Eccentricity 2 : A condition of pipe in which the OD and ID axes are not coincident, resulting in wall thickness variation around the circumference at a given section plane. (Bul 5T1)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}