| abstract |
The present invention provides a high-density polyethylene pipe and a joint which can suppress deterioration caused by external factors such as radiation, oxygen, and ultraviolet rays, and chemical cracks caused by chemical substances. The high-density polyethylene pipe (10) and the joint of the present invention are provided with: a pipe (1) having, as a main component, high-density polyethylene having a density of 0.940 g/cm 3 or more and 0.980 g/cm 3 or less; an inner gas barrier film ( 2a), which covers the inner surface of the conduit (1), and comprises ethylene-vinyl alcohol copolymer resin; Outer gas barrier film (2b), which covers the outer surface of the conduit (1), and comprises ethylene-vinyl alcohol copolymer resin; A thermal film (3b) covering the outer surface of the outer gas barrier film (2b) and formed of a resin having a melting point of 150°C or higher; and an outer layer (4b) covering the outer surface of the heat-resistant film (3b), and A low density polyethylene having a density of 0.910 g/cm 3 or more and 0.930 g/cm 3 or less is used as the main component. |