Marine Equipment
HDPE Dredge Pipe
HDPE Pipe is used for Sand delivery pipe, mud discharge pipe, dredge pipe, oil delivery pipe, mine pipe,water pipe.HDPE is a high degree of crystallinity, non-polar thermoplastic resin,...
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China HDPE Dredge Pipe:
HDPE Pipe is used for Sand delivery pipe, mud discharge pipe, dredge pipe, oil delivery pipe, mine pipe,water pipe.HDPE is a high degree of crystallinity, non-polar thermoplastic resin, the characteristics are non-toxic, tasteless,and odorless.
HDPE Dredge Pipes Advantage
bended under water,and excellent anti-wave.
The concave-convex is within 30°of area, can be connected directly on land.
Good wear-resistance, anti-aging, strong corrosion resistance, anti-uv, long service time.
Flange connection,smooth outer and inner wall,higher transmission effifiency than steel pipe 20% to 30%.
Either on land or water for using,total engineering cost is low, high efficiency, safer and more convenient.
HDPE Dredge Pipe Specification
| OD OF PIPE DN mm | SDR26 | SDR21 | SDR17 | SDR13.6 | SDR11 |
| 0.6 | 0.8 | 1 | 1.25 | 1.6 | |
| 140 | 6 | 7 | 8 | 10 | 13 |
| 160 | 7.5 | 8 | 10 | 12 | 15 |
| 180 | 7.5 | 9 | 11 | 13 | 17 |
| 200 | 8 | 10 | 12 | 15 | 18 |
| 225 | 9 | 11 | 13 | 17 | 21 |
| 250 | 10 | 12 | 15 | 18 | 23 |
| 280 | 11 | 13 | 17 | 21 | 25 |
| 315 | 12 | 15 | 19 | 23 | 29 |
| 330 | 13 | 16 | 20 | 24 | 30 |
| 350 | 14 | 17 | 21 | 26 | 32 |
| 400 | 15 | 19 | 24 | 29 | 36 |
| 425 | 15 | 20 | 25 | 33 | 42 |
| 450 | 17 | 21 | 27 | 34 | 45 |
| 500 | 19 | 23 | 30 | 37 | 48 |
| 530 | 20 | 24 | 31 | 38 | 50 |
| 560 | 21 | 26 | 33 | 41 | 51 |
| 600 | 22 | 28 | 35 | 43 | 54 |
| 630 | 24 | 30 | 37 | 46 | 57 |
| 660 | 26 | 31 | 38 | 48 | 59 |
| 710 | 27 | 33 | 42 | 52 | |
| 800 | 30 | 38 | 47 | 58 | |
| 850 | 32 | 40 | 50 | ||
| 900 | 34 | 42 | 53 | ||
| 950 | 36 | 45 | 56 | ||
| 1000 | 38 | 47 | 59 | ||
| 1050 | 40 | 49 | 61 | ||
| 1100 | 42 | 51 | 63 | ||
| 1150 | 44 | 53 | 66 |
Sand Delivery Pipe
Dredge Pipe
Contrast Of Wear Resistance
| Sandblast contrast test（SIO2） | 30% SIO2Mud scour contrast test | ||
| Material | Volume decreases | Material | Volume decreases |
| PE80 | 0.25 | 45 # steel | 25 |
| PE100 | 0.15 | Cast Iron Pipe | 15 |
| HDPE Pipe | 0.13 | HDPE Pipe | 8 |
Pressure Standard
| NO. | Items | Requirements | |
| 1 | 20℃ to quiet hydraulic strength (hoop stress 12.4Mpa, 100h) | No burst, No leak | |
| 2 | 80℃ to quiet hydraulic strength (hoop stress 5.5Mpa, 165h) | No burst, No leak | |
| 3 | 80℃ to static strength (hoop stress 5.0Mpa, 1000h) | No burst, No leak | |
| 4 | Breaking elongation, % | ≥500 | |
| 5 | Longitudinal shrinkage (110℃), % | ≤2.2 | |
| 6 | Oxidation induced time (200℃), min | ≥20 | |
| 7 | Weather resistance 1) (Pipe accumulative accept 3.5 GJ／m2 after aging energy | 80℃ to quiet hydraulic strength (hoop stress 5.5Mpa, 165h) | No burst, No leak |
| Fracture Shrink Rate % | ≥500 | ||
| Oxidation induced time (200℃) , min | ≥10 | ||
Performance Compared between HDPE Pipe and Other Pipe
| No. | Items | HDPE Pipe | Ordinary PE Pipe | Nylon 66 | Steel Pipe |
| 1 | Molecular | two hundred thousand --one million and two hundred thousand | twenty thousand-- two hundred thousand | ||
| 2 | density | 0.940 g/m³ | 0.945 g/m³ | 1.13-1.15 g/m³ | 7.8 g/m³ |
| 3 | impact strength 23℃ | 500 J/m | 300 J/m | 59-108 J/m | |
| 4 | impact strength -40℃ | 80 J/m | 50 J/m | ＜100 J/m | |
| 5 | tensile breaking strength | ＜28 Mpa | ＜25 Mpa | ＜61 Mpa | |
| 6 | longitudinal contraction rate of return | 2.20% | 3.00% | ||
| 7 | breaking elongation | ≥550% | ≥300% | 60-3000% | |
| 8 | wear rate | 190% | 210% | 100% | 100% |
| 9 | wear coefficient | 0.3-0.5 mm³ | 0.4-0.6 mm³ | 0.4 mm³ | 0.58 mm³ |
| 10 | resistant to corrosion | good | good | good | bad |
| 11 | encrustment | NO | YES | YES | YES |
| 12 | The inside surface of weld | Have swelled | Have swelled | Have swelled |
