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1. Seamless steel pipe for structural use (GB/T8162-1999) is a seamless steel pipe for general structure and mechanical structure
2. Seamless steel pipe for fluid transportation (GB/T8163-1999) is a general seamless steel pipe for conveying fluids such as water, oil, gas, etc.
3. Seamless steel tubes for low and medium pressure boilers (GB3087-1999) are used to manufacture various types of low and medium pressure boiler superheated steam pipes, boiling water pipes and superheated steam pipes for boilers, large smoke pipes, small smoke pipes and arch bricks. High-quality carbon structural steel for hot rolling and cold drawing (rolling)
4. Seamless steel tubes for high-pressure boilers (GB5310-1995) are high-quality carbon steel, alloy steel and stainless heat-resisting seamless steel tubes for the heating surface of water-tube boilers used for the production of high pressure and higher pressures.
5. High-pressure seamless steel pipe for chemical fertilizer equipment (GB6479-86) is a high-quality carbon structural steel and alloy steel seamless pipe suitable for chemical equipment and pipelines with working temperature of -40~400°C and working pressure of 10~30Ma.
6. Seamless Steel Pipe for Petroleum Cracking (GB9948-88) is a seamless steel pipe for furnace tubes, heat exchangers and pipes in petroleum refining plants.
7. Seamless Steel Pipe for Geological Drilling (YB235-70) is a seamless steel pipe used by the geological department for core drilling. It can be divided into drill pipe, drill collar, core pipe, casing and sedimentation pipe etc. according to the purpose.
8. Seamless Steel Pipe for Diamond Core Drilling (GB3423-82) is a seamless pipe for drilling, core and casing of diamond core drilling.
9. Oil drilling pipe (YB528-65) is used to thicken or thicken the seamless steel pipe at both ends of the oil drilling. The two types of seamless steel pipe are the sub-wire and the non-wire. The wire pipe is connected with the joint. Pipe butt welding method and tool joint coupling
10. Carbon steel seamless steel tubes for ships (GB5213-85) are carbon steel seamless steel tubes for the production of ships' Class I pressure piping systems, Class II pressure piping systems, boilers and superheaters. Operating temperature does not exceed 450 °C, alloy steel seamless pipe wall temperature exceeds 450 °C
11. Seamless Steel Tube for Automotive Axle Bushing (GB3088-82) is a high-quality carbon structural steel and alloy structural steel hot-rolled seamless steel tube for the manufacture of automotive axle bushings and axle tubes for drive axle axles.
12. The high-pressure fuel pipe for diesel engines (GB3093-86) is a cold drawn seamless steel pipe for the manufacture of high pressure pipes for diesel injection systems.
13. Precision inner diameter seamless steel tubes for hydraulic and pneumatic cylinders (GB8713-88) is a precision drawn or cold rolled precision seamless steel tube with precision inner diameter dimensions for the manufacture of hydraulic and pneumatic cylinders.
14. Cold-drawn or cold-rolled precision seamless steel tubes (GB3639-83) are used for mechanical structures, hydraulic equipment, high dimensional accuracy and good surface finish cold-drawn or cold-rolled precision seamless steel tubes used precision seamless steel tube manufacturing machinery structure Or hydraulic equipment, etc., can greatly reduce the mechanical processing time, improve the utilization of materials, and at the same time help improve product quality.
15. Structural use (GB/T14975-1994) is hot-rolled (extruded, expanded) made of stainless steel that is widely used for corrosion-resistant pipes and structural parts and components in the chemical, petroleum, textile, medical, food, and machinery industries. And cold drawing (rolling) seamless seamless steel pipe
16. Stainless Steel Seamless Pipe for Fluid Conveyance (GB/T14976-1994) is a hot rolled (extruded, expanded) and cold drawn (rolled) seamless steel pipe made of stainless steel for conveying fluids.
17. Special-shaped seamless steel pipe is in addition to the round pipe other cross-sectional shape of the seamless steel pipe in accordance with the overall shape of the seamless steel pipe cross-sectional shape can be divided into different thickness profiled seamless steel pipe (code D), inequality Thick deformed seamless steel pipe (codenamed BD) and variable diameter special-shaped seamless pipe (code name BJ)
Shaped widely used in various structural parts, tools and mechanical parts Compared with round tubes, shaped tubes generally have larger moments of inertia and section modulus, have greater resistance to bending and torsion, can greatly reduce the weight of the structure Saving steel
51 steel pipe network to provide: seamless steel pipe types and uses
51 steel pipe network to provide: seamless steel pipe types and uses Seamless steel pipe is open at both ends and has a hollow section, its length and the surrounding relatively large steel, according to the production method can be divided into seamless steel pipe and welded seamless steel pipe, no The specification of the seam steel pipe is expressed in terms of external dimensions (such as outside diameter or side length) and wall thickness, and its size range is very wide, from capillary with small diameter to large diameter pipe with several meters in diameter. Seamless steel tubes can be used in pipelines, thermal equipment, machinery industries, petroleum geology exploration, vessels, chemical industry and special applications. Common materials for the seamless steel pipe: 10# 20# 35# 45# K55 37Mn 30CrMo 43CrMo 30GrMo 27simn 12cr1mov 15crmo 42crmo Q345 Q345B Q345D Seamless steel tubes have a hollow section and are used in large quantities to transport fluids such as oil and gas. Compared with solid steel such as round steel, seamless steel pipes such as pipes for gas, water, and certain solid materials have a lighter weight when subjected to the same torsional and torsional strength, and are economical cross-section steels widely used for manufacturing structural parts. The use of seamless steel pipes for mechanical parts such as oil drill pipes, automobile transmission shafts, bicycle frames, and steel scaffolds for construction purposes to manufacture annular parts can improve material utilization, simplify manufacturing processes, and save material and machining man hours, such as rolling bearings Ferrules, jack sets, etc., are now widely used seamless steel pipe to manufacture seamless steel tubes or indispensable materials for various conventional weapons. The barrels, barrels, etc. shall be seamless steel tubes to produce seamless steel tubes in cross-sectional shape. The difference can be divided into round tubes and shaped tubes. Because the circumference is the same, the area of ​​the circle is the largest and can be conveyed by round tubes. More fluid In addition, the ring section is subjected to more uniform forces when subjected to internal or external radial pressures. Therefore, most seamless steel tubes are round tubes. However, circular tubes also have certain limitations, such as bending in the plane. Under the conditions, the circular tube is not as strong as the square tube and the rectangular tube, and some special-shaped seamless steel tubes with other cross-sectional shapes are also needed for the common use and rectangular steel tubes for some agricultural machinery skeletons and steel wood furniture.