PIPELINE WITH RING AND PIPE JOINT STRUCTURE

To provide a pipe joint structure which can easily perform connection of two pieces of pipelines.SOLUTION: A pipe joint structure 200 includes 2 pieces of pipelines 10 with a ring, and a pipe joint 30. The pipeline 10 with the ring includes: a pipe 12 in which a flange part spreading radially is provided at an end part; and a ring-like member 18 having an inner diameter larger than an outer diameter of the pipe 12 and smaller than an outer diameter of the flange part, and arranged outside of the pipe 12. On the opposite side from the flange part of the ring-like member 18, a tapered surface is formed toward the outer peripheral side. The pipe joint 30 includes: a seal member 32 including a seal body 42 of a lamination structure in which a first annular disk 46 and a second annular disk 48 softer than the first annular disk 46 are laminated so that the second annular disks 48 are on both sides, and a cylindrical member 44 for surrounding an outer peripheral surface of the seal body; and a clamp 34 having a plurality of circular arc-shaped clamp pieces 52 in which a taper groove engaged with the tapered surface is formed on the inner side, and fastening means for fastening the plurality of clamp pieces 52.SELECTED DRAWING: Figure 17 【課題】２個の配管の連結を容易に行える管継手構造を提供する。【解決手段】管継手構造２００は、２個のリング付き配管１０と管継手３０を備える。リング付き配管１０は、径方向に広がる鍔部が端部に設けられた管１２と、管１２の外径より大きく、鍔部の外径より小さい内径を有し、管１２の外側に配置されるリング状部材１８とを備える。リング状部材１８の鍔部と反対側には、外周側に向けてテーパ面が形成されている。管継手３０は、第一環状盤４６と、第一環状盤４６より軟質な第二環状盤４８とを、第二環状盤４８が両側となるように積層させた積層構造のシール体４２と、その外周面を取り囲む筒状部材４４とを有するシール部材３２、及びテーパ面に係合するテーパ溝が内側に形成された円弧状の複数のクランプ片５２と、複数のクランプ片５２を締め付ける締付手段とを有するクランプ３４を備える。【選択図】図１７