Abstract: A pipe joint includes a joint body, a pipe insertion part into which a pipe is to be inserted, an annular tightening member and a restriction part. The pipe insertion part is configured by a resin material with greater softness and elasticity than a material configuring the joint body, and is integrated with the joint body. The tightening member is disposed at an outer circumferential of the pipe insertion part and tightens the pipe insertion part from the outer circumferential side thereof by a tightening operation. The restriction part is provided at the pipe insertion part and, before the tightening operation, blocks movement of the tightening member in an axial direction of the pipe insertion part relative to the pipe insertion part and restricts rotation of the tightening member in the circumferential direction of the pipe insertion part relative to the pipe insertion part.

Abstract: Fuel piping for a vehicle, which is fixed by clamps and routed on a vehicle body, is formed to have a circular hollow section inside and anisotropy in a wall thickness thereof in the circumferential direction. In particular, the fuel piping for a vehicle has at least one thick-wall portion in the circumferential direction and is disposed on a vehicle body so that the thick-wall portion is positioned vertically at the top or bottom, or has one thick-wall portion in the circumferential direction and is disposed on the vehicle body so that the thick-wall portion is positioned vertically at the top. In addition, the clamp for fixing to the vehicle the fuel piping for a vehicle includes a holding portion for arranging the thick-wall portion vertically at an end, and holding the fuel piping for a vehicle so as not to be turned in the circumferential direction thereof.

Abstract: Fuel piping for a vehicle, which is fixed by clamps and routed on a vehicle body, is formed to have a circular hollow section inside and anisotropy in a wall thickness thereof in the circumferential direction. In particular, the fuel piping for a vehicle has at least one thick-wall portion in the circumferential direction and is disposed on a vehicle body so that the thick-wall portion is positioned vertically at the top or bottom, or has one thick-wall portion in the circumferential direction and is disposed on the vehicle body so that the thick-wall portion is positioned vertically at the top. In addition, the clamp for fixing to the vehicle the fuel piping for a vehicle includes a holding portion for arranging the thick-wall portion vertically at an end, and holding the fuel piping for a vehicle so as not to be turned in the circumferential direction thereof.

Abstract: A pipe fitting having a main body portion into which a retainer is inserted and which, when inserted over a pipe, a flange provided to the pipe contacts first taper portions formed to a front side of the retainer, pushes out the first taper portions, and passes by the retainer. When the main body portion is pulled off the pipe, the flange contacts second taper portions formed to a rear side of the retainer, pushes out the second taper portions and passes by the retainer.

Abstract: A pipe fitting having a main body portion into which a retainer is inserted and which, when inserted over a pipe, a flange provided to the pipe contacts first taper portions formed to a front side of the retainer, pushes out the first taper portions, and passes by the retainer. When the main body portion is pulled off the pipe, the flange contacts second taper portions formed to a rear side of the retainer, pushes out the second taper portions and passes by the retainer.