GB614120A - A process for protecting the heating surfaces of boiler and superheater tubes and economisers and oil and tar stills - Google Patents
A process for protecting the heating surfaces of boiler and superheater tubes and economisers and oil and tar stillsInfo
- Publication number
- GB614120A GB614120A GB2031746A GB2031746A GB614120A GB 614120 A GB614120 A GB 614120A GB 2031746 A GB2031746 A GB 2031746A GB 2031746 A GB2031746 A GB 2031746A GB 614120 A GB614120 A GB 614120A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tubes
- economisers
- boiler
- protecting
- oil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/10—Water tubes; Accessories therefor
- F22B37/107—Protection of water tubes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
- F16L58/04—Coatings characterised by the materials used
- F16L58/08—Coatings characterised by the materials used by metal
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/02—Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged in the boiler furnace, fire tubes, or flue ways
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
In a process for protecting the heating surfaces of boiler and superheater tubes and economisers and oil and tar stills, the tubes are first cleansed and preferably roughened, coated preferably by spraying with an aluminium-cadmium alloy containing preferably not more than 2 per cent of cadmium, heated to between 650 DEG C. and 1200 DEG C., allowed to cool and finally coated with an aqueous suspension of hydrated lime. The thickness of the alloy coating is between 0.002 and 0.015 inch and the suspension of lime which may contain up to 25 per cent of organic materials, e.g. glue or size and colloids to assist in its dispersion is applied when the tubes are preferably at about 260 DEG C., though it may be applied when the tubes are cold.ALSO:In a process for protecting the heating surfaces of boiler and superheater tubes economisers and oil and tar stills, the tubes are first cleaned and preferably roughened coated preferably by spraying with an aluminium-cadmium alloy containing preferably not more than 2 per cent of cadmium, heated to between 650 DEG C. and 1200 DEG C., allowed to cool and finally coated with an aqueous suspension of hydrated lime. The thickness of the alloy coating is between 0.002 and 0.015 inch and the suspension of lime which may contain up to 25 per cent of organic material, e.g. size or glue and colloids to assist in its dispersion is applied when the tubes are preferably at about 260 DEG C., though it may be applied when the tubes are cold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2031746A GB614120A (en) | 1946-07-08 | 1946-07-08 | A process for protecting the heating surfaces of boiler and superheater tubes and economisers and oil and tar stills |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2031746A GB614120A (en) | 1946-07-08 | 1946-07-08 | A process for protecting the heating surfaces of boiler and superheater tubes and economisers and oil and tar stills |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB614120A true GB614120A (en) | 1948-12-09 |
Family
ID=10143960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2031746A Expired GB614120A (en) | 1946-07-08 | 1946-07-08 | A process for protecting the heating surfaces of boiler and superheater tubes and economisers and oil and tar stills |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB614120A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2137488A1 (en) * | 1971-05-17 | 1972-12-29 | Chromalloy American Corp |
-
1946
- 1946-07-08 GB GB2031746A patent/GB614120A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2137488A1 (en) * | 1971-05-17 | 1972-12-29 | Chromalloy American Corp |
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