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| Outside dia.(mm) | Wall thickness(mm) | Steel grade | Standard | Usage |
| Transmission pipe | Oil casting pipe | Q235, Q345, 20#；L245, X42~X70；H40, J55, K55,etc. | GB/T3091-2008, GB/T9711.1 -1997, GB/T19830-2005；API-5L, API-5CT, ASTM A53, ASTM A589, ASTM A252, etc. | Widly used in oil, natural gas, chemical industry, heating and electric power, structure, water gas, transmission, construction, machinary fields, etc. |
| 114.3 | 3.2-8.7 | 5.21-8.36 | ||
| 139.7 | 6.20-9.17 | |||
| 141.3 | 3.2-9.5 | |||
| 168.3 | 4.0-12.06 | 7.32-12.06 | ||
| 177.8 | 4.5-12.7 | 5.87-12.7 | ||
| 219.1 | 5.0-12.7 | 6.71-12.7 | ||
| 244.5 | 5.0-13.84 | 7.92-13.84 | ||
| 273.1 | 5.2-14.3 | 7.09-13.84 | ||
| 323.9 | 5.2-15.9 | |||
| 339.7 | 5.6-15.9 | 8.38-13.06 | ||
| 355.6 | 5.6-15.9 |
