ISO 10893-7:2011 specifies the requirements for digital radiographic X-ray testing by either computed radiography (CR) or radiography with digital detector arrays (DDA) of the longitudinal or helical weld seams of automatic fusion arc-welded steel tubes for the detection of imperfections. ISO 10893-7:2011 specifies acceptance levels and calibration procedures. ISO 10893-7:2011 can also be applicable to the testing of circular hollow sections.