The term "marking" is used to refer to the assorted marks on tubular products, and includes inspection markings made with paint sticks and stencils, and ball-point paint tubes. (RP 5A5)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}