From the early 1980s, the country to promote the use of upvc pipes, and formulated a series of policies, systems, standard PVC pipe prices, 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, and promulgated in 2000, but so far the standard pe pipe fittings, engineering and other technical specifications continues perfected. This shows that the country has not yet stabilized Qingdao pe pipe quality PVC pipes, pipe fittings matching is not perfect, and therefore can not ensure the production, construction quality. Hard PVC pipe has a nominal diameter of 50CM, but soft PVC pipe is generally the largest of 50mm. pvc pipe fittings rigid PVC pipe specifications: GB / T13020-1991 soft PVC pipe specifications: GB / T13527.1-1992 hard PVC pipe has a nominal diameter has :( units mm) 2.5,3,4,5,6, .. ... 355,400,450,500,560,630,710,800,900,1000 and other PVC-U and the difference between UPVC and UPVC PVC-U is, we usually say that PVC pipe, but the wording is just not the same sequence . PVC production process, in order to increase the performance of PVC plastics, PVC pipes to improve production efficiency, will be added plasticizers (such as DOP PVC pipe specifications, DBP, DINP, etc.), and add the plasticizer in PVC products will be relatively soft. Generally, we will not be added during processing plasticizer of PVC products collectively known as UPVC, also writing PVC-U. PVC pipe, sea Widex, PVC pipe fittings provided by Qingdao Rubber Material Co., Ltd. Widex. "PVC profiles, seals, ABS extruded profiles, PVC raw material" preferred Widex Qingdao Rubber Material Co., Ltd. (2), the company is located at: the 8th Yanshan Road Lacey City Development Zone, over the years, the sea Widex adhere to providing customers with the best quality service, Contact: Zhao Shuang. Welcome to the new and old customers call, letter, visit the guide, business negotiations. Sea Widex expect to be your long term partner!