ASME B16.42 (2011)
Ductile Iron Pipe Flanges and Flanged Fittings: Classes 150 and 300
Annotation and contents
This Standard covers minimum requirements for Class 150 and 300 cast ductile iron pipe flanges and flanged fittings. The requirements covered are as follows: (a) pressure-temperature ratings (b) sizes and method of designating openings of reducing fittings (c) marking (d) materials (e) dimensions and tolerances (f) bolts, nuts, and gaskets (g) tests.