Steel pipe production process and steel pipe classification

Steel Pipe production process and steel pipe classification:
Steel pipe as an important part of steel products, because of its manufacturing process and the use of different shapes of pipe and is divided into Seamless Steel Pipe (round billet) and Welded Steel Pipe (plate, with blank) two categories. (1) seamless steel pipe because of its different manufacturing process, is divided into hot-rolled (extruded) seamless steel pipe and cold drawn (rolling) seamless steel pipe two. Cold drawn (rolling) tube is divided into two kinds of circular tube and shaped tube. A. Overview of the process of hot-rolled (extruded seamless steel pipe): round tube → heating → perforation → three roll rolling, rolling or extrusion → off → sizing (or reducing diameter) → cooling → billet → straightening → water pressure test (or flaw detection) → mark → storage. (Cold-rolled) → billet → heat treatment → straightening → Water pressure test (inspection) → mark → storage.
B. Seamless steel pipe, because of its use is divided into the following varieties: GB / T8162-1999 (structural seamless steel pipe). Mainly used in general structure and mechanical structure. Its representative material (grade): carbon steel 20,45 steel; alloy steel Q345, 20Cr, 40Cr, 20CrMo, 30-35CrMo, 42CrMo and so on. GB / T8163-1999 (Seamless steel pipe for conveying fluid). Mainly used for engineering and large equipment on the delivery of fluid pipelines. On behalf of the material (grade) for the 20, Q345 and so on. GB3087-1999 (low pressure boiler seamless steel pipe). Mainly used for industrial boilers and live boilers transport low and medium pressure fluid pipeline. Representative material for the 10,20 steel. GB5310-1995 (Seamless Steel Tube for High Pressure Boiler). Mainly used for power plants and nuclear power plant boilers on the high temperature, high pressure conveying fluid sets and pipes. Representative material for the 20G, 12Cr1MoVG, 15CrMoG and so on. GB5312-1999 (marine carbon steel and carbon manganese steel seamless steel pipe). Mainly used for ship boilers and superheater with I, II-level pressure tube. On behalf of the material for the 360,410,460 steel grade. GB1479-2000 (Seamless Steel Pipe for High Pressure Fertilizer Equipment).
Mainly used for high-temperature and high-pressure chemical equipment on the pipeline. Representative material for the 20,16Mn, 12CrMo, 12Cr2Mo and so on. GB9948-1988 (Seamless Steel Pipe for Petroleum Cracking). Mainly used in oil smelters boilers, heat exchangers and their transport fluid pipelines. Its representative material for the 20,12CrMo, 1Cr5Mo, 1Cr19Ni11Nb and so on. GB18248-2000 (Seamless Steel Tube for Gas Cylinder). Mainly used for the production of various gas, hydraulic cylinders. Its representative material for the 37Mn, 34Mn2V, 35CrMo and so on. GB / T17396-1998 (hot rolled seamless steel pipe for hydraulic support). Mainly used for the production of coal mine hydraulic support and cylinder, column, and other hydraulic cylinders, columns. Its representative material for the 20,45,27SiMn and so on. GB3093-1986 (High Pressure Seamless Steel Tube for Diesel Engines). Mainly used for diesel engine injection system high pressure tubing. The steel pipe is generally cold drawn tube, its representative material for the 20A. GB / T3639-1983 (cold drawn or cold rolled precision seamless steel pipe).
