1.1 Describes the procedures for spot radiography of ferrous butt welds that
have a joint efficiency factor of not more than 85%, or welded butt joints in
ferrous materials for which the design unit stress factor does not exceed 85%
of the allowable unit stress of the base metal. It also includes
recommendations on acceptance criteria by which the welded butt joints are to
be assessed. 1.2 This standard does not apply to the spot radiography of repair welds in
castings.