Seamless steel tube

Application of seamless pipe

Seamless pipes have many uses, which we can also encounter in our daily life, such as seamless pipes used in general structures, seamless pipes for transporting water and gas, seamless pipes used in high-pressure pipelines, seamless pipes for petroleum cracking, etc. the production standards of seamless pipes used in different positions are also different.

Below we list its uses and corresponding standards:

1. Seamless pipes for structures (gb/t8162-2008) are seamless pipes for general structures and mechanical structures.

2. Seamless pipe for fluid transportation (gb/t8163-2008) is a general seamless pipe used to transport water, oil, gas and other fluids.

3. Seamless tubes for low and medium pressure boilers (gb3087-2008) are carbon structural steel hot-rolled and cold drawn (rolled) seamless tubes for manufacturing superheated steam tubes, boiling water tubes for low and medium pressure boilers of various structures and superheated steam tubes, large smoke tubes, small smoke tubes and arch brick tubes for locomotive boilers.

4. Seamless tubes for high pressure boilers (GB5310-2008) are carbon steel, alloy steel and stainless heat-resistant steel seamless tubes used to manufacture heating surfaces of water tube boilers with high pressure and above.

5. High pressure seamless pipes for chemical fertilizer equipment (GB6479-2000) are carbon structural steel and alloy steel seamless pipes suitable for chemical equipment and pipelines with working temperature of -40~400 ℃ and working pressure of 10~30ma.

6. Seamless tubes for petroleum cracking (GB9948-2006) are seamless tubes for furnace tubes, heat exchangers and pipelines in petroleum refineries.

7. Geological drilling steel pipe (yb235-70) is a steel pipe used by geological departments for core drilling. It can be divided into drill pipe, drill collar, core pipe, casing and sedimentation pipe according to its purpose.

8. Seamless pipe for diamond core drilling (gb3423-82) is a seamless pipe for drill pipe, core rod and casing used for diamond core drilling.

9. Oil drilling pipe (yb528-65) is a seamless pipe used for internal or external thickening at both ends of oil drilling. There are two kinds of steel pipes: Turning wire and non turning wire. The turning wire pipe is connected with a joint, and the non turning wire pipe is connected with a tool joint by butt welding.

10. Carbon steel seamless pipe for ships (gb5312-85)

CCS rules for materials and welding - China Classification Society (CCS)

Det Norske Veritas (DNV) Rules - det Norske Veritas (DNV)

Lloyd's register of shipping (LR) code - Lloyd's register of shipping (LR)

GL rules - GL

American Bureau of shipping (ABS) code - American Bureau of shipping (ABS)

Bureau Veritas (BV) code - Bureau Veritas (BV)

Rina rules - Rina

Japan Classification Society (NK) code - Japan Classification Society (NK)

It is a carbon steel seamless pipe for manufacturing class I pressure pipe system, class II pressure pipe system, boiler and Superheater of ships. The working temperature of carbon steel seamless pipe wall shall not exceed 450 ℃, and the working temperature of alloy steel seamless pipe wall shall exceed 450 ℃.

11. Seamless pipe for automotive half axle sleeve (gb3088-82) is a hot-rolled seamless pipe made of carbon structural steel and alloy structural steel for automotive half axle sleeve and drive axle housing.

12. High pressure oil pipe for diesel engine (gb3093-86) is a cold drawn seamless pipe used for manufacturing high pressure pipe of diesel injection system.

13. Precision inner diameter seamless tubes for hydraulic and pneumatic cylinders (GB8713-88) are cold drawn or cold rolled precision seamless tubes with precision inner diameter for the manufacture of hydraulic and pneumatic cylinders.

14. Cold drawn or cold rolled precision seamless tubes (gb3639-83) are cold drawn or cold rolled precision seamless tubes with high dimensional accuracy and good surface finish for mechanical structures and hydraulic equipment. Selecting precise seamless tubes to manufacture mechanical structures or hydraulic equipment can greatly save machining hours, improve material utilization, and improve product quality.

15. Stainless steel seamless pipes for structures (gb/t14975-2002) are hot-rolled (extruded, expanded) and cold drawn (rolled) seamless pipes made of stainless steel that are widely used in corrosion-resistant pipes, structural parts and components in chemical, petroleum, light textile, medical, food, machinery and other industries.

16. Stainless steel seamless pipes for fluid transportation (gb/t14976-2002) are hot-rolled (extruded, expanded) and cold drawn (rolled) seamless pipes made of stainless steel for fluid transportation.

17. Abnormal seamless pipe is the general name of seamless 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 pipe (code D), unequal wall thickness special-shaped seamless pipe (code BD), variable diameter special-shaped seamless pipe (code BJ). Profiled seamless pipes are widely used in various structural parts, tools and mechanical parts. Compared with circular pipes, special-shaped pipes generally have larger moment of inertia and section modulus, and have greater bending and torsion resistance, which can greatly reduce the structural weight and save steel.

18. Seamless steel pipes for low temperature pipelines (gb/t18984-2003) are seamless steel pipes for low temperature pressure vessel pipelines of -45 ℃ ~ -195 ℃ and low temperature heat exchanger pipelines.

[email protected]