K-Tag K909

Gas and Vacuum Piped Systems – Information and Warning Signs

This regulation requires that piped gas and vacuum systems be labeled at regular intervals (no more than 20 feet) using stencils or adhesive markers that identify the gas or vacuum system by name or chemical symbol, color code, and operating pressure where non-standard. Piping must not be painted, and shutoff valves must be identified with the gas/vacuum system name or symbol, the room or area served, and a caution against non-emergency use. These are physical plant and safety labeling requirements applicable to facilities with piped gas and vacuum systems per NFPA 99 standards.

K909 Gas and Vacuum Piped Systems – Information and Warning Signs 
Piping is labeled by stencil or adhesive markers identifying the gas or 
vacuum system, including the name of system or chemical symbol, color 
code (Table 5.1.11), and operating pressure if other than standard. Labels 
are at intervals not more than 20 feet, are in every room, at both sides of 
wall penetrations, and on every story traversed by riser. Piping is not 
painted. Shutoff valves are identified with the name or chemic al symbol of 
the gas or vacuum system, room or area served, and caution to not use the 
valve except in emergency. 
5.1.14.3, 5.1.11.1, 5.1.11.2, 5.2.11, 5.3.13.3, 5.3.11 (NFPA 99)