SW Flange (Socket Weld Flange) contain a shoulder on the inside of the flange that acts as a guide to set the depth at which the pipe is welded to the flange. They are fabricated by inserting the pipe end into the flange until it bottoms out against the shoulder, and then retracting the pipe 1/8 in before welding it in place. This practice was originally employed to reduce cracking due to thermal stresses in stainless steel superheaters, but over the years has become standard practice for the installation of all socket weld flanges (SW Flange).

Socket Weld Flanges are available in pressure from 150# and up and pipe schedule 40 to schedule 160. Specifying the pipe schedule ensures that ID of the SW Flange matches the ID of pipe for smooth fluid flow.

Jinan Aowei offers Socket Weld Pipe Flange in A105N, A105, ST37.2, C22.8, P245GH, ST37.2 High Yield & Carbon steel.

Email summer@jnaowei.com for all your flange buying needs.

The Picture below gives an overview of socket weld flange VS Lap Joint Flange & Slip On Flange