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How much do you know about the application of PVC-U pipes and PE pipes in municipal water supply and drainage projects? What are their characteristics?
1. PVC-U pipe
The rigid PVC pipe is a PVC-U pipe, which can be divided into double-layer corrugated pipe, reinforced pipe, flat-wall pipe and steel-plastic composite winding pipe according to the pipe wall structure. When the PVC-U pipe is used as a drainage pipe, the concentration of hydrogen sulfide gas in the drainage pipe is higher than the concentration of hydrogen sulfide gas in the concrete drainage pipe, and the PVC pipe has a good odor sealing performance.
When PVC-U is used as a drainage pipe, its production energy consumption only accounts for 20% of the same diameter cast iron drainage pipe. It has low cost, aging resistance, good heat preservation effect and long service life, so it is widely used in municipal drainage. PVC-U pipe is relatively brittle and cannot withstand external pressure, so when the pressure requirement is high, use reinforced pipe or steel-plastic composite winding pipe, which has good pressure resistance. Based on the various advantages of PVC-U pipes, it is widely used in municipal drainage and rainwater pipes, and is convenient for construction and installation.
2. PE pipe
PE pipe is a polyethylene pipe, mainly including double-wall corrugated pipe, winding structure wall pipe, steel-plastic composite winding pipe and steel belt reinforced spiral corrugated pipe.
Double-wall corrugated pipes are usually connected by sockets or double sockets and sealed with rubber rings. In addition to the connection of double-wall corrugated pipes, the wall pipes of the winding structure can also be connected by welding, and can also be connected by clamps, halves, flanges, etc.
Polyethylene pipes are divided into low-density, medium-density and high-density. High-density polyethylene pipes are widely used in municipal water supply and drainage, which have impact resistance, heat resistance, abrasion resistance, and acid and alkali corrosion resistance. The penetration rate is low. The quick-cracking performance is obviously better than that of PVC-U, and the thermal insulation performance is good, so it is widely used in municipal water supply, drainage and rainwater treatment. Especially used in municipal water supply systems, it has the advantages of high pressure resistance, low head loss, and less water leakage.
