Patent ID: 6030005
Filing Date: 2000-02-29
Classification: F16L,F24F

Abstract:
A method for coupling a first pipe with a second pipe, said pipes adapted for ventilation duct systems or duct systems for conveying finely divided material, comprising the steps of:providing a first pipe and a second pipe, each pipe having an end with an outwardly directed circumferential end bead having a radially outwardly directed surface and an axially outwardly directed surface;providing a sealing ring having a first circumferential portion and a second circumferential portion, at least the first circumferential portion of the sealing ring defining an inner diameter;abutting the first circumferential portion of the sealing ring against the radially outwardly directed surface of the end bead of the first pipe in which the inner diameter defined by the first circumferential portion of the sealing ring is smaller than the diameter of the outside of the end bead of the first pipe, the second circumferential portion of the sealing ring being arranged axially outside the end bead of the first pipe;abutting the second circumferential portion of the sealing ring against the radially outwardly directed surface of the end bead of the second pipe;bringing the first and second pipes together with the axially outwardly directed surfaces of the end beads in an end-to-end abutting relationship, the first pipe and the second pipe held in the end-to-end abutting relationship by said sealing ring; andtightening an annular clamping band around the end beads of both the first and second pipes such that at least a portion of the sealing ring is captured between the clamping band and the end beads of the first and second pipes as the clamping band is tightened.