Vented fitting for pressure vessel boss

Patent metadata

Field	Value
Publication number	US-2020200328-A1
Application number	US-202016809777-A
Country	US
Kind code	A1
Filing date	Mar 5, 2020
Priority date	Mar 16, 2016
Publication date	Jun 25, 2020
Grant date	—

Abstract

An apparatus is configured to be positioned between a boss and a shell of a pressure vessel. The boss includes a bore therethrough, and the bore has a longitudinal axis. The apparatus includes an annular body and a gas permeable feature. The annular body includes an inner surface configured to abut the boss and an outer surface configured to abut the shell. The annular body has opposite first and second ends relative to the longitudinal axis. The gas permeable feature is provided on the inner surface and extends at least from the first end to the second end. The disclosure also describes a pressure vessel including a shell, and boss, and an apparatus positioned between the boss and the shell. A method for forming a pressure vessel includes mounting a boss on a mandrel, positioning an annular fitting about a neck of the boss, forming a liner, and forming an outer shell.

First claim

1 .- 12 . (canceled)

13 . A method for forming a pressure vessel including:
mounting a boss on a mandrel, the boss having a boss neck, the boss neck having a bore with a longitudinal axis; positioning an annular fitting about the boss neck, the fitting including:
opposite first and second ends relative to the longitudinal axis;
a fitting neck adjacent the first end; and
a fitting flange adjacent the second end, wherein the fitting flange extends away from the longitudinal axis relative to the fitting neck;
forming a liner of the pressure vessel in contact with the boss; and forming an outer shell surrounding the liner and the fitting; wherein a gas permeable features extends at least from the first end to the second end.

14 . The method of claim 13 , wherein positioning the annular fitting about the boss neck occurs before forming the liner.

15 . The method of claim 13 , wherein positioning the annular fitting about the boss neck occurs after forming the liner.

16 . The method of claim 13 , wherein forming the liner includes disposing a non-metallic material around the mandrel and at least the portion of a boss flange.

17 . The method of claim 13 , further including positioning the gas permeable feature on the liner before positioning the annular fitting about the neck of the boss.

18 . The method of claim 13 , wherein forming the liner includes abutting the liner against the second end of the fitting.

19 . The method of claim 13 , wherein the boss comprises a boss flange, and wherein forming the liner includes disposing liner material on at least a portion of the boss flange.

20 . The method of claim 13 , wherein providing the gas permeable feature includes imparting a channel on a surface of the fitting.

21 . The method of claim 20 , wherein the surface of the fitting contacts the boss.

22 . The method of claim 13 , wherein providing the gas permeable feature includes imparting a plurality of channels, evenly radially spaced, on a surface of the fitting.

Assignees

• Hexagon Technology As

Inventors

• Yeggy Brian
• Byerly Duane V

Classifications

• Y02E60/32

  Hydrogen storage · CPC title

• F17C1/06 Primary

  built-up from wound-on bands or filamentary material, e.g. wires · CPC title

• B29K2023/065

  HDPE, i.e. high density polyethylene · CPC title

• B29C2045/14368

  holes with means for anchoring the injected material · CPC title

• B29C2045/1436

  coating hollow articles having holes passing through the wall · CPC title