Fluid Pipe
For oil and gas transmission and other fluid transfer
Product description
● Standard
GB/T8163-2009 ASTM A53M ASTM A106 Main steel grades: 10, 20, B grade
● Uses
For oil and gas transmission and other fluid transfer
● Size deviation
Steel Tube Types | Tube size mm | Allowable deviation | ||
Common Grade | High Grade | |||
Hot rolled tube | Outer diameter D | All | ± 1% (minimum is ± 0.50mm) | — |
Wall thickness S | All | +15%-12.5% (minimum +0.45/ -0.40 mm) | — | |
Cold-drawn tube | Outer diameter D | 6 ~ 10 | ± 0.20 mm | ± 0.15 mm |
＞ 10 ~ 30 | ± 0.40 mm | ± 0.20 mm | ||
＞ 30 ~ 50 | ± 0.45 mm | ± 0.30 mm | ||
＞ 50 | ± 1% | ± 0.8% | ||
Wall thickness S | ≤ 1 | ± 0.15 mm | ± 0.12 mm | |
＞ 1 ~ 3 | +15%-10% | +12.5%-10% | ||
＞ 3 | +12.5%-10% | ± 10% | ||
Note: Can also be supplied with deviations according to ASTM standards
● Chemical composition, mechanical properties
Standard | Steel grade | Chemical composition (%) | ||||||
C | Mn | Si | Cr | Ni | Cu | P.S | ||
GB/T8163 | 10 | 0.07～0.13 | 0.35～0.65 | 0.17～0.37 | ≤ 0.15 | ≤ 0.30 | ≤ 0.25 | ≤ 0.030 |
20 | 0.17～0.23 | 0.35～0.65 | 0.17～0.37 | ≤ 0.25 | ≤ 0.25 | ≤ 0.25 | ≤ 0.030 | |
Q345 | 0.12～0.20 | 1.20～1.60 | 0.20～0.55 |
|
|
| ≤ 0.030 | |
Mechanical properties | Tensile strength (MPa) | Yield Strength (MPa) | Elongation (%) | |||||
10 | 335～475 | ≥ 205 | ≥ 24 | |||||
20 | 410～550 | ≥ 245 | ≥ 20 | |||||
Q345 | 490～665 | ≥ 325 | ≥ 21 | |||||