Pipe joint structure, seal member, joint state management method for pipe joint, and joint state management apparatus for pipe joint

摘要

A pipe joint structure is provided with: a heel section (4a) that is configured so that a spigot that is formed on the end section of a pipe is inserted via a seal member (4) into a socket (2A) that is formed in the end section of another pipe and the seal member (4) is fitted to a recessed section (2B) that is formed on the inner circumferential section of the socket (2A); and a valve section (4b) that is compressed between the inner circumferential surface of the socket and the outer circumferential surface of the spigot. In addition, a marker member (4c) is provided to the heel section (4a) that is accommodated in the recessed section (2B). The socket circumference section of the pipe joint structure is subjected to non-contact inspection by a marker detection device (C2) from the spigot-side pipe along the axial direction of the pipe and the quality of the joining state of the pipe joint structure is determined on the basis of whether the marker member (4c) is detected.