This European Standard is applicable to top devices of tank wagons used for liquid substances of RID carried in the liquid state and able to be top filled and emptied. This European Standard specifies the type of equipment which is fitted on the top of such tank wagons and the important dimensions for their connections.
BS EN 12561-4:2003 history
2011BS EN 12561-4:2011 Railway applications. Tank wagons. Devices for top filling and emptying of liquid products
2003BS EN 12561-4:2002 Railway applications - Tank wagons - Top devices for top emptying and filling of liquid products