Gasket assembly for pipe flanges

Claim 2

A gasket assembly for raised face pipe flanges comprising: a sealing portion having an outer diameter and an inner diameter and being adapted to be positioned in Sealing engagement between opposed faces of abutting pipe flanges; an annular positioning member engaging said outer diameter of said sealing portion so as to be removably affixed to and surrounding said sealing portion, said annular positioning member defining a plurality of arc segments of at least two radii, all having a common center substantially concentric to said sealing portion, said plurality of arc segments collectively defining at least two outer circumferences which respectively mate with the bolt circles of flanges adapted for different pressures to which the flanges are to be subjected.

Claim 3

A gasket assembly for raised face pipe flanges comprising: a sealing portion having an outer diameter and an inner diameter and being adapted to be positioned in sealing engagement between opposed faces of abutting pipe flanges; an annular positioning member, said annular positioning member having an inside diameter removably frictionally mated with the outside diameter of said sealing portion; said positioning member being a one piece member and having annularly separable portions to provide a plurality of outside circumferences mateable with the inside diameter of bolt circles of different diameters, said annularly separable portions being integrally joined and separable by breaking in a region therebetween.

Claim 4

A gasket assembly for raised face pipe flanges comprising: a sealing portion having an outer diameter and an inner diameter and being adapted to be positioned in sealing engagement between opposed faces of abutting pipe flanges; an annular positioning member, said annular positioning member having an inside diameter removably frictionally mated with the outside diameter of said sealing portion; said positioning member being a one piece member and having annularly separable portions to provide a plurality of outside circumferences mateable with the inside diameter of bolt circles of different diameters, said annularly separable portions being integrally joined and separable by breaking in a region therebetween.

Claim 5

A gasket assembly for sealing pipe flanges comprising: an annular sealing portion adapted to be positioned between the interfaces of opposed pipe flanges, said annular sealing portion having a supporting member of substantially uniform thickness with an outside diameter, an inside diameter and first and second faces, said supporting member having a pair of oppositely directed grooves, one on each of said faces, said grooves being radially spaced apart and each containing therein a deformable sealing material; a one piece positioning member, said positioning member being annular in configuration and having an inside diameter removably mated with the outside diameter of said sealing annulus, said positioning member including inner and outer concentric annuli whereby the outer diameter of the outer annulus is mateable within a bolt circle of first diameter and the outer diameter of the inner annulus is mateable within a bolt circle of second diameter less than the first diameter; and, means for separating said inner and outer annuli.

Claim 6

A gasket assembly for sealing pipe flanges comprising: an annular sealing portion adapted to be positioned between the interfaces of opposed pipe flanges, said annular sealing portion having a supporting member of substantially uniform thickness with an outside diameter, an inside diameter and first and second faces, said supporting member having a pair of oppositely directed grooves, one on each of said faces, said grooves being radially spaced apart and each containing therein a deformable sealing material; a one piece positioning member, said positioning member being annular in configuration and having an inside diameter removably mated with the outside diameter of said sealing annulus, said positioning member including inner and outer concentric annuli whereby the outer diameter of the outer annulus is mateable within a bolt circle of first diameter and the outer diameter of the inner annulus is mateable within a bolt circle of second diameter less than the first diameter; and, means for separating said inner and outer annuli.

Claim 7

The apparatus as defined in claim 3 in which the inner and outer annuli are connected by a series of fracturable connections.

Claim 8

The apparatus as defined in claim 3 in which the outer peripheral edge of the outer annulus defines a plurality of arc segments of at least two radii, all having a common center substantially concentric to said sealing portion, said plurality of arc segments collectively defining at least two circumferences of different diameters each circumference being mateable with a bolt circle of different diameter.

Claim 9

The apparatus as defined in claim 3 wherein the outer annulus has an outermost peripheral diameter mateable with a bolt circle of first diameter, a series of notches in said outer periphery, said notches being mateable with a second bolt circle of lesser diameter than said first bolt circle.

Claim 10

The apparatus as defined in claim 6 in which said positioning member is formed of molded plastic.

Claim 11

The apparatus as defined by claim 7 in which the separable annuli of said positioning member are connected by fracturable beads.