US3774281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of insulating a pipeline
Assignee: Atlantic Richfield Co
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Filing: 1971-11-08
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Granted: 1973-11-27
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Expires: 1991-11-08
Abstract
Abstract An insulating section and a method for insulating a length of pipe in northern regions subsequent to installation of the pipe is provided by a prefabricated pipe insulation system comprising (a) forming a cylindrical metallic outer jacket longitudinally flanged for seaming, (b) applying a layer of synthetic insulating foam to the interior of the outer jacket thereby forming insulating sections of insulating material adhering to an outer jacket, (c) placing said sections end-to-end longitudinally and circumferentially along the length of pipe, (d) providing batten straps, adaptable to mating with the longitudinal seam, around the pipe circumference and extending between adjacent seams of insulating sections, and (e) securing the insulating section against the pipe and the circumferential battens by forming the longitudinal seam which incorporates the battens. The pipe insulating system provides a means of forming pipe insulation sections in a mobile unit near the pipe location and is particularly applicable in northern regions to insulate newly laid or existing pipelines.
Inventors
- 👤 K Eliason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:18
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/02; F16L59/021; F16L59/025; B; B21; B21C; B21C37/00; B21C37/06; B21C37/08; B21C37/09; F16L59/028; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49428; Y10T29/49826; Y10T29/49908; Y10T29/49915
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
175 words
A method for insulating a length of pipe subsequent to installation of the pipe comprising a, Forming insulation sections in the shape of annular segments having (1) metallic outer jackets whose cross sections form circular arcs terminated in radially outwardly extending portions to form longitudinal flanges and (2) layers of synthetic insulating foam adhering to the interior surface of said outer jackets, the radial edges of said foam lying in the plane of the flanges, b. PlaciNg said sections end-to-end longitudinally and side-toside circumferentially along the length of pipe to form a continuous layer of insulation over the pipe with the flanges of circumferentially adjacent segments facing each other and in continuous relationship to form longitudinal seams, c. Placing coupling means for longitudinally adjacent sections along the pipe circumference extending over the circumferential seams formed by the abutment of the longitudinally adjacent sections, and d. Securing the circumferentially adjacent sections against the pipe by folding together each of the pairs of longitudinal flanges to form double fold standing rib seams having no exposed metal edges.
Claim 2
Independent Claim
175 words
A method for insulating a length of pipe subsequent to installation of the pipe comprising a, Forming insulation sections in the shape of annular segments having (1) metallic outer jackets whose cross sections form circular arcs terminated in radially outwardly extending portions to form longitudinal flanges and (2) layers of synthetic insulating foam adhering to the interior surface of said outer jackets, the radial edges of said foam lying in the plane of the flanges, b. PlaciNg said sections end-to-end longitudinally and side-toside circumferentially along the length of pipe to form a continuous layer of insulation over the pipe with the flanges of circumferentially adjacent segments facing each other and in continuous relationship to form longitudinal seams, c. Placing coupling means for longitudinally adjacent sections along the pipe circumference extending over the circumferential seams formed by the abutment of the longitudinally adjacent sections, and d. Securing the circumferentially adjacent sections against the pipe by folding together each of the pairs of longitudinal flanges to form double fold standing rib seams having no exposed metal edges.
Claim 3
Dependent Claim
20 words
A method according to claim 1 wherein said coupling means are batten straps adaptable to mating with the longitudinal seam.
Claim 4
Dependent Claim
20 words
A method according to claim 1 wherein the cylindrical surface of said section forms an arc of 180* or less.
Claim 5
Dependent Claim
15 words
A method according to claim 1 wherein said arc is between about 90* and 180*.
Claim 6
Dependent Claim
22 words
A method according to claim 1 wherein said outer jacket is selected from group consisting of aluminum, carbon steel, and stainless steel.
Claim 7
Dependent Claim
14 words
A method according to claim 1 wherein said synthetic insulating foam is a polyurethane.
Claim 8
Dependent Claim
21 words
A method according to claim 2 wherein a sponge-type gasket is provided between the batten strap and the metallic outer jacket.
Claim 9
Dependent Claim
17 words
The method of claim 2 wherein the edges of the batten strips are folded under 180* .
References Cited (Backward Citations)
US3010199A
Cited
US2857931A
Cited
US3026076A
Cited
US3222777A
Cited
US3359351A
Cited
US3563503A
Cited
US3613380A
Cited
US3642308A
Cited
US3648468A
Cited
US3729880A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |