{"id":424842,"date":"2024-10-20T06:53:41","date_gmt":"2024-10-20T06:53:41","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-60079-29-22015-2\/"},"modified":"2024-10-26T12:58:40","modified_gmt":"2024-10-26T12:58:40","slug":"bs-en-60079-29-22015-2","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-60079-29-22015-2\/","title":{"rendered":"BS EN 60079-29-2:2015"},"content":{"rendered":"

This part of IEC 60079\u201129<\/span> <\/span> 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\u201129\u20111<\/span> <\/span> or IEC 60079\u201129\u20114<\/span> <\/span>.<\/p>\n

This standard is applicable for oxygen measurement for the purpose of inertisation where explosion protection is provided by the exclusion of oxygen instead of measuring the flammable gases or vapours present. A similar application is measuring oxygen when inertising a goaf (mined out) area in an underground coal mine.<\/p>\n

This standard is a compilation of practical knowledge to assist the user, and applies to equipment, instruments and systems that indicate the presence of a flammable or potentially explosive mixture of gas or vapour with air by using an electrical signal from a gas sensor to produce a meter reading, to activate a visual or audible pre-set alarm or other device, or any combination of these.<\/p>\n

Such equipment may be used as a means of reducing the risk whenever there is the possibility of a risk to life or property specifically due to the accumulation of a flammable gas-air mixture, by providing such warnings. It may also be used to initiate specific safety precautions (e.g. plant shutdown, evacuation, fire extinguishing procedures).<\/p>\n

This standard is applicable to fixed installations and transportable equipment. Similarly it is applicable to the safe use of portable equipment. Since much modern equipment of this type also includes oxygen deficiency detection and\/or specific toxic gas sensors, some additional guidance is given for these topics.<\/p>\n

For the purposes of this standard, except where specifically stated otherwise, flammable gases include flammable vapours.<\/p>\n

Mists are not covered by this standard due to measurement techniques currently used.<\/p>\n

This standard applies to Group II equipment (i.e. equipment intended for use in industrial and commercial safety applications, involving areas classified in accordance with IEC 60079\u201110\u20111<\/span> <\/span>) and Group I equipment.<\/p>\n

For the purposes of this standard, equipment includes<\/p>\n

    \n
  1. \n

    fixed equipment including equipment mounted on a vehicle;<\/p>\n<\/li>\n

  2. \n

    transportable equipment; and<\/p>\n<\/li>\n

  3. \n

    portable equipment.<\/p>\n<\/li>\n<\/ol>\n

    This standard is not intended to cover, but may provide useful information, for the following:<\/p>\n

      \n
    1. \n

      equipment intended only for the detection of non-flammable toxic gases;<\/p>\n<\/li>\n

    2. \n

      equipment of laboratory or scientific type intended only for analysis or measurement purposes;<\/p>\n<\/li>\n

    3. \n

      equipment intended only for process control applications;<\/p>\n<\/li>\n

    4. \n

      equipment intended for applications in explosives processing and manufacture;<\/p>\n<\/li>\n

    5. \n

      equipment intended for the detection of a explosive atmosphere resulting from dust or mist in air.<\/p>\n<\/li>\n<\/ol>\n

      PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
      PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
      6<\/td>\nCONTENTS <\/td>\n<\/tr>\n
      12<\/td>\nFOREWORD <\/td>\n<\/tr>\n
      15<\/td>\nINTRODUCTION <\/td>\n<\/tr>\n
      16<\/td>\nTables
      Table 1 \u2013 Typical Tasks and Most Relevant Causes <\/td>\n<\/tr>\n
      17<\/td>\n1 Scope <\/td>\n<\/tr>\n
      18<\/td>\n2 Normative references
      3 Terms and definitions
      3.1 Gas properties and other physics <\/td>\n<\/tr>\n
      20<\/td>\n3.2 Types of equipment <\/td>\n<\/tr>\n
      22<\/td>\n3.3 Sensors and detectors <\/td>\n<\/tr>\n
      23<\/td>\n3.4 Supply of gas to instruments
      3.5 Signals and alarms <\/td>\n<\/tr>\n
      24<\/td>\n3.6 Times, checks and equipment behaviour <\/td>\n<\/tr>\n
      25<\/td>\n3.7 Terms exclusive to open path equipment <\/td>\n<\/tr>\n
      27<\/td>\n4 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 <\/td>\n<\/tr>\n
      28<\/td>\n4.1.2 Safety when monitoring for flammable gases where personnel could be present <\/td>\n<\/tr>\n
      29<\/td>\n4.2 Some common properties of gases and vapours <\/td>\n<\/tr>\n
      30<\/td>\n4.3 The differences between detecting gases and vapours
      4.3.1 General
      4.3.2 Detection of gases <\/td>\n<\/tr>\n
      32<\/td>\n4.3.3 Detection of vapours <\/td>\n<\/tr>\n
      35<\/td>\n4.4 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 <\/td>\n<\/tr>\n
      36<\/td>\n4.4.4 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 <\/td>\n<\/tr>\n
      39<\/td>\n4.5.2 Gas free work permit <\/td>\n<\/tr>\n
      40<\/td>\n4.5.3 Monitoring of air inlets
      4.6 Specific considerations for open path detection <\/td>\n<\/tr>\n
      41<\/td>\n5 Measuring principles
      5.1 General
      Figures
      Figure 1 \u2013 Integral concentration over the path length
      Figure 2 \u2013 Average concentration over the path length <\/td>\n<\/tr>\n
      42<\/td>\nTable 2 \u2013 Overview of gas detection equipment with different measuring principles <\/td>\n<\/tr>\n
      43<\/td>\n5.2 Catalytic sensors
      5.2.1 General
      5.2.2 Common applications
      5.2.3 Limitations <\/td>\n<\/tr>\n
      44<\/td>\n5.2.4 Interferences
      5.2.5 Poisoning <\/td>\n<\/tr>\n
      45<\/td>\n5.3 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 <\/td>\n<\/tr>\n
      46<\/td>\n5.4.2 Common applications
      5.4.3 Limitations
      5.4.4 Interferences
      5.4.5 Poisoning <\/td>\n<\/tr>\n
      47<\/td>\n5.5 Semiconductor sensors
      5.5.1 General
      5.5.2 Common applications
      5.5.3 Limitations
      5.5.4 Interferences
      5.5.5 Poisoning <\/td>\n<\/tr>\n
      48<\/td>\n5.6 Electrochemical sensors
      5.6.1 General
      5.6.2 Common applications
      5.6.3 Limitations
      5.6.4 Interferences
      5.6.5 Poisoning <\/td>\n<\/tr>\n
      49<\/td>\n5.7 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 <\/td>\n<\/tr>\n
      50<\/td>\n5.8.3 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 <\/td>\n<\/tr>\n
      51<\/td>\n5.9.5 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 <\/td>\n<\/tr>\n
      52<\/td>\n6.2 Selection criteria
      6.2.1 General criteria <\/td>\n<\/tr>\n
      53<\/td>\n6.2.2 Gases to be detected by the equipment <\/td>\n<\/tr>\n
      54<\/td>\n6.2.3 Application of fixed equipment <\/td>\n<\/tr>\n
      58<\/td>\n6.2.4 Application of transportable and portable equipment <\/td>\n<\/tr>\n
      59<\/td>\n6.3 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 <\/td>\n<\/tr>\n
      60<\/td>\n7.1.3 Flammable limits
      7.1.4 Ventilation
      7.1.5 Relative density of the released gas or vapour <\/td>\n<\/tr>\n
      61<\/td>\n7.1.6 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 <\/td>\n<\/tr>\n
      62<\/td>\n7.2.3 Ventilated buildings and enclosures <\/td>\n<\/tr>\n
      63<\/td>\n7.3 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 <\/td>\n<\/tr>\n
      64<\/td>\n8.2.2 Point detection equipment and remote sensors
      8.2.3 Systems consisting of sampling equipment <\/td>\n<\/tr>\n
      65<\/td>\n8.2.4 Open path (line of sight) equipment
      8.3 Location of detection points
      8.3.1 General
      8.3.2 General site considerations <\/td>\n<\/tr>\n
      66<\/td>\n8.3.3 Environmental conditions <\/td>\n<\/tr>\n
      69<\/td>\n8.4 Access for calibration and maintenance
      8.5 Additional considerations for sample lines <\/td>\n<\/tr>\n
      70<\/td>\n8.6 Additional considerations for open path equipment
      8.7 Summary of considerations for the location of measuring points and open paths <\/td>\n<\/tr>\n
      71<\/td>\n8.8 Installation of measuring point and open path equipment
      8.9 Integrity and safety of fixed systems
      8.9.1 General <\/td>\n<\/tr>\n
      72<\/td>\n8.9.2 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 <\/td>\n<\/tr>\n
      73<\/td>\n8.11.2 Initial gas calibration
      8.11.3 Adjustment of alarm set points <\/td>\n<\/tr>\n
      74<\/td>\n8.12 Operating instructions, plans and records
      9 Use of portable and transportable flammable gas detection equipment
      9.1 General <\/td>\n<\/tr>\n
      75<\/td>\n9.2 Initial and periodic check procedures for portable and transportable instrumentation
