DS EN 14525:2004 Ductile Iron Wide Tolerance Couplings And Flange Adaptors For Use With Pipes Of Different Materials: Ductile Iron, Grey Iron, Steel, Pvc-U, Pe, Fibre-Cement Defines the requirements and associated test methods applicable to wide tolerance ductile iron couplings and wide tolerance flange adaptors intended for use with pipe components made from a number of