pvc tube processing _ sea Widex (certified) _pvc fittings provided by Qingdao Widex Rubber Material Co., Ltd. Widex Qingdao Rubber Material Co., Ltd. (www.haihuidaxiangsu.com) is specialized in "PVC profiles, seals, ABS extruded profiles, PVC raw material" of the enterprise, the company adhering to the "honesty, hard service" concept, for You provide the highest quality products and services. Welcome to inquire! Contact: Zhao Shuang. From the early 1980s, the country to promote the use of upvc pipe pvc pipe fittings, and formulated a series of policies, systems, standards, and has accumulated a lot of experience. To today, already has a sound product standards, test method standards and testing methods, technical specifications and other construction projects, thus unifying the standard size and quality indicators, to achieve the product interchangeability. This shows that the development of pvc water pipe has entered a mature stage, product quality and construction quality are guaranteed, thus ensuring the use of effects pvc water supply pipe. The international standard for water supply pe pipe (ISO4427) until 1996 before the official release. Our ISO4427 reference in 1999 to prepare a national standard GB / T13663 pvc pipe fittings manufacturers, and promulgated in 2000, but so far the standard pe pipe fittings, engineering and other technical specifications continues perfected. This shows that the quality has not been stable domestic pe pipe, pipe fittings, pvc pipe fittings matching process is not perfect, and therefore can not ensure the production, construction quality. PVC is the biggest characteristic flame retardant, so it is widely used in fire protection applications. But PVC in the combustion process releases hydrogen chloride and other toxic gases such as dioxins. PVC combustion in two steps. First at 240 ℃ -340 ℃ decomposition of hydrogen chloride gas and the combustion of a double bond-containing diolefins, and carbon combustion occurs at 400-470 ℃. It is one of the world's largest output of plastic products pvc pipe price, cheap, widely used, polyvinyl chloride resin is white or pale yellow powder. Depending on the use of different additives may be added, PVC may exhibit different physical and mechanical properties. Adding an appropriate amount of plasticizer in PVC resin can be made from a variety of hard, soft and transparent products. The density of pure PVC 1.4g / cm3, adding plasticizers and fillers such as density PVC plastic parts is generally 1.15-2.00g / cm3. Rigid PVC has good tensile, bending, compression and impact resistance, can be used alone to make structural materials. Soft PVC softness, elongation at break, increased cold resistance, brittleness, hardness, tensile strength will be reduced ,,. PVC has good electrical insulation properties, can be used for low-frequency insulation, chemical stability or. Due to the poor thermal stability of PVC, prolonged heating can cause decomposition, release HCL gas to color PVC, so its application range is narrow, the use temperature is generally between -15 ~ 55 ℃.