Safety Rules for the Québec Film and Video
Compressed air used as a source of energy
1. The head of a department that uses compressed air
must ensure that the lines do not obstruct the site,
particularly if they are under pressure. In all cases:
• their location must be clearly indicated;
• they must be protected from impact, as for exam-
ple, by covering them with a protective mat if they
are on the ground; and
• avoid walking over them or passing over them
with a vehicle or in transporting equipment, partic-
ularly if they are metal pipes.
2. Before disconnecting a compressed air line or repair-
ing it, take the necessary precautions. For example,
bring the pressure in the line to atmospheric pressure
before disconnecting it from the source.
If the line is flexible, it must be equipped with:
• couplings connected by a chain on each side of a
• a self-locking device; or
• a connection equipped with a locking device.
Pipes and connections for the compressed air supply
system must be in good condition, meaning that they
must not be deformed or cracked.
It is forbidden to use compressed air to clean yourself
or someone else. There is a risk of ruptured eardrums,
of getting dust or particles in eyes, or of being con-
taminated (contaminants can penetrate the skin).
When cleaning machines or equipment, the air pres-
sure must be less than 200 kPa (30 psi).
5. When compressed air is used for special effects (as for
example, to produce an explosion in a pipe or a con-
fined area), personal protective equipment must be
made available for all personnel on the site, and the
safety coordinator must ensure that they use it.
6. When an internal combustion motor is used as a
source of energy for a pressurization device, the
exhaust gases must be exhausted from the motor to
the outdoors in order to avoid carbon monoxide
Compressed air as a source of breathing air
7. To eliminate the risks of explosion, make sure that the
concentration of flammable vapours or gase