Abstract:Aiming at the problem that the cross helically wound steel wires reinforced polyethylene composite pipe(abbreviated as SRCP)can not be used in the open air and the maximum pressure bearing capacity is 3.5MPa, which can not meet the application in the high-pressure field, a compound for ultraviolet(UV) resistant was prepared, and an UV resistant SRCP with the maximum pressure bearing capacity of 7.0MPa was developed.The configuration of reinforcing steel wire was designed by force balance method.The pressure bearing capacity of SRCP was verified by hydrostatic pressure test at 20 ℃, 60 ℃ and bursting pressure test. The UV resistance effect of the compound was tested by UV aging test.The results showed that 400 steel wires with a diameter of 1.2mm were used in the four-layer steel wire winding reinforcement structure to prepare the high-pressure SRCP.The SRCP has passed the hydrostatic tests at 20 ℃, 14MPa, 1h and 60 ℃, 8.4MPa,165h, and the bursting pressure reached 21.9MPa,indicating that the pressure of the SRCP reached the design pressure of 7.0MPa.After 336h UV aging test, the retention rate of mechanical properties of the UV resistant compound is more than 80%, indicating that the UV resistant compound has good UV resistance effect.