Identifying colors used for fluids transported in piping systems according ANSI A13.1 version 1996 and 2015 are indicated below.
ANSI A13.1-1996
Fluid Service | Color Code |
Material Inherently Hazardous |
Yellow/Black |
Flammable or Explosive Chemical Active or Toxic Extreme Temp. of Pressures Radioactive |
Yellow/Black |
Material of Inherently Low Hazard |
Green/White |
Liquid or Liquid Admixtures |
Green/White |
Material of Inherently Low Hazard |
Blue/White |
Gas or Gaseous Admixtures |
Blue/White |
Fire Quenching Fluids |
Red/White |
Water, Foam, CO2, Halon, etc |
Red/White |
ANSI A13.1-2015
Fluid Service | Color Code |
Flammable & Oxidizing Fluids |
Yellow/Black |
Potable, Cooling, Boiler Feed & Other Waters |
Green/White |
Compressed Air |
Blue/White |
Fire Quenching Fluids |
Red/White |
Toxic and Corrosive Fluids |
Orange/Black |
Combustible Fluids |
Brown/White |
Defined by User |
White/Black |
Defined by User |
Gray/White |
Defined by User |
Black/White |
Possible (not mandatory) use of color codes for different types of applications are indicated below.
| Color Code |
Fluid | ANSI 13.1 - 1996 | ANSI 13.1 - 2015 |
Acetic Acid |
Yellow/Black |
Orange/Black |
Acetone |
Yellow/Black |
Yellow/Black |
Acetylene Gas |
Yellow/Black |
Yellow/Black |
Acid |
Yellow/Black |
Orange/Black |
Air |
Green/White |
Blue/White |
Alcohol |
Yellow/Black |
Yellow/Black |
Alum |
Green/White |
|
Ammonium Nitrate |
Yellow/Black |
Yellow/Black |
Amyl Acetate |
Yellow/Black |
Yellow/Black |
Antidote Gas |
Blue/White |
|
Argon |
Green/White |
|
Benzol |
Yellow/Black |
Yellow/Black |
Bisulphite Liquor |
Yellow/Black |
Yellow/Black |
Blau Gas |
Yellow/Black |
Yellow/Black |
Bleach Liquor |
Yellow/Black |
Yellow/Black |
Blow-off Water |
Yellow/Black |
Green/White |
Boiler Feed Water |
Yellow/Black |
Green/White |
Brine |
Green/White |
Green/White |
Burner Gas |
Yellow/Black |
Brown/White |
Butane |
Yellow/Black |
Brown/White |
Butyl Alcohol |
Yellow/Black |
Yellow/Black |
Calcium Chloride |
Blue/White |
Orange/Black |
Carbon Bisulphide |
Yellow/Black |
Orange/Black |
Carbon Dioxide |
Yellow/Black |
Orange/Black |
Carbon Monoxide |
Yellow/Black |
Orange/Black |
Carbonated Water |
Green/White |
Green/White |
Caustic Soda |
Yellow/Black |
Orange/Black |
Chlorine |
Yellow/Black |
Orange/Black |
Chlorine Gas |
Yellow/Black |
Orange/Black |
Chloroform |
Yellow/Black |
|
Circulating Water |
Green/White |
Green/White |
City Gas |
Yellow/Black |
Brown/White |
City Water |
Green/White |
Green/White |
Coal Gas |
Yellow/Black |
Brown/White |
Cold Water |
Green/White |
Green/White |
Compressed Air |
Green/White |
|
Condensate |
Yellow/Black |
Green/White |
Cooling Water |
Green/White |
Green/White |
Cottonseed oil |
Yellow/Black |
|
Cutting Oil |
Green/White |
|
Diesel Oil |
Yellow/Black |
Brown/White |
Distilled Water |
Green/White |
Green/White |
Drain Oil |
Yellow/Black |
|
Drain Water |
Green/White |
Green/White |
Drinking Water |
Green/White |
Green/White |
Dye |
Yellow/Black |
Orange/Black |
Ethan Dye |
Yellow/Black |
Orange/Black |
Exhaust Air |
Green/White |
|
Exhaust Gas |
