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T1 Refrigerant Cylinder Colours - What Has Changed? - OzonAction Factsheet
T2 Colores de cilindros para refrigerantes - ¿QUÉ CAMBIÓ?
A1 United Nations Environment Programme, 
K1 refrigeration
YR 2020
FD 2020
LK https://wedocs.unep.org/handle/20.500.11822/32200
UL https://wedocs.unep.org/handle/20.500.11822/32200
NO One of the ways in which refrigeration cylinders are quickly identified is by cylinder colour. Although there was never a truly globally adopted international standard, the guideline from the Air-Conditioning, Heating, and Refrigeration Institute (AHRI) although not required by law was used by the vast majority of industry and chemical producers around the world. This guideline was intended to support manufacturers, engineers, installers, contractors and users, and was also widely used by customs and enforcement officers and National Ozone Officers (NOOs) to help identify the contents of cylinders.
DS UN Environment Document Repository
RD Sep 17, 2026