Jingdezhen [quality] of GB 3mm wall thickness prestressed corrugated plastic pipe - scale light volume ahead of the bridge Bellows / prestressed bellows / corrugated plastic pipe / concrete cast corrugated plastic pipe / HDPE pipe / plastic spiral / Metal Bellows / prestressed corrugated metal pipe in the process of highway construction, post-tensioned concrete bridges have been widely used. After using the time-tensioned precast concrete beams, in order to ensure effectiveness and durability of prestressed beam structure, the need to contain pore pressure grouting tendons. Prestressed bellows, bellows bridge corrugated plastic pipe, HDPE corrugated plastic pipe, prestressed corrugated plastic pipe bellows compaction grouting will not rust strand prestressing in advance so that the loss caused by the bridge shortened life expectancy. Bellows formation of defects is mainly grout not fill the entire bellows, leading to the top of the crescent-shaped bellows have a greater gap, and even exposed tendons phenomenon. The other phenomenon is strong enough slurry grouting, grouting body can not make, strand, concrete beam to form a unified whole. To cope with these problems, Hengshui Optical Engineering Rubber Co., Ltd. came into being, the company is a specialized production facilities bridge construction project supplies the professional manufacturers, the company products are exported to bridge various provinces and cities nationwide to win customers unanimous praise. Heng light plastic corrugated pipe materials is high-density polyethylene (HDPE), which itself does not corrode, but its corrosion resistance, aging resistance far superior to metal materials, a large number of domestic cable stayed bridge of the outer sheath is The best proof. Such as tendons provides a far superior barrier protection metal bellows seal, good impermeability, more suitable for vacuum grouting.