Long Weld Neck Flange Manufacturer
Even Stress Distribution
Suitable for High-Pressure and High-Temperature Environments
Ease of Inspection and Maintenance
High Quality Long Weld Neck Flange
SSM’s Long Weld Neck Flanges are designed to distribute stress evenly within the piping system, reducing stress concentration. The welded connection ensures strength and integrity, making them ideal for high-pressure and high-temperature applications. With SSM, you can trust that our Long Weld Neck Flanges provide high-quality, reliable connections for a variety of industrial needs.
- Size: 1/2″ to 48″
- Pressure Rating: Class 150, 300, 600, 900, 1500, 2500
- Joint Type: Flat Face (FF), Raised Face (RF), Ring Type Joint (RTJ)
- Material: Carbon steel, stainless steel, nickel alloy, duplex stainless steel, aluminum, copper-nickel alloy
What is a Long Weld Neck Flange
A Long Weld Neck Flange (LWN flange) is a type of weld neck flange with an extended neck. The neck of this flange is longer than that of a standard weld neck flange, and it is used in specific applications to provide greater support and better stress distribution. Standard barrel lengths are 9″, 12″, and 16″, but they can be manufactured according to customer requirements.
long weld neck flange cross section
Advantages of Long Weld Neck Flanges
Even Stress Distribution
The Weld Neck flange is designed with a long neck that is connected to the pipe by butt welding. This design provides exceptional strength and durability, making it suitable for high-pressure and high-temperature environments.
Suitable for High-Pressure and High-Temperature Environments
The long neck of the flange matches the outer diameter of the pipe, which helps to reduce stress concentration and allows for more even distribution of pressure and temperature changes. This reduces the risk of system failure.
Reduced Turbulence and Erosion
With butt welding connections, the flange provides good sealing, making it ideal for applications that require leakage prevention, such as chemical, oil, and gas pipeline systems.
Ease of Inspection and Maintenance
Additionally, this flange is suitable for extreme temperature environments and can withstand stress under high or low-temperature conditions without losing its strength and integrity.
Long Weld Neck Flange Application
Long neck weld flanges are widely utilized across various industries due to their sturdy design and versatility. They serve critical applications such as:
1. High-pressure systems: Long neck weld flanges are employed in high-pressure environments, including oil and gas pipelines, refineries, and chemical plants.
2. High-temperature environments: They are designed to maintain flange integrity in extreme temperatures and are commonly used in power plants, boilers, and other high-temperature settings.
3. Critical processes: These flanges are used in processes where reliability is crucial, such as chemical processing, petrochemical industries, and hazardous materials applications.
4. Pipeline systems: Within piping systems, long neck weld flanges provide a robust connection point that helps reduce stress on the pipe. Their extended neck design aids in the even distribution of stress.
5. Structural applications: They are utilized in structural applications that require a strong and secure connection, for example, in supports, hangers, and other structural elements within industrial environments.
6. Cryogenic applications: Long neck weld flanges find use in cryogenic applications, such as the storage and transportation of liquefied gases, owing to their ability to withstand extreme conditions.
These flanges feature an extended neck that provides enhanced alignment and strength, making them well-suited for demanding applications.
One-Stop Flange Provider for All Your Needs
SSM has significant product advantages in manufacturing Long Weld Neck Flanges. Whether it’s quality or price, we will meet your needs.
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Additional information on Long Weld Neck Flange
Long Weld neck flange is one of the most commonly used flanges. Please continue reading for information on flange size, installation, and more.
Variations of Long Neck Weld Flanges
There are different variants of Long Neck Weld Flanges (LWN Flanges), such as Heavy Barrel LWN and Equal Barrel LWN, which mainly differ in neck design and wall thickness. Here is a comparison of them:
1. Heavy Barrel LWN:
– Neck Design: The Heavy Barrel design means that the wall thickness of the neck portion is thicker than that of standard or equal-diameter long neck flanges.
– Wall Thickness: The thicker neck provides additional strength and support, making heavy-wall flanges suitable for extremely high-pressure applications that require extra durability.
– Application: Commonly used in industries that must withstand extremely high mechanical stress and pressure, such as critical piping systems, pressure vessels, and high-temperature environments.
2. Equal Barrel LWN:
– Neck Design: The Equal Barrel design means that the flange’s neck diameter and wall thickness are consistent with the connected pipe.
– Wall Thickness: The neck’s wall thickness is the same as that of the connected pipe, ensuring a smooth transition in the piping system.
– Application: Suitable for standard applications with relatively uniform stresses, with high demands on docking and smooth flow.
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FAQ
Compared to a standard Weld Neck Flange, a Long Weld Neck Flange has a longer neck. The extended neck design provides better stress distribution and greater support, making it suitable for higher pressure and temperature conditions.
Standard neck lengths for Long Weld Neck Flanges are typically 9 inches, 12 inches, or 16 inches, but they can be customized based on customer requirements.
The dimensions of Long Weld Neck Flanges are usually determined according to standards such as ASME B16.5 or ASME B16.47. These standards provide detailed specifications for various sizes, pressure ratings, and design requirements.
Long Weld Neck Flanges are typically welded to the pipe. During installation, ensure proper alignment of the flange and pipe, and follow standard welding procedures to ensure the strength and sealing of the connection.