Purpose: This program is designed to minimize or eliminate fire hazards
associated with hot work operations.
Scope: This program applies to all NCSU units conducting Hot Work, as
defined in the terms, on University owned or leased property.
NOTE: This policy
is not intended for areas specifically intended and designated for the conducting
of hot work.
Hot work shall not be conducted in any area other than those specifically
intended and designed for conducting said work unless the area has been inspected
and a Hot Work Permit issued to the person(s) who will be
conducting the actual work.
Only approved apparatus such as torches, regulators, pressure reducing
valves pressure reducing valves, acetylene generators, machines, manifolds,
cables and hoses in good repair will be used.
- Manufacture's procedures/recommendations will be followed with respect
to the sequence of operations for lighting or safing equipment.
- Only acetylene tanks that have been in the vertical position for a
minimum of 2 hours will be used.
- Torches will be pointed away from people and combustible materials
- Torches will be lit with a friction lighter or stationary pilot flame.
Torches will not be lit off from hot metal.
- When equipment is not going to be used for periods of 30 minutes or
more or when left unattended the equipment will be shut off.
- Only people who are trained and proficient will conduct hot work.
Trainees may perform work only when their trainer or supervisor is in the
Hot Work Permits will be issued by Deputy Fire Marshals of Environmental Health
Fire Protection Division or other designated individuals
only after conducting a visit of the work site and ensuring the area is fire
safe and/or providing the necessary instructions to ensure such safety. To request a Hot Work Permit, please call Fire Protection at 515-2568
- If in the Inspectors opinion the area is not safe, work will postponed
until such time as the area is made safe
- The Director of Environmental Health and Campus Police or his appointed
representative can also authorize permits in the event a inspector can not
be reached and respond in a reasonable amount of time.
- In the event of an emergency where waiting for an inspector to respond
would allow immediate increasing damage to University property or critical
research project the, individual conducting the hot work will insure the
area is fire safe and then may proceed to effect necessary repairs.
- The signed permit authorizing the work will be readily available in
the immediate area where the hot work is being conducted.
- Permits will generally be issued for a twelve hour only. However,
in areas where the work will be ongoing for an extended period of time permits
can be issued for periods not to exceed seventy-two hours as long as the
work or situational factors do not change. Extended permits may only be
issued by Deputy Fire Marshals of Environmental Health and Campus Police's
Fire Protection Division
Where sprinkler protection exists it will be fully operational while hot
work is being performed and the proper fire extinguishing equipment will be
- If hot work is to be done within 3 feet of automatic sprinkler heads,
noncombustible sheet material or damp cloth guards will be used to temporarily
shield the individual heads. The Safety Inspector conducting the pre-work
inspection will specify when issuing the permit.
- Hot work will not be conducted in buildings with installed sprinkler
systems when the system is inoperable, unless other means of fire detection,
reporting and extinguishing have been approved by the Fire Marshal and HSB
Industrial Risk Insurers have been notified and consent to the work
- Smoke detectors in the immediate area may be bagged per the instructions
of the Safety Inspector in order to prevent contamination of the head and
reduce nuisance alarms. This will also, leave as much of the fire detection
system as intact as possible to detect abnormal conditions in other parts
of a facility.
- When a detector is bagged the personnel performing the work necessitating
the bagging will remove the bag immediately after finishing the work.
If work will extend throughout an entire day or following days the bags
will be removed any time the personnel conducting the work will be gone
for 30 or more minutes.
When it is necessary to conduct hot work in a confined space, permits
will not be approved unless Environmental Health and Safety has approved entry
into the area.
- When working in a confined space the equipment shall be positioned
outside the confined space in such a manner that it will not interfere with
Where possible all combustible materials located within 35 feet of the
operation (example: items that still contain or have contained explosive hydrogen
gas, etc.) will be removed
- Hot work will never be conducted within 50 feet of flammable liquids
(flashpoint below 100 degrees Fahrenheit (F)).
- Whenever there are cracks or other floor openings that can not be
closed or covered within 35 feet of the hot work precautions may be directed
by the Safety Inspector, dependent on the situation to remove or otherwise
protect combustible materials on the floor below that may be exposed to
sparks. The same precautions will be observed with regard to cracks or openings
in walls, open doorways, and open or broke windows.
- Combustible floors and other interior finishes will be kept wet or
protected by fire resistant shielding. Where floors have been wet down or
shielding put down rigid control will be exercised over the grounding of
equipment. In addition, personnel shall be protected from possible shock.
Caution will be exercised against slips and falls on any wet surfaces.
A fully charged and operable fire extinguisher(s), appropriate for the
work will be kept in the immediate the work area at all times while hot work
is in progress. Note: Fire extinguishers located inside of buildings or at
distances of 15 feet or greater, or where there are obstacles in the direct
path of access to the extinguisher then the extinguisher will not be considered
Fire watcher(s) procedures will be implemented whenever hot work is being
conducted within 35 ft of combustible materials, regardless of the protection
provided. A qualified person proficient in the operation of available fire
extinguishing equipment and knowledgeable of emergency reporting procedures
will observe the hot work area. Their responsibility is to detect and prevent
the spread of fire produced by the hot work. An additional fire watcher may
be required to observe areas that are hidden from the view of a single fire
watcher (other side of partition, walls, ceilings, etc).
- A fire watch shall be maintained for at least 30 minutes following
the completion of the hot work to detect and extinguish possible smoldering
When hot work is to be conducted in outside areas, the work should be
moved to a fire safe area. If this is not possible the area will be made fire
safe by removing or protecting the combustibles from ignition sources.
All work using asphalt or tar kettle(s) will comply with North Carolina
State Building Code Volume V - Fire Prevention section 502.8 and with National
Fire Protection Association Standard 1 section 3-12
- Fire safe - No threat of fire
- Fire watcher - A person assigned to work with a welder, normally outside
an authorized area to watch for fires resulting from hot work. Fire watchers
will have fire extinguishing equipment readily available and be trained in
its use. They will be familiar with the location of and the use of the nearest
fire alarm or means to notify the fire department. They should attempt to
extinguish fires only when obviously within the capacity of their equipment;
or otherwise sound the alarm. A fire watcher should have no other duties except
to watch for signs of fire during the operation and the 30 minutes following.
- Hot work - Hot work is considered welding, soldiering, cutting, brazing,
grinding, use of asphalt / tar kettle(s), or other work that might create
sufficient heat or spark which could start a fire.