ASTMA388A388M2003大型钢锻件超声波检测的标准实施规程英文

Designation: A 388/A 388M – 03Used in USNRC-RDT standardsAn American National StandardStandard Practice forUltrasonic Ex amination of Heav y Steel Forgings1This standard is issued under the fixed designation A 388/A 388M; the number immediately following the designation indicates the yearof 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.1. Scope*1.1 This practice 2 covers the examination procedures for thecontact, pulse-echo ultrasonic examination of heavy steelforgings by the straight and angle-beam techniques. Thestraight beam techniques include utilization of the DGS (Dis-tance Gain-Size) method. See Appendix X3.1.2 This practice is to be used whenever the inquiry,contract, order, or specification states that forgings are to besubject to ultrasonic examination in accordance with PracticeA 388/A 388M.1.3 The values stated in either inch-pound or SI units are tobe regarded as the standard. Within the text, the SI units areshown in brackets. The values stated in each system are notexact equivalents; therefore, each system must be used inde-pendently of the other. Combining values from the two systemsmay result in nonconformance with the specification.1.4 This specification and the applicable material specifica-tions are expressed in both inch-pound units and SI units.However, unless the order specifies the applicable “M” speci-fication designation [SI units], the material shall be furnishedto inch-pound units.1.5 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility...