Stainless Steel Flanges
Stainless Steel Flanges are essential components used to connect pipes, valves, pumps, and other equipment in a piping system. Manufactured from high-quality stainless steel grades, these flanges provide secure, leak-proof connections while offering excellent corrosion resistance, durability, and strength. They are widely used in industries such as oil & gas, petrochemicals, power generation, pharmaceuticals, food processing, and marine applications.
By using stainless steel flanges, pipelines can be easily assembled, disassembled, inspected, cleaned, and maintained without damaging the piping system.
Key Features of Stainless Steel Flanges
Corrosion Resistance: Excellent protection against rust, pitting, and oxidation in aggressive environments.
High Strength: Capable of withstanding high pressure and extreme temperature conditions.
Leak-Proof Connections: Ensures tight sealing for safe and reliable operation.
Versatility: Available in multiple grades, pressure ratings, and designs.
Hygienic & Easy to Clean: Suitable for food, beverage, and pharmaceutical applications.
Durability: Long service life, even in harsh environments such as offshore and chemical plants.
Types of Stainless Steel Flanges
We offer a complete range of stainless steel flanges designed to suit various industrial requirements:
Weld Neck Flanges (WN): Ideal for high-pressure and high-temperature applications.
Slip-On Flanges (SO): Easy to install and widely used for low-pressure piping.
Socket Weld Flanges (SW): Suitable for small diameter, high-pressure pipelines.
Blind Flanges (BL): Used to seal the ends of piping systems or pressure vessels.
Lap Joint Flanges (LJ): Used with stub ends for systems requiring frequent dismantling.
Threaded Flanges (TH): Ideal for non-welded connections in small diameter piping.
Orifice Flanges: Designed for flow measurement applications.
Long Weld Neck Flanges (LWN): Used in high-pressure and high-temperature conditions.
Spectacle Blind Flanges: Used for maintenance and inspection in pipelines.
Available Grades of Stainless Steel
Austenitic Stainless Steel: SS 304, SS 304L, SS 316, SS 316L, SS 321, SS 347
Duplex & Super Duplex Stainless Steel: UNS S31803, S32205, S32750, S32760
Ferritic & Martensitic Stainless Steel: SS 410, SS 430, SS 446
High-Performance Alloys: SS 904L and other specialized grades for critical applications
Standards, Sizes & Specifications
Standards: ASME/ANSI B16.5, B16.47, MSS-SP-44, API 605, DIN, EN, JIS, BS
Size Range: ½” to 48” (custom sizes available)
Pressure Ratings: Class 150, 300, 600, 900, 1500, 2500
Facing Types: Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ)
End Finishes: Serrated, Smooth, Stock, or Custom
Applications of Stainless Steel Flanges
Due to their superior corrosion resistance, strength, and versatility, stainless steel flanges are widely used in:
Oil & Gas Industry: Offshore pipelines, refineries, and petrochemical plants
Chemical Processing: Acidic and alkaline environments, reactors, and vessels
Power Generation: Boilers, turbines, and nuclear power plants
Marine Industry: Shipbuilding, seawater piping, and desalination plants
Food & Beverage Industry: Hygienic piping systems for breweries, dairies, and food plants
Pharmaceutical Industry: Sterile and contamination-free piping systems
Water Treatment Plants: High-quality water distribution and processing systems
Quality Assurance & Testing of Stainless Steel Flanges
All stainless steel flanges are manufactured and tested under strict quality standards to ensure reliability:
Hydrostatic Pressure Testing
Non-Destructive Testing (NDT): Ultrasonic, Radiography, Dye Penetrant
Positive Material Identification (PMI)
Tensile & Hardness Testing
Dimensional & Visual Inspection
Why Choose Our Stainless Steel Flanges?
Wide range of sizes, grades, and pressure classes in stock
Precision-engineered products with strict quality control
Custom manufacturing available as per client drawings and specifications
Competitive pricing with reliable global supply chain
Export-quality packaging for safe delivery worldwide
Conclusion
Stainless Steel Flanges play a crucial role in ensuring strong, leak-proof, and corrosion-resistant connections in piping systems. Their adaptability to different industrial environments, combined with durability and ease of maintenance, makes them the preferred choice across multiple sectors. Whether used in oil & gas refineries, chemical plants, power generation facilities, or food and pharmaceutical processing, stainless steel flanges deliver unmatched reliability, safety, and long-term performance.
By choosing stainless steel flanges, you ensure efficiency, safety, and longevity in your piping infrastructure while benefiting from the versatility and strength of one of the most trusted materials in the industry.
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Explore moreFAQs - Stainless Steel Flanges
SS 304L has a lower carbon content (0.035% max vs. 0.08% max in 304), which helps reduce carbide precipitation during welding. This makes it ideal for applications where welding is required without compromising corrosion resistance.
SS 304H contains a higher carbon level (up to 0.10%), providing improved strength at elevated temperatures. It's commonly used in heat exchangers, boilers, and pressure vessels operating above 500°C.
SS 310 and 310S have high chromium (24–26%) and nickel (19–21%) content, offering excellent oxidation resistance and strength at high temperatures. SS 310S has lower carbon for better weldability.
Molybdenum (2–3%) enhances resistance to pitting, crevice corrosion, and chlorides. SS 316L, with lower carbon, is better suited for welded structures in marine and chemical environments.
Titanium stabilizes the alloy by preventing carbide formation during welding, maintaining corrosion resistance at high temperatures. It's used in exhaust systems, pressure vessels, and aircraft parts.
SS 904L is a high-alloy austenitic stainless steel with high nickel (23–28%), molybdenum (4–5%), and added copper (1–2%). It offers excellent resistance to sulfuric acid, seawater, and chloride stress corrosion.
SS 317/317L have higher chromium (18–20%) and molybdenum (3–4%) content than SS 316, offering improved corrosion resistance in acidic and aggressive environments. 317L has lower carbon for better weldability.
SS 446, a ferritic stainless steel, withstands temperatures up to 1510°C. With 23–30% chromium and no nickel, it provides outstanding resistance to scaling and oxidation at high temperatures.
Tensile Strength: 75,000 psi (515 MPa)
Yield Strength: 30,000 psi (205 MPa)
Elongation: 35%
Melting Point: ~1400 °C (2550 °F)
Density: 8.0 g/cm³
SS 347H has a higher carbon content (0.04–0.10%) compared to standard 347. This improves creep strength, making it suitable for high-temperature service, like in reactors and boilers.