Pipe joint, refrigeration device, and heat pump-type hot water device

A pipe joint comprising:

• a joint body which is attached to an interconnecting device and into which a pipe is to be inserted;
• and
• a coupling member which is arranged around the pipe which is inserted into the joint body,
• wherein the joint body and the coupling member each include a screw portion, and the coupling member is fastened to the joint body by mutually screwing the screw portions,
• wherein the coupling member includes a holding portion, and a pair of or a plurality of pairs of holding surfaces which are opposite to each other are formed on the outer circumferential surface of the holding portion so that the holding portion can be held with a fastening tool, and
• wherein a first part which is a part of the coupling member including at least the holding surfaces is configured to be disconnectable from a second part which is the remaining part of the coupling member.