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eLibrary >
19/30399410 DC BS EN ISO/IEC 80079-41. Explosive atmospheres - Part 41. Reciprocating internal combustion engines >
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19/30399410 DC BS EN ISO/IEC 80079-41. Explosive atmospheres - Part 41. Reciprocating internal combustion engines, 2019
- 31M_144e_CD.pdf [Go to Page]
- 1 Scope
- 2 Normative references
- 3 Definitions
- 4 Ignition hazards
- 5 Safety requirements and/or measures [Go to Page]
- 5.1 For all explosion protection levels (EPLs) [Go to Page]
- 5.1.1 General
- 5.1.2 Ignition hazard assessment
- 5.1.3 Joints [Go to Page]
- 5.1.3.1 Joint types
- 5.1.3.2 Closed joints
- 5.1.3.3 Open joints
- 5.1.4 Electrical systems [Go to Page]
- 5.1.4.1 General requirements [Go to Page]
- 5.1.4.1.1 General
- 5.1.4.1.2 Protection against damage
- 5.1.4.1.3 Ingress protection
- 5.1.4.2 Cables [Go to Page]
- 5.1.4.2.1 Protection of cables and cable harnesses
- 5.1.4.2.2 Electrical system wiring
- 5.1.4.3 Service temperature
- 5.1.5 Static electricity and bonding requirements [Go to Page]
- 5.1.5.1 Equipotential bonding
- 5.1.5.2 Circuit resistance
- 5.1.5.3 Non-metallic materials [Go to Page]
- 5.1.5.3.1 EPL Mb, EPL Gc and EPL Gb
- 5.1.5.3.2 EPL Dc and EPL Db
- 5.1.5.4 Transmission belts
- 5.1.6 Safety and automation systems [Go to Page]
- 5.1.6.1 Safety devices or safety systems
- 5.1.6.2 Safety function [Go to Page]
- 5.1.6.2.1 Function of safety systems
- 5.1.6.2.2 Determination of the control parameters
- 5.1.6.3 Requirements for safety devices [Go to Page]
- 5.1.6.3.1 General
- 5.1.6.3.2 "Simple" safety devices:
- 5.1.6.3.3 "Complex" safety devices
- 5.1.6.4 Monitoring and alarm
- 5.1.6.5 Engine shutdown systems [Go to Page]
- 5.1.6.5.1 General
- 5.1.6.5.2 Shutdown (normal stop)
- 5.1.6.5.3 Emergency shutdown
- 5.1.6.5.4 Gas detection systems
- 5.1.7 Flame arresters [Go to Page]
- 5.1.7.1 General
- 5.1.7.2 Types, construction and materials for flame arresters used in internal combustion engines [Go to Page]
- 5.1.7.2.1 Types
- 5.1.7.2.2 Construction and materials
- 5.1.7.3 Installation / positioning
- 5.1.7.4 Design of flame arresters [Go to Page]
- 5.1.7.4.1 General
- 5.1.7.4.2 Flame arresters for Intake system
- 5.1.7.4.3 Flame arresters for exhaust system
- 5.1.8 Spark arresters [Go to Page]
- 5.1.8.1 General requirements
- 5.1.8.2 Spark arresters – Types
- 5.1.8.3 Spark arresters – Installation
- 5.1.8.4 Exemptions [Go to Page]
- 5.1.8.4.1 General
- 5.1.8.4.2 Turbocharged Engines
- 5.1.8.4.3 Liquid seal flame arresters
- 5.1.8.4.4 PM Filters
- 5.1.9 Engine configuration
- 5.1.10 Fuel intake
- 5.2 EPL Mb [Go to Page]
- 5.2.1 Maximum temperature
- 5.2.2 Gas path
- 5.2.3 Air intake system
- 5.2.4 Exhaust system
- 5.2.5 Other devices [Go to Page]
- 5.2.5.1 Cold start devices
- 5.2.5.2 Air preheating devices
- 5.2.5.3 Valves and venting devices
- 5.2.5.4 Inlet air pressure boosting devices
- 5.2.5.5 Fuel systems
- 5.2.6 Mechanically generated sparks [Go to Page]
- 5.2.6.1 Metallic materials
- 5.2.6.2 Fans and other rotating components
- 5.2.6.3 Motor starting systems (e. g. electrical, air, hydraulic and spring) engaging the flywheel ring gear
- 5.2.7 . Compressed air systems
- 5.3 EPL Gb and EPL Gc [Go to Page]
- 5.3.1 Maximum temperature
- 5.3.2 Gas path
- 5.3.3 Air intake system [Go to Page]
