An American National Standard. — The American Society of Mechanical Engineers (ASME). Revision of ASME B16.9-2012. — October 29, 2018. — 41 p.
This Standard covers overall dimensions, tolerances, ratings, testing, and markings for factory-made wrought buttwelding fittings in sizes NPS 1∕2 through NPS 48 (DN 15 through DN 1200).