ASME/ANSI B16.9 - Factory-Made Wrought Steel Butt welding Fittings.This Standard covers overall dimensions,tolerances,ratings,testing,and markings for wrought factory made buttwelding fittings in sizes NPS 1/2 through
48 (DN 15 through 1200).
ASME/ANSI B16.28 - Wrought Steel Buttwelding Short Radius Elbows and Returns.This Standard covers ratings,overall dimensions,testing,tolerances,and markings for wrought carbon and alloy steel butt welding short radius elbows and returns.
The term wrought denotes fittings made of pipe,tubing,plate,or forgings.
ASME B16 Standards covers pipes and fittings in cast iron,cast bronze,wrought copper and steel
Dimensions of butt-welding fittings can be taken from the tables below