What is the national standard of steel pipe type specification table?

National steel pipe implementation standard:

1. Seamless steel pipe for structure: GB8 162-2008.

2. Connecting steel pipe for conveying fluid: GB8 163-2008.

3. Seamless steel pipe for boiler: GB3087-2008?

4. Seamless high-pressure tubes for boilers: GB 53 10-2008 (ST45.8-III type)?

5. High pressure seamless steel pipe for fertilizer equipment: GB6479- 1999.

6. Seamless steel pipe for geological drilling: YB235-70

7. Seamless steel pipe for oil drilling: YB528-65?

8. Seamless steel pipe for petroleum cracking: GB9948-88?

9. Seamless pipe for oil drill collar: YB69 1-70?

10. Seamless steel pipe for automobile axle: GB3088- 1999?

1 1. Marine seamless steel pipe: GB53 12- 1999?

12, cold-drawn and cold-rolled precision seamless steel pipe: GB3639- 1999?

13, various alloy tubes 16Mn, 27SiMn, 15CrMo, 12CrMov, 20G, 40Cr, 12Cr 1MoV,/kloc-0.

Extended data:

Classification of national standard steel pipes: Seamless steel pipes are divided into two categories: hot-rolled and cold-rolled (drawn) seamless steel pipes.

Hot rolled seamless steel pipes are divided into ordinary steel pipes, medium and low pressure boiler steel pipes, high pressure boiler steel pipes, alloy steel pipes, stainless steel pipes, petroleum cracking pipes, geological steel pipes and other steel pipes.

Cold rolled (drawn) seamless steel pipes include carbon thin-walled steel pipes, alloy thin-walled steel pipes, stainless steel thin-walled steel pipes and special-shaped steel pipes in addition to ordinary steel pipes, medium and low pressure boiler steel pipes, high pressure boiler steel pipes, alloy steel pipes and other steel pipes. Generally, hot-rolled seamless pipes have an outer diameter greater than 32mm and a wall thickness of 2.5-75 mm; The diameter of cold-rolled seamless pipe can reach 6mm, the wall thickness can reach 0.25mm, the outer diameter of thin-walled pipe can reach 5mm, and the wall thickness is less than 0.25mm, so the dimensional accuracy of cold-rolled seamless pipe is higher than that of hot-rolled.

Baidu encyclopedia-international steel tube