Patent ID: 9285061
Filing Date: 2016-03-15
CPC Classification: F16L

Claim Text:
1. A housing-type pipe joint that couples pipes facing each other, which includes a pair of joint segments, an elastic seal ring, and fastening elements fastening the pair of joint segments, and in which the joint segments each have an arc portion, flange portions extending from both ends of the arc portion, and a concave groove formed in an inner peripheral surface of the arc portion to have the elastic seal ring fit therein, and in which the fastening elements make the flanges of the both joint segments approach each other to make the arc portions bend so that radii of curvature of the arc portions become smaller, and when, as a result of the bending, peripheral edges of the arc portions match outer surfaces of the pipes that are to be coupled, the coupling of the pipes is completed, the housing-type pipe joint comprising marks on peripheral edge regions of the arc portions, wherein, when positions of the peripheral edges of the arc portions corresponding to the marks come into contact with the outer surfaces of the pipes, the coupling of the pipes is completed, wherein the peripheral edge region of the arc portion of each of the joint segments is cut at both sides so that cut portions are formed so as to extend in directions from starting points of the peripheral edge region, which are proximate to the flange portions, toward an arc middle, respectively and the marks are provided at ends of the cut portions, which are proximate to the arc middle.