PIPE JOINT, ON-VEHICLE TANK, AND POWDER TRANSPORTING BULK VEHICLE

PROBLEM TO BE SOLVED: To provide a pipe joint for allowing easy mounting/demounting of a pipe without producing metal chipping during mounting/demounting. SOLUTION: The pipe joint 2 comprises a male side joint 20 having a circumferential contact face of a predetermined curvature formed on the outer face at one end of a first tubular member, and a circumferentially swollen locking portion formed at a base bottom portion of the contact face, and a female side joint 30 having a circumferential seal material holding face of a predetermined curvature formed on the inner face at one end of a second tubular member corresponding to the contact face, a circumferential seal material held by the seal material holding face, a first hook provided on the side of the second tubular member and having a first pawl portion to be locked to the locking portion of the male side joint, and a second hook provided on the side of the second tubular member in opposition to the side of the second tubular member where the first hook is provided and having a second pawl portion to be locked to the locking portion of the male side joint. The first pawl portion of the first hook and the second pawl portion of the second hook each have a surface contact member to be put in surface contact with the locking portion. COPYRIGHT: (C)2008,JPO&INPIT