The standard covers the vapour transfer valve, used for the transfer of vapour between the tank compartment and the pipework connecting to the vapour collection adaptor. This standard also specifies the performance requirements and the critical dimensions of the vapour transfer valve. It also specifies the tests necessary to verify the compliance of the equipment with this standard. The equipment specified by this standard is suitable for decanting liquid petroleum products and other dangerous substances of Class 3 of ADR which have a vapour pressure not exceeding 110 kPa at 50 °C (including petrol) and which have no sub-classification as toxic or corrosive. With respect to DIN EN 13082:2009-02 the requirement has been added to clause 4 that the vapour transfer valve is to provided that with a means to indicate that it is open. This Amendment A1 to DIN EN 13082:2009-02 has been prepared by WG 7 "Service equipment" (secretariat: BSI, Great Britain)) of CEN/TC 296 "Tanks for transport of dangerous goods", the secretariat of which is held by AFNOR (France). The national mirror committee is Working Committee NA 104-02-07 AA "Ausrüstung für Transporttanks" ("Service equipment for transport tanks") of NATank.