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NFPA 99
Changes
Below are some of the changes of Level
I facilities from the 2002 to the 2005 edition of NFPA-99. We have
not listed every change, but rather those we have deemed of greatest
importance. For a thorough review of the changes, please consult both the
2002 and 2005 editions of NFPA-99. The changes listed below are not intended
to be an exhaustive list of every change made.
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Central Supply System (bulk gases and high pressure
manifolded gases) |
5.1.3.1.3 (liquid container labeling)
"Liquid containers shall have additional product identification
visible from all directions with a minimum of 51 mm (2 in.) high
letters such as a 360 degree wraparound tape for medical liquid
containers"
5.1.3.1.4 (non-interchangeable connections)
"Cryogenic liquid containers shall be provided with gas-specific
outlet connections in accordance with CGA V-5, Diameter-Index
Safety System (Non-interchangeable Low Pressure Connections for
Medical Gas Applications), or CGA V-1, Compressed Gas
Association Standard for Compressed Gas Cylinder Valve Inlet and
Outlet Connections."
5.1.3.1.5 (un-removable connectors to containers)
"Cylinder and cryogenic liquid container outlet connections shall be
affixed in such a manner as to be integral to the valve(s),
un-removable with ordinary tools or so designed as to render the
attachment point unusable when removed."
5.1.3.1.6 (contents shall be checked)
"Contents of cylinder and cryogenic liquid containers shall be
verified prior to use."
5.1.3.3.2(7) (cylinders no longer need to be individually
chained)
"Be provided with racks, chains, or other fastenings to secure all
cylinders, whether connected, unconnected, full, or empty, from
falling."
5.1.3.4.12.4(1) (equal headers - not just 2)
"Two equal headers, per 5.1.3.4.9, each having sufficient number of
liquid container connections for an average day's supply, and with
the headers connected to the final line pressure regulator assembly
in such a manner that either header may supply the system"
5.1.3.4.12.9(2) (new alarm point for hybrid manifolds)
"Where a hybrid arrangement is employed, when or at a predetermined
set point before the secondary (cylinder) header contents fall to
one day's average supply, indicating secondary low"
5.1.3.4.13 (The entire bulk cryogenic liquid system section has
been re-written. Refer to the NFPA-99 2005 catalog for changes) |
| Medical Air Compressor Systems |
5.1.3.5.4.1(3) (Rotating element compressors are now allowed)
"Rotating element compressors provided with a compression chamber
free of oil that provides the following:
(a) Separation of each oil-containing section from the compression
chamber by at least one seal having atmospheric vents on each side
with the vent closest to the oil-containing section supplied with a
gravity drain to atmosphere
(b) Unobstructed visualization of the atmospheric vent(s), closest to
each oil-containing section, that is accessible for inspection with
out disassembling the compressor
(c) Entry of the rotating shaft into each compressor chamber at a point
that is above atmospheric pressure
(d) The facility operators to confirm proper seal operation by direct
visual inspection of the atmospheric vents
5.1.3.5.12.3(6) (after power loss, compressors must automatically
restart)
"Automatic restart function such that compressor(s) will restart
after power interruption without manual intervention"
5.1.3.5.15 (Dew point / CO monitor activation)
"Dew point and carbon monoxide monitors shall activate the
individual monitor's signal at all master alarm panels if the
monitor loses power."
