NFPA 99C 2002 Edition

• Piping should be labeled by means of stenciling or adhesive markers that identify the system.
• Pipe labels should show the name of the gas/vacuum system or the chemical symbol
• Pipe labels should show the name of the gas/vacuum system or the chemical symbol
• Color identification of piping used should be in accordance with the gases and colors indicated in CGA Pamphlet C-9
• Service outlets and inlets should be identified as to the name or chemical symbol for the specific gas or vacuum provided

Pipe labels should be located as follows:

• At intervals of not more than 20 feet
• At least once in or above every room or area
• On both sides of walls or partitions penetrated by the piping
• At least once in every story height traversed by risers
• Flow arrows should point from the station inlet toward the receiver or pump (Vacuum Systems)
• Flow arrows should point from the terminal to the vacuum producer (WAGD Systems)

CGA Pamphlet C-9 1988

This standard sets forth color uniformity for the identification and marking of medical equipment intended for use with specific medical gases. Colors shown on the table below should be used on containers which are intended for medical use color marked according to the gases they contained.

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NFPA 99 TABLE 5.1.11 Standard Designation Colors and Operating Pressures for Gas and Vacuum Systems