SS Weld Neck Flanges (WNRF)
Raj Metals specializes in the supply of high-strength Stainless Steel Weld Neck Flanges (WNRF), the industry-leading solution for high-pressure and critical-service piping environments. Distinguished by their long, tapered hub that facilitates a smooth transition via butt-weld to the pipe, these flanges provide exceptional reinforcement and minimize turbulence in high-flow systems. Built to withstand extreme temperature fluctuations and intense mechanical stress, our SS WNRF flanges are the preferred choice for demanding sectors including oil & gas, chemical processing, steam systems, and offshore infrastructure. Each flange is precision-forged from stainless steel—such as 304L and 316L—to ensure maximum durability, superior corrosion resistance, and total safety under the most rigorous industrial conditions.
Key Features of Our SS Weld Neck Flanges
✓ Superior High-Pressure Integrity for Critical Piping Systems
✓ Uniform Stress Distribution via Precision-Engineered Tapered Hub
✓ Minimized Flow Turbulence & Erosion at Weld Joints
✓ Reliable Performance Under Extreme Temperature & Pressure Fluctuations
Product Specifications
| Parameter |
Details |
| Product Form |
SS Weld Neck Raised Face (WNRF) / RTJ |
| Size Range |
1/2" NB to 60" NB |
| Pressure Rating |
Class 150# to 2500# | PN10 to PN160 |
| Face Type |
Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF) |
| Thickness / Schedule |
SCH 10S to SCH XXS (Matches pipe schedule) |
| Manufacturing Process |
Precision Hot Forged & CNC Machined |
| Standard Compliance |
ANSI/ASME B16.5, B16.47, DIN, EN 1092-1 |
| Condition |
Solution Annealed, Quenched & Tempered |
| Quality Checks |
PMI, Ultrasonic (UT), Radiography (RT), Hydrostatic, Charpy V-Notch |
SS Weld Neck Flanges Size Chart
| Nominal Size |
Pressure Class |
Facing |
Recommended Use |
| 1/2" - 2" |
150# - 600# |
RF / FF / RTJ |
High-pressure instrumentation, small-bore piping |
| 2-1/2" - 8" |
150# - 900# |
RF / RTJ |
Process piping, chemical lines |
| 10" - 24" |
150# - 600# |
RF / RTJ |
Main plant piping, refinery flow lines |
| Above 24" |
Class 150# / 300# |
Custom |
Large-scale infrastructure and oil & gas |
| Custom Requirement |
Custom sizes, special SS grades (304L, 316L, etc.), and drawings are available on request. |
Industry Applications
Thermal & Nuclear Power Plants
Offshore Oil Rigs & Marine
