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| Comparison of existing technical schemes for coal mine pipelines | | | ||
| numerical order | existing technology | contrastive analysis | ||
| 1 | Polyethylene pipes for underground coal mines | Applicable caliber range is large, but the pressure is relatively small, generally the highest 1.6Mpa, the price of the same specification model is lower. | ||
| 2 | Steel mesh skeleton polyethylene pipe used in underground coal mine | Applicable caliber range is large, but the applicable pressure is small, DN200 up to 2.5MPa. The same specification model is the highest price. | ||
| 3 | Fiber-reinforced polyethylene liquid pipes for coal mines | Applicable caliber range is large, the pressure is high, up to 4Mpa, the use of non-metal or metal withholding joint, according to the working conditions, the pipeline can be fixed length, can coil, construction is convenient and fast. Best value for money | ||







































