PVC profile products experienced a period of rapid development and introduction period pvc pipe, from a time point of view, can be defined as the mid-1980s around -90 twentieth century and in 1995 - 2002. After 2003, PVC profile industry entered a transition period. The import of products: Manufacturer common pursuit of low cost, simplified window profiles section, fill a large number of formulations of calcium carbonate, resulting in low performance, a lot of quality problems affecting the promotion of the product. 1995 began pvc pipe features a number of strong businesses, start the digestion and absorption of foreign technology essence Continental profiles, developed their own doors and windows series, became the dominant plastic doors and windows, doors and promoting technological upgrading and development, but also the entire industry has been an unprecedented development and growth. 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 plastic pvc pipe production process, in order to increase the performance of PVC plastics, increase productivity, added plasticizers (such as DOP, DBP pvc pipe quotations, 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. Widex Sea (Figure) | pvc pipe equipment | pvc pipe provided by Widex Qingdao Rubber Material Co. "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!