Socket weld flanges are a type of pipe flange designed for small-diameter, high-pressure piping systems. They feature a socket-like bore where the pipe is inserted before being fillet welded around the top. This design provides a strong, leak-proof connection, making socket weld flanges ideal for applications requiring high structural integrity. Unlike slip-on flanges, socket weld flanges provide better fatigue resistance, making them suitable for industries such as oil and gas, chemical processing, and power plants.

One of the key advantages of socket weld flanges is their ability to provide a smooth bore, reducing turbulence and pressure drops in the piping system. This makes them particularly useful in systems where maintaining consistent flow efficiency is crucial. Additionally, their compact design allows them to be used in tight spaces where larger flanges may not be suitable. They are commonly used in applications where welding neck flanges would be too large or costly, while still offering similar strength and reliability.