PDF Publication Title:
Text from PDF Page: 037
2 Safety characteristics According to various international and national safety standards, refrigerants may be allocated one of six safety classifications according to its toxicity and flammability. This classification consists of two alpha-numeric characters (e.g. A2); the capital letter corresponds to toxicity and the digit to flammability. The toxicity classification is determined by a refrigerants’ TLV-TWA, such that it may be lower toxicity “A” or higher toxicity “B”. There are no refrigerants that are non-toxic. The flammability classification may be no flame propagation “1”, lower flammability “2” or higher flammability “3”. These classifications are shown in this table: Refrigerant are classified in terms of two general safety criteria: toxicity and flammability. Toxicity: Both acute (short-term) and chronic (long-term) toxicity are considered as they affect human safety during handling and servicing with refrigerants, and for occupants in refrigerated or air conditioned spaces. The acute-toxicity exposure limit (ATEL) is the maximum recommended refrigerant concentration intended to reduce the risks of acute toxicity hazards to humans in the event of a refrigerant release. For chronic toxicity, the threshold limit value- time weighted average (TLV-TWA) is the time -weighted average concentration for a normal 8-hour workday and a 40-hour workweek, to which nearly all workers may be repeatedly exposed, day after day, without adverse effect. Flammability: Refrigerant flammability can affect the safety of people and property mainly during handling and servicing activities, and it influences the design of equipment. The flammability of a refrigerant is judged according to the lower flammability limit (LFL), which is the lowest concentration of the refrigerant mixed in air, required for it to be able to be ignited. Flammability is also considered according to the refrigerants’ heat of combustion (HOC), which is the amount of energy released when it burns. Safety Classifications according to ISO 817, EN 378 and ASHRAE 34 standards CHAPITRE 2 PAGE 06 LOWER TOXITY HIGHER TOXITY A3 B3 HIGHER FLAMMABILITY A2 B2 LOWER FLAMMABILITY A1 B1 NO - FLAME PROPAGATION 37 RefrigerantsPDF Image | Manual for Refrigeration Servicing Technicians
PDF Search Title:
Manual for Refrigeration Servicing TechniciansOriginal File Name Searched:
Refrigeration_Servicing.pdfDIY PDF Search: Google It | Yahoo | Bing
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
IT XR Project Redstone NFT Available for Sale: NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Be part of the future with this NFT. Can be bought and sold but only one design NFT exists. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Turbine IT XR Project Redstone Design: NFT for sale... NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Includes all rights to this turbine design, including license for Fluid Handling Block I and II for the turbine assembly and housing. The NFT includes the blueprints (cad/cam), revenue streams, and all future development of the IT XR Project Redstone... More Info
Infinity Turbine ROT Radial Outflow Turbine 24 Design and Worldwide Rights: NFT for sale... NFT for the ROT 24 energy turbine. Be part of the future with this NFT. This design can be bought and sold but only one design NFT exists. You may manufacture the unit, or get the revenues from its sale from Infinity Turbine. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Supercritical CO2 10 Liter Extractor Design and Worldwide Rights: The Infinity Supercritical 10L CO2 extractor is for botanical oil extraction, which is rich in terpenes and can produce shelf ready full spectrum oil. With over 5 years of development, this industry leader mature extractor machine has been sold since 2015 and is part of many profitable businesses. The process can also be used for electrowinning, e-waste recycling, and lithium battery recycling, gold mining electronic wastes, precious metals. CO2 can also be used in a reverse fuel cell with nafion to make a gas-to-liquids fuel, such as methanol, ethanol and butanol or ethylene. Supercritical CO2 has also been used for treating nafion to make it more effective catalyst. This NFT is for the purchase of worldwide rights which includes the design. More Info
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
Infinity Turbine Products: Special for this month, any plans are $10,000 for complete Cad/Cam blueprints. License is for one build. Try before you buy a production license. May pay by Bitcoin or other Crypto. Products Page... More Info
CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com (Standard Web Page)