What Is a Socket Weld Flange?

What Is a Socket Weld Flange?

A Socket Weld Flange, often called an SW flange, is designed for small-diameter piping systems. The pipe is inserted into a socket in the flange and connected by welding.

This design provides a strong connection while allowing relatively simple installation.

How Does It Work?

The pipe is inserted into the flange socket until it reaches the appropriate position. A fillet weld is then applied around the pipe and flange connection.

Socket weld flanges are commonly used for smaller pipe sizes where space and installation requirements are important.

Common Applications

They can be found in:

• Chemical piping
• Instrumentation systems
• Hydraulic pipelines
• Utility systems
• Industrial process piping

Advantages

Socket weld flanges provide:

• Compact design
• Good connection strength
• Easy positioning
• Suitable performance for many small-bore systems

The correct flange pressure rating and material should be selected according to operating conditions.

Common materials include ASTM A105 carbon steel, stainless steel, and alloy steel.

As an experienced China steel flange manufacturer, we supply socket weld flanges according to ASME B16.5 and other international standards, with factory-direct pricing and customized production available.