ASME B16.4 (2007)

Gray Iron Threaded Fittings: (Classes 125 and 250)

Annotation and contents

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