Weld Neck Flanges
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Weld Neck Flanges
A Weld Neck Flange (WN Flange) is a heavy-duty, high-integrity flange with a long tapered hub that is welded to the pipe. It’s ideal for applications with high pressure, temperature, or stress, such as in oilfield pipelines, marine processing plants, and civil infrastructure pipelines.
š© Types of Weld Neck Flanges
| Flange Type | Description | Use Case |
| Standard Weld Neck | Common type with tapered neck. Butt-welds to pipe. | Oilfield pipelines, refineries |
| Long Weld Neck (LWN) | Extended neck. Used for vessel nozzles, pipeline risers. | Marine risers, tank connections |
| Reducing Weld Neck | Connects larger flanged pipe to smaller diameter pipe. | Flow control in civil pipelines |
| Raised Face (RF) | Raised sealing surfaceāused with flat gaskets. | General oil & gas services |
| Ring Type Joint (RTJ) | Metal-to-metal seal using RTJ gasketsāfor very high pressure. | Offshore oil rigs, subsea systems |
| Flat Face (FF) | Full-face contact, lower pressure rating. | Water treatment plants, civil use |
š Flange Standards: JIS, DIN, ANSI/ASME
| Standard | Region | Common Pressure Classes | Used In |
| ANSI/ASME | USA | Class 150, 300, 600, 900, 1500, 2500 | Oilfield, marine, petrochemical |
| DIN | Germany/EU | PN 6, PN 10, PN 16, PN 25, PN 40 | Civil pipelines, water distribution |
| JIS | Japan/Asia | 5K, 10K, 16K, 20K, 30K | Marine piping, shipbuilding, oil & gas |
š Materials & Grades
| Material | Grade | Suitability | Industries |
| Carbon Steel | ASTM A105 / A350 LF2 | Economical, general use | Civil, oilfield pipelines |
| Stainless Steel | A182 F304 / F316 | Corrosion resistance | Marine, offshore |
| Duplex Stainless Steel | UNS S31803 / S32750 | Excellent pitting and stress resistance | Marine, offshore platforms |
| Nickel Alloys | Inconel 625, Monel | High temp and seawater resistance | Deep-sea & subsea equipment |
| Low-Temperature Steel | ASTM A350 LF2 | Cryogenic and cold climate pipelines | Arctic oilfields, LNG plants |
š Application-Specific Benefits
Oilfield
- High-pressure sealing
- Resistant to sour service (H2S)
- Available in API-compatible specs
Marine
- Seawater corrosion-resistant materials like Monel, Duplex
- Perfect for shipbuilding, offshore risers, subsea connectors
Civil Works
- Low-cost carbon steel flanges for water transport
- Durability for buried pipelines and hydro testing systems
Your trusted Weld Neck Flange suppliers in Dubai, Burj Al Noor Trading L.L.C delivers a wide-ranging selection of high-quality flange fittings tailored for industrial, marine, offshore, and civil engineering sectors across the UAE and beyond. We stock and supply various types of weld neck flanges, including standard weld neck, reducing weld neck flanges, and long weld neck flanges for marine applications, all engineered to ensure high integrity, accurate alignment, and excellent performance under extreme temperature and pressure conditions. Our products meet stringent global specifications such as ASME B16.5 weld neck flange standards, offering consistent, leak-proof connections across a wide array of pipeline systems.
As a leading supplier in the GCC, we specialize in weld neck flanges for the oil and gas industry, designed to handle high-pressure flow systems in upstream, midstream, and downstream operations. For marine and offshore applications, we provide marine-grade weld neck flanges built from corrosion-resistant materials suitable for long-term exposure to seawater, ensuring durability and safety in the harshest environments. Our range also includes high-pressure flanges for offshore rigs, as well as civil engineering flange fittings used in infrastructure, construction, and water treatment pipelines.
In addition to our extensive flange inventory, Burj Al Noor Trading L.L.C supports both standard and custom project requirements, with a wide selection of sizes and materials including stainless steel, carbon steel, duplex, and super duplex alloys. With fast delivery options and reliable technical support, we serve clients across Dubai, Abu Dhabi, Sharjah, the Northern Emirates, Oman, Saudi Arabia, the wider GCC, and Africa.
For durable, certified, and competitively priced flange solutions from experienced Weld Neck Flange suppliers in Dubai, trust Burj Al Noor Trading L.L.Cāwhere precision meets performance.
We deal in all kinds of flanges, including: Weld Neck Flange, Slip-On Flange, Blind Flange, Threaded Flange, Socket Weld Flange, Lap Joint Flange, Long Weld Neck Flange, Orifice Flange, Spectacle Blind Flange, Ring Type Joint (RTJ) Flange, Forged Flange, Plate Flange, Reducing Flange, and Custom Flanges.
