1.1 ,This specification covers only factory-made wrought aluminum and aluminum-alloy welding fittings in contrast to field-made fittings. The term “,welding fittings”, applies to butt-welding or socket-end parts, such as 45°, elbows, 180°, return bends, 90°, short radius elbows, and other types made to the dimensional standards specified by ASME B16.9 and B16.11.