ASTM A182 F53 Flanges
ASTM A182 F53 UNS S32750 material has high strength and excellent corrosion resistance. For 48-inch WNRF flanges, its size is larger to meet the needs of high-pressure and large-flow pipeline systems. ASTM A182 F53 WNRF Flange is widely used in marine engineering, chemical equipment and oil and gas industries.
About Super Duplex F53 S32750 2507 Material
PRE value (pitting resistance equivalent) is greater than 42.
Yield strength and tensile strength far exceed austenitic stainless steel.
Performs particularly well in chloride-containing environments.
Suitable for environments with temperatures not exceeding 250°C.
Technical Specifications Overview
| Feature | Specification Details |
| Material Grade | ASTM A182 Grade F53 / UNS S32750 / EN 1.4410 / Super Duplex 2507 |
| Flange Standard | ASME B16.47 (Large Diameter Steel Flanges) |
| Series / Design | Series A (MSS SP-44) & Series B (API 605) |
| Flange Type | Weld Neck Raised Face (WNRF) |
| Nominal Pipe Size (NPS) | 48 Inch (DN 1200) |
| Pressure Class Ratings | Class 150, Class 300, Class 600, Class 900 |
| Facing Options | Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF) |
| Testing & Certs | PMI Test, UT Test, Hydrostatic Test, EN 10204 3.1 MTR |
48" WNRF Flange
WNRF (Weld Neck Raised Face) flange is a type of flange with a welded neck as the main structure, suitable for high pressure and high temperature conditions.
ASME B16.47 Standard
ASME B16.47 is the design and manufacturing standard for large diameter flanges, applicable to flanges ranging from 26 inches to 60 inches.
- Series A: used in industrial applications with higher pressure and strength requirements.
- Series B: slightly smaller in size, suitable for applications that focus more on economy.
Key Features of the WNRF Design
Tapered Hub: Gradually transfers stress from the flange ring to the attached pipe wall, reducing stress concentration at the weld joint.
Smooth Flow Bore: Machined to match the schedule (thickness) of the mating pipe to minimize turbulence and erosion inside large 48" lines.
Concentric Serrated Face: Raised face (RF) features a smooth or serrated finish to ensure a secure gasket seal under thermal cycling.
ASTM A182 F53 Weld Neck Flanges Application Areas
- Seawater desalination equipment
- Offshore platform piping system
- Chemical industry
- Oil and gas
- Nuclear power plant cooling system piping
- High-pressure steam piping system
Why Source Large-Diameter F53 Flanges from HT Pipe?
Forging & Machining Capabilities: Heavy forging presses capable of handling large-diameter blanks up to 60 inches.
Full Quality Assurance: Positive Material Identification (100% PMI), Ultrasonic Testing (UT), Liquid Penetrant Testing (PT), and Charpy Impact Testing at sub-zero temperatures.
One-Stop Piping Packages: We supply matching ASTM A790 UNS S32750 seamless/welded 48" pipes, ASTM A815 WPS32750 fittings, and custom pipe spools.
