Our RPAP5 composite pipes and fittings are ideal for hydronic heating system, radiant heating system and solar heating system in every type of buildings. Thickness of the aluminum layer reaches the standards of ASTM, ensuring high bearing capacity. Based on TIG welding, weld joint comes with high strength and small linear expansion coefficient that result in no deformation. With excellent roundness, the floor heating pipe complies with the F1335-04 standard. Double heat fusion technique enables the aluminum layer to be completely isolated from the outside environment, thus ensuring excellent resistance to corrosion and up to 50 years’ service life.