Long Weld Neck Flange
Key Features
- Extended hub for reinforcement
- Ideal for high-pressure & temperature
- Smooth flow with reduced turbulence
- Description
- Technical Specification
- Materials & Grades
- Dimension
Long Weld Neck Flanges are specially designed flanges featuring an extended tapered hub that provides additional reinforcement and improved stress distribution. These flanges are commonly used in high-pressure, high-temperature, and critical applications such as pressure vessels, column heads, and specialized piping systems.
SAKSHI FORGE manufactures premium quality Long Weld Neck Flanges using advanced forging techniques and high-grade stainless steel materials. The long neck of the flange helps in transferring stress from the flange to the pipe, thereby reducing stress concentration and increasing the overall strength of the piping system.
These flanges are bored to match the inside diameter of the pipe, ensuring smooth and uninterrupted flow of fluids. The extended hub design minimizes turbulence and erosion, making them suitable for applications involving high velocity fluids and extreme operating conditions.
Long Weld Neck Flanges are widely used in industries such as oil & gas, petrochemical, refineries, power plants, and offshore installations. They are particularly suitable for pressure vessels and equipment requiring nozzle connections.
All Long Weld Neck Flanges supplied by SAKSHI FORGE are manufactured in accordance with international standards and undergo strict quality inspection to ensure durability, reliability, and long service life.
Type | Long Weld Neck Flange |
Standards | ASME B16.5, ASME B16.47, MSS SP44 |
Size | ½” NB to 48” NB |
Pressure Ratings | Class 150 to 2500 |
Face Type | RF, FF, RTJ |
Manufacturing | Forged |
Surface Treatment | Anti-rust Oil, Pickling, Passivation |
Tolerances | As per ASME standards |
Stainless Steel
ASTM A182 F304, F304L, F316, F316L, F321, F347, F904L
Duplex Steel
UNS S31803, S32205
Super Duplex Steel
UNS S32750, S32760
Nickel Alloys
Inconel 600, 625, Monel 400, Hastelloy C276
Size (NB) | OD (mm) | Bolt Circle (mm) | No. of Holes | Hub Length (mm) | Thickness (mm) |
1” | 108 | 79.4 | 4 | 120 | 14.3 |
2” | 152 | 120.7 | 4 | 150 | 17.5 |
4” | 229 | 190.5 | 8 | 200 | 23.9 |
6” | 279 | 241.3 | 8 | 250 | 25.4 |
8” | 343 | 298.5 | 8 | 300 | 28.6 |
10” | 406 | 362 | 12 | 350 | 30.2 |
(Custom hub length and dimensions available on request)