EN 14432:2023

This document specifies the requirements for valves useable on tanks with a minimum working pressure greater than 50 kPa for the transport of dangerous goods by road and rail for the following functions:Tanks for transport of liquid products:- secondary closure of bottom discharge lines;- primary closure on top of the tank (liquid, air, other connections);- aeration valve on top of the tank;- and other valves as specified in Annex F of EN 14564:2019 according to the scope of this document.Tanks for gases:- secondary closure of bottom discharge lines;- secondary closure on top of the tank for poisonous gases: liquid phase and gas phase;- and other valves as specified in Annex F of EN 14564:2019.This includes the following types of closures:- valves (e.g. spindle operated valves, plug and ball valves, butterfly valves and gate valves);- dry disconnect couplings.Primary closures of the gas phase at the foot of a tank for liquefied gas are covered by the requirements of foot valves in EN 14433.NOTE The standard is also applicable to liquefied gases including LPG, however, for a dedicated LPG standard see EN 13175 [3]