      9.2.1 General <\/td>\n<\/tr>\n
      76<\/td>\n9.2.2 Inspection and functional checks <\/td>\n<\/tr>\n
      77<\/td>\n9.2.3 Routine tests and recalibration
      9.2.4 Maintenance and recalibration <\/td>\n<\/tr>\n
      78<\/td>\n9.3 Guidance on the use of portable and transportable equipment
      9.3.1 Electrical safety in hazardous atmospheres
      9.3.2 Safety of personnel <\/td>\n<\/tr>\n
      79<\/td>\n9.3.3 Spot tests and sampling
      9.3.4 Sampling above liquids
      9.3.5 Avoidance of condensation
      9.3.6 Poisoning of sensors <\/td>\n<\/tr>\n
      80<\/td>\n9.3.7 Changes of temperature
      9.3.8 Accidental damage
      9.3.9 Minimalist operation, the \u201cRead and run\u201d concept
      10 Training of operational personnel
      10.1 General <\/td>\n<\/tr>\n
      81<\/td>\n10.2 General training \u2013 Basic limitations and safety
      10.3 Operator training <\/td>\n<\/tr>\n
      82<\/td>\n10.4 Maintenance training
      11 Maintenance, routine procedures and general administrative control
      11.1 General <\/td>\n<\/tr>\n
      84<\/td>\n11.2 Operational checks
      11.2.1 General
      11.2.2 Fixed systems <\/td>\n<\/tr>\n
      85<\/td>\n11.2.3 Portable and transportable gas detection equipment
      11.3 Maintenance
      11.3.1 General
      11.3.2 Fixed equipment <\/td>\n<\/tr>\n
      86<\/td>\n11.3.3 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 <\/td>\n<\/tr>\n
      87<\/td>\n11.4.2 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 <\/td>\n<\/tr>\n
      88<\/td>\n11.6.2 Other readouts
      11.7 Alarms
      11.8 Calibration
      11.8.1 Calibration kits and test equipment <\/td>\n<\/tr>\n
      89<\/td>\n11.8.2 Calibration procedure <\/td>\n<\/tr>\n
      91<\/td>\nAnnexes
      Annex A (normative) Measuring principles
      A.1 General <\/td>\n<\/tr>\n
      92<\/td>\nTable A.1 \u2013 Overview of gas detection equipment with different measuring principles <\/td>\n<\/tr>\n
      93<\/td>\nA.2 Catalytic sensors
      A.2.1 General <\/td>\n<\/tr>\n
      94<\/td>\nA.2.2 Common applications
      A.2.3 Limitations
      A.2.4 Interferences <\/td>\n<\/tr>\n
      95<\/td>\nA.2.5 Poisoning <\/td>\n<\/tr>\n
      96<\/td>\nA.3 Thermal conductivity sensors
      A.3.1 General
      A.3.2 Common applications <\/td>\n<\/tr>\n
      97<\/td>\nA.3.3 Limitations
      A.3.4 Interferences
      A.3.5 Poisoning
      A.4 Infrared sensors
      A.4.1 General <\/td>\n<\/tr>\n
      99<\/td>\nA.4.2 Common applications <\/td>\n<\/tr>\n
      100<\/td>\nA.4.3 Limitations
      A.4.4 Interferences <\/td>\n<\/tr>\n
      101<\/td>\nA.4.5 Poisoning
      A.5 Semi-conductor sensors
      A.5.1 General
      A.5.2 Common applications
      A.5.3 Limitations <\/td>\n<\/tr>\n
      102<\/td>\nA.5.4 Interferences
      A.5.5 Poisoning
      A.6 Electrochemical sensors
      A.6.1 General <\/td>\n<\/tr>\n
      103<\/td>\nA.6.2 Common applications
      A.6.3 Limitations <\/td>\n<\/tr>\n
      104<\/td>\nA.6.4 Interferences
      A.6.5 Poisoning <\/td>\n<\/tr>\n
      105<\/td>\nA.7 Flame ionization detectors (FID)
      A.7.1 General <\/td>\n<\/tr>\n
      106<\/td>\nA.7.2 Common applications
      A.7.3 Limitations
      A.7.4 Interferences
      A.7.5 Poisoning <\/td>\n<\/tr>\n
      107<\/td>\nA.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 <\/td>\n<\/tr>\n
      108<\/td>\nA.9 Photo ionisation detector (PID)
      A.9.1 General
      A.9.2 Common applications <\/td>\n<\/tr>\n
      109<\/td>\nA.9.3 Limitations
      A.9.4 Interferences
      A.9.5 Poisoning
      A.10 Paramagnetic oxygen detector
      A.10.1 General <\/td>\n<\/tr>\n
      110<\/td>\nA.10.2 Common applications
      A.10.3 Limitations
      A.10.4 Interference
      A.10.5 Poisoning <\/td>\n<\/tr>\n
      111<\/td>\nAnnex B (informative) Environmental parameters
      Table B.1 \u2013 Environmental parameters <\/td>\n<\/tr>\n
      112<\/td>\nAnnex C (informative) Typical environmental and application check-listfor flammable gas detectors (for both Group I and Group II equipment) <\/td>\n<\/tr>\n
      114<\/td>\nAnnex D (informative) Typical instrument maintenance record for flammable gas detectors <\/td>\n<\/tr>\n
      116<\/td>\nAnnex E (informative) Atmospheric visibility <\/td>\n<\/tr>\n
      117<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

      Explosive atmospheres – Gas detectors. Selection, installation, use and maintenance of detectors for flammable gases and oxygen<\/b><\/p>\n\n\n\n\n
      Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
      BSI<\/b><\/a><\/td>\n2015<\/td>\n120<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":424851,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[551,2641],"product_tag":[],"class_list":{"0":"post-424842","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-29-260-20","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/424842","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/424851"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=424842"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=424842"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=424842"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}