Prestressed metal corrugated duct

The metal is formed from galvanized or non-galvanized thin steel strips using a pipe coiling machine through pressure wave and spiral folding. It offers several advantages, including lightweight, easy bending, simple connection, low coefficient of friction, and excellent bonding with concrete. Available specifications for inside diameter include 50mm, 55mm, 65mm, 70mm, 75mm, 80mm, 90mm, and 100mm. Prestressed metal exhibits impermeability, pressure resistance, high strength, and good flexibility, ensuring construction quality and reducing construction time.