use of flammable refrigerants as alternatives for traditional refrigerants. In addition, the workshop also included breakout group discussions Importers and manufacturers of flammable refrigerant gasesManufacturers, importers and suppliers of refrigeration equipment used in workplacesRefrigeration technicians, engineers and businesses that install or maintain workplace refrigeration systemsInstallers of complex refrigeration systems may hold relevant tertiary qualificationsFlammable refrigerant gases are used in refrigeration or air-conditioning systemsThe recovery, reclamation or disposal of refrigerant gases
Ensure a concentration of RFG does not reach above 20 of its lower flammable limit (LFL).
The general concepts of refrigerants and the expected changes in the form of fire risk with the introduction of flammable refrigerants were discussed. For example, when deciding if flammable refrigerants can replace non-flammable refrigerants.A qualified or registered engineer can also complete an assessment to decide if a system can be converted to use a flammable refrigerant.Refrigerant odourants, such as mercaptan, can provide a warning of refrigerant leaks by emitting an unpleasant smell when released.Limit the quantity of flammable refrigerant injected into refrigeration or air-conditioning systems within a confined area, ducted into a building or an enclosed space. How to manage the risks associated with gases containing class 2.1 flammable refrigerants in refrigeration and air conditioning systems. EPA SNAP Rules on Flammable Refrigerants. Click here to view more industries and topics
A person with training and experience in refrigerant gases should decide if refrigerant gases are compatible. These gas detectors should be interlocked with a floor-level mechanical extraction system and have an alarm that activates when there is a gas leak.The detection and extraction system should be at floor level because most flammable refrigerants are heavier than air.
This can be done by:Refrigerant gases must be compatible with the refrigerant system. The Following is a list of more industries and topics related to this content For example, when deciding if flammable refrigerants can replace non-flammable refrigerants. Use the flammable refrigerant charge table below to decide when to put these additional risk controls in Additional risk control measures could include using detectors such as:Use gas detectors inside the space being air-conditioned. The online Flammable Refrigerants Safety Guide (FRSG) has been produced by the Australian Institute of Refrigeration, Air Conditioning and Heating (AIRAH). People conducting a business or undertaking (PCBU), employers and people with management or control of workplaces By James Burns. When there is a leak, the composition of these refrigerants can change because they have different boiling points and can create unpredictable hazard properties.Mark and label service access points, refrigeration systems and machinery room entries containing flammable refrigerants.
Workplace incidents involving flammable refrigerant gas have caused death, serious injury and property damage.Small gas leaks can cause catastrophic events.
R-134a is the only refrigerant that should be used when recharging a late model automotive A/C system. Occupiers of premises should ensure personnel adhere to the safety requirements set out in the MSDS/SDS.Businesses employing refrigeration technicians should develop safe work procedures for working with flammable refrigerants.
Mark and label with warning signs stating that these systems contain class 2.1 flammable refrigerants.Clearly mark flammable refrigerants in gas cylinders with one of the class 2.1 flammable gas labels.Managing the location of equipment containing flammable refrigerants can help reduce the risks associated with flammable refrigerants. Resources The following are examples of safe work procedures businesses should include:People conducting a business or undertaking (PCBU), including employersAS ISO 817:2016 Refrigerants - Designation and safety classificationAS 5149.1:2016 Refrigerating systems and heat pumps - Safety and environmental requirementsAS 60079.10.1:2009 Explosive atmospheres - Classification of Areas - Explosive gas atmospheresAS 60079.14:2009 Explosive atmospheres - Electrical installations design, selection and erection Treat cylinders carefully and do not roll along the ground, drop or throw them when loading.Combustion products of some refrigerants and mixtures are toxic.
For example, halogenated refrigerants can release two dangerous chemicals hydrogen fluoride or carbonyl dichloride (phosgene) in a fire.Some refrigerants are a blend of gases called zeotropic mixtures.
Leaking compressed gases can quickly fill a room or confined space, with the accumulated gas remaining within its explosive range.Flammable gases that are denser than air are dangerous because they can travel considerable distances to ignition sources.Cylinders dropped, struck, impacted or ignited can cause gases to disperse or rupture and explode.
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