Yellow/Black |
|
Exhaust System |
Yellow/Black |
|
Filtered Water |
Blue/White |
Green/White |
Fire Protection Water |
Red/White |
Red/White |
Flue Gas |
Yellow/Black |
|
Foamite |
Red/White |
|
Formalin |
Yellow/Black |
|
R-12 dichlorodifluoromethane |
Green/White |
|
Fresh Water |
Green/White |
Green/White |
Fuel Gas |
Yellow/Black |
Brown/White |
Fuel oil |
Yellow/Black |
Brown/White |
Gas |
Yellow/Black |
Brown/White |
Gasoline |
Yellow/Black |
Brown/White |
Glycerine |
Green/White |
|
Heating Returns |
Yellow/Black |
Green/White |
Heating Steam |
Yellow/Black |
|
Helium |
Green/White |
|
Hot Water |
Yellow/Black |
Green/White |
Hydrochloric Acid |
Yellow/Black |
Orange/Black |
Hydrogen |
Yellow/Black |
Yellow/Black |
Hydrogen Peroxide |
Yellow/Black |
Orange/Black |
Hydrogen Sulphide |
Yellow/Black |
Orange/Black |
Industrial Water |
Green/White |
Green/White |
Instrument Air |
Green/White |
Blue/White |
Kerosone |
Yellow/Black |
Brown/White |
Lacquer |
Yellow/Black |
Yellow/Black |
Lactic Acid |
Yellow/Black |
Orange/Black |
Linseed Oil |
Yellow/Black |
Yellow/Black |
Lubricating Oil |
Yellow/Black |
|
Make-up Water |
Green/White |
Green/White |
Mercury |
Yellow/Black |
|
Methyl Chloride |
Yellow/Black |
Orange/Black |
Mixed Acid |
Yellow/Black |
Orange/Black |
Mixed Gas |
Yellow/Black |
|
Monoethanolamine |
Green/White |
|
Muriatic Acid |
Yellow/Black |
Orange/Black |
Naphtha |
Yellow/Black |
Yellow/Black |
Natural Gas |
Yellow/Black |
Brown/White |
Nitric Acid |
Yellow/Black |
Orange/Black |
Nitrogen |
Green/White |
|
Nitrogen Oxide |
Yellow/Black |
|
Oil |
Yellow/Black |
Yellow/Black |
Oil, lubricating |
Yellow/Black |
Yellow/Black |
Oil, soluble |
Yellow/Black |
Yellow/Black |
Oxygen |
Yellow/Black |
Yellow/Black |
Paint |
Yellow/Black |
Yellow/Black |
Peanut Oil |
Yellow/Black |
Yellow/Black |
Phenol |
Yellow/Black |
Yellow/Black |
Phenol |
Yellow/Black |
Yellow/Black |
Process Gas |
Yellow/Black |
Yellow/Black |
Producer Gas |
Yellow/Black |
Yellow/Black |
Propane Gas |
Yellow/Black |
Brown/White |
Raw Water |
Green/White |
Green/White |
Refrigerated Water |
Green/White |
Green/White |
River Water |
Green/White |
Green/White |
Salt Water |
Green/White |
Green/White |
Sanitary Sewer |
Green/White |
Green/White |
Soda Ash |
Green/White |
Orange/Black |
Solvent |
Yellow/Black |
Yellow/Black |
Soybean Oil |
Yellow/Black |
Yellow/Black |
Sprinkler Water |
Red/White |
Red/White |
Steam |
Yellow/Black |
|
Storm Sewer |
Green/White |
Green/White |
Sugar Juice |
Green/White |
|
Sulhur Chloride |
Yellow/Black |
Orange/Black |
Sulphur Dioxide |
Yellow/Black |
Orange/Black |
Sulphuric Acid |
Yellow/Black |
Orange/Black |
Tar |
Yellow/Black |
|
Toluene |
Yellow/Black |
Yellow/Black |
Toluol |
Yellow/Black |
Yellow/Black |
Trichlorethylene |
Yellow/Black |
Yellow/Black |
Turpentine |
Yellow/Black |
Yellow/Black |
Vapor |
Yellow/Black |
|
Varnish |
Yellow/Black |
Yellow/Black |
Vegetable Oil |
Yellow/Black |
Yellow/Black |
Waste Water |
Green/White |
Green/White |
Water |
Green/White |
Green/White |
Water Gas |
Yellow/Black |
Brown/White |