By Torben Jespen

This publication information how safeguard (i.e. the absence of unacceptable hazards) is ensured in components the place in all probability explosive atmospheres (ATEX) can come up. The publication additionally bargains readers crucial info on how one can agree to the most recent (April 2016) ecu laws whilst the presence of ATEX can't be avoided.

By featuring normal suggestions on concerns bobbing up out of the ecu ATEX laws – specifically on region class, explosion probability review, apparatus categorization, Ex-marking and comparable technical/chemical features – the ebook offers gear brands, liable employers, and others with the fundamental wisdom they should be capable to comprehend the various – and sometimes complex – features of ATEX and to enforce the mandatory safeguard precautions. As such, it represents a invaluable source for all these serious about retaining excessive degrees of defense in ATEX environments.

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ATEX—Explosive Atmospheres: Risk Assessment, Control and Compliance

This publication info how protection (i. e. the absence of unacceptable dangers) is ensured in parts the place in all probability explosive atmospheres (ATEX) can come up. The publication additionally bargains readers crucial details on how one can conform to the latest (April 2016) european laws while the presence of ATEX can't be kept away from.

Extra resources for ATEX—Explosive Atmospheres: Risk Assessment, Control and Compliance

Example text

Tig is an important parameter for the explosion risk assessment and equipment selection—see also Chap. 5, but does not enter zone classification deliberations. As the temperature equipment classification code for ATEX equipment in Group IIG is also used as a characterizing parameter attached to the respective gas/vapours, this code should be mentioned here. 3. 3 Temperature class codes Class code Max surface temp. 2 Gas/Vapour Explosion Risk Parameters 25 than 300 °C, which on the equipment in the Ex-marking is indicated by the temperature class code “T2”.

4 Inerting When the explosion risks cannot be eliminated by material (fuel) substitutions or adjustment of process condition to ensure substances being outside the flammable range, inerting comes into focus. The partial or complete substitution of the air (oxygen) by an inert gas is a very effective method in explosion prevention. Every flammable material (gas, vapor, mist or dust) has associated with it a parameter known as the Limiting Oxygen Concentration (LOC) valid for the inert gas in question.

G. T3 or T4) may also be selected. For equipment having a max surface temperature greater than 450 °C, only the max temperature value shall be specified in the marking. Equipment of Group II G, designed and marked for use in a particular gas, does not need temperature specifications. Dust equipment (Group II D, category 1, 2 and 3) Max surface temperature of equipment for use in dust atmospheres is generally not indicated by the use of temperature classes, but by stating the actual max temperature value.

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