Pipe clamping device

A pipe clamping device for clamping a first pipe and a second pipe, the pipe clamping device comprising:

• an annular case with a central opening into which the first pipe and the second pipe are inserted;
• a tightening member movable between a tightening location where the tightening member tightens an outer circumferential surface of the first pipe and the second pipe and a disengagement location where the tightening member does not impose pressure on the outer circumferential surface of the first pipe and the second pipe, the tightening member being an annular member and being disposed in the inner region of the circumferential surface of the case and releasably combined to the case;
• and
• a stopper restricting a radial movement of the tightening member such that a diameter of the tightening member at the disengagement location does not extend beyond a predetermined value, the stopper being formed in the annular case,
• wherein, to prevent the tightening member from disengaging from the case at the tightening location and the disengagement location, the tightening member comprises a disengagement prevention projection protruded in an outwardly radial direction and the annular case comprises a disengagement prevention groove into which the disengagement prevention projection is inserted.