youbo1

The problem is more difficult to solve the matching problem tube. Currently less than 250 mm in diameter PVC pipe is relatively complete, but the larger diameter PVC pipe has become a problem of matching. The current solution is to use a metal pipe (steel or ductile iron corrosion coated welded) together with a specially designed flange joints, such as Zhengzhou, chemical building materials in the national water company introduced at the experience; other is to use PVC welding and then winding FRP outer layer of the tube, such as IPEX PVC piping system. Diameter of 200 mm or more using this PVC / FRP pipe.

Large diameter plastic pipe water supply is difficult to develop the matter: pipe difficult to shape; tube difficult to complete; connection problem difficult to solve.

Therefore, foreign large-diameter water main pipe is polyethylene plastic pipe. The reason is the production of large diameter PVC pipe in the process is relatively easy and convenient to connect polyethylene pipe manDental Loupes ufacturing large diameter polyethylene pipe is not difficult.

Polyethylene in the melt extrusion when the flow is very good thermal stability, Ye Hao, with the production of large diameter pipe extrusion easier. In the past without large diameter polyethylene pipe is because the intensity is relatively low when the polyethylene to manufacture large diameter polyethylene pipe, wall thickness needed too, on the one hand is not economic, the other hand, because the manufacturing process difficulties. Later, special materials, polyethylene pipe has been greatly developed, the performance has been significantly improved, especially in high-strength materials PE100 grades came out, it digitizing is the development of large-diameter polyethylene plastic pipe opened the way.

Highlight the advantages of PE pipe can melt flexibility and connectivity. Large diameter polyethylene pipe is generally used hot-melt welding, pipe welding strength can reach the strength of the body. Large diamecar fuel pumpter polyethylene pipe is relatively easy to solve, because you can use polyethylene pipe, sheet metal and injection molded parts through machining and welding to produce melt.

In summary, the development of large-diameter plastic pipe water supply is clearly the directionthermowell of polyethylene pipe.

Be sure, PVC has high strength, low-cost advantages, PVC pipe fittings used in the field of water use is promising, especially abroad, has been gradually commercialized two-way stretch PVC pipe, a higher intensity lower cost, impact and better. However, the PVC pipes and fittings should not create large-diameter, suggested the company should not beDental Handpiece forced to develop large-diameter PVC pipe.