Ign of composite diedead for large diameter winding pipe processing with poducessing with high production effeciency , high quality of winding pipe produced by adopting the unique winding process easy operation and high performance by adopting an andvanced plc 1.Resistance pressure, good impact.Inside of pipe u type steel belt can substantially improve the pipe ring stiffness. 2.Good nconomy .Light weight transport, installation easy , the price is cheaper. 3.Resistance ph, aging, not corrosion by sewage and chemistry, black pipe uv, extended uselife. 4.Drainage , sewage clear, inside of pipe small resistance, ablity to pass water strong, flow big. 5.Connection safe reliable, can use the electric hot-melt, shrinnk belt, inside and outside welding and so on combination, connect firm, the pipe no leakage. Packing film and wooden cases in standard container or according to customers' requirements