DS EN 1759-3:2003
DS EN 1759-3:2003 Flanges And Their Joints - Circular Flanges For Pipes, Valves, Fittings And Accessories, Class Designated - Part 3: Copper Alloy Flanges Defines requirements for circular copper alloy flanges and copper alloy collars combined with loose steel plate flanges in Class designations Class 150 and Class 300 and nominal sizes from DN 10 to DN