BS EN 60079-29-2:2015 – TC:2020 Edition
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Tracked Changes. Explosive atmospheres – Gas detectors. Selection, installation, use and maintenance of detectors for flammable gases and oxygen
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 246 |
IEC 60079-29-2:2015 is available as /2 which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition. IEC 60079-29-2:2015 gives guidance on, and recommended practice for, the selection, installation, safe use and maintenance of electrically operated Group II equipment intended for use in industrial and commercial safety applications and Group I equipment in underground coal mines for the detection and measurement of flammable gases complying with the requirements of IEC 60079-29-1 or IEC 60079-29-4. This second edition cancels and replaces the first edition published in 2007. This edition constitutes a technical revision. Please refer to the Foreword of the document for a listing of the changes from the previous edition. Keywords: gas detectors, flammable gases, vapours
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 132 | CONTENTS |
| 138 | FOREWORD |
| 141 | INTRODUCTION |
| 142 | Tables Table 1 – Typical Tasks and Most Relevant Causes |
| 143 | 1 Scope |
| 144 | 2 Normative references 3 Terms and definitions 3.1 Gas properties and other physics |
| 146 | 3.2 Types of equipment |
| 148 | 3.3 Sensors and detectors |
| 149 | 3.4 Supply of gas to instruments 3.5 Signals and alarms |
| 150 | 3.6 Times, checks and equipment behaviour |
| 151 | 3.7 Terms exclusive to open path equipment |
| 153 | 4 Basic information on the properties, behaviour, gases and vapours, and specific applications of gas detection 4.1 Detecting gases and vapours 4.1.1 General |
| 154 | 4.1.2 Safety when monitoring for flammable gases where personnel could be present |
| 155 | 4.2 Some common properties of gases and vapours |
| 156 | 4.3 The differences between detecting gases and vapours 4.3.1 General 4.3.2 Detection of gases |
| 158 | 4.3.3 Detection of vapours |
| 161 | 4.4 Oxygen deficiency 4.4.1 General 4.4.2 Chemical reaction of oxygen, with solid products 4.4.3 Chemical reaction of oxygen, with gaseous products |
| 162 | 4.4.4 Dilution of the air by displacement by some other gas or vapour 4.5 Specific applications of gas detection 4.5.1 Gas detection as means of reducing risk of explosion |
| 165 | 4.5.2 Gas free work permit |
| 166 | 4.5.3 Monitoring of air inlets 4.6 Specific considerations for open path detection |
| 167 | 5 Measuring principles 5.1 General Figures Figure 1 – Integral concentration over the path length Figure 2 – Average concentration over the path length |
| 168 | Table 2 – Overview of gas detection equipment with different measuring principles |
| 169 | 5.2 Catalytic sensors 5.2.1 General 5.2.2 Common applications 5.2.3 Limitations |
| 170 | 5.2.4 Interferences 5.2.5 Poisoning |
| 171 | 5.3 Thermal conductivity sensors 5.3.1 General 5.3.2 Common applications 5.3.3 Limitations 5.3.4 Interferences 5.3.5 Poisoning 5.4 Infrared sensors 5.4.1 General |
| 172 | 5.4.2 Common applications 5.4.3 Limitations 5.4.4 Interferences 5.4.5 Poisoning |
| 173 | 5.5 Semiconductor sensors 5.5.1 General 5.5.2 Common applications 5.5.3 Limitations 5.5.4 Interferences 5.5.5 Poisoning |
| 174 | 5.6 Electrochemical sensors 5.6.1 General 5.6.2 Common applications 5.6.3 Limitations 5.6.4 Interferences 5.6.5 Poisoning |
| 175 | 5.7 Flame ionization detectors (FID) 5.7.1 General 5.7.2 Common applications 5.7.3 Limitations 5.7.4 Interferences 5.7.5 Poisoning 5.8 Flame temperature analysers (FTA) 5.8.1 General 5.8.2 Common applications |
| 176 | 5.8.3 Limitations 5.8.4 Interferences 5.8.5 Poisoning 5.9 Photo ionisation detector (PID) 5.9.1 General 5.9.2 Common applications 5.9.3 Limitations 5.9.4 Interferences |
| 177 | 5.9.5 Poisoning 5.10 Paramagnetic oxygen detector 5.10.1 General 5.10.2 Common applications 5.10.3 Limitations 5.10.4 Interference 5.10.5 Poisoning 6 Selection of equipment 6.1 General |
| 178 | 6.2 Selection criteria 6.2.1 General criteria |
| 179 | 6.2.2 Gases to be detected by the equipment |
| 180 | 6.2.3 Application of fixed equipment |
| 184 | 6.2.4 Application of transportable and portable equipment |
| 185 | 6.3 Miscellaneous factors affecting selection of equipment 6.3.1 Electromagnetic immunity 6.3.2 Intended Zone(s) of use 7 Behaviour of gas releases 7.1 Nature of a release 7.1.1 General 7.1.2 Release rate of gas or vapour |
| 186 | 7.1.3 Flammable limits 7.1.4 Ventilation 7.1.5 Relative density of the released gas or vapour |
| 187 | 7.1.6 Temperature and/or pressure 7.1.7 Other parameters to be considered 7.1.8 Outdoor sites and open structures 7.2 Buildings and enclosures 7.2.1 General 7.2.2 Unventilated buildings and enclosures |
| 188 | 7.2.3 Ventilated buildings and enclosures |