- 5.3.3.1 EPL Gb Air ducts from a non-hazardous area
- 5.3.3.2 EPL Gc Air duct from the non-hazardous area
- 5.3.3.3 Air duct from the hazardous area
- 5.3.4 Exhaust system [Go to Page]
- 5.3.4.1 Exhaust system duct into a non-hazardous area
- 5.3.4.2 Exhaust system duct into a hazardous area
- 5.3.5 Other devices [Go to Page]
- 5.3.5.1 Cold start devices
- 5.3.5.2 Air preheating devices
- 5.3.5.3 Valves and venting devices
- 5.3.5.4 Inlet air pressure boosting devices
- 5.3.5.5 Crankcase
- 5.3.6 Mechanically generated sparks [Go to Page]
- 5.3.6.1 Metallic materials
- 5.3.6.2 Fans and other rotating components
- 5.3.6.3 Starter Motors (e. g. electrical, air, hydraulic and spring) engaging the Flywheel toothed ring
- 5.3.7 Compressed air systems
- 5.4 EPL Db and EPL Dc [Go to Page]
- 5.4.1 Maximum temperature [Go to Page]
- 5.4.1.1 General
- 5.4.1.2 Maximum surface and exhaust gas temperature determined without a dust layer
- 5.4.1.3 Maximum surface and exhaust gas temperature with respect to dust layers
- 5.4.2 Air intake system [Go to Page]
- 5.4.2.1 Air ducts from a non hazardous area
- 5.4.2.2 Air duct from the hazardous area
- 5.4.3 Exhaust system [Go to Page]
- 5.4.3.1 Exhaust system duct into a non-hazardous area
- 5.4.3.2 Exhaust system duct into a hazardous area
- 5.4.4 Cold start devices
- 5.4.5 Mechanically generated sparks [Go to Page]
- 5.4.5.1 Metallic materials
- 5.4.5.2 Fans and other rotating components
- 5.4.5.3 Motor starting systems (e. g. electrical, air, hydraulic and spring) engaging the flywheel ring gear
- 5.4.6 Compressed air systems
- 6 EPL Gc spark ignited, gaseous fuel engine [Go to Page]
- 6.1 General [Go to Page]
- 6.1.1 Differences between gaseous fuel ignition engines and compression ignition engines
- 6.1.2 Fuel System
- 6.2 Ignition system [Go to Page]
- 6.2.1 General
- 6.2.2 Component requirements [Go to Page]
- 6.2.2.1 General
- 7 Test setup for Verification of the safety requirements and/or measures [Go to Page]
- 7.1 General
- 7.2 Documentation
- 7.3 Engine operation
- 7.4 Measuring instruments
- 7.5 Temperature measurement [Go to Page]
- 7.5.1 Purpose of the test
- 7.5.2 Test procedure [Go to Page]
- 7.5.2.1 General
- 7.5.2.2 Measurement points and conditions
- 7.5.3 Acceptance criteria
- 7.5.4 (Type) Test report / protocol
- 7.6 Determination of the maximum explosion pressure (Gc, Gb and Mb) [Go to Page]
- 7.6.1 General
- 7.6.2 Test procedure [Go to Page]
- 7.6.2.1 Test gases
- 7.6.2.2 Test apparatus
- 7.6.2.3 Test process
- 7.6.2.4 Acceptance criteria
- 7.6.3 (Type) Test report
- 7.7 Over pressure test (Gc, Gb and Mb) [Go to Page]
- 7.7.1 General
- 7.7.2 Test procedure static test [Go to Page]
- 7.7.2.1 Testing the full System [Go to Page]
- 7.7.2.1.1 Test apparatus
- 7.7.2.1.2 Test procedure hydrostatic test
- 7.7.2.1.3 Acceptance criteria
- 7.7.2.1.4 (Type) Test report
- 7.7.2.2 Testing in sections [Go to Page]
- 7.7.2.2.1 General
- 7.7.2.2.2 Test apparatus and test procedure
- 7.7.2.2.3 Acceptance criteria
- 7.7.2.2.4 (Type) Test report
- 7.7.3 Test procedure alternative dynamic test [Go to Page]
- 7.7.3.1 General
- 7.7.3.2 Testing the full system [Go to Page]
- 7.7.3.2.1 Test apparatus
- 7.7.3.2.2 Test procedure
- 7.7.3.2.3 Acceptance criteria
- 7.7.3.2.4 (Type) Test report
- 7.7.3.3 Testing in sections [Go to Page]
- 7.7.3.3.1 General
- 7.7.3.3.2 Test apparatus and test procedure
- 7.7.3.3.3 Acceptance criteria
