Abstract: A fuel piping structure includes a fuel pipe, a pressure sensor in communication with the fuel pipe through a communication channel, and a sensor holding part including a projecting part projecting to an outer-peripheral side, being connected to the fuel pipe, and holding the pressure sensor disposed therein. A ring-shaped elastic member is provided between an underside of the projecting part and the fuel pipe, the projecting part being pressed against the fuel pipe. The tip side of the sensor holding part on which a ring-shaped seal member is provided is inserted into a recessed part of the fuel pipe and in communication with the inside of the fuel pipe, and the communication channel is in communication with the recessed part. In the sensor holding part, a conduction channel for a seal test is formed from an end face of the projecting part to the seal member.

Abstract: A fuel piping structure includes a fuel pipe, a pressure sensor in communication with the fuel pipe through a communication channel, and a sensor holding part including a projecting part projecting to an outer-peripheral side, being connected to the fuel pipe, and holding the pressure sensor disposed therein. A ring-shaped elastic member is provided between an underside of the projecting part and the fuel pipe, the projecting part being pressed against the fuel pipe. The tip side of the sensor holding part on which a ring-shaped seal member is provided is inserted into a recessed part of the fuel pipe and in communication with the inside of the fuel pipe, and the communication channel is in communication with the recessed part. In the sensor holding part, a conduction channel for a seal test is formed from an end face of the projecting part to the seal member.