Flange fitting
AssigneeSpirax-Sarco Limited
InventorsCharles Zanettacci, Keith Farquhar
Life of this patent
Estimating the term…
Abstract
There is disclosed a flange fitting for a pipe comprising: a flange ring for locating around the pipe and having a plurality of angularly spaced fixing holes; and a retaining ring for locating around the pipe within a groove in the outer surface thereof which in use restricts axial movement of the flange ring on the pipe; wherein the retaining ring has a plurality of angularly spaced reduced-profile sectors in regions corresponding to the positions of the fixing holes.
Claims16
A flange fitting for a pipe comprising an outer surface, the flange fitting comprising:
- a flange ring configured to be located around the outer-surface of the pipe and having a plurality of angularly spaced fixing holes;
- and
- a retaining ring configured to be located within a groove in the outer surface of the pipe, which in use, restricts axial movement of the flange ring on the pipe, the retaining ring comprising:
- a plurality of angularly spaced reduced-profile sectors having a reduced outer-profile in regions corresponding to respective positions of the fixing holes of the flange ring when the flange ring is positioned around the outer surface of the pipe.
A flange assembly comprising:
- a pipe comprising an outer surface, the outer surface having a groove;
- a flange fitting, comprising:
- a flange ring located around the outer-surface of the pipe and having a plurality of angularly spaced fixing holes;
- and
- a retaining ring located within the groove in a manner that, in use, restricts axial movement of the flange ring on the pipe, the retaining ring comprising:
- a plurality of angularly spaced reduced-profile sectors having a reduced outer-profile in regions corresponding to respective positions of the fixing holes of the flange ring when the flange ring is positioned around the outer surface of the pipe.
A flange fitting for a pipe having an outer surface, the flange fitting comprising:
- a flange ring configured to be located around the outer surface of the pipe and having a plurality of angularly spaced fixing holes;
- and
- a retaining ring configured to be located within a groove in the outer surface of the pipe, which in use, restricts axial movement of the flange ring on the pipe;
- wherein the retaining ring has a plurality of angularly spaced reduced-profile sectors having a reduced outer-profile in regions corresponding to respective positions of the fixing holes of the flange ring when the flange ring is positioned around the outer surface of the pipe;
- wherein each reduced-profile sector has a cross-sectional area per unit angle less than the cross-sectional area per unit angle of the retaining ring as a whole;
- wherein the retaining ring comprises a plurality of first-type sectors and a plurality of second-type sectors alternately and angularly arranged, wherein the second-type sectors are the reduced-profile sectors and wherein an outer profile of the second-type sectors is reduced relative to the outer profile of the first-type sectors;
- wherein there are two first-type sectors and two second-type sectors;
- and
- wherein the retaining ring comprises two discrete parts.
Dependencies are inferred from the claim text.