Update on New Refrigerants Designations and Safety Classifications

April 2020
The purpose of this fact sheet is to provide an update on ASHRAE standards for refrigerants and to introduce the new refrigerants that have been awarded an «R» number over the last few years and introduced into the international market.

ASHRAE Standard 34, Designation and Safety Classification of Refrigerants, establishes a simple means of referring to common refrigerants rather than by their chemical name, formula, or trade name. ASHRAE assigns numbers and safety classification to the refrigerants based on toxicity and flammability data submitted by the refrigerant’s producer.

For pure compounds, the numbers are based on chemical formula. For blends, numbers are assigned sequentially based on the completion of a satisfactory review of data provided by the refrigerant’s producer. Information is available in the current edition, ANSI/ASHRAE Standard 34-2019

Source: https://www.unenvironment.org/ozonaction/resources/factsheet/update-new-refrigerants-designations-and-safety-classifications



ASHRAE規格34(冷媒の指定と安全分類)は、一般的な冷媒を化学名、化学式、あるいは商品名によってではなく指定する簡潔な方法を定めている。 ASHRAEは、冷媒の製造元から提出された毒性と可燃性のデータに基づき、冷媒に番号と安全性の分類を割り当てる。純粋な化合物(純物質)の場合、数値は化学式に基づいている。 混合物の場合、冷媒の製造元から提供されたデータの十分な評価が完了したのちに番号が順番に割り当てられる。 情報は現行のANSI / ASHRAE Standard 34-2019で入手できる。