Flange, Welding Neck : A flange with a neck on the side opposite the sealing face prepared with a bevel to weld to corresponding pipe or transition pieces. (Spec 6A)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}