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lined pipe, clad pipes, induction bends, Pipe Fittings - Piping System Solutions

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June 7, 2025

Carbon steel seamless pipe

Carbon steel seamless pipe

by admin / Wednesday, 28 February 2018 / Published in Technology

Carbon steel seamless pipe is a kind of long steel. Steel Pipe has a hollow cross-section, a large number of pipelines used for conveying fluids, such as oil, natural gas, gas, water and some solid materials pipelines.
Steel pipe and solid steel, such as the strength of the flexural torsion, the same time, light weight, is an economic section of steel, widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipe, automobile transmission shaft, bicycle racks and construction of steel scaffolding, etc.
Making annular parts with steel pipe can improve material utilization, simplify manufacturing process, save material and working hours, such as rolling bearing ring, Jack sleeve, etc., which is now widely used in steel pipe manufacture. Steel pipe or a variety of conventional weapons indispensable materials, barrel, barrel, etc. to be made of steel pipe. The steel pipe can be divided into round pipe and irregular pipe according to the cross-sectional area shape. Due to the same circumference, the circle area is the largest, with a circular tube can transport more fluids.
In addition, the Ring section is subjected to internal or external radial pressure, the force is more uniform, therefore, the vast majority of steel pipe is round pipe.
Making annular parts with steel pipe can improve material utilization, simplify manufacturing process, save material and working hours, such as rolling bearing ring, Jack sleeve, etc., which is now widely used in steel pipe manufacture.
Divided into 10# seamless steel tubes, 20# seamless steel tubes, 45# seamless steel tubes. Seamless steel tube with hollow section, a large number of pipelines used for conveying fluids, such as oil, natural gas, gas, water and some solid materials pipelines.
Compared with solid steel, such as steel pipe, the flexural and torsional strength is the same, and the weight is lighter, which is an economic section steel.
Widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipe, automobile transmission shaft, bicycle racks and steel scaffolding used in building construction, such as the production of annular parts, can improve material utilization, simplifying manufacturing processes, saving materials and processing hours, has been widely used in steel pipe manufacturing. The mechanical property of steel is an important index to ensure the final use of steel, which depends on the chemical composition and heat treatment system.

In the steel pipe standard, according to the different use requirements, the tensile properties (tensile strength, yield intensity or yield point, elongation) as well as hardness, toughness index, and user requirements of high and low temperature performance. Seamless steel tubes are divided into hot-rolled and cold-rolled (dial) seamless steel tubes. Hot-rolled seamless steel pipe, low and medium pressure boiler pipe, high-pressure boiler pipe, alloy steel pipe, stainless steel pipe, petroleum cracking pipe, geological steel pipe and other steel pipe. Cold rolled (dial) seamless steel tube, in addition to general steel pipe, low medium pressure boiler pipe, high-pressure boiler pipe, alloy steel pipe, stainless steel pipe, petroleum cracking pipe, other steel pipe, but also includes carbon thin-walled steel pipe, alloy thin-walled steel pipe, stainless steel thin-walled steel pipe, profiled pipe
Hot-rolled seamless pipe diameter is generally greater than 32mm, wall thickness 2.5-75mm, cold rolled seamless pipe diameter can be to 6mm, wall thickness can be 0.25mm, thin-walled tube diameter can be to 5mm wall thickness is less than 0.25mm, cold-rolled than hot-rolled size precision. The general use of seamless steel pipe is used 10#, 20#, 30#, 35#, 45# and other high-quality carbon steel 16Mn, 5MnV and other low-alloy structural steel or 40Cr, 30CrMnSi, 45mn2, 40MnB, such as steel hot-rolled or cold-rolled. Seamless steel tubes made of 10#, 20#, etc. are mainly used in fluid conveying pipelines. 45, 40Cr and other carbon steel made of seamless pipe used to make mechanical parts, such as automobiles, tractors, the force of parts. General use of seamless steel tube to ensure strength and flattening test.
The hot-rolled steel pipe is delivered in hot rolling or heat treatment condition. Hot-rolled seamless steel tube, as the name suggests, the temperature of the rolled pieces is high, so the deformation resistance is small, can achieve large deformation. Taking the rolling of steel plate as an example, the thickness of continuous casting slab is about 230mm, and after roughing and fine rolling, the final thickness is 1~20mm. At the same time, because of the small size of the steel plate, the dimension precision is relatively low, it is not easy to appear the problem of flatness, to control the convexity. The microstructure and mechanical properties of strip steel can be controlled by controlling rolling temperature, finish rolling temperature and crimp temperature in order to achieve the requirements of the Organization.

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