This Standard for threaded malleable iron fittings Classes 150, and 300 provides requirements for the following: (a) pressure-temperature ratings (b) size and method of designating openings of reducing fittings (c) marking (d) materials (e) dimensions and tolerances (f) threading (g) coatings
ASME B16.3-1998 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