Plastic double-wall corrugated pipe 1,,Lift time:50years 2.ISO,OHSAS18001 3,.Easy to install Plastic double-wall corrugated pipe1.As a company listed in Singapore , ... in plastic pipes and fittings since 1994, with the strength of production category and specification completed and diversified. Our main products ... and loading,and fixed joint4.Photos:4.Certificates: Plastic double-wall corrugated pipe