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ASME B16.3 2011 Edition, October 10, 2011
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Malleable Iron Threaded Fittings Classes 150 and 300
Page Count:52
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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 38 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

Mandatory Appendix I provides table values in U.S. Customary units.