Clamped flange fitting and assembly
AssigneeSwagelok Company
InventorsGerald A. Babuder, Ronald K. Fisher, Jr.
Life of this patent
Estimating the term…
Abstract
A clamped flange pipe or tube fitting assembly includes a resilient seal ring compressed in a chamber formed by cooperating recesses in opposed flanges. The chamber and seal ring are dimensionally related in a manner to produce circumferentially continuous, radially spaced primary and secondary seal areas and to assure a continuous interior surface between the connected pipes or tubes with no recesses to entrap process fluids.
Claims27
A flange joint and seal ring assembly for joining and sealing pipe or tube ends that define an axial flow passage therethrough, comprising:
- a first and second annular flange, each of said flanges being at a respective one of the tube ends;
- each flange having an opposed end face with side walls, each end face cooperating to define an annular sealing chamber and a circumferentially continuous groove opening radially inward from said sealing chamber to said axial flow passage;
- a gasket comprising a main body and a radially inward second portion in theuncompressed state;
- said main body of said gasket being positioned within the sealing chamber;
- wherein said sealing chamber and said groove define an axis and are symmetrical about a plane perpendicular to said axis;
- said second portion of said gasket being positioned within said groove and compressed to form a substantially flush bore line seal contiguous with the interior surfaces of the tubes;
- and
- said main body of said gasket having an interference fit with one of said flange side walls so that said gasket is retained on one of said flanges during assembly of the joint.
A flange joint and seal ring assembly for joining and sealing pipe or tube ends that define an axial flow passage therethrough, comprising:
- a first and second annular flange, each of said flanges being at a respective one of the tube ends;
- each flange having opposed end faces with side walls cooperating to define an annular recess comprising a seal chamber and a circumferentially continuous groove opening radially inward from said seal chamber to said axial flow passage;
- a gasket comprising a main body and a radially inward second portion in the uncompressed state;
- said gasket further comprising a rigid ring positioned within said second portion of said gasket so that said ring is isolated from said flow passage and being contained within said recess;
- said main body of said gasket being positioned within the seal chamber;
- and
- said second portion of said gasket being positioned within said groove and compressed to form a substantially flush bore line seal contiguous with the interior surfaces of the tubes.
A gasket for insertion into an annular recess of a flange joint assembly for joining axially aligned tube ends, the recess further comprising a seal chamber and a radially inward groove that is open to an interior flow passage of said tubes, the gasket comprising:
- a main body that seals said seal chamber and a second portion that extends from said main body into said groove and being compressed within said groove forming a flush boreline seal contiguous with the interior surfaces of said tubes;
- and
- said gasket comprising a rigid ring positioned within the interior of said second portion of said gasket so that said ring is isolated from said flow passage and being contained within said annular recess.
Dependencies are inferred from the claim text.