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ANSI/ASME B16.4-2006

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) sizes and method of designating openings of reducing fittings (c) marking (d) material (e) dimensions and tolerances (f) threading (g) coatings. Mandatory Appendix I provides table values in U.S. Customary units.

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