Metal corrugated pipe is made of galvanized (HotDip or colddip) or non galvanized (black belt) lowcarbon steel strip through spiral winding and folding bite. The structure of the pipe is simple, impermeable, pressure resistant, high strength and good flexibility, which can ensure the construction quality of the project. It is used for the reserved duct of post tensioned prestressed concrete structure or component.

1. Circular section metal bellows

2. Metal bellows with flat section