Shrikant Steel Centre is a premier Long Weld Neck Flanges Supplier in Dubai. We deliver precision-engineered, high-performance long weld neck (LWN) flanges designed with an extended straight neck that acts as a self-reinforcing nozzle neck. Tailored for high-pressure vessels, heavy-duty industrial boilers, and critical oil refinery equipment, our long weld neck flanges serve top-tier public and private sector projects across petroleum, gas, chemical processing, and power generation industries.
As a leading Long Weld Neck Flanges Supplier in Dubai, Shrikant Steel Centre stocks and supplies a comprehensive range of long weld neck flanges. Our components undergo strict quality checks, including Positive Material Identification (PMI), 100% radiography, hydrostatic testing, and ultrasonic inspection to guarantee zero leakage and extreme structural integrity under thermal and mechanical fatigue.
Our approved inventory includes Stainless Steel Long Weld Neck Flanges, Carbon Steel Long Weld Neck Flanges, and Duplex Steel Long Weld Neck Flanges available in various pressure ratings, schedules, and material grades.
| Product Name | Long Weld Neck Flanges |
|---|---|
| Available Types | Stainless Steel, Carbon Steel, Duplex Steel, Super Duplex, and Alloy Steel Long Weld Neck Flanges |
| Applicable Standards | ASME / ANSI B16.5, ASME B16.47 Series A & B, EN 1092-1, DIN, BS 4504, MSS-SP-44 |
| Pressure Rating | Class 150 LBS, 300 LBS, 400 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS / PN6 to PN400 |
| Nominal Size Range | 1/2" NB to 24" NB (15 NB to 600 NB) |
| Neck Length / Barrel Length | Standard lengths (9", 12", 18") or custom fabricated per drawing |
| Flange Facing Types | Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ) |
| Certification & Inspection | EN 10204 3.1 MTC, PMI Inspection Certificate, NACE MR0175 / ISO 15156 |
| Long Weld Neck Flanges Material Grades | |
| Stainless Steel | ASTM A182 F304, F304L, F316, F316L, F310S, F317L, F321, F347 |
| Carbon Steel | ASTM A105, ASTM A350 LF2 (Low Temperature Carbon Steel), ASTM A694 F42, F52, F60, F65 |
| Alloy Steel | ASTM A182 F1, F5, F9, F11, F12, F22, F91 |
| Duplex / Super Duplex | ASTM A182 F51 / UNS S31803, F53 / UNS S32750, F55 / UNS S32760 |
| Nickel Alloys | Inconel 600/625, Monel 400, Hastelloy C276, Alloy 20 |
Strict chemical composition monitoring is essential to ensure quality and compliance. The precise balance of elements guarantees required mechanical strength, oxidation stability, and resistance against pitting and stress corrosion cracking in aggressive operating environments.
| Long Weld Neck Flanges Chemical Composition (%) | ||||||||
|---|---|---|---|---|---|---|---|---|
| Grade | C | Mn | P | S | Si | Cr | Ni | Mo |
| ASTM A105 | 0.35 max | 0.60-1.05 | 0.035 max | 0.040 max | 0.10-0.35 | 0.30 max | 0.40 max | 0.12 max |
| F304 | 0.08 max | 2.00 max | 0.045 max | 0.030 max | 1.00 max | 18.00-20.00 | 8.00-11.00 | - |
| F304L | 0.030 max | 2.00 max | 0.045 max | 0.030 max | 1.00 max | 18.00-20.00 | 8.00-13.00 | - |
| F316 | 0.08 max | 2.00 max | 0.045 max | 0.030 max | 1.00 max | 16.00-18.00 | 10.00-14.00 | 2.00-3.00 |
| F316L | 0.030 max | 2.00 max | 0.045 max | 0.030 max | 1.00 max | 16.00-18.00 | 10.00-15.00 | 2.00-3.00 |
Every long weld neck flange undergoes rigorous destructive and non-destructive testing to verify structural mechanical performance. The table below highlights minimum standard mechanical requirements across key forging grades:
| Long Weld Neck Flanges Mechanical Properties | |||||
|---|---|---|---|---|---|
| Grade | UNS / Spec | Tensile Strength (MPa), min | Yield Strength (MPa), min | Elongation (%), min | Hardness (HB), max |
| ASTM A105 | K03504 | 485 | 250 | 22 | 187 HB max |
| A350 LF2 | K11572 | 485 - 655 | 250 | 22 | 197 HB max |
| F304 | S30400 | 515 | 205 | 30 | 187 HB max |
| F316 | S31600 | 515 | 205 | 30 | 187 HB max |
| F51 (Duplex) | S31803 | 620 | 450 | 25 | 290 HB max |
Long weld neck flanges follow dimensional tolerances governed by ASME B16.5 and ASME B16.47 specifications. The table below presents standard reference dimensions for Class 150 Raised Face (RF) flanges:
| ASME B16.5 Class 150 Long Weld Neck Flange Dimensions | |||||
|---|---|---|---|---|---|
| NPS | DN | Flange Outside Diameter (mm) | Flange Thickness (mm) | Bolt Circle Diameter (mm) | Number of Bolts |
| 1/2" | 15 | 88.9 | 11.2 | 60.3 | 4 |
| 3/4" | 20 | 98.6 | 12.7 | 69.8 | 4 |
| 1" | 25 | 108.0 | 14.2 | 79.4 | 4 |
| 1 1/2" | 40 | 127.0 | 17.5 | 98.4 | 4 |
| 2" | 50 | 152.4 | 19.0 | 120.6 | 4 |
| 3" | 80 | 190.5 | 23.9 | 152.4 | 4 |
| 4" | 100 | 228.6 | 23.9 | 190.5 | 8 |
| 6" | 150 | 279.4 | 25.4 | 241.3 | 8 |
| 8" | 200 | 342.9 | 28.4 | 298.4 | 8 |
| 10" | 250 | 406.4 | 30.2 | 361.9 | 12 |
Leading Long Weld Neck Flanges Supplier in Dubai, supplying certified piping solutions worldwide.
Shrikant Steel Centre supplies long weld neck flanges across all major industrial belts and project sites in Dubai with complete documentation and fast logistics management.
| City We Supply | |||||
|---|---|---|---|---|---|
| Bengaluru | Mumbai | Chennai | Hyderabad | Kolkata | Pune |
| New Delhi | Ahmedabad | Jaipur | Surat | Salem | Gandhinagar |
| Bhiwandi | Tiruppur | Sivakasi | Jamnagar | Thiruvananthapuram | Rajahmundry |
| Bhubaneswar | Vijaywada | Firozabad | Pithampur | Rajkot | Bharuch |
| Panna | Raipur | Cochin | Ludhiana | Panipat | Durgapur |
| Peenya | Hosdurg | Channapatna | Kharagpur | Nashik | Bareilly |
We export certified long weld neck flanges globally to clients in the Middle East, Europe, Asia, and North America. Contact our sales team to discuss project-specific requirements and export logistics.
| Countries We Supply | ||||
|---|---|---|---|---|
| Saudi Arabia | Oman | Kuwait | Netherlands | Iran |
| Bahrain | Qatar | UAE | Africa | China |
| Nigeria | Mexico | Canada | Venezuela | United Kingdom |
| United States | South Africa | Malaysia | Bangladesh | Turkey |
| Singapore | Sri Lanka | Australia | Brazil | Germany |
| France | Italy | South Korea | Poland | Belgium |
