One product of PVC pipe industry status quo as technological development, PVC pipe in everyday life can and striking. In Europe, 1980 - 1990 growth rate of 8% of plastic pipe in 2001, the annual output of 3.5 million tons, of which 60 per cent of PVC pipe. 1985 US production was 1.6 million tons of plastic pipe, 1999 annual output of about 3.6 million tons, of which, PVC pipe accounted for 78%. China's first root UPVV flared tubing is in a plastic factory in Shenyang in 1983 the birth, then, China has the PVC, drainage capacity. The late 1990s is the period of rapid development in China PVC pipe. During some of the annual production capacity of 5 million tons of plant succession pvc pipe plant put into operation, tons more than the scale of production of more than 30 PVC pipe factory. Annual production capacity of 2 million tons of plastic pipe. From the early 1980s, the country to promote the use of upvc pipe, and developed a series of policies, systems, standards, and has accumulated a lot of experience. To today, already have a sound product standards, test method standards and testing methods, construction engineering and technical specifications, so as to unify the standard size and quality indicators, to achieve a product interchangeability. This shows that the development of pvc water supply pipe has entered a mature stage, the product quality and construction quality are guaranteed home pvc pipe, thus ensuring the use of effects pvc water supply pipe. The water supply pipe pe international standard (ISO4427) was officially released until 1996. Our reference in 1999 to write the national standard ISO4427 GB / T13663, and promulgated in 2000, but has standard pe pipe fittings, engineering and other technical specifications continues perfected. This shows that domestic pe pipe quality has not been stable, pipe fittings supporting not perfect, and therefore can not ensure the production, construction quality. PVC, the abbreviation PVC (Polyvinyl chloride polymer = PVC molecular structure) Qingdao pvc pipe, is a thermoplastic resin made by the polymerization of vinyl chloride in the role of initiator. Is a homopolymer of vinyl chloride. Vinyl chloride homopolymers and copolymers of vinyl chloride resin system call. PVC amorphous structure of the white powder, the degree of branching is small. Industrial production of PVC molecular weight generally in the range of 50,000 to 120,000, having a large polydispersity pvc pipe, the molecular weight increases with lowering the polymerization temperature; no fixed melting point, 80 ~ 85 ℃ begins to soften, 130 ℃ becomes sticky elastic state, 160 ~ 180 ℃ began to change for the viscous flow state; has good mechanical properties, tensile strength of about 60MPa, the impact strength of 5 ~ 10kJ / m2; has excellent dielectric properties. However, poor stability to light and heat, at or above 100 ℃ by prolonged exposure to sunlight, it will decompose to generate hydrogen chloride, and further autocatalytic decomposition, cause discoloration, physical and mechanical properties is also decreased rapidly, in practice must be added to stabilize agents to improve the stability to heat and light. Household pvc pipe _pvc pipe _ sea Widex Widex provided by Qingdao Rubber Material Co., Ltd. Widex Qingdao Rubber Material Co., Ltd. (www.haihuidaxiangsu.com) strong, credible, in Qingdao, Shandong industrial products industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the sea Widex and you work into the brilliant, for a better future!