Standards and uses of carbon steel pipes

1. Structural carbon steel pipe is a carbon steel pipe for general structure and mechanical structure.

2. carbon steel pipe for fluid transportation is a general carbon steel pipe used to transport water, oil, gas and other fluids.

3. carbon steel pipes for low and medium pressure boilers (GB3087-2008) are used to manufacture superheated steam pipes, boiling water pipes, and superheated steam pipes, large smoke pipes, small smoke pipes and arch bricks for low and medium pressure boilers of various structures. Hot-rolled and cold-drawn (rolled) carbon steel pipes of high-quality carbon structural steel for pipes.

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

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

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

7. The steel pipe for geological drilling (YB235-70) is a 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 according to the purpose.

8. carbon steel pipe for diamond core drilling (GB3423-82) is a carbon steel pipe for drill pipe, core pipe and casing for diamond core drilling.

9. Oil drilling pipe (YB528-65) is a carbon steel pipe used for inner or outer thickening at both ends of oil drilling.

10. Carbon steel carbon steel pipe for ships (GB5312-85)

• China Classification Society Material and Welding Rules – China Classification Society (CCS)
• Det Norske Veritas (DNV) Rules – Det Norske Veritas (DNV)
• Lloyd’s Register (LR) Rules – Lloyd’s Register (LR)
• Germanischer Lloyd (GL) Specifications – Germanischer Lloyd (GL)
• American Bureau of Shipping (ABS) Specifications – American Bureau of Shipping (ABS)
• Bureau Veritas (BV) Specifications – Bureau Veritas (BV)
• Italian Bureau of Shipping (RINA) Specifications – Italian Bureau of Shipping (RINA)
• Nippon Kaisha (NK) Rules – Nippon Kaisha (NK)

It is a seamless carbon steel pipe used 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 carbon steel pipe wall does not exceed 450 ℃, and the working temperature of the alloy steel carbon steel pipe wall exceeds 450 ℃.

11. The carbon steel pipe for automobile axle casing (GB3088-82) is a high-quality carbon structural steel and alloy structural steel hot-rolled carbon steel pipe used in the manufacture of automobile axle casing and drive axle axle casing.

12. Diesel high-pressure oil pipe (GB3093-86) is a cold-drawn carbon steel pipe for manufacturing high-pressure pipes for diesel injection systems.

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

14. Cold-drawn or cold-rolled precision carbon steel pipes (GB3639-83) are cold-drawn or cold-rolled precision carbon steel pipes with high dimensional accuracy and good surface finish for mechanical structures and hydraulic equipment. Use precision carbon steel pipes to manufacture mechanical structures or hydraulic equipment.

15. Structural stainless steel carbon steel pipes (GB/T14975-2002) are hot-rolled ( Extrusion, expansion) and cold drawn (rolled) carbon steel pipes.

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

17. Special-shaped carbon steel pipe is a general term for carbon steel pipes with other cross-sectional shapes other than round pipes. According to the shape and size of the steel pipe section, it can be divided into equal-wall thickness special-shaped carbon steel pipe (code D), unequal wall thickness special-shaped carbon steel pipe (code BD), variable diameter special-shaped carbon steel pipe (code BJ). Shaped carbon steel pipes are widely used in various structural parts, tools and mechanical parts.

18. Seamless steel pipes for low temperature pipelines (GB/T18984-2003) are seamless steel pipes used for low temperature pressure vessel pipelines and low temperature heat exchanger pipelines at the level of -45℃～-195℃.

Generally, carbon steel pipes are made of 10, 20, 30, 35, 45 and other high-quality carbon steel 16Mn, 5MnV and other low-alloy structural steel or 40Cr, 30CrMnSi, 45Mn2, 40MnB and other combined steel hot-rolled or cold-rolled. carbon steel pipes made of low carbon steel such as 10 and 20 are mainly used for fluid transportation pipelines. 45, 40Cr and other medium carbon steel carbon steel pipes are used to manufacture mechanical parts, such as the stressed parts of automobiles and tractors.

Generally, carbon steel pipes are used to ensure strength and flattening tests. Hot-rolled steel pipes are delivered in a hot-rolled state or heat-treated state; cold-rolled steel pipes are delivered in a heat-treated state. carbon steel pipes for low and medium pressure boilers: used to manufacture various low and medium pressure boilers, superheated steam pipes, boiling water pipes, water wall pipes and superheated steam pipes, large smoke pipes, small smoke pipes and arch brick pipes for locomotive boilers.

Hot-rolled or cold-rolled seamless tubes with high-quality carbon structural steel. Mainly made of No. 10 and No. 20 steel, in addition to ensuring chemical composition and mechanical properties, water pressure test, hemming, flaring, flattening and other tests are required. Hot-rolled delivery is in hot-rolled state, and cold-rolled is delivered in heat-treated state.