Mainly used for mechanical structure, carbon pressure equipment used, requiring high dimensional accuracy, good surface finish steel pipe. Its representative material 20,45 steel and so on. GB / T3094-1986 (cold drawn seamless steel pipe profiled steel pipe). Mainly used for the production of various structural parts and parts, the material for the quality of carbon structural steel and low alloy structural steel. GB / T8713-1988 (precision inner diameter Seamless Pipe for hydraulic and pneumatic cylinders). Mainly for the production of hydraulic and pneumatic cylinder with a precision diameter of the cold drawn or cold-rolled seamless steel pipe. Its representative material for the 20,45 steel and so on. GB13296-1991 (stainless steel seamless steel tubes for boilers and heat exchangers). Mainly used for chemical enterprises boilers, superheaters, heat exchangers, condensers, catalytic tubes and so on. With the high temperature, high pressure, corrosion-resistant steel pipe. Its representative material is 0Cr18Ni9,1Cr18Ni9Ti, 0Cr18Ni12Mo2Ti and so on. GB / T14975-1994 (structural stainless steel seamless steel pipe). Mainly used for general structure (hotel, hotel decoration) and chemical enterprise mechanical structure with the resistance to the atmosphere, acid corrosion and a certain strength of the steel pipe. Its representative material is 0-3Cr13, 0Cr18Ni9,1Cr18Ni9Ti, 0Cr18Ni12Mo2Ti and so on. GB / T14976-1994 (stainless steel seamless pipe for fluid delivery). Mainly used for conveying corrosive media. Representative material is 0Cr13, 0Cr18Ni9,1Cr18Ni9Ti, 0Cr17Ni12Mo2,0Cr18Ni12Mo2Ti and so on. YB / T5035-1993 (Seamless Steel Tube for Automotive Axle Shaft). Mainly used for the production of automotive axle casing and axle axle axle with high-quality carbon structural steel and alloy structural steel hot-rolled seamless steel pipe. Its representative material for the 45,45Mn2, 40Cr, 20CrNi3A and so on. API SPEC5CT-1999 (casing and tubing specification), which is compiled and published by American Petreleum Instiute ("API") in the world. Among them: casing: from the ground into the drilling, as the lining of the lining of the pipe, the pipe between the connection through the coupling. The main materials for the J55, N80, P110 and other steel grades, as well as corrosion resistance of hydrogen sulfide C90, T95 and other steel grade. Its low grade (J55, N80) can be welded steel pipe. A pipe that is inserted into the casing from the surface of the casing until the oil layer is connected between the pipes through the coupling or the whole. Its role in the pumping unit will be oil tank oil pipeline to the ground. The main materials for the J55, N80, P110, and anti-hydrogen sulfide corrosion C90, T95 and other steel grade. Its low grade (J55, N80) can be welded steel pipe. API SPEC 5L-2000 (Pipeline Specifications), compiled and published by the American Petroleum Institute, is common in all parts of the world. Pipeline: is the shaft out of the oil, gas or water, through the pipeline to the oil and gas industry enterprises. Pipeline pipe includes two kinds of seamless and welded pipe, the pipe end has a flat end, with threaded end and socket end; its connection for the end of welding, coupling connection, socket connection. The main material for the tube B, X42, X56, X65, X70 and other steel. (2) welded steel pipe welded steel pipe is used in the steel plate or strip, because of its different welding process is divided into furnace welded pipe, welding (resistance welding) pipe and automatic arc welded pipe. Because of the different forms of welding into straight seam welded pipe and spiral welded pipe two. Because of its end shape is divided into circular welded pipe and shaped (square, flat, etc.) welded pipe. Weld pipe due to its different materials and uses are divided into the following varieties: GB / T3091-1993 (low pressure fluid transport with Galvanized Welded Steel Pipe). Mainly used for conveying water, gas, air, oil and heating hot water or steam and other general lower pressure fluid and other use pipe. Its representative material Q235A grade steel. GB / T3092-1993 (galvanized welded steel pipe for low pressure fluid delivery). Mainly used to transport water, gas, air, oil and heating hot water or steam and other general lower pressure fluid and other use of the tube. Its representative material: Q235A grade steel. GB / T14291-1992 (Mine fluid transport welded steel pipe). Mainly used for mine pressure, drainage, shaft gas with straight seam welded steel pipe. Its representative material Q235A, B grade steel. GB / T14980-1994 (Large diameter electric pipe for low pressure fluid delivery). Mainly used for conveying water, sewage, gas, air, heating steam and other low-pressure fluid and other uses. Its representative material Q235A grade steel. GB / T12770-1991 (Stainless steel welded steel pipe for mechanical construction). Mainly used in machinery, automobiles, bicycles, furniture, hotels and hotel decoration and other mechanical parts and structural parts. Its representative material 0Cr13,1Cr17,00Cr19Ni11,1Cr18Ni9,0Cr18Ni11Nb and so on. GB / T12771-1991 (stainless steel welded pipe for fluid delivery). Mainly used for conveying low-pressure corrosive media. Representative material is 0Cr13, 0Cr19Ni9, 00Cr19Ni11, 00Cr17, 0Cr18Ni11Nb, 0017Cr17Ni14Mo2 and so on.