Strength Corrugated Metal Duct

  Pre - stressed plastic corrugated pipe is made of HDPE as the raw material. It is mainly used for the hole - forming of tie - bars in post - tensioned prestressed cement structures. It has the advantages of good sealing performance, no water or grout seepage, high ring stiffness, small friction coefficient, aging resistance, anti - electrical erosion, good flexibility and elasticity, and is not easy to be chiseled by vibrating rods. Besides, the new connection method makes the construction connection more convenient. Corrugated metal ducts for prestressed concrete are usually made of galvanized or non - galvanized low - carbon steel strips by spiral folding and locking. The surface is corrugated, which is used as the reserved duct in post - tensioned prestressed concrete structures or components. It has the advantages of being resistant to acid and alkali corrosion, good sealing, no seepage, high strength, and good flexibility. Both prestressed plastic and metal bellows are widely…