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.
Socket welded flanges are adaptable, can withstand most fluids, and are efficient in getting the job done.The recess of the inner diameter also allows for a good fit of the pipe which enables a smooth fluid of liquid.
Socket weld flanges are not only easy to use, but they are also versatile, durable, and withstand highly corrosive fluids.Overall, they are found to have quite a long service life.