Precision-Engineered Weld Neck Flanges for High-Pressure Applications
Vardhman Steel Overseas offers a premium range of Weld Neck Flanges (WN Flanges), designed for critical piping systems where high pressure, extreme temperatures, and vibration resistance are key requirements. These flanges feature a long tapered hub and are butt-welded to the pipe, ensuring a smooth transition and reducing stress concentration at the base of the flange.
Our Weld Neck Flanges are ideal for high-load applications in industries such as Oil & Gas, Petrochemical Refineries, Power Generation, Offshore Platforms, Shipbuilding, Pharmaceuticals, and Water Treatment Plants. They are particularly recommended for systems where repeated bending, high-pressure fluctuations, or extreme thermal cycling is expected.
Our Weld Neck Flanges are manufactured in accordance with standards like ASME B16.5, ASME B16.47 (Series A/B), EN 1092-1, ANSI, DIN, and BS. Available in pressure ratings from Class 150 to 2500 and sizes ranging from ½” NB to 48” NB, they are supplied in Raised Face (RF), Flat Face (FF), and Ring Type Joint (RTJ) facing options.
Every Weld Neck Flange undergoes stringent quality checks for dimensional accuracy, pressure resistance, and mechanical strength. We offer full traceability with mill test certificates and third-party inspection from agencies like TUV, DNV, BV, and Lloyds, ensuring global compliance and reliability.
Choose Vardhman Steel Overseas for Weld Neck Flanges that deliver secure weldability, stress reduction, and optimal performance in the most demanding industrial environments.
Available Materials & Grades
We offer a wide range of high-quality materials and grades to meet diverse industrial requirements and standards.
| Material Type | Common Grades |
|---|---|
| Stainless Steel | 304, 304L, 316, 316L, 310S, 321, 347, 904L |
| Carbon Steel | A105, A106, A234 WPB, A350 LF2, A516 Gr.70 |
| Alloy Steel | A182 F1, F5, F9, F11, F22, F91 |
| Duplex Steel | UNS S31803, UNS S32205 |
| Super Duplex Steel | UNS S32750, UNS S32760 |
| Inconel | 600, 601, 625, 718 |
| Incoloy | 800, 800H, 800HT, 825 |
| Monel | 400, K500 |
| Hastelloy | C22, C276, B2 |
| Titanium | Grade 2, Grade 5 (Ti-6Al-4V) |
| Nickel Alloy | Nickel 200, Nickel 201 |
| Copper Alloys | Copper, Brass, Bronze, Cupro Nickel 90/10 & 70/30 |
Weld Neck Flange – Technical Specifications
Explore the dimensional and performance specifications of our high-quality Weld Neck Flanges manufactured by Vardhman Steel Overseas.
| Specification Parameter | Details |
|---|---|
| Product Name | Weld Neck Flange (WNRF) |
| Size Range | ½” NB to 48” NB |
| Pressure Ratings | Class 150, 300, 600, 900, 1500, 2500 |
| Facing Types | Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF) |
| End Connection | Butt-Weld |
| Manufacturing Method | Forged / Machined |
| Applicable Standards | ASME B16.5, ASME B16.47 Series A & B, MSS-SP-44, EN 1092-1, DIN, BS |
| Testing & Certification | Hydro Testing, PMI, UT, RT, MTC as per EN 10204 3.1 / 3.2, Third-Party Inspection (TPI) |
Features & Benefits
Weld Neck Flanges from Vardhman Steel Overseas are engineered for durability, high-pressure performance, and precision fit in critical industrial piping systems. Discover the advantages that make our flanges a preferred choice globally.
- High Pressure Capability – Ideal for severe service conditions, capable of withstanding high pressure and temperature fluctuations.
- Leak-Proof Connection – Long tapered hub ensures smooth transition and reduces stress concentration at the weld area.
- Enhanced Structural Integrity – Provides excellent support to pipe sections during bending and mechanical loading.
- Precision Machining – Manufactured with tight dimensional tolerances for accurate bolt alignment and face mating.
- Reinforced Butt-Weld Design – Offers superior strength and load-handling compared to slip-on or threaded types.
- Available in Multiple Face Types – Raised Face (RF), Ring Type Joint (RTJ), and Flat Face (FF) options for system compatibility.
- Wide Range of Pressure Classes – Supplied from Class 150 to Class 2500 to suit diverse pressure ratings.
- Superior Corrosion Resistance – Offered in corrosion-resistant materials for aggressive environments.
- Conforms to International Standards – Designed as per ASME B16.5, ASME B16.47, DIN, EN 1092-1, and other global norms.
- Ideal for High-Integrity Applications – Widely used in critical systems in oil & gas, refineries, power plants, and petrochemical units.