Ductile iron wide tolerance couplings and flange adaptors for use with pipes of different materials: ductile iron, grey iron, steel, PVC-U, PE, fibre-cement1 Scope This document specifies 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 pipe materials (ductile iron, grey iron, PE, PVC U, steel, fibre cement), for providing a leak tight seal over a wide range of pipe external diameters : to convey water (e. g. potable water) ; with or without pressure ; to be

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