1, the inner and outer surfaces look no irregularities, no similar defects 2, the internal pressure of the experimental 30s load 750N (stress type), continued 1min carbon bellows standard rate of change in diameter of less than 25% 3, the impact of the experimental treatment 240h Carbon 60 ℃ Bellows quotes, and placed 2h at 0 ℃, at 300mm high impact hammer with 2.0Kg (large stress type) Guangdong carbon bellows, without damage. 4, the insulation resistance of carbon bellows, MΩ ≥100 5, withstand voltage performance 2000V breakdown voltage 15min No 6, pipe forming performance pipe within 90o to 180o bend range, no obvious structural defects visually 7, ring stiffness ≥ 18.0 Xiong Xiong Wang Thai Plastic Products Factory Wang Thai Plastic Products Factory company has been established, starting from project development to product standardization production of polyethylene gas pipe HDPE double wall corrugated pipe bellows Sichuan Carbon Carbon bellows, Wenzhou Carbon bellows, provided by Xiong Xiong Wong Tai Wang Thai Plastic Products Factory. Xiong Wang Thai Plastic Products Factory (www.wangtai668.com) strong, credible, in Baoding UPVC pipe industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Taihe Wang Xiong you hand into the brilliant, for a better future!