Historical
ASME B16.4-2011
Gray Iron Threaded Fittings: Classes 125 and 250
This Standard for gray iron threaded fittings, Classes 125 and 250 covers: (a) pressure-temperature ratings (b) size and method of designating openings of reducing fittings (c) marking (d) material (e) dimensions and tolerances (f) threading, and (g) coatings.
Content Provider
American Society of Mechanical Engineers [asme]