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, 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 thick pvc pipe 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. Suspension polymerization of the monomer was suspended micro droplets dispersed in the aqueous phase, the choice of oil-soluble initiator is soluble in the monomer, the polymerization reaction proceeds pvc pipe in these droplets, the polymerization reaction heat in time absorbed by water, In order to ensure that these droplets dispersed in water the form of beads, suspension stabilizers need to be added, such as gelatin, polyvinyl alcohol, methyl cellulose, hydroxyethyl cellulose and the like. Initiator to use more organic peroxides and azo compounds, such as peroxydicarbonate, diisopropyl peroxydicarbonate, dicyclohexyl peroxydicarbonate, di-ethylhexyl acrylate and azobisisobutyronitrile heptanenitrile, even azobisisobutyronitrile and the like. Polymerization in a polymerization vessel is carried out with a stirrer. After the polymerization, the material flows into the recycling monomer within the monomer recovery tank or stripper. Then flows into the mixing vessel, washed and then centrifugal dewatering, drying derived resin products. Vinyl chloride monomer should be as pumping from the resin. As food packaging of PVC, free monomer content should be controlled below 1ppm. In order to secure a predetermined time of polymerization and the molecular weight and molecular weight distribution of the resin to prevent implosion, good temperature and pressure must be controlled polymerization process. Size and size distribution of the resin by stirring for selection and control the speed and the amount of suspension stabilizers. Mass of the resin to the particle size and particle size distribution, molecular weight and molecular weight distribution, apparent density, porosity, fish-eye, thermal stability, color, free flowing powder and impurity content and other properties characterized. The polymerization of polyvinyl chloride (referred to as PVC) waterproofing membrane reactor should be the main equipment supply pvc pipe, made of stainless steel or enamel-lined reactor body, equipped with a stirrer and a heat jacket temperature control, or in the cold exhaust pipe, a reflux condenser and the like. In order to reduce production costs, the volume of the reactor by a few cubic meters, more than ten cubic gradually to the large-scale development, the maximum has been reached 200m (see tank reactor). Polymerization reactor to be cleaning after repeated use. Polyvinyl alcohol and cellulose ethers such as suspension stabilizer for PVC obtained generally more loose, more pores, large surface area, pvc pipe production, easy to absorb plasticizers and plastics. pvc crosslinking into radiation crosslinking and chemical crosslinking. 1. The radiation crosslinking. Use of high-energy rays, electron beams is generally cobalt 60 radiation source of rays and electron acceleration generated, but mainly the latter. Coupled to help crosslinking aid (two or more carbon-carbon double bond of a monomer structure) crosslinked. But the operation is difficult, for equipment requirements. 2. Chemical crosslinking. Triazole-dimercapto-crosslinked amine salts, amine salts triazol-dimercapto-FSH, crosslinking mechanisms for combining an amine and a mercapto group to attack the carbon-chloro-polar bond implement substitution reaction. After the crosslinked product in UV resistant, solvent, temperature impact toughness, etc., have a comprehensive manner. And that device 1. solve the difficult problem of radiation crosslinking. 2. PVC toughening, weather, temperature, UV resistant and so performance has greatly improved. PVC 3. relieve radiation crosslinking or peroxide crosslinking degradation, discoloration overcome serious flaws. To obtain a better appearance and performance of products. 4. simple process, suitable for molding, coating, rotational molding and the like process. Supply pvc pipe _ sea Widex (certified) _pvc tube provided by Qingdao Rubber Material Co., Widex. Widex Qingdao Rubber Material Co., Ltd. (www.haihuidaxiangsu.com) is Qingdao, industrial products leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Widex leadership in the sea with the staff warmly welcome all inquiries negotiations to create sea Widex a better future.