MIL-STD-101 Color Code For Pipelines And For Compressed Gas CylindersThis standard establishes a common color code for visual warnings to accompany the written identification of materials covered in piping systems and contained in compressed gas cylinders, and to facilitate the segregation of these cylinders at depots. This standard does not define the manner or conditions under which these materials may be used safely.

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MIL---STD---101C

TABLE III. Titles and color codes for compressed gas cylinders.

Title	Location on cylinder
Title	Top A	Band B	Band C	Body
Acetylene	Yellow	Yellow	Yellow	Yellow
Acrolein	Yellow	Brow	Black	Brown
Aerosol insecticide	Buff	Buff	Buff	Buff
Air, compressed, breathing	Black	Green	Black	Black
Air, carbon monoxide	Brown	Green	Brown	Brown
Air, dry, special purpose	Black	Green	Black	Black
Air, hexane	Black	Green	Yellow	Black
Air, hydrogen	Black	Green	Yellow	Black
Air, hydrogen sulfide	Black	Green	Brown	Black
Air, oil--free	Black	Green	Black	Black
Air, oil--tolerant	Black	Green	Green	Black
Alkyl decaborane	Yellow	Brown	Brown	Yellow
Air, methane	Black	Green	Yellow	Black
Alkyl pentaborane	Yellow	Brown	Brown	Yellow
Ammonia	Brown	Yellow	Orange	Orange
Argon, carbon Dioxide, helium	Gray	Gray	Gray	Gray
Argon	Gray	Gray	Gray	Gray
Argon, hydrogen	Gray	Yellow	Gray	Gray
Argon, oil--free	Gray	White	Gray	Gray
Argon, oil--tolerant	Gray	White	White	Gray
Argon--oxygen mixture	Gray	Green	White	Gray
Argon 90%, 5.0% oxygen, 5.0% carbon dioxide	Gray	Green	Gray	Gray
Boron trichloride	Gray	Brown	Gray	Brown
Boron trifluoride	Gray	Brown	Brown	Brown
Bromoacetone	Brown	Black	Black	Brown
Bromochlorodifluoromethane (Halon 1211) (Fire only)	Red	Red	Red	Red
Bromochloromethane	Buff	Gray	Buff	Buff
Bromochloromethane (Fire only)	Red	Gray	Red	Red