IEC 60079-10-Electrical apparatus for explosive gas by IEC TC/SC 31J

By IEC TC/SC 31J

Is anxious with the type of detrimental parts the place flammable fuel or vapour dangers might come up, so as to allow the right kind choice and install of kit to be used in such dangerous parts.

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Additional resources for IEC 60079-10-Electrical apparatus for explosive gas atmospheres-Part 10-Classification of hazardous areas

Example text

Guidance on availability is given in annex B. NOTE Combining the concepts of degree of ventilation and level of availability results in a quantitative method for the evaluation of zone type (see annex B). 1 Généralités Il est recommandé que le travail de classement des emplacements dangereux soit effectué de telle manière que les différentes étapes qui conduisent au classement final fassent l'objet d'une documentation soigneuse. Il convient de donner la référence de toutes les informations pertinentes utilisées.

L'évaluation du degré de ventilation requiert d'abord que l'on connaisse le taux maximal de dégagement de gaz ou de vapeur à la source de dégagement au moyen soit d'essais confirmés, de calculs raisonnables ou d'hypothèses sérieuses. Copyright International Electrotechnical Commission Provided by IHS under license with IEC No reproduction or networking permitted without license from IHS Licensee=Underwriters Laboratories Inc /5909636100 Not for Resale, 07/29/2005 14:44:40 MDT --`,,`,`,```,,,```,,,`,,,,,`,,,-`-`,,`,,`,`,,`--- On reconnaît les trois degrés de ventilation suivants.

Des conseils sur la disponibilité de la ventilation sont donnés à l'annexe B. NOTE La combinaison des concepts de degré de ventilation et de niveau de disponibilité de celle-ci aboutit à une méthode quantitative pour l'évaluation du type de la zone (voir annexe B). 1 Généralités 60079-10  IEC:2002 – 31 – c) Source of release: leakage of a gas mixture The gas release rate is affected by the following parameters: − pressure within the equipment which contains the gas; − geometry of the source of release; − concentration of flammable gas in the released mixture.

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