Seal assembly for flange connection of piping

摘要

The assembly comprises a ductile and creep-resistant metal support ring (1), which is surrounded by flexible, soft heels (2) and is provided with outer and inner radial shoulders (3,3'). On its outer peripheral area (4), the support ring has a ring-shaped groove (5) which serves as a load relief groove and extends within the core area (A) of the support ring. The axial thickness (B) of the support ring is such that it adapts to the flange (7) plate angle of the screw (6) connection, within given tolerances. The soft heels may consist of a PTFE, graphite, fibre, Al or other material and the radial depth (a) of the relief groove may amount to 1/6 to 1/3 of the ring width (C). The groove may be located in the central axial plane (8) of the ring and the axial width (b) is such that the ring deformation sustains a maximum flange angle of both flanges by 1 grad. relative to the axial plane. A sheet metal plate (11) with axial play, may also be located within the groove.