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---Continued.

Title	Location on cylinder
Title	Top A	Band B	Band C	Body
Manufactured gas: coal, oil, water, producer, etc.	Brown	Yellow	Yellow	Yellow
Methane	Yellow	White	Yellow	Yellow
Methane air mixture	Black	Green	Yellow	Black
Methyl acetylene propadiene (MAPP) mixture	Yellow	Orange	Yellow	Yellow
Methylamine	Yellow	Brown	Yellow	Buff
Methyl bromide	Brown	Black	Brown	Brown
Methyl bromide (Fire only)	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, helium	Gray	Gray	Gray	Gray
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 (cryogenic)	Gray	Black	Black	Gray
Nitrogen (fire only)	Red	Gray	Gray	Red
Nitrogen, oil -free	Gray	Black	Black	Gray
Nitrogen, oil -free, Tetrafluoromethane (R--14)	Gray	Gray	Gray	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
Nitrogen, methane	Gray	Gray	Gray	Gray
Nitrogen, trifluoride	Brown	Green	Green	Brown