ASTM A 531/A 531M - 91 (Reapproved 2006) Standard Practice for Ultrasonic Examination of Turbine-Generator Steel Retaining Rings

American Society for Testing and Materials (ASTM). Current edition approved March 1, 2006. Published April 2006. Originally approved in 1965. Last previous edition approved in 2001 as A 531/A 531M – 91 (2001).5 p. This practice covers the procedures to be followed when performing ultrasonic shear and longitudinal wave tests on
-generator retaining rings with an inside diameter to wall thickness ratio equal to or greater than 5:1 and with wall from 1 to 4 in. (25 to 102 mm).