AS/NZS 60079.12:2000

1 - AS/NZS 60079.12:2000 ELECTRICAL APPARATUS FOR EXPLOSIVE GAS ATMOSPHERES - CLASSIFICATION OF MIXTURES OF GASES OR VAPOURS WITH...
4 - PREFACE
4 - CONTENTS
5 - 1 Scope
5 - 2 Classification of gases and vapours
5 - 2.1 Classification according to the maximum experimental safe gaps (MESG)
6 - 2.2 Classification according to the minimum igniting currents (MIC)
6 - 2.3 Classification according to MESG and MIC
6 - 2.4 Classification according to a similarity of chemical structure
7 - 2.5 Classification of mixtures of gases
7 - 3 Tables of gases
7 - Table 1 - Gases or vapours for which Group IIA apparatus is required
13 - Table 2 - Gases or vapours for which Group IIB apparatus is required
14 - Table 3 - Gases or vapours for which group IIC apparatus is required

Gives guidance on the selection fo the appropriate group or sub-group of electrical apparatus, protected by flameproof enclosure or designed to be intrinsically safe, according to the gas or vapour in which it is intended to be used. Provides a classification of most used gases and vapours and gives guidance on tests to classify additional gases or vapours not listed in this Standard. This Standard is identical with and has been reproduced from IEC/TR 60079-12:1978.

This report provides guidance on the selection of the appropriate group or sub-group of electrical apparatus, protected by flameproof enclosure or designed to be intrinsically safe, according to the gas or vapour in which it is intended to be used.This report provides the basis for the classification of the most used gases and vapours. Guidance is given on the tests to be carried out to classify any additional gases or vapours not listed in this report.

First published as AS/NZS 60079.12:2000.