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Carriage, Handling and Storage of Dangerous Goods along

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Technical <strong>and</strong> Management (continued)<br />

• Zone 0:<br />

• Zone 1:<br />

• Zone 2:<br />

PORTS AND TERMINALS 27<br />

Area in which an explosive gas-air mixture is continuously present for long periods.<br />

Area in which an explosive gas-air mixture is likely to occur for short periods in normal<br />

operation. Combustible or conductive dusts are present.<br />

Area in which an explosive gas-air mixture is not likely to occur <strong>and</strong> will only exist for a<br />

very short time if it occurs due to abnormal conditions (typically as a result <strong>of</strong> a process<br />

fault condition).<br />

Terminals should ensure that any electrical equipment is provided in accordance with a site-specific<br />

area electrical drawing, which shows hazardous zones at the cargo transfer areas in plan <strong>and</strong> elevation.<br />

Terminals should identify the zones <strong>and</strong> establish the type <strong>of</strong> equipment that is to be installed within<br />

each zone. National legislation, international st<strong>and</strong>ards <strong>and</strong> company-specific guidelines, where<br />

available, are all to be complied with.<br />

All portable electrical equipment for operation in hazardous areas, including lamps <strong>and</strong> communications<br />

equipment, must be <strong>of</strong> an approved type for use in flammable atmospheres. Before use, portable<br />

equipment should be examined for possible defects such as damaged insulation <strong>and</strong> a check<br />

made that cables are securely attached <strong>and</strong> that they will remain so throughout the work. Special<br />

care should be taken to prevent any mechanical damage to flexible cables or w<strong>and</strong>ering leads. Any<br />

other electrical or electronic equipment <strong>of</strong> a non-approved type, whether mains or battery powered,<br />

must not be active, switched on or used within hazardous areas. This includes, but should not be<br />

limited to, radios, calculators, photographic equipment, laptop computers, h<strong>and</strong>held computers <strong>and</strong><br />

any other portable equipment that is electrically powered but not approved for operation in hazardous<br />

areas.<br />

A planned maintenance system should be implemented addressing the continued integrity <strong>of</strong> the<br />

equipment installed, <strong>and</strong> ensure it remains able to meet zone requirements.<br />

A permit to work system should be developed so all electrical maintenance is carried out under the<br />

control <strong>of</strong> this system.<br />

Institutional <strong>and</strong> Capacity Building<br />

Personnel carrying out maintenance on equipment within hazardous zones should be trained <strong>and</strong><br />

certified as competent to carry out the work.

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