Abstract
In joints capable of disassembling the joint portion in the fixed state of the FRP pipe, there are a flange joint for joining at the interview faces with a number of bolts and a union joining from outside with one screw. In any of the joint parts for connecting to the tube end, there are three types of adhesion, threaded, and layered junctions. Furthermore, it is also possible to interpose a spacer having a function such as bend/ branch between the joints. This is a research report on these selectable high-pressure tube fittings.