This International Standard specifies requirements for automated ultrasonic shear-wave (generated by single element probes or the phased-array technique) testing of seamless and welded (except submerged arc-welded) steel tubes, for verification of hydraulic leak-tightness. The testing technique is applied for the detection of predominantly longitudinal imperfections. Where applicable, Lamb-wave testing may be applied at the discretion of the manufacturer. This International Standard is applicable to the inspection of tubes with an outside diameter greater than or equal to 10 mm, and with an outside diameter-to-thickness ratio greater than or equal to 5.