Flange joint assembly for flammable liquid

Patent metadata

Field	Value
Publication number	US-2022010902-A1
Application number	US-202117482343-A
Country	US
Kind code	A1
Filing date	Sep 22, 2021
Priority date	Dec 13, 2016
Publication date	Jan 13, 2022
Grant date	—

Abstract

A flanged fitting includes an annular fitting flange having an annular end face. A glass liner lines a radially inner annular portion of the annular end face of the annular fitting flange. A radially outer annular portion of the annular end face of the annular fitting flange is free from the glass liner. The radially inner annular portion and the radially outer annular portion of the annular end face of the annular fitting flange define an annular gasket abutment face configured to seat a gasket thereon. An annular gasket includes an annular gasket layer. The annular gasket layer includes a radially inner annular gasket segment including a first material suitable for forming a liquid-tight seal with an opposing flange. A radially outer annular gasket segment surrounds the radially inner annular gasket segment. The radially outer annular gasket segment is fire-rated for forming a fire-rated seal with the opposing flange.

First claim

What is claimed is:

1 . An annular gasket for a flange joint assembly, the annular gasket comprising:
an annular gasket layer including
a radially inner annular gasket segment comprising a first material suitable for forming a liquid-tight seal with an opposing flange, wherein the radially inner annular gasket is not fire-rated,
and a radially outer annular gasket segment surrounding the radially inner annular gasket segment, wherein the radially outer annular gasket segment is fire-rated for forming a fire-rated seal with the opposing flange and the radially outer annular gasket segment is electrically conductive.

2 . The annular gasket set forth in claim 1 , wherein the annular gasket layer comprises two of the annular gasket layers generally opposing one another.

3 . The annular gasket set forth in claim 2 , wherein the annular gasket further includes an annular substrate sandwiched between the two annular gasket layers.

4 . The annular gasket set forth in claim 3 , wherein the annular substrate is corrugated radially.

5 . The annular gasket set forth in claim 2 , wherein the radially inner annular gasket segment comprises a fluoropolymer.

6 . The annular gasket set forth in claim 5 , wherein the radially inner annular gasket segment comprises expanded polytetrafluoroethylene (ePTFE).

7 . The annular gasket set forth in claim 1 , wherein the radially outer annular gasket segment comprises graphite.

8 . The annular gasket set forth in claim 7 , wherein the radially outer annular gasket segment comprises flexible graphite.

9 . The annular gasket set forth in claim 8 , wherein the radially inner annular gasket segment comprises a fluoropolymer.

10 . The annular gasket set forth in claim 4 , wherein the radially inner annular gasket segment of each of the annular gasket layers comprises a fluoropolymer, wherein the radially outer annular gasket segment of each of the annular gasket layers comprises graphite, wherein the annular substrate comprises at least one of nickel alloy, reactive metals, and alloys thereof.

Assignees

• Monsanto Technology Llc

Inventors

• Mcdaniel William Mark

Classifications

• F16L58/187

  for flanged joints · CPC title

• F16L23/125

  with an internal or external coating · CPC title

• F16L51/035

  for cancelling the axial loading resulting from fluid pressure · CPC title

• F16L23/24 Primary

  specially adapted for unequal expansion of the parts of the joint · CPC title

• F16J15/122 Primary

  generally parallel to the surfaces · CPC title