This specification~ covers the procedure and acceptance standards for straight-beam. pulse-echo. ultrasonic examination of rolled carbon and alloy steel plates. 1/2 in. (12.7 mm) and over in thickness. of fully killed pressure vessel quality. It was developed to assure delivery of steel plates free of gross internal discontinuities such as pipe. ruptures. or laminations and is to be used whenever the inquiry. contract. order. or specification states that the plates are to be subjected to ultrasonic examination.
NOTE-The values stated in U.S. customary units are to be regarded as the standard.