LDPE Pipes

The roughness of the surface around a third less than steel, which significantly reduces the pressure drop along the length of the pipeline, and therefore allows for a smaller diameter than in the case of steel pipes. Another very good feature plastic pipes - this is their resistance to stray currents. (Steel pipes are often damaged due to exposure to stray currents, especially in the inlets near the stations and subway lines.) Well, of course, it should be noted that the pipes of polymeric materials in their fully meet the requirements of modern design housing and sanitation facilities. The most used material from the polymer is polyethylene. It is durable, chemically resistant, low-toxic, has a dielectric property. Distinguish low-pressure polyethylene HDPE and LDPE pressure. One of the most common species is polilietilena cross-linked polyethylene.

The technology was developed to obtain T. Engel for more than twenty years ago and was first mastered on an industrial scale firms REHAU (Germany) and WIRSBO (Sweden). High-pressure high-molecular polyethylene with antioxidants and initiate the reaction melt evenly on equipment that is formed in the thermoplastic state in the tube and sew. The process of merging is: which result the collapse of the initiators of radical reactions in sever links polyethylene, respectively, of one hydrogen atom adjacent radicals are joined together, forming a bridge cross-linking. Depending on the method of stitching are three main types of cross-linked polyethylene: PEXa (peroxide crosslinked), PEXb (silane cross-linking) and PEXc (crosslinking under the influence of X-rays). The higher the degree of crosslinking of polyethylene, the more apparent its positive qualities.