American Society of Mechanical Engineers, “Scheme for Identification of Piping Systems,” ASA A13-1928, reaffirmed 1947, New York. A proposed revision dated August 1953 will soon be available.
2.
American Standards Assoc, “Safety Color Code for Marking Physical Hazards and Identification of Certain Equipment,” ASA Z53.1-1953. Address of ASA: 70 E. 55th St., New York 17, N.Y.