IS/IEC 60079 : Part 29 : Sec 3 : 2014 Explosive Atmospheres - Part 29 Gas Detectors - Section 3 Guidance on Functional Safety of Fixed Gas Detection Systems
NATIONAL FOREWORD
This Indian Standard (Part 29/Sec 3) which is identical to IEC 60079-29-3 : 2014 'Explosive atmospheres - Part 29-3: Gas detectors - Guidance on functional safety of fixed gas detection systems' issued by the International Electrotechnical Commission (IEC) was adopted by the Bureau of Indian Standards on the recommendation of the Electrical Apparatus for Explosive Atmosphere Sectional Committee and approval of the Electrotechnical Division Council.
This Indian Standard gives guidance for the design and implementation of a fixed gas detection system, including associated and/or peripheral gas detection equipment, for the detection of flammable gases/vapours and oxygen when used in a safety-related application in accordance with IS/IEC 61508 and IS/IEC 61511. This Indian Standard also applies to the detection of toxic gases.
The IEC standard has been approved as suitable for publication as an Indian Standard without deviations. Certain terminologies and conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following:
a) Wherever the words 'International Standard' appear referring to this standard, they should be read as 'Indian Standard'; and
b) Comma (,) has been used as a decimal marker, while in Indian Standards the current practice is to use a point (.) as the decimal marker.