Analysis of different types of spiral steel pipe

A spiral steel pipe is a long strip of steel with a hollow section and no seams around it. The steel pipe has a hollow section and is widely used as a pipeline for transporting fluids, such as pipelines for transporting oil, natural gas, gas, water, and certain solid materials. Compared with solid steel such as round steel, the steel pipe is lighter in weight when the bending and torsional strength is the same. It is an economical cross-section steel and is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes, automobile transmission shafts, and bicycles. Frames and steel scaffolding used in building construction, etc. The use of steel pipes to manufacture ring parts can improve the utilization rate of materials, simplify the manufacturing process, save materials, and processing man-hours, such as rolling bearing rings, jack sets, etc., which have been widely used in steel pipes. Steel pipe is also an indispensable material for various conventional weapons, and barrels, barrels, etc. must be made of steel pipes. Steel pipes can be divided into round pipes and special-shaped pipes according to the shape of the cross-sectional area. Due to the condition that the circumference is equal, the area of the circle is smaller, and more fluid can be transported with a circular tube. In addition, when the ring section is subjected to internal or external radial pressure, the force is relatively uniform, so most steel pipes are round pipes.

However, round pipes also have certain limitations. For example, under the condition of plane bending, round pipes are not as strong as square and rectangular pipes in bending strength. Some agricultural machinery skeletons, steel and wood furniture, etc. often use square and rectangular pipes. According to different purposes, special-shaped steel pipes with other cross-sectional shapes are also required.

1. Structural spiral steel pipes (GB/T8162-1999) are spiral steel pipes used for general structures and mechanical structures.

2. Spiral steel pipe for fluid transportation (GB/T8163-1999) is a general spiral steel pipe used to convey fluids such as water, oil, and gas.

3. Spiral steel pipes for low and medium-pressure boilers (GB3087-1999) are used to manufacture superheated steam pipes for low and medium-pressure boilers of various structures, boiling water pipes, and superheated steam pipes for locomotive boilers, large smoke pipes, small smoke pipes and arch brick pipes High-quality carbon structural steel hot-rolled and cold-drawn (rolled) spiral steel pipes.

4. Spiral steel pipes for high-pressure boilers (GB5310-1995) are high-quality carbon steel, alloy steel, and stainless heat-resistant steel spiral steel pipes for the heating surface of water tube boilers for high pressure and above.

5. High-pressure spiral steel pipe for fertilizer equipment (GB6479-2000) is a high-quality carbon structural steel and alloy steel spiral steel pipe suitable for chemical equipment and pipelines with a working temperature of -40~400°C and a working pressure of 10~30Ma.

6. Spiral steel pipe for petroleum cracking (GB9948-88) is a spiral steel pipe suitable for furnace tubes, heat exchangers, and pipes in petroleum refineries.

7. Steel pipes for geological drilling (YB235-70) are steel pipes used for core drilling by geological departments and can be divided into drill pipes, drill collars, core pipes, casing pipes, and sedimentation pipes according to their uses.

8. Spiral steel pipe for diamond core drilling (GB3423-82) is a spiral steel pipe used for drill pipe, core rod, and casing for diamond core drilling.

9. Oil drilling pipe (YB528-65) is a spiral steel pipe that is thickened internally or externally at both ends of oil drilling. There are two types of steel pipes: threaded and non-threaded. The threaded pipes are connected with joints, and the non-threaded pipes are connected with tool joints by butt welding.

10. Carbon steel spiral steel pipe for ships (GB5213-85) is a carbon steel spiral steel pipe for the manufacture of Class I pressure-resistant piping systems, Class II pressure-resistant piping systems, boilers, and superheaters. The working temperature of the carbon steel spiral steel pipe wall does not exceed 450°C, and the working temperature of the alloy steel spiral steel pipe wall exceeds 450°C.

11. Spiral steel pipes for automobile half-shaft casings (GB3088-82) are high-quality carbon structural steel and alloy structural steel hot-rolled spiral steel pipes for manufacturing automobile half-shaft casings and drive axle housing shaft pipes.

12. High-pressure oil pipes for diesel engines (GB3093-2002) are cold-drawn spiral steel pipes used to manufacture high-pressure pipes for diesel engine injection systems.

13. Precision inner-diameter spiral steel pipes for hydraulic and pneumatic cylinders (GB8713-88) are cold-drawn or cold-rolled precision spiral steel pipes with precise inner diameters for the manufacture of hydraulic and pneumatic cylinders.

14. Cold-drawn or cold-rolled precision spiral steel pipe (GB3639-2000) is a cold-drawn or cold-rolled precision spiral steel pipe with high dimensional accuracy and a good surface finish for mechanical structures and hydraulic equipment. The use of precision spiral steel pipes to manufacture mechanical structures or hydraulic equipment can greatly save machining hours, improve material utilization, and help improve product quality.

15. Stainless steel spiral steel pipes for structural use (GB/T14975-2002) are hot-rolled (extruded) stainless steel pipes and structural parts and parts widely used in chemical, petroleum, textile, medical, food, machinery, and other industries. , expansion) and cold-drawn (rolled) spiral steel pipe.

16. Stainless steel spiral steel pipes for fluid transportation (GB/T14976-2002) are hot-rolled (extruded, expanded) and cold-drawn (rolled) spiral steel pipes made of stainless steel for fluid transportation.

17. Special-shaped spiral steel pipe is a general term for spiral steel pipes with cross-sectional shapes other than round pipes. According to the shape and size of the steel pipe section, it can be divided into special-shaped spiral steel pipes with equal wall thickness (code-named D), special-shaped spiral steel pipes with different wall thickness (code-named BD), and special-shaped spiral steel pipes with variable diameters (code-named BJ). Special-shaped spiral steel pipes are widely used in various structural parts, tools, and mechanical parts. Compared with round pipes, special-shaped pipes generally have a larger moment of inertia and section modulus, and have greater bending and torsion resistance, which can greatly reduce the structural weight and save steel.