Petroleum Refining Pipe (Cracking)
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| No. | Grade | Specification | Executive Standard | ||
| Outer Diameter/mm | Wall Thickness /mm | Economical Length /m | |||
| 1 | 10, 20 | 10 ~ 127 | 1 ~ 20 | 6 ~ 12.0 | GB 948 |
| 42 ~ 114.3 | 3.5 ~ 12 | 6 ~ 12.2 | |||
| 114.3 ~ 180 | 3.8 ~ 22 | 6 ~ 12.2 | |||
| 68 ~ 254 | 10 ~ 55 | 6 ~ 12.2 | |||
| 140 ~ 368 | 6 ~ 42 | 6 ~ 12.2 | |||
| 318 ~ 720 | 14 ~ 120 | 4 ~ 12.5 | |||
| 2 | 12CrMo, 15CrMo | 10 ~ 127 | 1 ~ 20 | 6 ~ 12.0 | GB 9948 |
| 42 ~ 114.3 | 3.5 ~ 12 | 6 ~ 12.2 | |||
| 114.3 ~ 180 | 3.8 ~ 22 | 6 ~ 12.2 | |||
| 68 ~ 254 | 10 ~ 55 | 6 ~ 12.2 | |||
| 140 ~ 368 | 6 ~ 42 | 6 ~ 12.2 | |||
| 318 ~ 720 | 14 ~ 120 | 4 ~ 12.5 | |||
| 3 | 1Cr5Mo | 10 ~ 127 | 1 ~ 20 | 6 ~ 12.0 | GB 9948 |
| 42 ~ 114.3 | 3.5 ~ 12 | 6 ~ 12.2 | |||
| 114.3 ~ 180 | 3.8 ~ 22 | 6 ~ 12.2 | |||
| 68 ~ 254 | 10 ~ 55 | 6 ~ 12.2 | |||
| 140 ~ 368 | 6 ~ 42 | 6 ~ 12.2 | |||
| 318 ~ 720 | 14 ~ 120 | 4 ~ 12.5 | |||
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