A Flangeolet (Flange-outlet) is also called Nipoflange or Weldoflange, its shape looks like a Long weld neck flange. It could be regarded as a combination of a long weld neck flange and a weldolet , or a nipolet welded with a weld neck flange.
The Flangeolet is used for a 90° branch connection from a main pipe. On the run pipe side , the flangeolet is designed like a weldolet, it will welded with the run pipe as a branch of the pipe. On another side ,the flange-olet is a flange connection, this flange dimensions could be designed as per EN1092, ASME/ANSI B16.5 standard or other codes.
ASTM A182 F51 Flangeolet
ASTM A182 F51 Flangeolet, also known as a flanged branch outlet, is a forged outlet fitting designed to connect run pipes to branch pipes using a flange connection. Manufactured from Duplex Stainless Steel 2205 (UNS S31803/S32205), these fittings combine high strength and superior resistance to pitting, crevice corrosion, and stress corrosion cracking in chloride environments.
The Flangeolet (Flanged Olet) offers a safe and reliable alternative to welding directly onto the run pipe, making it a preferred choice in oil & gas, offshore, petrochemical, and marine piping systems.
ASTM A182 F51 Flangolet Standards & Grades
- Material Standard: ASTM A182 (Forged or Rolled Alloy & Stainless Steel Pipe Flanges, Forged Fittings, and Valves)
- Grade: F51 (Duplex 2205, UNS S31803/S32205)
- Other Duplex Grades Available: F53 (Super Duplex 2507), F55, F60, F61
- Dimensional Standards: ASME B16.5, B16.47, MSS-SP-44, API, DIN, EN
Size & Pressure Class
- Size Range: ½″ to 24″ (DN15–DN600)
- Pressure Rating: Class 150, 300, 600, 900, 1500, 2500
- Flange Facing: RF (Raised Face), RTJ (Ring Type Joint),
ASTM A182 F51 Chemical Compostion
| A182 | |||
| Identification Symbol | F51 | F60 | |
| UNS Number | S31803 | S32205 | |
| Chemical composition (%) | Carbon (C) | 0.030 max | 0.030 max |
| Manganese (Mn) | 2.00 max | 2.00 max | |
| Phosphorus (P) | 0.030 max | 0.030 max | |
| Sulfur (S) | 0.020 max | 0.020 max | |
| Silicon (Si) | 1.00 max | 1.00 max | |
| Nickel (Ni) | 4.5~6.5 | 4.5~6.5 | |
| Chromium (Cr) | 21.0~23.0 | 22.0~23.0 | |
| Molybdenum (Mo) | 2.5~3.5 | 3.0~3.5 | |
| Nitrogen (N) | 0.08~0.20 | 0.14~0.20 | |
| Tensile strength (MPa, min) | 620 | 655 | |
| Yield strength (MPa, min) | 450 | 450 | |
| Elongation (%, min) | 25 | 25 | |
| Reduction of area (%, min) | 45 | 45 | |
ASTM A182 F51 fangeolet Testing & Certification
- Mill Test Certificate (EN 10204 3.1 / 3.2)
- PMI (Positive Material Identification)
- Ultrasonic & Radiographic Testing
- NDT as per client requirements
We are a trusted manufacturer and exporter of ASTM A182 F51 Flangeolets (Duplex 2205 Flanged Branch Outlets), supplying to global projects in the oil & gas, petrochemical, and marine industries. With strict quality testing and compliance with ASME/ANSI standards, our Duplex Steel F51 Flangeolets ensure long-term reliability and corrosion resistance. Contact us today for datasheets, pricing, and custom sizes.
