What Are Different Types of Flanges and Their Uses

Flanges are crucial components in piping systems. With the help of the flanges, pipes remain secure and have leak-proof connections between pipes and equipment. There are several types of flanges, and every one of them has a special application. They serve purposes including connecting valves, pipes, and other equipment, and they are widely applied in various industries because of their diverse sizes and shapes. So, here is a guide to the most popular types of flanges that are widely used for their top properties and performance. 

Types of Flanges

Lap Joint Flange (LJ)

They consist of two parts: one is the lap joint ring flange, and the other is the lap joint stub end. The stub end is applied to the pipe and welded, and the lap joint ring flange is positioned on the other end. It also has ease of setup and dismantling.

Applications:

• In cases where the system has to be disassembled and assembled frequently, the flexibility to do so is essential (for example, in maintenance), pharmaceutical industries, food industries, and beverage industries (especially those industries that have hygienic concerns).

Advantages:

• Accessible for periodic cleaning and maintenance with easy dismantling if necessary, it helps ensure that work can begin at any time.
• Appropriate for systems in which components are known to be accessed frequently for removal and replacement purposes.

Blind Flange (BL)

A blind flange is typically used with a pipeline or system where it is needed to seal the end off. Call blind flange manufacturersfor more information.

Applications:

• Closing off or partial closure of pipe ends during maintenance or system tests.

Advantages:

• Seals pipes effectively.
• Best for short-term or long-term closures.

Threaded Flange (TH)

A threaded flange has an internal thread to enable it to be screwed on an external thread of the pipe. This type of flange is mostly used when welding cannot be done in the flange.

Applications:

• Heating will include gas, water, steam, and other pipeline systems.
• Ideal for components for which welding is either not possible or not feasible owing to material type and field conditions.
• Low-pressure systems.

Advantages:

• A quick assembly with fewer complications that does not require welding.
• Ideal to use for systems with low to medium pressure and temperature.

Socket Weld Flange (SW)

In a socket weld flange, there is a socket into which the pipe/tube fits, and then it is welded. It is used for small piping, particularly for small bore piping, and it is common in systems that demand strength and the ability to resist leaks.

Applications:

• Small diameter piping (normally below 2 inches).
• It can be used in power plants and chemical industries.
• Applications with integration necessitate a single-plane surface.

Advantages:

• It offers a more rigid, less likely-to-leak connection than a threaded connection on pipes.
• Made for use in small-bore high-pressure systems.

Weld Neck Flange (WN)

A weld neck flange or high-hub flange is a circular fitting that is welded to the pipe. It delivers excellent strength and resistance to high pressure and temperature. Therefore, it is an ideal choice for applications where integrity is foremost. Contact weld neck flanges manufacturers for more details.

Applications:

• High-pressure systems
• Chemical plants
• Pharmaceutical and Food processing
• Pipelines for oil and gas transportation

Resistance to high-temperature and extreme environments

Advantages:

• Offers strong and leak-resistant seal
• Suitable for high-pressure and high-temperature environments
• Allows for precise alignment during installation

Slip-On Flange (SO)

The slip-on flange or hubbed flange has a flat face, and its design is made to slip over the end of a pipe. It is then welded both inside and outside. It is easier to install and less expensive than a weld neck flange.

Applications:

• Low-pressure systems and higher-temperature system
• Plumbing and water systems
• HVAC applications
• Pressure ratings from 150 lbs to 2500 lbs

Advantages:

• Easy to install
• Cost-effective solution to install.
• Performs great for low to moderate-pressure applications.
• Ideal for systems where welding access is limited.

Conclusion:

So, these are the types and uses of flanges that may help you choose a reliable flange for your project. For more details, you can contact ss slip on flange manufacturers or alloy steel flanges manufacturers and learn more about flanges.