Socket Weld Flanges

Socket weld flanges are used where the pipe is set into a recessed socket before welding. That design is typically specified on smaller-diameter piping where the connection style is already defined and the flange needs to match the system cleanly. In stainless service, they are commonly used where class, size, and material all need to stay consistent with the rest of the line.

PipingNow offers socket weld flanges in 150#, 300#, and 600# classes in 304L and 316L stainless steel.

Where Socket Weld Flanges Are Commonly Used

This style is often selected for stainless process piping, plant utility lines, and other installations where a socketed welded connection is called for. It is especially common on smaller sizes where the project specification already defines the connection method and the goal is to match it correctly.

stainless process piping
plant and utility systems
smaller-diameter piping runs
fabricated assemblies
applications requiring a socketed welded connection

Materials, Classes, and Size Range

This collection includes 150#, 300#, and 600# options in 304L and 316L stainless steel. 304L is commonly used for general stainless applications, while 316L is often selected where additional corrosion resistance is needed. Available sizes run from 1/2 in through 10 in.

150#, 300#, and 600# pressure classes
304L stainless steel
316L stainless steel
sizes 1/2 in through 10 in

What to Check Before Ordering

The main thing is to confirm that the flange matches the piping system it is being installed on. Pressure class, nominal size, material grade, and the required connection style all need to line up. If one of those details is off, the part may look close but still be wrong for the job.