Stub ends are utilized with lap joint flange. In this sort of flange, the stub is butt welded towards the pipe, Whilst flange is freely moved more than the stub conclusion. It is basically flange component but covered less than ASME B16.nine that is why it is actually regarded as http://valves-and-fittings41516.blogoscience.com/23245/little-known-facts-about-valves-and-fittings