Generally will have a hollow section, the pipe body is no seam of the long steel called seamless steel pipe. Since the interior of the seamless steel pipe is a hollow section, it is used in a large number of pipes for the delivery of fluids such as oil, natural gas, gas, water or some solid materials. Compared to round steel and other solid steel, bending strength in the same torsion, seamless steel pipe lighter weight, is an economical cross-section steel, is also widely used to produce structural parts and mechanical parts, such as oil Drill pipe, car drive shaft, bicycle frame and construction steel scaffolding.
In addition to the ring made of steel parts, but also increase the utilization of steel, simplify manufacturing processes, cost savings and processing time, ring parts are rolling bearing rings, jack sets, etc., is now produced with steel pipe. Seamless steel pipe is also used to create a variety of conventional weapons indispensable to a material, such as barrels, barrels and so will use seamless steel pipe.
Seamless steel pipe according to the cross-sectional shape of the pipe can also be divided into different shapes and pipes. Because in the circumference of the same conditions, the circle area is the largest, so in order to transport more fluid are generally used in circular seamless steel pipe. And the ring cross section in the internal or external radial pressure, the force is also more uniform, so most of the seamless steel pipe is a pipe.
However, the seamless steel pipe v is also its limitations, when in the plane by the plane bending, square, rectangular steel pipe bending strength greater than the pipe, so some agricultural machinery skeleton, steel and other major furniture Square, rectangular pipe. In addition, according to different uses also have other cross-sectional shape of the special-shaped seamless steel pipe.
The use of seamless steel pipe is very wide, and in response to the use of many scenes, the use of seamless steel pipe made of stainless steel is also very much. Here to introduce the next.
Seamless steel pipes for structural use
Mainly used to produce general structure and mechanical structure. Its representative material: carbon steel 20,45 steel; alloy steel Q345, 20Cr, 40Cr, 20CrMo, 30-35CrMo, 42CrMo and so on.
Seamless steel pipes for fluid delivery
Mainly used for conveying water, oil, gas and other fluids in general seamless pipe. Representative materials are 20, Q345 and so on.
Low and medium pressure boiler seamless pipe
Is used to manufacture all kinds of low and medium pressure boiler superheated steam pipe, boiling water pipe and locomotive boiler with superheated steam pipe, large smoke pipe, small smoke pipe and arch brick with high quality carbon structural steel hot rolling and cold drawing (rolling) Seamlesspipe. Representative material for the 10,20 steel.
Structural stainless steel seamless pipe
Is widely used in chemical, petroleum, textile, medical, food, machinery and other industries of corrosion-resistant pipes and structural parts and parts made of stainless steel hot-rolled (extruded, expanded) and cold drawn (rolling) seamless pipe. Its representative material is 0-3Cr13,0Cr18Ni9,1Cr18Ni9Ti, 0Cr18Ni12Mo2Ti and so on.
Stainless steel seamless pipe for fluid delivery
Is a hot-rolled (extruded, expanded) and cold drawn (rolled) seamless pipe made of stainless steel for conveying fluids. Representative material is 0Cr13, 0Cr18Ni9,1Cr18Ni9Ti, 0Cr17Ni12Mo2,0Cr18Ni12Mo2Ti and so on.
Shaped seamless steel pipe
Which is a general term for a seamless pipe having a cross-sectional shape other than a round pipe seamless steel pipe. According to the different shape and size of the steel pipe can be divided into different thickness of the same type of seamless pipe (code D), ranging from wall thickness profiled seamless pipe (code-named BD), variable diameter shaped seamless pipe (code-named BJ). Shaped seamless pipe is widely used in a variety of structural parts, tools and mechanical parts. Compared with the pipe, the special-shaped pipe generally have a larger moment of inertia and cross-section modulus, a greater bending and torsional ability, can greatly reduce the weight of the structure, saving steel.
Source: China Stainless Steel Pipe Manufacturer – Yaang Pipe Industry Co., Limited (www.yaang.com)