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The following is mentionned in Solas Chap II-2 Regulation 10.10.4 as amendedby resolution MSC.338(91).

a minimum of two two-way portable radiotelephone apparatus for each fire party for fire-fighter's communication, and that these Fire-fighter’s radios shall be of an explosion-proof type or intrinsically safe, to be carried on board.

What is the difference between explosion-proof type or intrinsically safe.

10 Jan '19, 11:40

Jan. 10, 2019, 11:40 a.m.
OPSSHIP22's gravatar image



Answer:

Intrinsic Safety is an approach to the design of equipment in the way to reduce the available energy to a level where it is too low to cause an ignition. This done by lowering operational voltages and currents of the equipment so sparks are prevented and temperatures kept low.

The explosion proof protection method assumes that the surrounding explosive atmosphere can enter an enclosure intended to protect electrical equipment and that there will be internal explosions during the life of the protected equipment.

In order to be certified as explosion or flame proof, the enclosure must be strong enough not to fracture or distort under the internal pressures generated in order to contain explosions and prevent propagation.

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10 Jan '19, 22:58

Jan. 10, 2019, 10:58 p.m.
cheng's gravatar image


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