CONNECTING DEVICE FOR PIPING

A connecting device for piping according to one embodiment of the present invention comprises: a hollow adapter having a cap locking screw portion at one end, a locking screw portion inside the otherend, and a tapered placement portion inside the other end; a lid having a lid threaded portion corresponding to the lid locking threaded portion, the lid having a lid through-hole through which the pipe can pass formed therein; a main body seal which is disposed inside the adapter main body and is in contact with the outer peripheral surface of the pipe; a clamping ring which is configured in theadapter main body and is provided with a plurality of clamping pieces that are contacted with the peripheral surface of the pipeline that enters the adapter main body and elastically deform; a pipe fitting joint that is fixed to the pipe or the accessory, and that is provided with a joint through-hole through which the fluid can pass, a joint threaded section that corresponds to the joint lockingthreaded section, and a joi