Situation PVC pipe industry as one of the products of technological development of PVC pipe, PVC pipe in everyday life can and striking. In Europe, 1980 - 1990 growth rate of 8 percent of plastic pipe, 2001 the annual output of 3.5 million tons of PVC pipe quotations, which accounted for 60% 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%. And China's first root UPVV flared tubing is in 1983 the birth of the plastic factory in Shenyang, after the Chinese mainland to have a PVC drain pipe production capacity. The late 1990s is a period of rapid development in mainland China PVC pipe. During some of the more than 50,000 tons annual capacity in factories are built and 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. 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 prices, 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 specifications, sea Widex (certified), PVC pipe supplied 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!