Historical
ANSI/ASME B16.39-1998
Pipe Unions, Malleable Iron Threaded
Provides requirements for the following: (a) design; (b) pressure-temperature ratings; (c) size; (d) marking; (e) materials; (f) joints and seats; (g) threads; (h) hydrostatic strength; (i) air pressure test; (k) sampling; (l) coatings; and (m) dimensions
American Society of Mechanical Engineers [asme]