PROCEDURES FOR HOT WORK ON UNIVERSITY
Fire can be a major threat to the University. Particular care
must be taken to prevent fire from starting, and to ensure that a
fire, should it occur, can be quickly spotted, controlled and
Hot work provides an ignition source and therefore is a
potential cause of fire. This set of procedures specifies safe
procedures for welding, cutting, burning and other similar hot
processes carried out on the University premises and are intended
to protect personnel and property from possible fire and
explosion hazards arising from such work.
This set of procedures applies to all hot work operations
carried out on the premises of the Hong Kong University of
Science and Technology by the University employees as well as
Hot Work shall refer to electric arc, gas welding and cutting,
lighting of fires or any other activities which could result in
the deliberate introduction of an ignition source into the work
4. CONTROL OF HOT WORK
||Whenever practicable, all hot work
should be carried out in a workshop designated for that
||Hot work must NOT be permitted in or
near rooms containing flammable vapours, liquids, dusts,
or on or inside of closed tanks/other containers which
have held such materials.
||When hot work is to be carried out at
locations other than in designated workshops or areas,
the Hot Work Permit Procedures must be followed. The Hot
Work Permit Procedures are stipulated in 4.4 below.
||Hot Work Permit Procedures
||Before any hot work commences,
the supervisor responsible for the work should
request a Hot Work Permit at HSEO at least one
day before the commencement of the hot work.
After the Permit has been signed by HSEO, it has
to be taken to the Security Control Centre (SCC)
for signatory by the Duty Security Controller
||The original Permit should be
handed to the person carrying out the hot work
who shall ensure that the safety precautions
stipulated on the Permit are observed. The Permit
must be posted at a conspicuous location at the
||The SCC should maintain a
Register of all Permits issued.
||Representatives from HSEO should
perform periodic inspections of the area to
assure that all the safety precautions are met.
||Patrolling security personnel
should pay special attention to areas where hot
works are being carried out.
||Representatives from the
department responsible for the hot work should
also perform periodic inspections of the hot work
area to ensure that the appropriate safety
precautions are being complied with.
||The work should be stopped
immediately if the working condition is
considered hazardous until the situation has been
improved to the satisfaction of HSEO.
||If the hot work cannot be
completed in one day, at the completion of a
days work, the supervisor or the person in
charge of the hot work shall notify the SCC so
that appropriate follow-up inspection can be
||At the completion of the work or
upon expiry of the Permit, the original Permit
should be returned to the HSEO. SCC should also
be informed of the completion.
||The Permit should be signed off
by HSEO upon satisfactory completion of the
||A Hot Work Permit should only be
valid for the period specified on the Permit and
under no circumstances shall it exceed one week.
A new Permit should be required for future
resumption of the hot work.
following precautions must be observed for hot work
||Appropriate fire extinguishers
should be available near the hot work area. The
person carrying out the hot work or somebody
standing-by should be familiar with the use of
||The work area should be
adequately ventilated to prevent the accumulation
of toxic or flammable vapours.
||All flammable or highly
combustible materials should be removed at least
10 metres away from the point of hot work. Any
combustible materials which cannot be moved
should be protected by non-combustible screens
(e.g. metal or glass fibre). Combustible
materials which could be ignited by conduction
should be removed from the far side of metal
walls, partitions or work pieces.
||The hot work area should be
cleared of rubbish. Combustible flooring should
be protected with fire resistant sheets to retain
sparks, slag, and pieces of hot metal.
||Openings or cracks on floor or
walls where welding sparks or slag may fall
through should be covered with non-combustible
||Proper equipment should be
employed for hot work operations. Gas cylinders
should be properly secured in the upright
position and fitted with anti-flashback devices.
||The person responsible for the
hot work should carry out a fire watch for at
least 30 minutes at the completion of each
days work to make sure that smouldering
fires have not been started.
||When hot work is carried out in
areas with automatic fire protection systems
(e.g. Computer Room), the automatic discharge
control should be rendered inoperative and the
system be set to Manual Control. The automatic
control should be restored after completion of
the work or when the area is vacated (e.g. during
lunch breaks or at the end of a working day). The
appropriate Fire Orders of the area must also be
Hot Work Permit