Structure and Design:

1. Socket Connection: Socket weld flanges have a recessed area (or socket) that allows the pipe to be inserted into the flange. This design helps ensure that the pipe is aligned properly during the welding process.

2. Welding: The pipe is first inserted into the socket and then welded around the perimeter. This process creates a strong, continuous weld that supports the connection. Typically, a fillet weld is used to complete the joint.

3. Flange Types: Socket weld flanges come in various types, such as slip-on, weld neck, blind, and threaded, each serving different purposes in a piping system.

Applications:

• High Pressure and Temperature: They are commonly used in systems that handle high pressures and temperatures due to their ability to maintain a strong seal under demanding conditions.

• Piping Systems: Ideal for small to medium-sized pipe diameters. They are often found in industries like oil and gas, chemical processing, and power generation.

Advantages:

• Strong and Reliable: The welding process creates a robust connection that minimizes the risk of leakage.

• Smooth Interior Surface: The internal surface of the pipe remains smooth, which helps reduce turbulence and pressure loss in the system.

• No Thread Wear: Unlike threaded flanges, socket weld flanges do not suffer from thread wear or damage.

Disadvantages:

• Cost: They can be more expensive due to the welding process and additional material.

• Installation Complexity: Proper alignment and welding skills are required, which can add complexity to installation.

Standards:

Socket weld flanges are manufactured according to various standards, such as ASTM, ANSI, and ASME. It’s essential to ensure that the flanges meet the appropriate standards for the specific application to guarantee safety and performance.