Fluid piping fittings are sometimes referred to as fluid couplings, which are also called couplings, fittings, luer locks, or simply fittings, joints and connectors.
A telescopic joint fitting refers to a joint/pipe having a structure capable of absorbing axial expansion and contraction caused by temperature change etc.
It is a movable pipe fitting for absorbing contraction in the longitudinal direction of the pipe due to pressure change and temperature change of the piping system, which absorbs expansion and contraction by a bellows type expansion joint fitting or a bellows-shaped metal cylinder.
It is mainly used for piping of water, hot water, steam and oil. The packing retainer should be tightened after a certain period to prevent leakage of liquid and promote safe use.
Since the telescopic part of the telescopic joint fitting is made so that it can freely expand and contract, it cannot resist the thrust generated by the internal pressure: therefore be aware that there is a risk of the telescopic part being damaged unless measures to suppress thrust are taken.