Seamless Pipe
The steel pipe has a hollow section and is widely used for conveying fluid pipelines, such as conveying oil, natural gas, gas, water and some solid materials. Compared with solid steel such as round steel, steel pipe has the same bending and torsional strength and lighter weight. It is a kind of economic cross-section steel and is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipe, automobile drive shaft, bicycle frame and steel scaffolding used in construction. Using steel pipe to manufacture ring parts can improve material utilization rate, simplify manufacturing process, save material and processing time, such as rolling bearing ring, jack sleeve, etc. At present, steel pipe has been widely used to manufacture, steel pipe or all kinds of conventional weapons indispensable material, gun barrel, barrel and so on to manufacture steel pipe. Steel pipe can be divided into round pipe and special-shaped pipe according to the shape of cross-sectional area. Since the area of a circle is maximum with equal perimeters, more fluid can be transported with a circular tube. In addition, the annular section under internal or external radial pressure, the force is more uniform, so the vast majority of steel tubes are round.
However, round tube also has certain limitations, such as under the condition of plane bending, round tube is not as good as square and rectangular tube bending strength, some agricultural machinery skeleton, steel and wood furniture, etc., commonly used square rectangular tube. According to the different uses also need to have other section shape of special-shaped steel pipe.
1.Seamless steel pipe for structure (GB/T8162-1999) is used for general structure and mechanical structure of seamless steel pipe.
2. Seamless Steel pipe for fluid transportation (GB/T8163-1999) is used for conveying water, Oil, Gas and other fluids in general seamless steel pipe.
3. Superheated Steam Pipe, boiling water pipe and locomotive boiler superheated steam pipe, big smoke pipe, small smoke pipe and arch brick pipe pipe of high quality carbon structural steel hot car and cold drawn (rolled) seamless steel pipe.
4.Seamless steel tubes for high pressure boiler (GB5310-1995) are high quality carbon steel, alloy steel and stainless heat resistant steel seamless steel tubes used in the manufacture of high pressure and above pressure water tube boiler heating surface.
5.High pressure seamless steel pipe for chemical fertilizer equipment (GB6479-200) is suitable for the working temperature of -40-~400G C, working pressure of 10~30Ma chemical equipment and pipes of high quality carbon structural steel and alloy steel seamless steel pipe. Seamless steel tubes for petroleum cracking (GB9948-88) are suitable for furnace tubes, heat exchange and pipelines of petroleum refineries.
6. Seamless steel tubes for petroleum cracking (GB9948-88) are suitable for furnace tubes, heat exchange and pipelines of petroleum refineries
7.Geological drilling steel pipe (YB235-70) used for core drilling by geological departments. It can be divided into drill pipe, drill collar, core pipe, casing pipe and precipitate pipe.
8.Seamless steel pipe for diamond core drilling (GB3423-82) is used for diamond core drilling drill pipe, core rod, casing seamless steel pipe.
9.Oil drilling pipe (B528-65) is a seamless steel pipe used for both ends of oil drilling inside or outside thickening. Steel pipe can be divided into two kinds: turning wire and non-turning wire. Turning wire pipe is connected with joint, and non-turning wire pipe is connected with tool joint by butt welding.
10.Shipboard contact carbon steel seamless steel pipe (GB213-85) is a seamless carbon steel pipe used in the manufacture of l class pressure pipe system, II class pressure pipe system, boiler and superheater. The working temperature of seamless carbon steel pipe wall shall not exceed 450°C, and that of seamless alloy steel pipe wall shall exceed 450°C.
11.Seamless steel pipe for automobile axle sleeve pipe (GB3088-82) is made of high quality carbon structural steel and alloy structural steel hot rolled seamless steel pipe for automobile axle sleeve pipe and drive axle housing pipe.
12.High pressure tubing for diesel engine (GB3093-2002) is a seamless cold drawn steel tube used for high pressure pipe of diesel engine injection system.
13.Seamless steel tubes with precision inner diameter for hydraulic and pneumatic cylinders (GB8713-88) are cold-drawn or cold-rolled precision seamless steel tubes with precision inner diameter for hydraulic and pneumatic cylinders.
14.Cold drawn or cold rolled precision seamless steel tube (GB3639-2000) is used in the mechanical structure, hydraulic equipment of high dimensional accuracy and surface finish good cold drawn or cold rolled precision seamless steel tube choose precision seamless steel tube manufacturing mechanical structure or hydraulic equipment, etc., can greatly save the machining time, improve material utilization, at the same time to improve the quality of the product.
15.Stainless steel seamless steel tube for structural use (GB/T14975-2002) is widely used in chemical, petroleum, textile, medical, food, machinery and other industries corrosion resistant pipes and structural parts of stainless steel made of hot rolled (extrusion, expansion) and cold drawn (rolled) seamless steel tube.
16.Seamless stainless steel pipe for fluid transportation (GB/T14976-2002) is made of stainless steel for fluid transportation of hot rolled (extruded, expanded) and cold drawn (rolled) seamless steel pipe.
17.Special-shaped seamless steel pipe is a general term for seamless steel pipe with other cross section shapes except circular pipe. According to the different shape and size of steel pipe section, it can be divided into equal wall thickness special-shaped seamless steel pipe (code D), unequal wall thickness special-shaped seamless steel pipe (code BD), variable diameter special-shaped seamless steel pipe (code B). Special-shaped seamless steel tubes are widely used in various structural parts, tools and machinery parts.Compared with circular tubes, special-shaped tubes generally have larger moment of inertia and section modulus. It has greater bending and torsion resistance, which can greatly reduce the structure weight. Save steel.
