Professional HDPE hollow-wall rHDPE hollow wall pipe is a structural wall pipe manufactured from high-density polyethylene with a hollow, ribbed cross-section that delivers high ring stiffness and excellent resistance to external soil and traffic loads while remaining remarkably lightweight. This innovative design enables fast, easy handling and installation without heavy lifting equipment, significantly reducing construction time and cost. The pipe is completely corrosion-proof, chemical-resistant, and immune to biological attack, ensuring a maintenance-free service life of over 50 years even in aggressive sewage and industrial effluent environments. Joints are typically made by electrofusion welding or elastomeric sealing rings, forming a fully leak-proof, infiltration-free system that protects groundwater from contamination. einforced spiral pipe