What is a socket weld elbow?
Socket welding (SW) is used for welding pipes and fittings including reducers, tees and elbows. Socket weld pipe fittings are used to permanently join pipes that are inserted into a recess in the fitting, flange or valve. Once correctly inserted, fillet type sealing welds are applied to join the pipe to the fitting.
Why do socket welders need a gap?
A gap between the two pipes in a socket weld means the difference between a good weld and a bad weld. Socket welding gap rings are used to eliminate cracked welds by providing a space for the pipe to expand into as it becomes warmer in temperature.