubes.


     API SPEC 5L-2000 (line pipe), is the United States prepared and released by the API, and in general all over the world.


      line pipe: is oil the shaft out of the ground, air or water, transported by pipeline to the oil and gas industry. Pipeline include both seamless and welded tubes, the tube end is flat, threaded and socket ends; its connection to end weld, coupling connections, socket connections, and so on. The tubes are mainly made of b, X42, X56, X65, X70 and other steel grades.

BACK

Copyright 0769fy.com, All rights reserved  E-mail: service@0769fy.com