HIGH DENSITY POLYETHYLENE PIPE AND JOINT

The present invention provides a high density polyethylene pipe and a joint capable of suppressing degradation due to external factors such as radiation, oxygen, ultraviolet light, and the like, and chemical cracks due to chemical substances. The high-density polyethylene pipe (10) and joint are provided with: a conduit (1) containing, as a main component, high-density polyethylene having a density of 0.940-0.980 g/cm3; an inner gas barrier film (2a) that covers the inner surface of the catheter (1) and contains an ethylene-vinyl alcohol copolymer resin; an outer gas barrier film (2b) that covers the outer surface of the catheter (1) and contains an ethylene-vinyl alcohol copolymer resin; a heat-shielding film (3b) that covers the outer surface of the outer gas barrier film (2b) and is formed from a resin having a melting point of 150 DEG C or higher; and an outer layer (4b) that covers the outer surface of the heat-shielding film (3b) and contains, as a main component, a low-density polyethylene having a den