Standard Practice for
Ultrasonic Examination of Turbine-Generator Steel Retaining
Rings1
This standard is issued under the fixed designation A 531/A 531M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
click below to download Astm A 531/A 531M – 91 (Reapproved 2001) pdf free
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click here to download Astm A 530/A 530M – 04 pdf free download