This European standard is applicable to fill hole covers and specifies the performance requirements, critical dimensions and tests necessary to verify the compliance of the equipment to this standard. The equipment specified in this standard is suitable for use with liquid petroleum products and other dangerous substances of class 3 (flammable liquids) of ADR - European Agreement concerning the International Carriage of Dangerous Goods By Road - which have a vapour pressure at 50°C not greater than 110kPa.