Seamless black steel pipe has hollow section, which is widely used to transport fluid, such as oil, natural gas, gas, water and some solid materials. Compared with solid steel such as round steel, steel tube is a kind of economic section steel with light weight when its bending and torsional strength are the same. It is widely used to manufacture structural parts and mechanical parts, such as oil drill pipe, automobile transmission shaft, bicycle frame, steel scaffold used in construction and other steel tubes to make circular parts, which can improve the utilization rate of materials, simplify the manufacturing process, save materials and Processing time, such as rolling bearing ring, jack sleeve, etc., has been widely used to manufacture steel pipes. Steel pipe is also an indispensable material for all kinds of conventional weapons. Steel pipe is used to manufacture barrel and barrel. According to the different cross-sectional shapes, steel pipes can be divided into circular pipes and special-shaped pipes. Because the circle area is the largest under the condition of the same circumference, more fluid can be transported by the circular tube. In addition, when the circular section bears the internal or external radial pressure, the force is relatively uniform. Therefore, the vast majority of steel pipes are circular pipes.
However, there are some limitations tube, as at the receiving plane bending, not as good as square tube, rectangular tube large flexural strength, the skeleton of some farm machinery, steel and wood furniture on common square, rectangular pipe. The use of different shaped pipe should also have other cross-sectional shapes.
Standard:JIS, DIN, ASTM, GB, API
Standard2:JIS G3454-2007, JIS G3452-2004, DIN 1629/4, DIN EN 10217-1-2005, ASTM A1020-2002, ANSI A213-2001, GB 13296-2007, GB 18248-2000, API 5L
Grade Group:A53-A369, 10MoWVNb, Cr-Mo alloy
Grade:A335 P5, A179-C, 10MoWVNb, 30CrMo
Outer Diameter(Round):25 - 720 mm
Thickness:4 - 75 mm
Surface Treatment:black painted
Special Pipe:API Pipe
Product name:Seamless black Steel Pipe
End protector:Plastic Pipe Cap
seamless steel pipe Application: seamless steel pipe is a kind of economic section steel, which plays an important role in the national economy. It is widely used in petroleum, chemical industry, boiler, power station, ship, machinery manufacturing, automobile, aviation, aerospace, energy, geology, architecture and military industry.
1. Buildings: most of them are transported by underground pipelines, underground water is extracted when building, hot water is transported by boilers, etc.
2. Machining, bearing sleeve, machining mechanical accessories, etc.
3. Electrical: gas transmission, water power generation fluid pipeline.
4. Anti static pipe of wind power plant, etc.
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