| 189 | 7.3 Environmental considerations 8 Design and installation of fixed gas detection systems 8.1 General 8.2 Basic considerations for the installation of fixed systems 8.2.1 General |
| 190 | 8.2.2 Point detection equipment and remote sensors 8.2.3 Systems consisting of sampling equipment |
| 191 | 8.2.4 Open path (line of sight) equipment 8.3 Location of detection points 8.3.1 General 8.3.2 General site considerations |
| 192 | 8.3.3 Environmental conditions |
| 195 | 8.4 Access for calibration and maintenance 8.5 Additional considerations for sample lines |
| 196 | 8.6 Additional considerations for open path equipment 8.7 Summary of considerations for the location of measuring points and open paths |
| 197 | 8.8 Installation of measuring point and open path equipment 8.9 Integrity and safety of fixed systems 8.9.1 General |
| 198 | 8.9.2 Redundancy in fixed systems 8.9.3 Protection against loss of main power supply 8.10 Timing of installation during construction operations 8.11 Commissioning 8.11.1 Inspection |
| 199 | 8.11.2 Initial gas calibration 8.11.3 Adjustment of alarm set points |
| 200 | 8.12 Operating instructions, plans and records 9 Use of portable and transportable flammable gas detection equipment 9.1 General |
| 201 | 9.2 Initial and periodic check procedures for portable and transportable instrumentation 9.2.1 General |
| 202 | 9.2.2 Inspection and functional checks |
| 203 | 9.2.3 Routine tests and recalibration 9.2.4 Maintenance and recalibration |
| 204 | 9.3 Guidance on the use of portable and transportable equipment 9.3.1 Electrical safety in hazardous atmospheres 9.3.2 Safety of personnel |
| 205 | 9.3.3 Spot tests and sampling 9.3.4 Sampling above liquids 9.3.5 Avoidance of condensation 9.3.6 Poisoning of sensors |
| 206 | 9.3.7 Changes of temperature 9.3.8 Accidental damage 9.3.9 Minimalist operation, the “Read and run” concept 10 Training of operational personnel 10.1 General |
| 207 | 10.2 General training – Basic limitations and safety 10.3 Operator training |
| 208 | 10.4 Maintenance training 11 Maintenance, routine procedures and general administrative control 11.1 General |
| 210 | 11.2 Operational checks 11.2.1 General 11.2.2 Fixed systems |
| 211 | 11.2.3 Portable and transportable gas detection equipment 11.3 Maintenance 11.3.1 General 11.3.2 Fixed equipment |
| 212 | 11.3.3 Portable and transportable gas detection equipment 11.3.4 Off-site maintenance, general 11.3.5 Maintenance procedures 11.4 Sensors 11.4.1 General |
| 213 | 11.4.2 Flame arrestor 11.5 Flow systems 11.5.1 General 11.5.2 Inspection 11.5.3 Filters, traps and flame arrestors 11.5.4 Flow system and sample chamber 11.5.5 Flow connections 11.5.6 Moving parts 11.5.7 Automatic sample-draw systems 11.5.8 Loss-of-flow signals 11.6 Readout devices 11.6.1 General |
| 214 | 11.6.2 Other readouts 11.7 Alarms 11.8 Calibration 11.8.1 Calibration kits and test equipment |
| 215 | 11.8.2 Calibration procedure |
| 217 | Annexes Annex A (normative) Measuring principles A.1 General |
| 218 | Table A.1 – Overview of gas detection equipment with different measuring principles |
| 219 | A.2 Catalytic sensors A.2.1 General |
| 220 | A.2.2 Common applications A.2.3 Limitations A.2.4 Interferences |
| 221 | A.2.5 Poisoning |
| 222 | A.3 Thermal conductivity sensors A.3.1 General A.3.2 Common applications |
| 223 | A.3.3 Limitations A.3.4 Interferences A.3.5 Poisoning A.4 Infrared sensors A.4.1 General |
| 225 | A.4.2 Common applications |
| 226 | A.4.3 Limitations A.4.4 Interferences |
| 227 | A.4.5 Poisoning A.5 Semi-conductor sensors A.5.1 General A.5.2 Common applications A.5.3 Limitations |
| 228 | A.5.4 Interferences A.5.5 Poisoning A.6 Electrochemical sensors A.6.1 General |
| 229 | A.6.2 Common applications A.6.3 Limitations |
| 230 | A.6.4 Interferences A.6.5 Poisoning |
| 231 | A.7 Flame ionization detectors (FID) A.7.1 General |
| 232 | A.7.2 Common applications A.7.3 Limitations A.7.4 Interferences A.7.5 Poisoning |
| 233 | A.8 Flame temperature analysers (FTA) A.8.1 General A.8.2 Common applications A.8.3 Limitations A.8.4 Interferences A.8.5 Poisoning |
| 234 | A.9 Photo ionisation detector (PID) A.9.1 General A.9.2 Common applications |
| 235 | A.9.3 Limitations A.9.4 Interferences A.9.5 Poisoning A.10 Paramagnetic oxygen detector A.10.1 General |
| 236 | A.10.2 Common applications A.10.3 Limitations A.10.4 Interference A.10.5 Poisoning |
| 237 | Annex B (informative) Environmental parameters Table B.1 – Environmental parameters |
| 238 | Annex C (informative) Typical environmental and application check-listfor flammable gas detectors (for both Group I and Group II equipment) |
| 240 | Annex D (informative) Typical instrument maintenance record for flammable gas detectors |
| 242 | Annex E (informative) Atmospheric visibility |
| 243 | Bibliography |
