316L Tube Sheet Flange is a critical component in heat exchangers, condensers, and pressure vessels, designed to secure tubes while maintaining a leak-proof seal. Made from ASTM A182 F316L stainless steel, it offers superior corrosion resistance, weldability, and low-carbon stability, making it ideal for aggressive chemical, marine, and high-purity applications.
Key Features & Benefits
Excellent Corrosion Resistance
Resists chlorides, acids (H₂SO₄, HCl), and seawater better than 304/304L.
Low carbon content (<0.03%) prevents sensitization (chromium carbide precipitation) during welding.
High-Temperature Performance
Serviceable up to 870°C (intermittent) / 450°C (continuous).
Maintains strength in steam, boiler, and thermal oil systems.
Precision Machining
Laser-cut or CNC-drilled holes for exact tube alignment (OD tolerances ±0.1mm).
Smooth surface finish (Ra ≤ 1.6 μm) to minimize crevice corrosion.
Compatibility
Pairs with 316L tubes for uniform galvanic properties.
Used in ASME Section VIII Div. 1 pressure vessels.
Material Standards & Certifications
| Standard | Grade | Key Properties | Common Forms |
|---|---|---|---|
| ASTM A182 | F316L | Forged flange material | Weld Neck, Slip-On, Blind |
| ASTM A240 | 316L | Plate/sheet for tube sheets | Laser-cut, drilled |
| EN 10088-2 | 1.4404 | European equivalent (PED compliant) | Heat exchanger designs |
Design Parameters
Hole Patterns: Triangular, square, or rotated layouts per TEMA (Tubular Exchanger Manufacturers Association) standards.
Thickness: Typically 1.5x tube OD (e.g., 25mm for 19mm tubes).
Ligament Efficiency: Minimum 15–20% between holes for structural integrity.
Applications
Chemical Processing – Reactors, acid coolers.
Power Plants – Condensers, feedwater heaters.
Pharmaceutical – Sterile heat exchangers (FDA-compliant).
Marine & Offshore – Seawater desalination units.
Submit your project requirements now and our material specialists will respond within 24 hours with tailored solutions.
