Alloy Steel Pipes And Tubes The Classification Of The Situation

 Alloy Steel Pipes And Tubes Classification of alloy pipes

(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.

Alloy Steel Pipes And Tubes A. Overview of the process

Hot-rolled (extruded seamless steel pipe): round tube heating perforation three-roll skew rolling, rolling or extrusion off-tube sizing (or reducing diameter) cooling billet straightening pressure test (or flaw detection) mark the storage.

(Cold - rolled) billet heat treatment straightening pressure test (flaw detection) mark the storage. () () () () () () () () () () () ()

B. Seamless steel pipe, because of its use is divided into the following varieties:

GB / T8162-2008 (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 / T8163-2008 (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.

GB3087-2008 (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.

GB5310-2008 (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.

GB6479-2000 (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.

GB9948-2006 (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.

Alloy Steel Pipes And Tubes

GB / T17396-2007 (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 / T3639-2007 (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 / T3094-1999 (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.