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Nominal size DN mm | Nominal pressure grade Mpa | Average inner diameter mm | Minimum wall thickness of lining mm | Minimum wall thickness of outer protective layer mm | The minimum wall thickness of composite pipe is mm | Minimum storage bending radius mm |
17 | 32 | ≥17 | 2 | 2 | 6 | 300 |
25 | 32 | ≥25 | 3 | 2 | 7.5 | 400 |
| 25 | ≥25 | | | 6.5 | 400 |
| 20 | ≥25 | | | 6 | 400 |
| 16 | ≥25 | | | | 400 |
| 12 | ≥25 | | | 5.5 | 400 |
| 2.5 | ≥25 | | | | 400 |
40 | 32 | ≥40 | 3.5 | 3 | 13 | 550 |
| 25 | ≥40 | | | 11 | 550 |
| 20 | ≥40 | | | 10.5 | 550 |
| 16 | ≥40 | | | 10 | 550 |
| 12 | ≥40 | | | 9.5 | 550 |
| 6.4 | ≥40 | | | 8.5 | 550 |
| 2.5 | ≥40 | | | 8.5 | 550 |
50 | 32 | ≥50 | 4 | 3 | 16.5 | 600 |
| 25 | ≥50 | | | 13 | 600 |
| 20 | ≥50 | | | 11.5 | 600 |
| 16 | ≥50 | | | 10 | 600 |
| 12 | ≥50 | | | 9.5 | 600 |
| 6.4 | ≥50 | | | 8.5 | 600 |
| 2.5 | ≥50 | | | 8.5 | 600 |
60 | 25 | ≥60 | 5 | 3 | 16 | 750 |
| 20 | ≥60 | | | 14 | 750 |
| 16 | ≥60 | | | 12.5 | 750 |
| 12 | ≥60 | | | 12 | 750 |
| 6.4 | ≥60 | | | 10 | 750 |
| 2.5 | ≥60 | | | 9.5 | 750 |
65 | 25 | ≥65 | 5.5 | 3 | 16 | 850 |
| 20 | ≥65 | | | 14 | 850 |
| 16 | ≥65 | | | 12.5 | 850 |
| 12 | ≥65 | | | 12 | 850 |
| 6.4 | ≥65 | | | 10 | 850 |
| 2.5 | ≥65 | | | 9.5 | 850 |
75 | 25 | ≥75 | 5.5 | 3 | 16.5 | 900 |
| 20 | ≥75 | | | 14 | 900 |
| 16 | ≥75 | | | 13 | 900 |
| 12 | ≥75 | | | 12 | 900 |
| 6.4 | ≥75 | | | 10 | 900 |
| 2.5 | ≥75 | | | 9.5 | 900 |
80 | 25 | ≥80 | 6 | 3 | 18 | 950 |
| 20 | ≥80 | | | 16 | 950 |
| 16 | ≥80 | | | 14.5 | 950 |
| 12 | ≥80 | | | 12.5 | 950 |
| 6.4 | ≥80 | | | 10.5 | 950 |
| 2.5 | ≥80 | | | 10 | 950 |
85 | 25 | ≥85 | 6 | 3 | 18.5 | 950 |
| 20 | ≥85 | | | 16 | 950 |
| 16 | ≥85 | | | 14.5 | 950 |
| 12 | ≥85 | | | 13 | 950 |
| 6.4 | ≥85 | | | 10.5 | 950 |
| 2.5 | ≥85 | | | 10 | 950 |
90 | 20 | ≥90 | 6 | 3 | 16.5 | 950 |
| 16 | ≥90 | | | 14.5 | 950 |
| 12 | ≥90 | | | 13 | 950 |
| 6.4 | ≥90 | | | 10.5 | 950 |
| 2.5 | ≥90 | | | 10 | 950 |
100 | 16 | ≥100 | 7.5 | 3 | 18.5 | 1050 |
| 12 | ≥100 | | | 17 | 1050 |
| 10 | ≥100 | | | 16.5 | 1050 |
| 8 | ≥100 | | | 14.5 | 1050 |
| 6.4 | ≥100 | | | 12.5 | 1050 |
| 4 | ≥100 | | | | 1050 |
| 2.5 | ≥100 | | | 11 | 1050 |
125 | 12 | ≥125 | 8 | 3.5 | 18.5 | 1200 |
| 10 | ≥125 | | | 17.5 | 1200 |
| 8 | ≥125 | | | 15.5 | 1200 |
| 6.4 | ≥125 | | | 14.5 | 1200 |
| 4 | ≥125 | | | | 1200 |
| 2.5 | ≥125 | | | 13.5 | 1200 |
150 | 10 | ≥150 | 9.5 | 3.5 | 22.5 | 1600 |
| 6.4 | ≥150 | | | 16.5 | 1600 |
| 4 | ≥150 | | | | 1600 |
| 2.5 | ≥150 | | | 14 | 1600 |
170 | 6.4 | ≥170 | 9.5 | 3.5 | 21 | 2300 |
| 4 | ≥170 | | | 18 | 2300 |
| 2.5 | ≥170 | | | 16.5 | 2300 |
200 | 6.4 | ≥200 | 9.5 | 4 | 22 | 2400 |
| 4 | ≥200 | | | 18.5 | 2400 |
| 2.5 | ≥200 | | | 17 | 2400 |
Structure and properties of pipes | | | | | | | | |||||
Tube series | inner layer | interlayer | outer sphere | design temperature | design pressure MPA | implementation standard | range of application | |||||
High pressure water injection pipe | Alcohol injection tubeOr other modified polymers | Polyester fiber, aramid fiber, carbon fiber and other high strength materials | high density polyethylene (hdpe) | -40~35 | ≤32 | SY/T6662.2-2020 | Single well water injection, sewage reinjection, ternary polymer | |||||
High pressure pipeline | EVOH High barrier material or other modified high barrier polymer | | | -40~75 | ≤32 | | Acid natural gas, coal bed gas, shale gas | |||||
oil-conveying pipe | PEX,PVDF,POK | | | -40~110 | ≤25 | | Single well gathering and transportation, branch trunk gathering and transportation; Mixed liquid transportation of oil, gas and water, oil field sewage | |||||
Alcohol injection tube | Nylon or other modified polymers | | | -20~90 | ≤32 | | Injecting alcohol and adding drugs |