NOVELTY - A resin piping (1) has a tubular component (2) constructed by interposing adhesive resin layer (5) between inner surface resin layer (3) and external surface resin layer (4). The inner surface resin layer contains an ethylene-tetrafluoroethylene-hexafluoropropylene copolymer having carbonate group and/or carboxylic acid halide group in polymer-chain terminal or side chain, or ethylene-tetrafluoroethylene copolymer having carboxyl group and/or carboxylic anhydride group. The external surface resin layer contains acid-modified polypropylene resin or nylon resin.    USE - Resin piping is used for fuel cell for motor vehicles.    ADVANTAGE - The resin piping has excellent oil resistance with respect to rancid fuel oil, and water tightness of junction portion of tubular component and coupling component, and is manufactured by simple process in short period of time.    DETAILED DESCRIPTION - A resin piping has a tubular component constructed by interposing an adhesive resin layer between an inner surface resin layer and an external surface resin layer, which are laminated coaxially, and integrated. The inner surface resin layer contains an ethylene-tetrafluoroethylene-hexafluoropropylene copolymer having carbonate group and/or carboxylic acid halide group in polymer-chain terminal or side chain or ethylene-tetrafluoroethylene copolymer having carboxyl group and/or carboxylic anhydride group. The external surface resin layer contains acid-modified polypropylene resin or nylon resin. The adhesive resin layer contains nylon 12. A coupling component (6) containing the same resin as the inner surface resin layer is integrally provided in the longitudinal direction end portion of the tubular component. An INDEPENDENT CLAIM is included for manufacture of resin piping.    DESCRIPTION OF DRAWING(S) - The drawing shows cross-sectional view of resin piping.    Resin piping (1)    Tubular portion (2)    Inner surface resin layer (3)    External resin layer (4)    Adhesive resin layer (5)    Coupling component (6)