Specifies requirements for round seamless copper alloy tubes, designated as either brass which is intended primarily for sanitary plumbing and stormwater drainage services, or copper nickel which is intended primarily for water services. The ranges of nominal sizes are DN 10 to DN 150 inclusive for Type B brass, and DN 32 to DN 150 inclusive for Type D brass and DN 10 to DN 80 inclusive for Type B copper nickel. Details of dimensions and tolerances, chemical composition, temper and form of material, testing and marking are specified. The appendices propose purchasing guidelines, safe working pressure, testing pressure, and hydrostatic test.