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ICHCA International <strong>Safe</strong>ty Panel Briefing Pamphlet No 30<br />
5.7.4.3 Another means <strong>of</strong> applying heat is by electrical heating coils attached to the<br />
exterior <strong>of</strong> the barrel. There are a number <strong>of</strong> proprietary systems fitted to<br />
tank containers so the operating instructions for the system concerned must<br />
be followed. In principle, at least two thermostats are provided on these<br />
systems, one <strong>of</strong> which registers the temperature <strong>of</strong> the heating coil and one<br />
<strong>of</strong> which registers the temperature <strong>of</strong> the cargo.<br />
5.7.4.4 All means <strong>of</strong> heating will be enclosed by the insulation and cladding.<br />
Note: The operation <strong>of</strong> heating systems <strong>of</strong> tank containers, including<br />
connection and disconnection, repairs or maintenance, should only<br />
be undertaken by trained personnel.<br />
5.7.5 Earthing Connections<br />
5.7.5.1 It is recommended that vehicles used to transport tank containers laden with<br />
substances which could generate static electricity provide good electrical<br />
continuity from the tank shell to the vehicle and then to ground.<br />
5.7.5.2 All tank containers approved for the transport <strong>of</strong> liquids meeting the<br />
flashpoint criteria <strong>of</strong> Class 3 (flammable liquids with a flashpoint temperature<br />
<strong>of</strong> 60 o C or below including any subsidiary danger <strong>of</strong> this kind and<br />
substances transported hot, at or above their flashpoint temperature), i.e.<br />
cargoes that are likely to be susceptible to ignition from static electricity,<br />
must be capable <strong>of</strong> being electrically earthed. This also applies to tank<br />
containers approved for the transport <strong>of</strong> flammable gases, whether<br />
pressurised, liquefied or deeply refrigerated liquefied flammable gases.<br />
5.7.5.3 Further, during loading, transport, cleaning and similar operations, measures<br />
should be taken to prevent electrostatic discharges. Picture 43 shows the<br />
earthing connection that should be connected to a suitable ground point<br />
during all loading and discharge operations.<br />
Page 22 ©ICHCA International Limited
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