Concentric pipe coupling

摘要: There has been provided a coupler for joining lengths of concentric pipe. A sleeve member receives the pipes in spaced relation therein, with an end inner pipe forward outer annular flange portion said is and extends radially inward as well outward member. rearward face faces away therefrom by selected length tail forming groove bounded wall rear flanged portion. compressible O-ring type elastomer seal disposed gasket concentrically sleeved between In compression, form circumferential about