American Ductile Iron Flange Fittings
AMERICAN Standard Method of Designating Location of
Tapped Holes and Sequence of Openings
Taps are usually made directly into the wall of the flanged fitting. However, if the wall thickness is insufficient for the required size and angle of tap, a tapping boss is provided on the fitting.
In the designation of the openings of reducing fittings, they should be read in the order indicated by the sequence of the numbers 1, 2, 3 and 4 as shown. In designating the outlets of side outlet reducing fittings, the side outlet is named last, and in the case of a cross, which is not shown, the side outlet is designated by the number 5. Note that numbering sequence for wye ends differs from that shown in ANSI B16.1 standard (for gray cast iron flanged items).
|
