Introduction to Fire Safety Management

Figure 8.22
The use of wall and roof vents together, give 
good natural ventilation
Figure 8.23
Example of a fume cupboard

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Introduction to Fire Safety Management
156
This 
zoning
has assisted, for example, in identifying 
that vehicles such as forklift trucks used for transport-
ing containers of fl ammable substances, which operate 
within classifi ed areas/zones inside and outside storage 
buildings, must be protected to an appropriate standard – 
particularly during storage operations, when the highest 
probability of a release from a container occurs while it 
is being mechanically handled. Therefore an unprotected 
forklift truck may well provide a source of ignition should 
a breach of containment occur.
The management of works that involve the removal, 
replacement or disposal of any part of a plant or system 
that has previously held fl ammable liquids, materials or 
LPG must be planned and undertaken with great care, 
to avoid fi res and explosion.
Many such works will be carried out under the 
Construction, Design and Management Regulations, 
utilising specialist contractors undertaking works as 
part of a permit to work system – PTW (see section on 
construction and maintenance) to ensure the highest 
level of management control.
Various techniques can be employed to ensure that 
fl ammable substances are managed effectively includ-
ing purging or inerting the system prior to undertaking 
operations. Ensuring that residues are removed and that 
any supply system has been isolated from both power 
sources and process materials must also be undertaken 
as part of the systems of work and the PTW.
Disposal arrangements for contaminated fl amma-
ble materials and aerosol cans, empty fl ammable liquid 
containers or gas cylinders must also be considered.