This European Standard specifies the requirements for product discharge and air inlet valves for use on transportable tanks with a minimum working pressure greater than 50 kPa for the transport of dangerous goods by road and rail.NOTE 1The term 'valve' includes ball valves as well as butterfly valves and similar closure devices.It is applicable to metallic equipment for use on tanks with gravity and/or pressure filling and discharge for liquid chemicals and liquefied gases. It includes carbon dioxide while excluding refrigerated liquefied gases.NOTE 2The standard is also applicable to liquefied gases including LPG, however, for a dedicated LPG standard see EN 13175 [3].