US3604587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multilayer pressure vessel
Assignee: Hahn and Clay
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Filing: 1969-04-07
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Granted: 1971-09-14
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Expires: 1989-04-07
Abstract
Abstract A multilayer pressure vessel and method of making same wherein the vessel has both a multilayer cylindrical body and at least one multilayer head, with an inner shell being formed of stainless steel or other metal resistant to hydrogen embrittlement and with the multilayer body and multilayer head being provided with means for relieving hydrogen pressure in the layers externally of the inner shell, whereby the outer layers may be ordinary carbon steel for both the body and the head without danger of hydrogen embrittlement.
Inventors
- 👤 Raymond E Pechacek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 01:04
CPC Classifications
F; F17; F17C; F17C1/00; F17C1/02; F17C1/04; B; B21; B21D; B21D51/00; B21D51/16; B21D51/24; B23; B23K; B23K9/00; B23K9/0026; B23K9/0035; F17C2201/00; F17C2201/01; F17C2201/0104; F17C2201/0109; F17C2203/00; F17C2203/06; F17C2203/0602; F17C2203/0604; F17C2203/0612; F17C2203/0614; F17C2203/0624; F17C2203/0634; F17C2203/0636; F17C2203/0639; F17C2203/0643; F17C2203/0648; F17C2209/00; F17C2209/22; F17C2209/221; F17C2221/00; F17C2221/01; F17C2221/012; F17C2223/00; F17C2223/01; F17C2223/0107; F17C2223/0123; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/32; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49865
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
281 words
A pressure vessel resistant to hydrogen embrittlement, comprising: a. a cylindrical body portion having an inner layer formed of an alloy of steel that is resistant to hydrogen embrittlement, a plurality of outer layers disposed in a prestressed condition outwardly of said inner layer and a vent layer formed between said inner layer and said outer layers; b. a vent passage extending through said outer layers and establishing communication from said vent layer to the area externally of the outermost of said outer layers to thereby relieve gas pressure externally of said inner layer; c. a first substantially hemispherical head having an inner substantially hemispherical head layer with an annular edge and formed of an alloy steel that is resistant to hydrogen embrittlement, a plurality of prestressed outer head layers each oF which is formed of a plurality of gores welded together at staggered welds and disposed outwardly of said inner layer, and a vent layer formed between said inner layer and said outer head layers; d. one end of said inner layer of said cylindrical body portion being welded to the annular edge of said inner layer of said hemispherical head to form an inner shell; e. said outer layers of said body portion and said outer layers of said head being welded together at each layer; and f. means establishing communication from said vent layer in said head to the area externally of said head to relieve gas pressure externally of said inner layer of said head, whereby said outer layers of said body portion and said head may be made of material which is not resistant to hydrogen embrittlement but which is thus substantially free of hydrogen embrittlement.
Claim 2
Dependent Claim
281 words
A pressure vessel resistant to hydrogen embrittlement, comprising: a. a cylindrical body portion having an inner layer formed of an alloy of steel that is resistant to hydrogen embrittlement, a plurality of outer layers disposed in a prestressed condition outwardly of said inner layer and a vent layer formed between said inner layer and said outer layers; b. a vent passage extending through said outer layers and establishing communication from said vent layer to the area externally of the outermost of said outer layers to thereby relieve gas pressure externally of said inner layer; c. a first substantially hemispherical head having an inner substantially hemispherical head layer with an annular edge and formed of an alloy steel that is resistant to hydrogen embrittlement, a plurality of prestressed outer head layers each oF which is formed of a plurality of gores welded together at staggered welds and disposed outwardly of said inner layer, and a vent layer formed between said inner layer and said outer head layers; d. one end of said inner layer of said cylindrical body portion being welded to the annular edge of said inner layer of said hemispherical head to form an inner shell; e. said outer layers of said body portion and said outer layers of said head being welded together at each layer; and f. means establishing communication from said vent layer in said head to the area externally of said head to relieve gas pressure externally of said inner layer of said head, whereby said outer layers of said body portion and said head may be made of material which is not resistant to hydrogen embrittlement but which is thus substantially free of hydrogen embrittlement.
Claim 3
Dependent Claim
31 words
The structure set forth in claim 1, wherein said means establishing communication from said vent layer in said head includes a vent passage extending through said outer layers of said head.
Claim 4
Dependent Claim
27 words
The structure set forth in claim 1, wherein said means establishing communication from said vent layer in said head includes said vent layer in said body portion.
