MIL-STD-101B (3 December 1970)

DoD Color Code for Pipelines and Compressed Gas Cylinders

The use of color coding covered by this standard is mandatory for all Departments and Agencies of the Department of Defense, with regards to the purchase and use of compressed gas cylinders.

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Title Top "A" Band "B" Band "C" Body
Acetylene | NSN Yellow Yellow Yellow Yellow
Acrolein Yellow Brown Black Brown
Aerosol Insceticide Buff Buff Buff Buff
Air, compressed, breathing Black Green Black Black
Air, dry, special purpose Black Green Black Black
Air, oil-free Black Green Black Black
Air, oil-tolerant Black Green Green Black
Alkyl Decaborane Yellow Brown Brown Yellow
Alkyl Pentaborane Yellow Brown Brown Yellow
Ammonia Brown Yellow Orange Orange
Argon, oil-free | NSN Gray White Gray Gray
Argon, oil-tolerant Gray White White Gray
Argon-Oxygen Mixture Gray Green White Gray
Boron Trichloride Gray Brown Gray Brown
Boron Trifluoride Gray Brown Brown Brown
Bromoacetone Brown Black Black Brown
Bromochloromethane Buff Gray Buff Buff
Bromochloromethane (Fire) Red Gray Red Red
Bromotrifluoromethane Orange White Gray Orange
Bromotrifluoromethane (Fire) Red White Gray Red
Butadiene Yellow White Buff Buff
Calibrating Gas Mixture (N.O.S.) See Special Instructions
Carbon Dioxide Gray Gray Gray Gary
Carbon Dioxide (Fire) Red Red Red Red
Carbon Monoxide Yellow Brown Brown Brown
Chloroacetone Black Brown Black Brown
Chlorine Brown Brown Brown Brown
Chlorine Trifluoride Brown Green Brown Brown
Chloropicrin Brown Orange Orange Brown
Cyanogen Yellow Brown Yellow Brown
Cyclopropane, medical Orange Yellow Blue Blue
Diborane Yellow Brown Brown Yellow
Dibromodifluoromethane Buff White Buff Buff
Dibromodifluoromethane (Fire) Red White Red Red
Difluorochloroethane Gray Yellow Yellow Orange
Difluoroethane Gray Yellow Orange Orange
Dihydrotetraborane Yellow Brown Brown Yellow
Dimethylamine, anhydrous Yellow Blue White Buff
Dimethylether Yellow Brown Buff Buff
Dispersant, Dichlorodifluoromethane
/Difluorethane Mixture (Halocarbon)
Buff Gray Gray Buff
Ethane Yellow Blue Yellow Yellow
Ethyl Chloride Buff Blue Yellow Buff
Ethyl Nitrite Yellow Buff Buff Buff
Ethylamine, anhydrous Yellow Blue Blue Buff
Ethylene, Industrial Blue Yellow Buff Buff
Ethylene, Medical Yellow Blue Blue Blue
Ethylene Oxide Yellow Blue Buff Buff
Fluorine Brown Green Green Brown
Fumigant, Carbon Dioxide/
Ethylene Oxide Mix
Buff Blue Buff Buff
Fumigant, Ethylene Oxide/
Dichlorodifluoromethane Mix
Buff Buff Buff Buff
Helium, oil-free / medical Buff Gray Gray Gray
Helium, oil-tolerant Gray Orange Gray Gray
Helium-Oxygen Mixture Buff* White** Green Green
Hydrogen Yellow Black Yellow Yellow
Hydrogen Bromide Black Brown Brown Brown
Hydrogen Chloride, anhydrous Brown White Brown Brown
Hydrogen Cyanide, anhydrous Yellow Brown White Brown
Hydrogen Fluoride, anhydrous Green Brown Brown Brown
Hydrogen Sulfide Brown Yellow Brown Brown
Krypton, oil-free Gray Buff Gray Gray
Krypton, oil-tolerant Gray Buff Buff Gray
Methane Yellow White Yellow Yellow
Methyl Acetylene
Propadiene (MAPP)
Yellow Orange Yellow Yellow
Methylamine Yellow Brown Yellow Buff
Methyl Bromide Brown Black Brown Brown
Methyl Bromide (Fire) Red Brown Red Red
Methyl Chloride Yellow Brown Orange Orange
Methyl Mercaptan Brown Yellow Yellow Brown
Methyl Sulfide Yellow Brown Buff Brown
Methylene Chloride Gray Blue Orange Orange
Natural Gas Yellow Brown Yellow Yellow
Neon, oil-free White Buff Buff Gray
Neon, oil-tolerant White Buff Gray Gray
Nickel Carbonyl Yellow White Yellow Brown
Nitric Oxide Brown Buff Brown Brown
Nitrogen, Oil-Free Gray Black Black Gray
Nitrogen, Oil-Tolerant Gray Black Gray Gray
Nitrogen Dioxide Brown Buff Buff Brown
Nitrogen-Helium Mixture Gray Black Orange Gray
Nitrogen-Oxygen Mixture Black White Green Green
Nitrosyl Chloride Brown White White Brown
Nitrous Oxide Blue Blue Blue Blue
Oxygen | NSN Green Green Green Green
Oxygen, Aviator's Green White Green Green
Oxygen, Eletroylitic Green White White Green
Oxygen, Medical White Green Green Green
Oxygen - Carbon Dioxide Mix Gray White Green Green
Oxygen Fluoride Green Brown Green Brown
Ozone Brown Green Green Green
Pentaborane, Stable Yellow Brown Brown Yellow
Petroleum gas: Acetogen, Butane,
butane-propane, Isobutane, Isobutylene,
Neopentane, Propane
Yellow Orange Yellow Yellow
Phenylcarblamine Chloride Brown Gray Gray Brown
Phosgene Brown Orange Brown Brown
Propylene Yellow Gray Buff Buff
R-11, Trichlorofluoromethane Orange Orange Orange Orange
R-12, Dichlorodifluoromethane Orange Orange Orange Orange
R-13, Chlorotrifluoromethane Orange Orange Orange Orange
R-22, Chlorodifluoromethane Orange Orange Orange Orange
R-113, Trichlorotrifluoromethane Orange Orange Orange Orange
R-114, Dichlorotetrafluoroethane Orange Orange Orange Orange
R-500, Dichlorodifluoromethane
/Difluorethane Mixture (Halocarbon)
Orange Orange Orange Orange
R-502, Monochlorodifluoromethane Orange Orange Orange Orange
R-134a, Tetrafluoroethane Orange Orange Orange Orange
Sulfur Dioxide Brown Gray Brown Brown
Sulfur Hexafluoride | NSN Gray White Black Gray
Tetrafluoroethylene, inhibited Buff White White Buff
Trimethylamine Yellow Blue Orange Buff
Vinyl Bromide Buff Blue Blue Buff
Vinyl Chloride Yellow Orange Buff Buff
Vinyl Methyl Ether Yellow Black Buff Buff
Xenon, oil-free White Black Gray Gray
Xenon, oil-tolerant White Black Black Gray

N.O.S. - Not Otherwise Specified

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Last Updated 98 JUL 03
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