What is Socket Weld Pipe Fittings A socket weld fittings is a pipe attachment detail. In this case, the pipe will be inserted in to a recessed area of a pipe, fitting, valve, or flange. In order to join the pipes or valves to the other sections of the pipe, seal welds of fillet type will be applied. So in some cases socket weld fittings is a good choice. This is because the benefits...