Claim 5
Dependent Claim
106 words
The structure set forth in claim 1, wherein: a. said cylindrical body portion is made up of one or more cylinders welded together; and b. a second substantially hemispherical head at the opposite end of said body portion from said first head; c. said second head also being formed of an inner layer of hydrogen embrittlement resistant material, a plurality of outer layers, and a vent layer therebetween; d. said inner layer of said second head being welded to said inner layer of said cylindrical body portion; and e. said outer layers of said second head being welded to said outer layers of said body portion.
Claim 6
Dependent Claim
426 words
A pressure vessel resistant to hydrogen embrittlement, comprising: a. a cylindrical body portion having an inner layer formed of an alloy of steel that is resistant to hydrogen embrittlement, a plurality of outer layers disposed in a prestressed condition outwardly of said inner layer and a vent layer formed between said inner layer and said outer layers; b. a vent passage extending through said outer layers and establishing communication from said vent layer to the area externally of the outermost of said outer layers to thereby relieve gas pressure externally of said inner layer; c. a first substantially hemispherical head having an inner substantially hemispherical head layer with an annular edge and formed of an alloy steel that is resistant to hydrogen embrittlement, a plurality of prestressed outer head layers each of which is formed of a plurality of gores welded together at staggered welds and disposed outwardly of said inner layer, and a vent layer formed between said inner head layer and said outer head layers; d. one end of said inner layer of said cylindrical body portion being welded to the annular edge of said inner layer of said hemispherical head to form an inner shell; e. said outer layers of said body portion and said outer layers of said head being welded together at each layer; f. means establishing communication from said vent layer in said head to the area externally of said head to relieve gas pressure externally of said inner layers of said head, whereby said outer layers of said body portion and said head may be made of material which is not resistant to hydrogen embrittlement but which is thus substantially free of hydrogen embrittlement; g. said outer layers having an opening therethrough of one diameter; h. said inner shell having an opening of a smaller diameter than the diameter of said opening through said outer layers; i. a vessel fitting having a bore therethrough disposed in said opening in said outer layers and welded to said outer layers; j. said fitting having an inner annular end disposed over said inner shell with a vent layer therebetweEn; k. an inner bore liner of hydrogen embrittlement resistant material welded to said inner shell, and disposed in the bore of said fitting with a vessel fitting vent layer therebetween; and l. means establishing communication between said vessel fitting vent layer and the area externally of said fitting whereby said vessel fitting may be made of material which is not resistant to hydrogen embrittlement but which is thus substantially free of hydrogen embrittlement.
Claim 7
Dependent Claim
426 words
A pressure vessel resistant to hydrogen embrittlement, comprising: a. a cylindrical body portion having an inner layer formed of an alloy of steel that is resistant to hydrogen embrittlement, a plurality of outer layers disposed in a prestressed condition outwardly of said inner layer and a vent layer formed between said inner layer and said outer layers; b. a vent passage extending through said outer layers and establishing communication from said vent layer to the area externally of the outermost of said outer layers to thereby relieve gas pressure externally of said inner layer; c. a first substantially hemispherical head having an inner substantially hemispherical head layer with an annular edge and formed of an alloy steel that is resistant to hydrogen embrittlement, a plurality of prestressed outer head layers each of which is formed of a plurality of gores welded together at staggered welds and disposed outwardly of said inner layer, and a vent layer formed between said inner head layer and said outer head layers; d. one end of said inner layer of said cylindrical body portion being welded to the annular edge of said inner layer of said hemispherical head to form an inner shell; e. said outer layers of said body portion and said outer layers of said head being welded together at each layer; f. means establishing communication from said vent layer in said head to the area externally of said head to relieve gas pressure externally of said inner layers of said head, whereby said outer layers of said body portion and said head may be made of material which is not resistant to hydrogen embrittlement but which is thus substantially free of hydrogen embrittlement; g. said outer layers having an opening therethrough of one diameter; h. said inner shell having an opening of a smaller diameter than the diameter of said opening through said outer layers; i. a vessel fitting having a bore therethrough disposed in said opening in said outer layers and welded to said outer layers; j. said fitting having an inner annular end disposed over said inner shell with a vent layer therebetweEn; k. an inner bore liner of hydrogen embrittlement resistant material welded to said inner shell, and disposed in the bore of said fitting with a vessel fitting vent layer therebetween; and l. means establishing communication between said vessel fitting vent layer and the area externally of said fitting whereby said vessel fitting may be made of material which is not resistant to hydrogen embrittlement but which is thus substantially free of hydrogen embrittlement.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-13 | 1975-03-15 | 1975-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-13 | 1979-03-15 | 1979-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-13 | 1983-03-15 | 1983-09-14 | $7700.00 | Window Closed / Lapsed |