ASTME21302无损检测_VIP专享

Designation: E 213 – 02An American National StandardStandard Practice forUltrasonic Examination of Metal Pipe and Tubing1This standard is issued under the fixed designation E 213; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice 2 covers a procedure for detecting discon-tinuities in metal pipe and tubing during a volumetric exami-nation using ultrasonic methods. Specific techniques of theultrasonic method to which this practice applies includepulse-reflection techniques, both contact and non-contact (forexample, as described in Guide E 1774), and angle beamimmersion techniques. Artificial reflectors consisting of longi-tudinal, and, when specified by the using party or parties,transverse reference notches placed on the surfaces of areference standard are employed as the primary means ofstandardizing the ultrasonic system.1.2 This practice is intended for use with tubular productshaving outside diameters approximately1⁄2 in. (12.7 mm) andlarger, provided that the examination parameters comply withand satisfy the requirements of Section 12. These procedureshave been successful with smaller sizes. These may be speci-fied upon contractual agreement between the using parties.These procedures are intended to ensure that proper beamangles and beam shapes are used to provide full volumecoverage of pipes and tubes, including those with low ratios ofoutside diameter-to-wall thickness, and to avoid spurioussignal responses when examining small-diameter, thin-walltubes....