Knowledge of rebar engineering: Definition and classification of steel pipes.
2013-12-17
Steel pipeis a type of hollow long steel material, widely used as pipelines for transporting fluids such as oil, natural gas, water, gas, steam, etc. Additionally, it is lighter in weight when bending and torsional strength are the same, so it is also widely used in manufacturing mechanical parts and engineering structures. It is also commonly used to produce various conventional weapons, gun barrels, shells, etc.
Steel pipeClassification:Steel pipeDivided into seamlessSteel pipeand weldedSteel pipe(seamed pipe) two main categories. According to the cross-sectional shape, it can be divided into round pipes and special-shaped pipes; the widely used shape is roundSteel pipe, but there are also some square, rectangular, semicircular, hexagonal, equilateral triangular, octagonal and other special shapesSteel pipe. For those that bear fluid pressureSteel pipe, hydraulic tests must be conducted to check their pressure resistance and quality. They are considered qualified if there is no leakage, wetting or expansion under specified pressure; someSteel pipealso require edge rolling tests, expansion tests, flattening tests according to standards or customer requirements.
SeamlessSteel pipe: SeamlessSteel pipeis made from steel ingots or solid pipe blanks through perforation to form a rough pipe and then processed by hot rolling, cold rolling or cold drawing. The specifications of seamlessSteel pipeare expressed in terms of outer diameter * wall thickness in millimeters. SeamlessSteel pipeis divided into hot-rolled and cold-rolled (drawn) seamlessSteel pipe, two categories. Hot-rolled seamlessSteel pipe, divided into generalSteel pipe, low and medium pressure boilersSteel pipe, high-pressure boilersSteel pipe, alloysSteel pipe, stainless steelSteel pipe, petroleum cracking pipes, geologicalSteel pipe, and others.Steel pipe. Cold-rolled (drawn) seamlessSteel pipe, besides being divided into generalSteel pipe, low-medium pressure boilersSteel pipe, high-pressure boilersSteel pipe, alloysSteel pipe, stainless steelSteel pipe, petroleum cracking pipesSteel pipe, othersSteel pipe, also includes carbon thin-walledSteel pipe, alloy thin-walledSteel pipe, stainless thin-walledSteel pipe, special-shaped.Steel pipeHot-rolled seamless pipes generally have an outer diameter greater than mm with a wall thickness of mm; cold-rolled seamless
The diameter can reach mm with a wall thickness of up to mm; thin-walled pipes can have an outer diameter of up to mm with a wall thickness less than mm; cold-rolled has higher dimensional accuracy than hot-rolled.Steel pipeGenerally used seamlessSteel pipeis made from high-quality carbon structural steels such as MnV low-alloy structural steel or CrMnSi alloy steels through hot rolling or cold rolling. Low-carbon steels like , are mainly used for fluid transport pipelines. Medium-carbon steels like , are used for manufacturing mechanical parts such as load-bearing components in automobiles and tractors. Generally used seamlessSteel pipemust ensure strength and flattening tests. Hot-rolled
Shenyang Tengfei Iron Corporation
Shenyang Tengfei Steel Pipe Co., Ltd.
Address: No.6 A 3, No.13 Road, Economic and Technological Development Zone, Shenyang City, Liaoning Province
E-mail:tfwelcome@163.com
Focus on us
