... ISO SGS CE The extrusion line for PE Double Wall Corrugated Pipe is a new research achievement in BadeliHuafeng in the plastic ... complex fitting, and replaces the concrete pipe and cast iron pipe. In China, PE double wall corrugated piping is being used extensively to ... 300Φ400,Φ500,Φ600,Φ800 Φ800,Φ1,000,Φ1,200 Corrugated forming machine SBGC-250Vertical style SBGC-500Vertical style SBGC-1000Vertical ...