FIELD: mechanical engineering. SUBSTANCE: smooth end of one pipe is inserted into a bell with a flange and a shoulder on the end of the other pipe. A sealing spacer from an elastomer has a fastening member with a projection on the outer radial side of the spacer and an annular journal on the inner side, and a sealing body with an outer cylindrical surface. The outer surface of the spacer between the projection and the body is made concave with the inner diameter smaller than the diameter of the projection and the body. The outer diameter of the body is smaller or equal to the diameter of the outer projection surface. EFFECT: improved structure. 7 cl, 3 dwg
