Plastic bellows, Xiong Wong Tai (certified), Deyang bellows provided by Xiong Wang Thai Plastic Products Factory. Xiong Wang Thai Plastic Products Factory (www.wangtai668.com) is specialized in "plastic tube, MPP power tube, CPVC pipe electricity, irrigation pipe, HDPE pipe, p" of enterprises, companies adhering to the "honesty, hard service" philosophy, to provide you with the highest quality products and services. Welcome to inquire! Contact: Fengjing Li. 1 pvc double wall corrugated pipe wall bellows: wall section is a double layer structure, its smooth inner walls and outer walls equidistant arrangement has a trapezoidal hollow pipe structure. Nominal diameter (DN): male pipe diameter, the inner diameter of the series and sub-OD Series categories performed simultaneously. Central to the bending stiffness: Pipeline measure resistance to deformation of the ring. Unit KN / m cement pipes inelastic, although with apron bellows, but poor sealing bellows prices, especially construction workers due to the heavy cement pipes, bad construction bellows manufacturers, simply no matter socket effect, lead to gum ring out of action, so that the pipe increased penetration. Five, HDPE pipe long service life, more than 50 years of safe use of PE pipe is more than 50 years, it has been proved not only international standards and new international, and has been proven in advanced countries. Theoretically cement pipe bellows model life of 20 years, but which is a silicate, has long been acid corrosion, life greatly reduced. Cement pipes all over the country because the sewage leak lead to ground subsidence, the interface fracture within a few years would have to replace the instance. Xiong Wang Thai Plastic Products