Carbon Steel Seamless Pipe 10#, 20# and other low-carbon steel seamless pipes are mainly used for fluid transportation pipelines( such as Oil, Gas ). Seamless pipes made of medium carbon steel such as 45# and 40Cr are used to manufacture mechanical parts, such as the stressed parts of automobiles and tractors. Generally, seamless pipes should be used to ensure strength and flattening tests. 

 Parameter of Seamless steel pipe

Standard of Seamless steel pipe 

National standard steel pipe implementation standard : 

1. Seamless steel pipe for structure: GB8162-2008 ;

2. Seamless steel pipe for conveying fluid: GB8163-2008 ;

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

4. High pressure seamless pipe for boiler: GB5310-2008 (ST45.8-Ⅲ type) ;

5. High-pressure seamless steel pipes 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. Special seamless pipe for oil drill collar: YB691-70 ;

10.Seamless steel pipe for automobile half shaft: GB3088-1999 ;

11.Seamless steel pipe for ships: GB5312-1999 ;

12.Cold-drawn cold-rolled precision seamless steel pipe: GB3639-1999 ;