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Hazardous
Area Classification (HAC) identifies those areas in the premises where
flammable atmospheres can be found. It also provides an estimate as to how often
these flammable atmospheres may be found. Flammable atmospheres are generally
mixtures of air with flammable gas, Vapour, Dust or aerosol (Mist). For example,
the head space in a tank containing a flammable solvent and the space surrounding
the tank may both be classified as hazardous areas, but their classification would
be different on grounds that flammable atmosphere could be continually present
in one but rarely in the other. SIGNIFICANCE
OF HAC : Originally
HAC was used simply to enable process companies to make a correct choice of electrical
equipment to prevent electrical ignition of the flammable solvent atmosphere by
the equipment. Now, HAC is applied to help in wider risk assessment work and to
help prevent other ignition sources such as electrostatic sparks. It is not only
applied to areas where solvent vapour, gases or mist may be found but also their
flammable dust clouds can occur. HAC, now has become a distinct area of concern
and useful in whole range of industries. HOW
CHILWORTH HELPS : Chilworth
has had substantial experience in helping companies with HAC. Some of the
works usually undertaken are : |
| | Consulting
for new and existing process and premises | |
| Periodic
Re-auditing to maintain continuity of safety assessment |
| | Data
Collection - Determination of gas grouping by measurement, ignition temperature
etc. | |
| Preparation
of full report describing the proposed HAC and the reasons for the classification
etc. | |
Chilworth
Safety & Risk Management P. Ltd. Plot 3, Pocket B-2, Muskaan Complex,
Vasant Kunj, New Delhi-110 070, India. Tel.: 011-26136979 Fax: 011-26135979
E-mail:
info@chilworth.co.in Privacy
Policy | |