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Japan reclassifies CO2, opening the market

CO2 has been re-classified under Japan’s High Pressure Gas Safety Act, opening the door for larger capacity CO2 systems to enter the Japanese market.

On 14 July, the High Pressure Safety Institute of Japan (KHK) announced that, staring on 25 July, CO2 would be re-classified under Japan’s High Pressure Gas Safety Act.



The announcement, which has long been in discussion over the past several years, signals a monumental shift for CO2 regulation in Japan, opening the door for significantly wider adoption of larger CO2 systems in commercial and industrial applications.

Japan’s High Pressure Gas Safety Act
The KHK is a Japanese standards body that develops and issues technical standards to ensure the safe use of high-pressure gases.

The group administers the High Pressure Gas Safety Act, which is in place to regulate the production, consumption and handling of high-pressure gases in Japan.

Until now, this law has restricted the use of CO2 in large refrigeration systems, subjecting manufacturers to heavy administrative burdens.

However, CO2 will now be re-classified under the law – moving from the strictest level of Group 3 to the least restricted level of Group 1.

What this means is that several administrative restrictions, such as government notification or permission, are no longer required for any manufacturer of CO2 equipment with a daily refrigeration capacity under 20t (previously under 3t).

According to the KHK regulations, daily refrigeration capacity is defined as the processing capacity of refrigeration equipment per day (24 hours).

Specifically, a piece of equipment which can remove the amount of heat required to convert 1t of water at 0°C into 1t of ice at 0°C in 24 hours, is said to have a refrigeration capacity of 1t per day.

CO2 systems to flourish in Japan
What is expected now is that the new safety standards should make it easier for manufacturers to introduce larger CO2 refrigeration systems to the market, creating more options for end users.

So far in Japan, we have seen the uptake of mass produced CO2 condensing units (up to 20HP).

The updated regulations should trigger the expansion of the line-up of this system type (up to 40HP) in the market, as well as increased uptake of CO2 booster systems in industrial refrigeration applications such as food processing and small capacity cold stores.



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