ASTM A105/ASME SA105 Carbon Steel Long Weld Neck Flange, B16.5 LWNRF Flange

ANSI B16.5 Forged Carbon Steel Long Weld Neck Flange for Pipe Connection

ASTM A105/ ASME SA105 is standard for carbon steel fordgings, which commonly used in high-pressure and high-temperature applications. LWN flanges are typically welded to the pipe, providing a strong, permanent connection, creating a smooth transition and reducing turbulence, which is especially beneficial in high-velocity systems. YUHONG can provide can supply flanges with various sizes, pressure ratings, and types (slip-on, weld neck, threaded, and blind flanges...), covering carbon steel, stainless steel, and other alloys, allowing for compatibility with different types of piping systems and environments.

ASME SA105 Carbon Steel Long Weld Neck Flange Specification

Weld Neck Flange (WNF)  V.S. Long Weld Neck Flange (LWN)

Advantages of ASME SA105 Carbon Steel Long Weld Neck Flange

1. Enhanced Strength and Stability: The long neck design provides robust support for the joint, making it suitable for high-pressure and high-temperature applications. This design helps reduce the risk of leaks and failures.

2. Improved Flow Characteristics: The tapered neck allows for a smoother flow of fluids, reducing turbulence and pressure drop within the system. This is especially important in systems that transport liquids or gases under high velocities.

3. Better Alignment: The longer neck assists in aligning the flange with the piping system, making installation easier and ensuring that the flange remains in the correct position during welding.

4. Versatility in Applications: LWN flanges are appropriate for a variety of industrial applications, including chemical processing, oil and gas industries, power plants, and more. They can handle a wide range of temperatures and pressures.

5. Corrosion Resistance: When made from corrosion-resistant materials (such as stainless steel), LWN flanges can withstand harsh environments, extending the life of the piping system.

6. Reduced Vibration Impact: The long neck can help absorb vibration, reducing the impact on the flange connection and improving the longevity of the joint.

How to Use ASME SA105 Carbon Steel Long Weld Neck Flange Flanges

1. Selection: Choose an LWN flange that matches the diameter and pressure rating required for your piping system. Ensure that the material is suitable for the fluid being transported and the environmental conditions.

2. Preparation: Before installation, clean the flange faces and the pipe ends to remove any dirt, rust, or contaminants that could affect the weld quality. Ensure that both surfaces are flat and free from any defects.

3. Alignment: Place the flange onto the pipe and ensure proper alignment. The long neck should fit snugly into the pipe. It’s important that the flange is centered and positioned correctly to avoid uneven stresses during welding.

4. Welding: Use appropriate welding techniques to attach the flange to the pipe. Typically, a full penetration weld is recommended for LWN flanges. Ensure that the welding procedure is compliant with industry standards and guidelines.

5. Inspection: After welding, inspect the joint for any defects, such as cracks or incomplete welds. Non-destructive testing methods may be employed to ensure the integrity of the weld.

6. Flange Connection: Connect the opposing flange using bolts, ensuring that they are tightened to the required torque specifications. Use a gasket suitable for the application to ensure a leak-free seal.

7. Testing: Once installed, conduct pressure testing to confirm that the connection is leak-proof and functioning as intended. This is crucial for safety and system reliability.

Application

• Pipelines

• Pressure Vessels

• Steam Systems

• Marine Applications

• Chemical Processing

• Power Generation

• Food and Beverage Industry