C110-77: American National Standard for Ductile-Iron and Gray-Iron Fittings, 3 In. Through 48 In., for Water and Other Liquids (PDF)

The standard covers 3-48 in. gray iron and/or ductile iron fittings to be used with gray iron or ductile iron pipe for water and other liquids. Specifications for fittings with mechanical joints or flange joints are listed in the tables. This standard may also be used for fittings with push-on joints or such joints as may be agreed upon at time of purchase. For 3-24 in. size, ductile iron mechanical-joint fittings are rated at 350 psi working pressure; ductile iron flange-joint fittings are rated for 250 psi working pressure; gray iron fittings having all types of joints covered by this standard are rated for 150 or 250 psi working pressure, as shown in tables. For 30-48 in. size, fittings of all types of joints covered by standard are shown in tables as gray iron and/or ductile iron rated for working pressures of 150 or 250 psi. Included are sections on the following: definitions, general requirements, inspection and certification by manufacturer, inspection by purchaser, delivery and acceptance, tolerances or permitted variations, coatings and linings, markings on fittings, acceptance tests, chemical limitations for gray iron fittings, additional tests by purchaser, defective specimens and retests, and special requirements for flanged fittings. Also provided is an index to the tables. This nongovernment document was adopted and approved for use by the Department of Defense (DoD) on August 7, 1981.