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
Propylene	Yellow	Gray	Buff	Buff
Propyne	Gray	Yellow	Yellow	Yellow
R -11, Trichlorofluoromethane	Orange	Orange	Orange	Orange
R--12, Dichlorodifluoromethane	Orange	Orange	Orange	Orange
R -13, Chlorotrifluoromethane	Orange	Orange	Orange	Orange
R--21, Dichlorofluoromethane	Orange	Orange	Orange	Orange
R--22, Chlorodifluoromethane	Orange	Orange	Orange	Orange
R--113, Trichlorotrifluoroethane	Orange	Orange	Orange	Orange
R--114, Dichlorotetrafluoroethane	Orange	Orange	Orange	Orange
R -116, Hexafluoroethane	Gray	Gray	Gray	Gray
R--124A, Chlorotetrafluoroethane	Orange	Orange	Orange	Orange
R--500, Dichlorodifluoromethane/ Difluoroethane	Orange	Orange	Orange	Orange
R--501, Monochlorodifluoromethane/ Monochloropentafluoroethane	Orange	Orange	Orange	Orange
R--502, Monochlorodifluoromethane/ Monochloropentafluoroethane	Orange	Orange	Orange	Orange
Sulfur dioxide	Brown	Gray	Brown	Brown
Sulfur hexafluoride	Gray	White	Black	Gray
Tetrafluoroethylene, inhibited	Buff	White	White	Buff
Trifluoromethane (R--23), Tetrafluoromethane (R--14)	Gray	Gray	Gray	Gray
Trimethylamine, anhydrous	Yellow	Blue	Orange	Buff
Vinyl bromide	Buff	Blue	Blue	Buff
Vinyl chloride	Yellow	Orange	Buff	Buff
Vinyl methyl ether, inhibited	Yellow	Black	Buff	Buff
Xenon, oil -free	White	Black	Gray	Gray
Xenon, oil--tolerant	White	Black	Black	Gray