This standard covers 3-in. through 64-in. (76-mm through 1,600-mm) ductile-ironcompact fittings to be used with ductile-iron pipe or pipe made of other materials with similar outside diameters for conveying water. Minimum working pressures by size range are given. Fittings are adequate for the rated working pressure plus a surge allowance of 100 psi or a surge allowance of half the rated working pressure, whichever is less. Fittings with mechanical joints are listed in this standard for the 3-in. through 48-in. sizes. The standard also may be used for fittings of these sizes with push-on joints or other joints as agreed on at the time of purchase.