Color Code for Markers: ANSI A13.1-2020 Standard Scheme for Identification of Piping Systems.
Yellow / Black Lettering
Materials Inherently Hazardous:
Flammable,Toxic, Explosive, Chemically active or Explosive.
Red / White Lettering
Fire Quenching Materials:
Indicates Sprinkler Systems and Fire Protection Equipment.
Green / White Lettering
Inherently Low Hazard Material:
Non-Toxic, Non-Poisonous, Does not produce fire or explosions.
Blue / White Lettering
Inherently Low Hazard Gases:
Identifies Gases with little or no threat to Life or property.
