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Medical Gas Pipe Labeling

Service Text Color Background Color
Carbon Dioxide White Gray
Helium White Brown
Medical Air White Blue
Medical Air Black Yellow
Medical Air 50-55 psi Black Yellow
Medical Vacuum White Blue
Medical Vacuum Black White
Nitrogen White Black
Nitrogen 180-200 psi White Black
Nitrous Oxide White Blue
Nitrous Oxide 50-55 psi White Blue
Oxygen White Green
Oxygen 50-55 psi White Green

NFPA 99, "Standards for Health Care Facilities," establishes labeling requirements for medical gas systems. Compliance with NFPA 99 is required for JCAHO certification.

NFPA 99 Section 5.1 requires that all pipes carrying medical gas must be permanently labeled with their contents, direction of flow, and pressure (if between 200 and 300 psi). The text of the label should run parallel to the pipe and must be at least 3/8" tall. The table above shows the standard colors and designations established by the code.

Labels must appear in the following locations:

  • At intervals of 20' or less
  • At changes of direction
  • Before and after barriers
  • At inlets and outlets
  • Vertically, at every floor
  • On access doors to enclosures containing piping, valves, or other medical gas components.

Valves and cylinders. Valves on pipes containing medical gas or vacuum should carry tags bearing the inscription "(Name of gas) (source, main line, riser for, service) shut-off valve for (location). Do not open or close valve except in an emergency." Cylinders containing compressed gases must be labeled to indicate their contents.

Door labels. NFPA 99 specifies the text that is to appear on doors to enclosures containing medical gas components, depending on the type of gas. Door labels should read:

  • Oxidizing gases:
    CAUTION OXIDIZING GAS(ES) STORED WITHIN
    NO SMOKING
  • Medical air:
    CAUTION MEDICAL GASES
    NO SMOKING OR OPEN FLAME
  • Other gases:
    CAUTION MEDICAL GASES
    NO SMOKING OR OPEN FLAME
    ROOM MAY HAVE INSUFFICIENT OXYGEN
    OPEN DOOR AND ALLOW ROOM TO VENTILATE BEFORE ENTERING

Our label printers offer a quick and economical solution for NFPA 99 compliance, without the need to order out and wait for delivery. You can create exactly the type of labels, valve tags, and door signs that your facility requires, saving you time and money.

To learn more about pipe markers or label printers, or to place an order, please give us a call at the number below. Our friendly customer service staff will be glad to answer your questions. We are open 6:00 AM–5:00 PM Pacific time, Monday through Friday.

Looking for pre-printed self adhesive pipe labels? Call 1-888-326-9244 for more information or to order labels today.

The information presented in this document was obtained from sources that we deem reliable; Graphic Products does not guarantee accuracy or completeness. Graphic Products, Inc. makes no representations or warranties of any kind, express or implied. Users of this document should consult municipal, state, and federal code and/or verify all information with the appropriate regulatory agency.

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