The connection of PVC pipes and fittings is either with adhesives or with expansion joints, socket joints, etc. HDPE pipe connection adopts butt welding, electric welding pipe hoop connection, sealing ring socket sleeve and threaded connection, etc. Generally, the temperature adaptation range of PVC pipe is smaller than that of HDPE pipe. The temperature adaptation range of HDPE pipe can reach -60℃～40℃. Since the HDPE pipe and accessories are black, it can effectively prevent the influence of ultraviolet rays in the sun on the pipe. And sufficient wall thickness makes the sealing ring socket and socket interface resistant to temperatures of 100°C.
