Patent US4396054A successfully refreshed from Google Patents.
US4093760A
Expired / Lapsed
US
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Skid pipe insulation for steel mill reheating furnaces
Assignee: Morgan Advanced Materials PLC
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Filing: 1976-05-26
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Granted: 1978-06-06
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Expires: 1996-05-26
Abstract
Abstract A method is described for the thermal insulation of steel mill reheat furnace skid pipes, which comprises adhering to the pipes an unbonded, unreinforced batt of refractory fiber, and, preferably, thereafter applying a layer of refractory cement to the top of the adhered batt. The insulation structure formed by this method is also described.
Inventors
- 👤 Martin Bernard O'Malley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 06:36
CPC Classifications
F; F27; F27D; F27D3/00; F27D3/02; F27D3/022; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1028; Y10T156/1033; Y10T428/00; Y10T428/13; Y10T428/131; Y10T428/1314
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
53 words
The method of insulating a steel mill reheat furnace skid pipe which comprises adhering to said skid pipe an unbonded, unreinforced batt of refractory fiber, said batt being disposed in adhered position so that no significant portion thereof extends above the level of the top of the rail projection of said skid pipe.
Claim 2
Independent Claim
53 words
The method of insulating a steel mill reheat furnace skid pipe which comprises adhering to said skid pipe an unbonded, unreinforced batt of refractory fiber, said batt being disposed in adhered position so that no significant portion thereof extends above the level of the top of the rail projection of said skid pipe.
Claim 3
Dependent Claim
31 words
The method of claim 1 wherein said batt of refractory fiber is adhered to said skid pipe by a layer of adhesive applied to the outer surface of said skid pipe.
Claim 4
Dependent Claim
12 words
the method of claim 2 wherein said adhesive is an inorganic material.
Claim 5
Dependent Claim
28 words
The method of claim 1 wherein said batt of refractory fiber has a thickness measured radially of said skid pipe on the order of 1/2 to 2 inches.
Claim 6
Dependent Claim
22 words
The method of claim 4 wherein the thickness of said batt of insulation is on the order of 3/4 to 11/2 inch.
Claim 7
Dependent Claim
15 words
The method of claim 1 wherein said refractory fiber comprises fiber of predominately aluminosilicate composition.
Claim 8
Dependent Claim
22 words
The method of claim 6 wherein said aluminosilicate fiber is formed from a melt of approximately equal amounts of alumina and silica.
Claim 9
Dependent Claim
23 words
The method of claim 7 wherein said aluminosilicate fiber also contains up to approximately 10% of at least one additional refractory metal oxide.
Claim 10
Dependent Claim
25 words
The method of claim 1 wherein said batt of refractory fiber has a density in the range of from 3 to 24 lbs/ft 3 .
Claim 11
Dependent Claim
24 words
The method of claim 9 wherein said batt of refractory fiber has a density in the range of 3 to 10 lbs/ft 3 .
Claim 12
Dependent Claim
19 words
The method of claim 1 further comprises applying to the top of said batt a layer of refractory cement.
Claim 13
Dependent Claim
19 words
An insulating structure for a steel mill reheat furnace skid pipe formed according to the method of claim 1.
Claim 14
Dependent Claim
19 words
An insulating structure for a steel mill reheat furnace skid pipe formed according to the method of claim 11.
References Cited (Backward Citations)
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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) | 1981-06-05 | 1981-12-05 | 1982-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-05 | 1985-12-05 | 1986-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-05 | 1989-12-05 | 1990-06-06 | $7700.00 | Window Closed / Lapsed |