Bulletin 114
Guidelines for Identification of Ammonia Refrigeration Piping and System Components (Date: 2014) This bulletin provides a comprehensive ammonia labeling scheme for companies in need of an identification system that “covers it all.” It offers recommendations on label sizes, colors, installation locations and label material requirements. Includes non-mandatory pipe color scheme as well as updates to pipe marking. Last updated in 1991.
News Story on Suggested Color Guideline