Girth Seam : A circumferential butt-welded seam lying in a plane normal to the longitudinal axis of the pipe, used to join sections into lengths of straight pipe. (Spec 2B)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}