Ultra-High Molecular Weight Steel Wire Composite Wear-Resistant Pipe
Ultra-High Molecular Weight Polyethylene Steel Skeleton Composite Wear-Resistant Pip
ApplicationApplication
01
7 Jan 2019
1. City gas pipelines , oilfield crude oil , natural gas gathering and transportation.
2. Urban Plumbing Engineering , Chemical Ocean Engineering.
3. Slurry conveying and circulating water systems in industrial sectors such as mining , coal , and electric power.
4. Mineral slurry pipes , natural gas and wet gas gas collection.
PROPERTIESPROPERTIES
| Characteristics | Requirements |
| Compression cracking stability | No cracks and cracks |
| Peel strength | ≥70 N/cm |
| Hydrostatic stability of the composite layer | The cutting annular groove does not crack or leak |
| Inner tube mortar wear rate | ≤ 0.30% |
| T, S short-term hydrostatic test 20 ℃ , Nominal pressure×2 ，1 h 80 ℃ , Nominal pressure×2 ×0.7 ，165h | No cracking, no leakage |
| T, S blasting test 20 ℃ , Burst pressure≥ Nominal pressure×3 | Meets pressure requirements |
| Q Short-term hydrostatic test 20 ℃ , Nominal pressure×1.6 ×2 ，1 h 80 ℃ , Nominal pressure×1.6 ×2 ×0.7 ，165h | No cracking, no leakage |
| Q blast test 20℃ , Burst pressure≥ Nominal pressure×3.3 × 1.6 | Meets pressure requirements |
| Hydrostatic strength and burst pressure | |||||
| Test type | Test temperature/°C | Test pressure/ MPa | Test time/h | Performance requirements | Test Method |
| Static hydraulic strength | 20 | 2PN | 1 | No cracking, no leakage | GB/T 6111 |
| 60 | 1. 5x0.7PN | 165 | No cracking, no leakage | GB/T 6111 | |
| Burst pressure | 20 | The pressure is continuously boosted until the specimen bursts | ≥3PN | GBT 15560 | |
| Physical and mechanical properties | ||||
| serial number | project | request | Test conditions | Test Method |
| 1 | Melt Mass Flow Rate ( MFR) | No more than ±25% change in polyethylene MFR before and after processing | 5 kg 、190℃ | GB/T 3682 |
| 2 | Thermal stability (oxidation induction time) | >20min | 210℃ | GB/T 19466.6 |
| 3 | Cracking stability | No cracks, de lamination and cracking. | 100mm/ min | GB/T 32439 |
| 4 | Peel strength | ≥10N/ mm | 100mm/ min | GB/T 2791 |
| 5 | Circumcision hydrostatic strength | The cutting annular groove does not crack or leak. | 20℃ 、1. 5PN 、165h | GB/T 32439 |
| 6 | Wear index | ≤140 | — | QB/T 2668. 1 -2017 |
| 7 | Inner tube mortar wear rate | <0.30% | — | QB/T 2668-2004 |
| Reduction coefficient of temperature to pressure | |||||
| Temperature t/°C | t<20 | 20<t<30 | 30<t≤40 | 40<t≤50 | 50<t<60 |
| Pressure reduction factor f1 at operating temperature | 1.0 | 0.95 | 0.90 | 0.86 | 0.81 |
| Bending radius | |||
| Nominal diameter/dn | 160 | 200-315 | 355-630 |
| Minimum permissible bend radius | 80d | 100d | 110d |
| Support spacing | ||||
| Nominal diameter/dn | ≤200 | >200 | ||
| Bracket spacing/ m | Vertical pipe | Cross pipe | Vertical pipe | Cross pipe |
| 2.4 | 1.6 | 3.0 | 2. 5 | |
| Other engineering design parameters | |
| project | numeric value |
| Medium temperature | -20≤t ≤65 ℃ |
| Elastic modulus | 2.8 ~ 3.0GPa |
| Thermal conductivity | 0. 15 ~0.2w/ m · k |
| Pipe wall roughness | Ra =0.007 |
| Absolute equivalent roughness of the pipe wall | 0.0015 - 0.009mm, Does not vary with running time |
| Hazzen - Williams | 155 ， Does not vary with running time |
| 12~15× 10-5m/ m · k Coefficient of linear expansion 12~15 ×10-5 m/ m·k | |
Product performanceperformance
| Outside diameter dnmm | Average outer diameter dem | Polyethylene protects the minimum wall thickness ey. minmme | Nominal pressure PNMPa | ||||||||||
| dem.min mm | dem.max mm | 1.0 | 1.6 | 2.0 | 2. 5 | 3. 5 | |||||||
| The minimum wall thickness e can be taken in the value range/mm | |||||||||||||
| ≥ | ≤ | ≥ | ≤ | ≥ | ≤ | ≥ | ≤ | ≥ | ≤ | ||||
| 160 | 160.0 | 162.0 | 2. 5 | — | — | — | — | 12.0 | 14.2 | 12.0 | 14.2 | 12.0 | 14.2 |
| 200 | 200.0 | 202.3 | 2. 5 | — | — | — | — | 12.0 | 14.2 | 12. 5 | 14.7 | 13.0 | 15.2 |
| 225 | 225.0 | 227. 5 | 2. 5 | — | — | — | — | 12.0 | 14.2 | 12. 5 | 14.7 | — | — |
| 250 | 250.0 | 252. 5 | 2. 5 | — | — | 12.0 | 14.2 | 12.0 | 14.2 | 13.0 | 15.2 | — | — |
| 315 | 315.0 | 317.7 | 3. 5 | 13.0 | 15. 5 | 13.0 | 15. 5 | 13.0 | 15. 5 | 14. 5 | 17.0 | — | — |
| 355 | 355.0 | 357.8 | 3. 5 | 13.0 | 15. 5 | 14.0 | 16. 5 | — | — | — | — | — | — |
| 400 | 400.0 | 403.0 | 3. 5 | 13.0 | 15. 5 | 15.0 | 17.8 | — | — | — | — | — | — |
| 431 | 431.0 | 434.0 | 3. 5 | 13. 5 | 16.0 | 15. 5 | 18.3 | — | — | — | — | — | — |
| 450 | 450.0 | 453.2 | 3. 5 | 14.0 | 16. 5 | 16.0 | 18.8 | — | — | — | — | — | — |
| 483 | 483.0 | 486.2 | 3. 5 | 15.0 | 17. 5 | 16. 5 | 19.3 | — | — | — | — | — | — |
| 500 | 500.0 | 503.2 | 3. 5 | 16.0 | 18.8 | 18.0 | 20.8 | — | — | — | — | — | — |
| 560 | 560.0 | 563.2 | 3. 5 | 20.0 | 23.0 | 21.0 | 24.0 | — | — | — | — | — | — |
| 630 | 630.0 | 633.2 | 3. 5 | 22.0 | 25.0 | 24.0 | 27.0 | — | — | — | — | — | — |