Seamless pipe – economic cross-section steel pipe
Seamless pipe – economic cross-section steel pipe
What is Seamless pipe – economic cross-section steel pipe?
Seamless pipe is a kind of hollow section, no joints around the perimeter of a long strip of steel. It is widely used as a pipeline for conveying fluids, such as the pipeline for 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 compressive strength and is lighter in weight. It is a kind of economic cross-section steel pipe, which is widely used in the manufacture of structural and mechanical parts, such as oil drill pipe, automobile transmission shaft, bicycle frame and rigid scaffolding used in construction.
Steel pipe is widely used to make ring parts, which can improve the material utilization rate. Steel pipe or a variety of conventional weapons indispensable material, gun barrel, barrel, etc. to steel pipe to manufacture.
Seamless pipe classification
According to the seamless pipe section area shape is different:
Seamless pipes can be divided into round pipes and special-shaped pipes according to the different section area shapes. Since the circle has the largest area when the circumference is equal, more fluid can be transported with a circular pipe. In addition, the annular section under internal or external radial pressure, the force is more uniform, so the vast majority of steel pipe is round.
However, the round pipe also has certain limitations, such as under the condition of plane bending, the round pipe is not as strong as the square pipe and rectangular pipe bending strength, some agricultural machinery skeleton, steel and wood furniture, such as commonly used square pipe and rectangular pipe.
According to different applications:
1.Seamless steel pipe for construction (GBT8162-2008). It is a seamless steel pipe for general structure and mechanical structure.
2. Seamless steel pipes for fluid transport (GB/T8163-2008). It is a seamless pipe used for conveying water, oil, gas and other fluids on engineering and large equipment.
3. Low and medium pressure boiler seamless steel pipe (GB3087-2008) is used for the manufacture of various structures of low and medium pressure boiler superheated steam pipe, boiling water pipe and locomotive boiler superheated steam pipe, smoke pipe, small smoke pipe and arch brick pipe of high quality carbon structural steel hot rolled and cold drawn (rolled) seamless steel pipe.
4. High pressure boiler seamless steel pipe (GB5310-2008) is used for manufacturing high pressure and above the water tube boiler heating surface with high quality carbon steel, alloy steel and stainless heat resistant steel seamless steel pipe.
5. The seamless steel pipe for high pressure fertilizer equipment (GB6479-2000) is a high quality carbon structural steel and alloy steel seamless steel pipe suitable for chemical equipment and pipelines with working temperature of -40~400℃ and working pressure of 10~30Ma.
6. Seamless steel pipes for petroleum cracking (GB9948-2006). It is used in petroleum smelter furnace pipe, heat exchanger and its conveying fluid pipeline.
7. The steel pipe for geological drilling (YB235-70) is a steel pipe for the geological department to carry out core drilling. According to its use, it can be divided into drill pipe, drill collar, core pipe, casing and settling pipe, etc.
8. Seamless steel pipe for diamond core drilling (GB3423-82) is a seamless steel pipe for drill pipe, core rod and casing for diamond core drilling.
9. Oil drilling pipe (YB528-65) is a seamless steel pipe used for internal or external thickening at both ends of oil drilling. There are two kinds of steel pipe parting wire and spare wire. Spare wire pipe is connected with joint, and spare wire pipe is connected with tool joint by butt welding method.
10. Carbon steel and carbon manganese steel seamless steel pipe for Marine (GB/5312-1999) is a carbon steel seamless steel pipe for the manufacture of Marine I class pressure pipe system, II class pressure pipe system, boiler and superheater. The working temperature of carbon steel seamless steel pipe wall shall not exceed 450℃, and the working temperature of alloy steel seamless steel pipe wall shall not exceed 450℃.
11. Seamless steel pipe (GB3088-82) is a hot rolled seamless steel pipe with high quality carbon structural steel and alloy structural steel for manufacturing automotive semi-axle bushing pipe and axle housing pipe of drive axle.
12. High pressure oil pipe for diesel engine (GB3093-86) is a cold-drawn seamless steel pipe for the manufacture of high pressure pipe for diesel injection system.
13. Structural stainless steel seamless steel pipe (GB/T14975-2002) 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 made of hot rolled (extrusion, expansion) and cold drawn (rolled) seamless steel pipe.
14. Seamless stainless steel pipe for fluid transportation (GB/T14976-2002) is a stainless steel pipe made of hot rolled (extruded, expanded) and cold drawn (rolled) seamless steel pipe for fluid transportation.
