01-06M
11.6 Piping Systems:
A. Design pressure piping systems not to exceed 35 kPa (5 psi) loss from
source to point of use. Design vacuum piping systems not to exceed 10
kPa (3 inches Hg) from source to point of use.
B. The main supply line shall be provided with a shut-off valve. Locate
the valve to be accessible by authorized personnel only and be
downstream of the source valve and outside of the source room,
enclosure or where the main enters the building. Identify this valve.
A main source valve is not required if the source valve is accessible
within the building.
C. Each branch or riser supplied from the main line shall have an in-
line shut-off valve adjacent to the main. Each branch supplied from a
riser shall have an in-line shut-off valve adjacent to the riser.
Conceal in-line shut-off valves (e.g. above ceiling with ceiling tag,
or in a locked equipment room), and make provision to lock them open.
D. Include a zone valve, in a cabinet with other medical gas zone
valves, for all branches serving station outlets and inlets in
conformance with NFPA 99. Provide additional service valve above
ceiling to subdivide areas for maintenance.
E. Medical gas station outlets and vacuum station inlets in new
buildings shall be quick coupler type. Where building alterations or
additions occur, station outlets and inlets shall be compatible with
those of the existing building, without the use of secondary
adapters.
F. Locations of piped medical gas station outlets and vacuum station
inlets are indicated in VA Program Guide 7610 (Equipment Guide List),
under "Outlets".
G. Provide protective pipe enclosure for exterior oxygen line per NFPA
99. Burial depth shall be 600 mm (24 inches) below grade.
H. Coordinate the requirement for the use of ventilators with the VAMC
and design oxygen and medical air systems to accommodate their use.
11.7 Alarms:
A. Two master system alarms, in separate warning locations, are required
for each medical gas and vacuum system:
1. The primary warning location shall be supervised by engineering
personnel and is required to be located at one of the following
(in order of priority): boiler plant control office, engineering
control center or in the office of principal working area of the
individual responsible for maintenance of the medical gas system.
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