Before revision: The main colours are as follows: Black - Waste media Blue - Fresh water Brown - Fuel Green – Sea water Grey - Non-flammable gases Maroon - Air and sounding pipes Orange - Oils other than fuels Silver - Steam Red - Fire fighting Violet - Acids, alkalis White - Air in ventilation systems Yellow - Flammable gases ISO 20560-1 & -2 Safety information for piping systems International Standard ISO 20560-1 Safety information for the content of piping systems and tanks — Part 1: Piping systems was intended to replace the variety of regulations and standards across countries and regions.
After revision: :2020The main colours are as follows: Black - Waste media Blue - Fresh water Brown - Fuel Green – Sea water Grey - Non-flammable gases Maroon - Air and sounding pipes Orange - Oils other than fuels Silver - Steam Red - Fire fighting Violet - Acids, alkalis White - Air in ventilation systems Yellow - Flammable gases ISO 20560-1 & -2 Safety information for piping systems International Standard ISO 20560-1 Safety information for the content of piping systems and tanks — Part 1: Piping systems was intended to replace the variety of regulations and standards across countries and regions.