This document covers malleable iron threaded fittings, Classes 150 and 300. It also contains provisions for using steel for caps and couplings in Class 150 for NPS 3.8 and smaller.
ASME B16.3-2011 history
2022ASME B16.3-2021 Malleable Iron Threaded Fittings Classes 150 and 300
2016ASME B16.3-2016 Malleable Iron Threaded Fittings Classes 150 and 300
2011ASME B16.3-2011 Malleable Iron Threaded Fittings: Classes 150 and 300
2006ASME B16.3-2006 Malleable Iron Threaded Fittings: Classes 150 and 300
1998ASME B16.3-1998 Malleable iron threaded fittings; Classes 150 and 300