The American National Standards Institute (ANSI) Standard A13.1-2007 Scheme for Identification of Piping Systems recommends a universal approach to pipe and valve identification. Seton makes it easy to understand how and why you should label your pipes. One specific recommendation in this standard focuses on what size marker you should use.
The standard makes recommendations as to the size of letter height and length of color field for all pipe markers, based on the pipe diameter. These recommendations are shown in the chart below. Seton markers, when used properly with arrows, meet or exceed the standard recommendation.

