ASME B16.4 (2011)

Gray Iron Threaded Fittings: Classes 125 and 250

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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.

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