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At Nasir Nickel Alloys in Manama, Bahrain, Duplex Steel Flanges are designed to provide exceptional corrosion resistance, high mechanical strength, and long-term durability for critical industrial and marine applications. Manufactured from premium duplex stainless steel, these flanges feature a balanced austenitic-ferritic microstructure, offering excellent resistance to pitting, crevice corrosion, and stress corrosion cracking. Each flange is precision-engineered to ensure secure, leak-proof connections and consistent performance. Ideal for chemical, petrochemical, offshore, and high-pressure systems, Duplex Steel Flanges deliver reliable solutions for aggressive environments, ensuring safe, efficient, and long-lasting operation in demanding industrial applications.
Duplex Steel Flanges are composed of approximately 22% chromium, 5–6% nickel, 3% molybdenum, and nitrogen, providing superior resistance to chloride-induced corrosion, pitting, and stress corrosion cracking. The duplex microstructure enhances tensile and yield strength, toughness, and fatigue resistance under fluctuating pressures and elevated temperatures. These flanges maintain dimensional stability and structural integrity under thermal cycling and mechanical stress. Combining high mechanical strength with excellent corrosion resistance, Duplex Steel Flanges ensure reliable long-term performance, making them ideal for chemical, petrochemical, marine, and high-pressure industrial applications.
| Specifications | ASTM A182 / ASME SA182 |
| Size | 1/8″ NB TO 48″ NB |
| Standards | ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc. |
| Class / Pressure | 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc. |
| Standard | ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc. |
| Grades | S31803 / S32205 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61 |
| Grade | Duplex Steel Flanges |
|---|---|
| C | 0.030 max |
| Mn | 2.00 max |
| Si | 1.00 max |
| P | 0.030 max |
| S | 0.020 max |
| Cr | 22.0 – 23.0 |
| Mo | 3.0 – 3.5 |
| Ni | 4.50 – 6.50 |
| N | 0.14 – 0.20 |
| Fe | 63.72 min |
| Duplex Steel | Flanges |
|---|---|
| Density (g/cm 3) | 7.805 |
| Density (lb/in 3) | 0.285 |
| Melting Point (°C) | 1420 – 1465 |
| Melting Point (°F) | 2588 – 2669 |
At Nasir Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Duplex Steel Flanges in Manama, Bahrain, providing cutting-edge solutions for all your piping needs. Our state-of-the-art production plants are strategically located in the Bahrain, allowing us to maintain a vast inventory of over 16,000 tons of premium-quality materials readily available in stock. We are dedicated to delivering superior products and services, ensuring reliability and excellence for our global clientele.
Contact us to get a quick quote for your requirement.
Duplex Steel Flanges are widely used in industries requiring superior corrosion resistance, mechanical strength, and durability. They are ideal for chemical processing units, petrochemical plants, desalination facilities, offshore platforms, and power generation systems. Their resistance to chloride-induced corrosion, pitting, and stress corrosion cracking makes them suitable for marine and coastal environments. These flanges are used in high-pressure pipelines, heat exchangers, and process equipment handling aggressive chemicals. By providing secure, leak-proof connections and reliable performance under harsh conditions, Duplex Steel Flanges ensure safe, efficient, and long-lasting operation across chemical, petrochemical, marine, and industrial applications.
