ASTM A240 304L / 316L Baffle Plate | SA240 Stainless Steel Heat Exchanger Baffle Plates
ASTM A240 304L and ASTM A240 316L baffle plates are precision-machined stainless steel components widely used in shell and tube heat exchangers, boilers, condensers, pressure vessels, and industrial process equipment. Designed to support tube bundles and direct shell-side fluid flow, baffle plates significantly improve heat transfer efficiency, reduce vibration, and extend equipment service life.
Manufactured from high-quality SA240 304L, SA240 316L, duplex stainless steel, carbon steel, or nickel alloy plates, our baffle plates are supplied according to customer drawings, TEMA requirements, and heat exchanger design specifications.
We are a professional manufacturer and exporter of stainless steel baffle plates, tube sheets, support plates, sealing strips, and internal heat exchanger components in China.
What Is a Baffle Plate?
A baffle plate is an internal component installed inside a shell-and-tube heat exchanger or pressure vessel.
Its primary functions are:
- Supporting tube bundles
- Preventing tube vibration
- Directing shell-side fluid flow
- Increasing turbulence
- Improving heat transfer efficiency
- Reducing dead zones inside the shell
Without properly designed baffles, fluid may flow directly through the shell without sufficient contact with the tube surface, resulting in poor heat transfer performance.
Heat Exchanger Baffle Plates
Tube Bundle Support
Baffle plates provide structural support to heat exchanger tubes and prevent sagging during operation.
Enhanced Heat Transfer
By forcing the shell-side fluid to flow across the tube bundle multiple times, baffles create turbulence that improves heat transfer coefficients.
Vibration Reduction
Flow-induced vibration is one of the primary causes of tube failure. Properly designed baffle plates minimize vibration and extend exchanger life.
Improved Flow Distribution
Baffles eliminate stagnant zones and ensure more uniform fluid distribution throughout the shell.
ASTM A240 304L Stainless Steel Baffle Plates
ASTM A240 Type 304L stainless steel is the most commonly used material for heat exchanger baffle plates.
Advantages
- Excellent corrosion resistance
- Good weldability
- Low carbon content
- Cost-effective solution
- Suitable for water, steam, and general process media
Material Specification
| Grade | UNS |
|---|---|
| ASTM A240 304L | S30403 |
| ASME SA240 304L | S30403 |
| EN 1.4307 | X2CrNi18-9 |
Chemical Composition (%)
| C | Mn | Si | Cr | Ni |
|---|---|---|---|---|
| ≤0.03 | ≤2.00 | ≤0.75 | 18.0–20.0 | 8.0–12.0 |
ASTM A240 316L Stainless Steel Baffle Plates
ASTM A240 316L baffle plates contain molybdenum, providing superior resistance to pitting and crevice corrosion in chloride-containing environments.
Advantages
- Superior chloride resistance
- Marine environment suitability
- Excellent corrosion resistance
- Long service life
- Better performance than 304L in aggressive media
Material Specification
| Grade | UNS |
|---|---|
| ASTM A240 316L | S31603 |
| ASME SA240 316L | S31603 |
| EN 1.4404 | X2CrNiMo17-12-2 |
Chemical Composition (%)
| C | Cr | Ni | Mo |
|---|---|---|---|
| ≤0.03 | 16.0–18.0 | 10.0–14.0 | 2.0–3.0 |
304L vs 316L Baffle Plates
| Property | 304L | 316L |
|---|---|---|
| Corrosion Resistance | Excellent | Superior |
| Chloride Resistance | Moderate | Excellent |
| Seawater Service | Limited | Recommended |
| Cost | Lower | Higher |
| Heat Exchanger Use | General Service | Chemical & Marine Service |
For seawater coolers, offshore heat exchangers, and chemical process equipment, ASTM A240 316L is generally preferred.
Available Materials for Baffle Plates
Stainless Steel
- ASTM A240 304
- ASTM A240 304L
- ASTM A240 316
- ASTM A240 316L
- ASTM A240 321
- ASTM A240 347
Duplex Stainless Steel
- ASTM A240 UNS S31803
- ASTM A240 UNS S32205
- ASTM A240 UNS S32750
- ASTM A240 UNS S32760
Manufacturing Capabilities
Our baffle plates can be supplied as:
- Single segmental baffles
- Double segmental baffles
- Triple segmental baffles
- Disc and doughnut baffles
- Orifice baffles
- Support plates
- Tube support plates
Manufacturing processes include:
- CNC plasma cutting
- Laser cutting
- Waterjet cutting
- CNC drilling
- CNC machining
Inspection & Testing
All stainless steel baffle plates can be supplied with:
- PMI Testing
- Chemical Analysis
- Dimensional Inspection
- Flatness Inspection
- Surface Finish Inspection
- Ultrasonic Testing (UT)
- EN10204 3.1 Certification
Third-party inspection available:
- BV
- TUV
- SGS
- Lloyd’s Register
Applications
Shell & Tube Heat Exchangers
The most common application for stainless steel baffle plates.
Boilers
Used as support plates and flow-directing components.
Pressure Vessels
Internal flow control and structural support.
Petrochemical Plants
Heat recovery systems and process exchangers.
Marine & Offshore Equipment
Seawater coolers, condensers, and offshore heat exchangers.
Power Generation
Condensers, feedwater heaters, and cooling systems.
Related Products
- Tube Sheets
- Heat Exchanger Tubes
- Tube Support Plates
- Sealing Strips
- Impingement Plates
- ASTM A240 316L Tube Sheet
- ASTM A240 304L Tube Sheet
- ASTM A516 Gr.70 Tube Sheet
- UNS S32750 Tube Sheet
- CuNi 90/10 Tube Sheet
