What Is a Threaded Flange and When Should It Be Used?

What Is a Threaded Flange and When Should It Be Used?

A threaded flange is a type of steel flange designed to connect to a pipe without welding. Instead, the flange contains an internal thread that matches the external thread of the pipe.

This makes threaded flanges different from weld neck, slip-on, and socket weld flanges.

How Does a Threaded Flange Work?

The pipe is machined with an external thread and screwed directly into the internal thread of the flange. Proper thread matching is important to ensure a secure connection.

Because welding is not required, threaded flanges can be useful in applications where welding is difficult or undesirable.

Common Applications

Threaded flanges are commonly used in:

• Low-pressure piping
• Water systems
• Utility pipelines
• Instrumentation systems
• Certain hazardous-area applications

However, the suitability of a threaded connection depends on pressure, temperature, pipe material, and project requirements.

Advantages

Threaded flanges offer several benefits:

• No welding required
• Easy installation
• Convenient maintenance
• Suitable for certain small-diameter applications

They are generally not the first choice for highly cyclic or severe service applications where welded connections may provide better performance.

As an experienced China steel flange manufacturer, we supply threaded flanges in carbon steel, stainless steel, and other materials according to international standards and customer specifications.