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BS EN 17893:2024 Thermal road vehicles. Temperature-controlled systems using flammable refrigerants for transport of goods. Requirements and risk analysis process, 2024
- undefined
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Symbols and abbreviated terms
- 5 Risk assessment [Go to Page]
- 5.1 General [Go to Page]
- 5.1.1 General requirements
- 5.1.2 Safety principles
- 5.1.3 Safety concept
- 5.2 Characteristics of Flammable refrigerants
- 5.3 Significant hazards
- 5.4 Protection against hazards [Go to Page]
- 5.4.1 Protection against fire, flame propagation and explosion hazards
- 5.4.2 Protection against excessive internal system pressure
- 5.5 Operational mode risk assessment [Go to Page]
- 5.5.1 General
- 5.5.2 Operational modes
- 5.5.3 Evaluation of leak rate and frequencies for characterization
- 5.5.4 Control volume
- 5.5.5 Risk assessment for flammable refrigerants
- 5.6 Tolerable risk [Go to Page]
- 5.6.1 General
- 5.6.2 Risk reduction
- 5.6.3 Tolerable risk criteria
- 5.7 Auditing and effectiveness check of safety concepts
- 6 Requirements for design and construction of the TRU [Go to Page]
- 6.1 General
- 6.2 Components and piping of refrigerating systems with flammable refrigerant [Go to Page]
- 6.2.1 General
- 6.2.2 External fire relief device
- 6.3 Assembly of TRU on van, truck and trailer
- 6.4 Interior of the compartment volume [Go to Page]
- 6.4.1 General
- 6.4.2 Inside compartment heat exchanger [Go to Page]
- 6.4.2.1 General
- 6.4.2.2 Heat exchanger zoning concept
- 6.4.2.3 Indirect heat exchanger concept
- 6.4.2.4 Heat exchanger separation mechanism
- 6.4.3 Ventilation inside the compartment volume
- 6.4.4 Refrigerant detectors
- 6.4.5 Evaluation of surface temperatures
- 6.4.6 Electrical components
- 6.5 Outside electrical components (cabinet)
- 6.6 Refrigerant charge
- 6.7 Alarm system [Go to Page]
- 6.7.1 General
- 6.7.2 Alarm system power
- 6.8 Testing [Go to Page]
- 6.8.1 General
- 6.8.2 Testing of safety concept and protective devices
- 6.8.3 Testing the air tightness of the compartment volume to determine the dilution of release
- 6.8.4 Corrosion testing
- 6.8.5 Vibration type-test
- 6.8.6 Shock and impact type test
- 6.8.7 Final system test before putting into operation
- 6.9 Marking and documentation [Go to Page]
- 6.9.1 General
- 6.9.2 Marking
- 6.9.3 Manuals and documentation [Go to Page]
- 6.9.3.1 General
- 6.9.3.2 Operation and service manual
- 7 Requirements for the TRU manufacturer ensuring safe service, maintenance, repair [Go to Page]
- 7.1 General
- 7.2 Providing education and training
- 7.3 Instruction for maintenance and repair
- 7.4 Providing safety instructions
- 7.5 Providing a self-check mechanism
- 8 Safe operation at different operating sites [Go to Page]
- 8.1 General
- 8.2 Operating sites
- 8.3 Significant hazards at operating sites
- 8.4 Ventilating condition at operating sites [Go to Page]
- 8.4.1 General
- 8.4.2 Requirements for operation in open air
- 8.4.3 Requirements for operation in well-ventilated areas
- 8.4.4 Requirements for operation in non-well-ventilated areas
- 8.4.5 Operation in non-ventilated areas
- 8.5 Requirements for opening of door(s) and for loading and unloading of goods
- 8.6 Electrical installations at operating sites
- 8.7 Operator instruction for handling of alarms
- 8.8 Accidents [Go to Page]
- 8.8.1 General
- 8.8.2 Measures for accidents prevention
- 8.8.3 Measures after accidents
- 8.9 Operating instructions, manuals, guidelines at operating sites
- 9 Servicing recommendations and requirements at operating sites [Go to Page]
- 9.1 General
- 9.2 Operating sites with service activities [Go to Page]
- 9.2.1 General
- 9.2.2 General requirements
- 9.2.3 Instruction of personnel
- 9.2.4 General failure prevention
- 9.3 Assembly of TRU at the vehicle and inside the compartment volume
- 9.4 Repair and maintenance on the vehicle or the body structure
- 9.5 Repair and maintenance on the TRU including refrigerating system repair [Go to Page]
- 9.5.1 General
- 9.5.2 Instruction of personnel
- 9.5.3 Work area requirements
- 9.5.4 Inspection
- 9.5.5 System failure indication
- 9.5.6 Actions and procedure for refrigerating system repair [Go to Page]
- 9.5.6.1 General
- 9.5.6.2 Removal, evacuation of refrigerant
- 9.5.6.3 Draining the oil from a refrigerating system
- 9.5.6.4 Procedures for changing of components
- 9.5.6.5 Hot works
- 9.5.6.6 Repair of protective device(s)
- 9.5.6.7 Leak detection
- 9.5.6.8 Charging procedures
- 9.5.7 Tools and equipment
- 9.5.8 Testing after repair
- 9.5.9 Failure prevention for maintenance and refrigerating system repair
- 9.5.10 Documentation
- 9.6 Handling, recovery, reuse and disposal of refrigerant
- 10 Decommissioning of the TRU
- Annex A (informative)Specifications of control volumes for TRV
- Annex B (informative)Description of mechanisms to reduce risk [Go to Page]
- B.1 General
- B.2 Heat exchanger zoning concept
- B.3 Indirect heat exchanger
- B.4 Heat exchanger separation mechanism, shut-off devices
- B.5 Ventilation mechanism [Go to Page]
- B.5.1 General
- B.5.2 Outside ventilation mechanism
- B.5.3 Inside ventilation mechanism
- B.6 Refrigerant detection
- B.7 Alarm system [Go to Page]
- B.7.1 General
- B.7.2 Types of alarm
- B.7.3 Visible and audible refrigerant leak alarm
- B.7.4 Actions by the alarm system
- Annex C (normative)Information on leak types and leak mass flow
- Annex D (normative)Useful equations for the calculation of environment ventilation [Go to Page]
- D.1 General
- D.2 Dilution of a flammable substance release with air
- D.3 Additional examples [Go to Page]
- D.3.1 Small volume in open air situation
- D.3.2 A Non-ventilated enclosure
- Annex E (normative)Tracer gas measurement for determination of air exchange rate [Go to Page]
- E.1 General
- E.2 Tracer gas measurement with CO2
- E.3 Required air exchange rate for dilution of refrigerant releases inside the compartment volume
- Annex F (informative)Typical ignition sources for risk assessment of TRU
- Annex G (informative)Example process for risk evaluation [Go to Page]