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Standard Practice for Ultrasonic Examination of Turbine-Generator Steel Retaining Rings
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This practice covers ultrasonic examination of turbinegenerator retaining rings produced in accordance with Specifications A288 and A289/A289M with an inside diameter to wall thickness ratio equal to or greater than 5:1 and with wall thicknesses from 1 to 4 in. [25 to 102 mm].
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