ASME B16.3 (2006)

Malleable Iron Threaded Fittings (Classes 150 and 300)

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Annotation and contents

This Standard 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. This standard includes: (a) pressure-temperature ratings (b) size and method of designating openings of reducing fittings (c) marking (d) material (e) dimensions and tolerances (f) threading (g) coatings.