- 7.7.3.3.4 (Type) Test report
- 7.8 Non-transmission testing [Go to Page]
- 7.8.1 General
- 7.8.2 Test set-up [Go to Page]
- 7.8.2.1 Test apparatus
- 7.8.2.2 Temperature
- 7.8.2.3 Sensors / Measuring equipment inlet system
- 7.8.2.4 Sensors / measuring equipment exhaust system
- 7.8.2.5 Test mixtures
- 7.8.2.6 Ignition
- 7.8.3 Non-transmission test procedure intake system [Go to Page]
- 7.8.3.1 Required / Minimum input information [Go to Page]
- 7.8.3.1.1 Test conditions
- 7.8.3.1.2 Intake side of turbocharged/overcharged engines
- 7.8.3.1.3 Intake side of naturally aspirated engines
- 7.8.3.2 Test procedure
- 7.8.3.3 Acceptance criteria
- 7.8.3.4 Test report
- 7.8.4 Non-transmission test procedure exhaust side [Go to Page]
- 7.8.4.1 Required / Minimum input information
- 7.8.4.2 Test procedure
- 7.8.4.3 Acceptance criteria
- 7.8.4.4 Test result
- 7.8.4.5 Test report
- 7.9 Testing Crankcase (Gb and Mb)
- 7.10 Spark arrester tests [Go to Page]
- 7.10.1 Dry type – spark arrester tests
- 7.10.2 Liquid type – spark arrester tests
- 7.11 Static electricity / Non-metallic material
- 7.12 Verification engine control, alarms and shutdown
- 7.13 Leak test for ducts
- 8 Instructions [Go to Page]
- 8.1 Accompanying documents [Go to Page]
- 8.1.1 Group I Mining
- 8.1.2 Group II Flammable gas and vapours
- 8.1.3 Group III Combustible dust
- 8.2 Inspection check list [Go to Page]
- 8.2.1 Group I Mining
- 8.2.2 Group II Flammable gas and vapours
- 8.2.3 Group III Combustible dust
- 9 Marking [Go to Page]
- 9.1.1 General
- 9.1.2 EPL Mb
- 9.1.3 EPL Gb and EPL Gc
- 9.1.4 EPL Db and EPL Dc
- Annex A (informative) Engine conditions and ignition sources – Group I equipment [Go to Page]
- A.1 Engine conditions [Go to Page]
- A.1.1 Normal operating conditions
- A.1.2 Expected malfunctions
- A.1.3 Rare malfunctions
- A.2 Ignition sources [Go to Page]
- A.2.1 Hot surfaces
- A.2.2 Flame and hot gases
- A.2.3 Sparks
- A.2.4 Adiabatic compression
- Annex B (informative) Engine conditions and ignition sources – Group II and Group III equipment – Flammable gas, vapour and combustible dust atmospheres [Go to Page]
- B.1 General
- B.2 Engine conditions [Go to Page]
- B.2.1 Normal operating conditions
- B.2.2 Reasonably foreseeable malfunctions
- B.2.3 Rare malfunctions
- B.3 Ignition sources [Go to Page]
- B.3.1 Hot surfaces
- B.3.2 Flame and hot gases
- B.3.3 Sparks
- B.3.4 Adiabatic compression
- Annex C (informative) Ignition hazard assessment for reciprocating internal combustion engines [Go to Page]
- C.1 General requirements
- C.2 Procedure of ignition hazard assessment [Go to Page]
- C.2.1.1 Formal Ignition hazard identification and assessment
- C.2.1.2 Assessment with malfunctions
- C.2.1.3 Basic information necessary for the ignition hazard assessment
- C.3 Ignition hazard assessment report
- Annex D (informative) Identification of Ignition Hazards
- Annex E (informative) Test reports [Go to Page]
- The following tables show examples for test reports.
- Table E.1 Temperature type test report - Relevant data for protocolling
- Annex F (normative) Test set up schematics
- Annex G (informative) Charging test for non-conductive materials (IEC 60079-0) [Go to Page]
- G.1 Test equipment
- G.2 Test sample
- G.3 Test procedure
- Annex H (informative) Spark ignition systems [Go to Page]
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