Baffles are plates fitted in the flue-gas path to direct gas across tube banks and limit bypass, so heat is transferred more evenly. Cassette baffles are fabricated as replaceable panel units, which makes them quicker to install or change during a shutdown.
Ruby Infra Projects manufactures cassette baffles in every grade, including SS 304, 304L, 309, 310, 316 and 321, for thermal power stations. Cutting, bending, rolling, grooving, welding and polishing are done in-house at Umbergaon, and material test certificates from Government or NABL-accredited laboratories are provided on every batch.
A baffle steers the flue gas where the boiler design needs it, and the cassette form makes it easy to change.
Where flue gas can slip past a tube bank, heat is not transferred as evenly as the design intends.
Baffle plates in the flue-gas path direct the gas across the tube banks and limit bypass.
Fabricated as replaceable panel units, cassette baffles are quicker to install or change during a shutdown.
These boiler spares do different jobs. Many plants use several together.
| Product | What it does | Where it goes |
|---|---|---|
| Cassette baffle | Directs flue gas across tube banks and limits bypass; made as replaceable panel units | In the flue-gas path across tube banks |
| Half round tube shield | Takes fly-ash erosion in place of the tube wall | Gas-facing side of tubes in a bank |
| Bend shield | Formed to follow a tube bend, where erosion is usually highest | Tube bends and elbows |
| Protective sleeve | Wraps the full circumference of a tube at a known wear location | Straight runs at hot spots |
Your boiler OEM drawings and inspection history show which parts are needed where.
The right grade depends on the metal and flue-gas temperature at each location. Confirm the grade with your boiler engineer.
| Grade | Why choose it | Typical zone |
|---|---|---|
| SS 304 / 304L | Good strength and corrosion resistance; 304L is the low-carbon version for welded fabrication | Lower-temperature zones |
| SS 309 (Cr23Ni13) | Higher chromium and nickel for better oxidation resistance than 304 at elevated temperature | Intermediate-temperature zones |
| SS 310 | About 24-26% Cr and 19-22% Ni: strong oxidation and scaling resistance at very high temperature | Hot gas-path zones |
| SS 316 / 316L | Molybdenum improves resistance to corrosive condensates and chlorides | Cold-end or corrosion-prone locations |
| SS 321 | Titanium-stabilised against intergranular corrosion after exposure to roughly 425-850 C | High-temperature service with sensitisation risk |
| Other grades | Any other grade can be made on request | Send your specification |
See also the grade guide on our half round tube shield page.
Baffles are plates fitted in the flue-gas path to direct gas across tube banks and limit bypass, so heat is transferred more evenly. Cassette baffles are fabricated as replaceable panel units, which makes them quicker to install or change during a shutdown.
Yes. Ruby Infra Projects manufactures cassette baffles in every grade at its GIDC Umbergaon works, to your drawing, sketch or sample, with custom sizes and cut-to-length service.
A baffle directs the flue gas across the tube banks and limits bypass. A tube shield, such as a half round shield or bend shield, covers the tube itself and takes the erosion from fly ash in place of the tube wall. Plants often use both.
Ruby Infra Projects makes cassette baffles in every grade your boiler needs, including SS 304, 304L, 309, 310, 316 and 321. The right grade depends on the metal and flue-gas temperature at each location, so confirm it with your boiler engineer.
A drawing or sample, panel length, width and thickness, material grade, quantity, required delivery date and destination. Material test certificates from Government or NABL-accredited laboratories are provided on every batch; state the certificate format you need.
Yes. Ruby Infra Projects supplies customers outside India as well as within India and holds an Import Export Code (IEC). Include the destination country or port and your preferred shipping terms, such as FOB or CIF, with your enquiry.