5.1.9.2.4(10) (medical air dew point level change)
"A medical air dew point high alarm from each compressor site to
indicate when the line pressure dew point is greater than +2°C
(+35°F)
Note: The above paragraph contradicts others
within the standard:
5.1.3.5.15(1) "...+4°C (+39°F)"
table 5.1.12.3.12.3 ..."4°C (39°F)" |
| Instrument Air Systems |
5.1.3.8.11 (Electrical power and controls are required to be
similar to the medical air compressor controls. The points of this
section are too numerous to note here. Please see this particular
section in NFPA-99 2005 edition) |
| Medical-Surgical Vacuum Systems |
5.1.3.6.6.3(6) (after power loss, pumps must automatically
restart)
"Automatic restart function such that pump(s) will restart after
power interruption without manual intervention" |
| Waste Anesthetic Disposal Systems (WAGD) |
5.1.3.7.2.2 (low vacuum level WAGD systems)
"Vacuum producers (e.g., fans or blowers) designed for operation at
vacuum levels below 130 mm (5 in.) HgV shall be as follows:
(1) Permitted to be made of any materials determined by the manufacturer
as suitable for the service
(2) Provided with anti-vibration mountings as required by equipment
dynamics or location in accordance with the manufacturer's
recommendation
(3) Connected with their intake and outlet piping through flexible
connections
(4) Used only for WAGD service and not employed for other services
(5) Interconnected via piping, ductwork, and so on made of materials
determined by the manufacturer as suitable to the service"
5.1.3.7.3 (distance of WAGD piping to medical vacuum piping)
"If WAGD is joined to vacuum piping, it shall be connected a minimum
distance of 1.5 m (5 ft) from any vacuum inlet"
5.1.3.7.5.3(6) (after power loss, pumps must automatically
restart)
"Automatic restart function such that pump(s) will restart after
power interruption without manual intervention" |
| Piping Infrastructure |
5.1.4.5 (mainline supply valve not required if...)
"A shut off valve shall be provided in the main supply line inside
of the building, except where one or more of the following
conditions exist:
(1) The source and the source valve are located inside the building
served.
(2) The source system is physically mounted to the wall of the building
served and the pipeline enters the building in the immediate
vicinity of the source valve."
5.1.10.2.2.1 (vacuum pipe must be marked)
"If copper vacuum tubing is installed along with any medical gas
tubing, the vacuum tubing shall, prior to installation, be
prominently labeled or otherwise identified to preclude using
materials or installation procedures in the medical gas system that
are not suitable for oxygen service."
5.1.10.2.2.2 (marking pipe is not required if its meets this
standard)
"If medical gas tube (ASTM B 819, Standard Specification for
Seamless Copper Tube for Medical Gas Systems) is used for vacuum
piping, such special marking shall not be required, provided the
vacuum piping installation meets all other requirements for medical
gas piping, including the prohibition of flux on copper to copper
joints and the use of nitrogen purge while brazing."
5.1.10.2.3(2) (low vacuum WAGD pipe may be any suitable material)
"In systems operated under 130 mm (5 in.) HgV maximum vacuum only,
using any non-corroding tube or ductwork" |
| Alarms - see specific pieces of source equipment (i.e
medical compressors, etc) for alarm changes pertinent to those items |
5.1.9.2.2 (computers may be used as a master alarm)
"A centralized computer system shall be permitted to be substituted
for one of the master alarms required in 5.1.9.2.1, if the computer
system complies with 5.1.9.4."
Note: the computer system must meet the
requirements of the master alarms.
5.1.9.3.4(2) (alarm sensors for anesthetizing locations can be on
either side of the zone valve box)
"Area for anesthetizing gas delivery shall have the sensors
installed either on the source side of any of the individual room
zone valve box assemblies or on the patient or use side of each of
the individual zone valve assemblies" |
| Installation |
5.1.10.6 (gas tungsten arc welding allowed. The points of
this section are too numerous to note here. Please see this
particular section in NFPA-99 2005 edition)
5.1.10.7(4) (new fitting allowed)
"Axially swaged, elastic strain preload fittings providing metal to
metal seal having pressure and temperature ratings not less than
that of a brazed joint and when complete are permanent and
nonseparable"
5.1.10.10.5.3 (access and drainage are required of split joints)
"If underground piping is protected by a conduit, cover, or other
enclosure, the following requirements shall be met:
(1) Access shall be provided at the joints for visual inspection and leak
testing.
(2) The conduit, cover, or enclosure shall be self-draining and not
retain groundwater in prolonged contact with the pipe." |
| Testing |
5.1.12.3.8.4 (limit change of hydrocarbons)
"The difference between two tests shall in no case exceed the
following:
(1) Total hydrocarbons (excluding methane), 5 ppm
(2) Halogenated hydrocarbons, 5 ppm"
5.1.12.3.9.2 (ultrasonic leak detectors for vacuum pipe)
"Each joint in the final connection between the new work and the
existing system shall be leak-tested with the gas of the system
designation at the normal operating pressure by means of soapy water
or other means safe for use with oxygen. Vacuum joints shall be
tested using an ultrasonic leak detector or other means that will
permit detection of leaks in an active vacuum system" |
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