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Tanvir Nickel Alloys is a leading manufacturer and supplier of Duplex Steel Flanges in Cairo, Egypt, offering high-quality, corrosion-resistant components engineered for strength, durability, and reliable performance. These flanges are precision-manufactured to meet international standards, ensuring leak-proof and secure connections in demanding industrial, marine, and offshore applications. Tanvir Nickel Alloys’ Duplex Steel Flanges are widely used in oil & gas, chemical, petrochemical, and desalination industries, where exposure to high pressure, corrosive media, and extreme temperatures requires materials with exceptional mechanical and corrosion-resistant properties.
Duplex Steel Flanges are typically made from S31803 or S32205 grades, containing approximately 22% chromium, 5–6% nickel, 3% molybdenum, with the remainder iron, and small additions of nitrogen to enhance strength and corrosion resistance. They provide a tensile strength of 620–850 MPa, excellent yield strength, and superior resistance to stress corrosion cracking, pitting, and crevice corrosion. The flanges also offer good ductility, toughness, and weldability, making them suitable for high-pressure and corrosive environments.
| 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 Tanvir Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Duplex Steel Flanges in Cairo, Egypt, providing cutting-edge solutions for all your piping needs. Our state-of-the-art production plants are strategically located in the Egypt, 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 extensively used in chemical processing, petrochemical, oil & gas, and offshore industries for connecting piping systems, pumps, valves, and heat exchangers. They are also employed in desalination plants, marine installations, and power generation facilities where strength, corrosion resistance, and durability are critical. These flanges provide secure, long-term, maintenance-free connections in high-pressure, high-temperature, and harsh industrial environments.