Shandong PVC pipe, sea Widex (certified), PVC pipe is provided by Qingdao Rubber Material Co., Widex. Widex Qingdao Rubber Material Co., Ltd. (www.haihuidaxiangsu.com) is specialized in "PVC profiles, seals, ABS extrusion profiles, PVC raw material" of the enterprise, the company of "honesty, hard service" concept, for You provide the most quality products and services. Welcome to inquire! Contact: Zhao Shuang. PVC pipe connections are mainly gasket, bonding and flanged three kinds. Greater than or equal to 100 mm diameter pipes commonly used Aprons interfaces; less than 100 mm diameter pipes are commonly used adhesive joints, and some loose-fitting. When crossing sewer pipes or other pipes, metal pipes are normally used, then the plastic pipe and metal pipe flange connection. Before and after the valve is connected to the pipe flange connection are also used. When a small-diameter pipes when using solvent bonding PVC pipe shall socket at the back of small round PVC pipe prices, to form a groove, and to ensure smooth and perpendicular to the axis of the fracture, so as to bond securely to prevent leakage. 2 generally greater than or equal to 100 mm diameter PVC pipes are used Aprons interfaces. Must arrange before installing the tube socket parts chamfering, also check if the quality apron. You must wipe socket, apron, etc. When installing clean. 3 traditional pipeline trench excavation requires only able to install the pipe into the trench and can be sealed to PVC injection tube, in the absence of the original loose soil, compaction can not pressurized cushion. PVC is the biggest characteristic is flame retardant, so it is widely used in fire protection applications. But PVC in the combustion process releases hydrogen chloride and other toxic gases, such as dioxins. PVC combustion in two steps. First at 240 ℃ -340 ℃ combustion and decomposition of hydrogen chloride gas having a double bond diolefin, and then combustion of carbon occurs at 400-470 ℃. It is one of the world's largest production of plastic products, cheap, widely used PVC pipe, PVC resin is white or pale yellow powder. Depending on the use of different additives can be added, PVC can exhibit different physical and mechanical properties. Adding an appropriate amount of plasticizer in PVC resin can be made from a variety of hard, soft and transparent products. Pure PVC density 1.4g / cm3, adding plasticizers and fillers, such as the density of PVC plastic is generally 1.15-2.00g / cm3. Rigid PVC has good tensile, flexural, compressive strength and impact resistance, can be used as structural materials alone. Soft PVC softness, elongation at break, cold resistance will increase, but the brittleness, hardness ,, tensile strength is lowered. PVC has good electrical insulation properties, can be used for low-dielectric material, its chemical stability or. Due to poor thermal stability of PVC, prolonged heating can cause decomposition and emit HCL gas, discoloration of polyvinyl chloride, so its narrow range of applications, the use temperature is generally between -15 ~ 55 ℃.