SS / Duplex & Super Duplex Threaded Flange
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SS / Duplex and Super Duplex Threaded Flange
EBY Fasteners delivers superior SS / Duplex and Super Duplex Threaded Flanges engineered for reliability in challenging environments. Our stainless steel (SS) threaded flanges offer a strong, leak-tight connection and excellent resistance to corrosive elements, making them ideal for piping systems in chemical plants, offshore installations, and industrial settings
When performance truly matters, turn to our Duplex and Super Duplex Threaded Flanges. Duplex flanges merge the advantages of ferritic and austenitic stainless steels, delivering superior resistance to chloride stress cracking for increased resilience. Super Duplex flanges stand as the pinnacle of corrosion resistance, ensuring long-term performance in the harshest settings where pitting, crevice corrosion, and general corrosion are major concerns
EBY Fasteners is your reliable partner for SS / Duplex and Super Duplex Threaded Flanges. We stock a wide range of sizes and specifications to meet your diverse requirements. Our focus on quality and customer service means you not only get exceptional flanges but also the support needed to guarantee a smooth installation process
EBY Fasteners is your reliable partner for SS / Duplex and Super Duplex Threaded Flanges. We stock a wide range of sizes and specifications to meet your diverse requirements. Our focus on quality and customer service means you not only get exceptional flanges but also the support needed to guarantee a smooth installation process
- ASTM A182 : This standard covers forged or rolled alloy and stainless steel flanges, fittings, valves, and parts for high-temperature or general pressure service. It defines the different grades of stainless steel used in flange manufacturing.
- ASTM A240 : This standard covers plate, sheet, and strip variations of stainless steel for use in pressure vessels or general applications. It outlines chemical compositions and mechanical properties.
- F44, F45, F51, F53, F55, F60, F61 : Represent varying Duplex and Super Duplex stainless steel grades, each with distinct chemical compositions and strengths, tailored to different levels of corrosion resistance.
- 304/304L/304H : Austenitic stainless steels, with 304 being the base grade. 304L has lower carbon for better weldability, and 304H has higher carbon for strength at elevated temperatures.
- 316/316L/316Ti : Austenitic stainless steels with added molybdenum for increased corrosion resistance, especially to chlorides. The "L" version has lower carbon, and the "Ti" version has titanium for stabilization.
- 310/310S : Higher chromium and nickel austenitic stainless steels for high-temperature resistance and oxidation resistance
- Materials : Stainless steel threaded flanges are typically found in 304, 304L, 316, and 316L grades. Duplex and Super Duplex flanges utilize specialized grades (like F51, F55, F60) for enhanced corrosion resistance, with Super Duplex grades offering the ultimate protection.
- Pressure Ratings : Standard stainless steel flanges are commonly rated for 150#, 300#, and potentially higher pressure classes. Duplex and Super Duplex flanges boast increased strength, allowing them to handle even higher pressure ratings.
- Sizes : Threaded flanges, regardless of material type, come in a wide range of nominal pipe sizes (NPS) to ensure compatibility with standard piping systems.
- Thread Types : NPT (National Pipe Taper) threads are the most common for threaded flanges, providing a tight seal. However, specific applications might call for other specialized thread types.
- Applications : Stainless steel threaded flanges are suitable for environments requiring moderate corrosion resistance, pressure handling, and ease of installation. Duplex and Super Duplex threaded flanges excel in extreme environments with harsh chemicals, seawater, or demanding conditions, where superior corrosion resistance and strength are crucial
- Corrosion Resistance : Duplex/Super Duplex: Provide exceptional resistance to various corrosion types, including pitting, crevice corrosion, and chloride stress corrosion cracking. Super Duplex grades are the top choice for extremely harsh environments.
- Strength : Possess even higher strength compared to standard stainless steel grades, allowing them to handle more demanding pressure requirements.
- Ease of Installation : Threaded flanges offer simpler installation and replacement compared to weld neck flanges, requiring only appropriate sealing and tightening.
- Versatility : Available in a range of sizes (NPS) and pressure ratings to suit various applications.
- Superior Performance in Harsh Environments : These flanges are designed to withstand aggressive chemicals, seawater, and extreme operating conditions where standard stainless steel might fail.
- Longer Service Life : Their exceptional corrosion resistance and strength translate to a longer lifespan and reduced maintenance costs
- Refinery & Petrochemical : These flanges find use in less critical process lines handling less aggressive fluids, utility lines for cooling water or steam transport, and smaller heat exchangers where moderate corrosion resistance is sufficient.
- Chemical : They are suitable for pipelines carrying moderately corrosive chemicals, non-critical storage tanks, and utility systems handling water, steam, or compressed air. Consider them where ease of installation and maintenance is a factor.
- Oil & Gas : Super Duplex threaded flanges are valuable in onshore gathering and distribution lines where corrosive fluids are present. They also find use in utility systems handling water, compressed air, and other non-critical process fluids.
- Power Plant : These flanges are primarily employed in cooling water systems where their resistance to corrosion and ease of installation are advantageous. Additionally, they can be used in auxiliary piping systems for lubrication, fuel transfer, or other less critical fluids.
- Offshore Platforms : Super Duplex threaded flanges are crucial in utility pipelines like firewater, seawater intake, and non-critical process lines due to their superior corrosion resistance in the harsh marine environment. They also ensure long-term reliability in ballast systems that handle seawater.
- Ship Building : Ideal for ballast water systems where Super Duplex provides unmatched protection against seawater corrosion. They can also be considered for less critical utility lines, such as fuel oil transfer or cooling water systems, within the ship.
- Industrial Machineries : Employed for connecting pipes and tubes in various industrial machines where moderate corrosion resistance and pressure handling capabilities are needed.
- Pharmaceuticals : Used in pipelines and vessels handling less aggressive process chemicals within pharmaceutical production facilities, ensuring product purity.
- Pumps & Compressors : These flanges provide secure and reliable connections within piping systems associated with pumps and compressors, ensuring the continuous flow of fluids.
- Dairy & Food : Utilized in pipelines and food processing equipment where hygiene standards are paramount, and moderate resistance to corrosive substances is required.
- Sugar Mills : Suitable for pipelines and equipment handling process fluids with moderate corrosivity, ensuring reliable operation within the sugar production process.
- Textile Machineries : Used for connecting pipes and tubes in various textile machines, particularly where some level of corrosion resistance is required due to the chemicals or dyes used in the textile process.
- Fertilizers & Pesticides : Employed in pipelines and vessels handling less aggressive fertilizer and pesticide solutions, where their corrosion resistance contributes to the safe handling of these chemicals
Chemical Composition
| Element | Weight % |
|---|---|
| Chromium (Cr) | 25% |
| Nickel (Ni) | 7% |
| Molybdenum (Mo) | 4% |
| Nitrogen (N) | 0.27% |
| Carbon © | 0.03% max |
| Manganese (Mn) | 1.2% max |
| Silicon (Si) | 0.8% max |
| Phosphorus (P) | 0.035% max |
| Sulfur (S) | 0.015% max |
