CORROSION-PROOF MECHANICAL PIPE COUPLING AND CORROSION-PROOF MECHANICAL PIPE CONNECTING STRUCTURE

摘要

PROBLEM TO BE SOLVED: To provide a corrosion-proof mechanical pipe coupling and a corrosion-proof mechanical pipe connecting structure, by which pipe inserting and connecting work can be easily performed and corrosion-proof sealing of the pipe end can be sufficiently performed, in a core housed-type and pipe slip preventing-type corrosion-proof mechanical pipe coupling. SOLUTION: This pipe coupling is provided with a mechanical connecting part 3 on the end 18 of a metallic coupling main body 1, an inner surface resin coated layer 12 is formed on the inner peripheral surface other than the end of the coupling main body 1, and a cylindrical core part 13 extending toward the end is provided. A pipe end inserting part 14 is provided between the inner surface resin coated layer 12 and the cylindrical core part 13, a clearance is formed between the outer surface 130 of the cylindrical core part 13 and the inner surface P6 of a resin lining steel pipe P to be connected, a pipe end sealing packing 21 in which a water expansion rubber 4 is mounted in the pipe end inserting part 14 and a pipe outer surface sealing packing 22 capable of being extended and contracted n the pipe axial direction is mounted between the inner surface resin coated layer 12 and the end outer surface P7 of the lining steel pipe P.