What Is a Reducing Flange?

What Is a Reducing Flange?

A reducing flange is designed to connect equipment or piping components with different nominal diameters.

Unlike a standard flange with a bore matching the connected pipe, a reducing flange has a smaller bore while maintaining the outside dimensions required for its flange connection.

Why Use a Reducing Flange?

Reducing flanges can provide a compact solution when a change in pipe diameter is required near a flanged connection.

They may be considered for:

• Equipment connections
• Pump systems
• Valve connections
• Process piping
• Utility systems

However, engineers should carefully evaluate flow conditions and pressure requirements before selecting a reducing flange.

Reducing Flange vs Reducer

A reducing flange combines the flange connection and diameter reduction into one component.

A conventional reducer is a separate butt weld fitting installed between pipes.

The best option depends on the piping design and project specifications.

Material Selection

Reducing flanges can be manufactured from carbon steel, stainless steel, alloy steel, and duplex stainless steel.

Material selection should consider pressure, temperature, corrosion, and the operating medium.

Accurate bore dimensions are especially important because they directly affect the connected pipe.

As a professional China steel flange manufacturer, we provide reducing flanges with customized bore sizes and different international standards to meet specific customer requirements.