This European Standard specifies the requirements on and characteristics of top devices of tank wagons fitted for bottom emptying only and filling through the manhole and used for liquid substances of RID. Safety functions of these devices are subject to RID requirements and not described in this document. This European Standard specifies in particular the important dimensions and arrangements for the connections of such tank wagons. This European Standard applies to new tank wagons built after the 1st January 2010. NOTE To take account of the loading gauge restrictions within Great Britain this European Standard does not apply to tank wagons operating exclusively therein.