استاندارد ASTM A388

در خصوص ارزیابی آلتراسونیک بر روی قطعات آهنگری سنگین فولادی

به زبان انگلیسی

8 صفحه

Standard Practice for
Ultrasonic Examination of Heavy Steel Forgings

Scope*
1.1 This practice2
covers the examination procedures for the
contact, pulse-echo ultrasonic examination of heavy steel
forgings by the straight and angle-beam techniques. The
straight 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 be
subject to ultrasonic examination in accordance with Practice
A 388/A 388M.
1.3 The values stated in either inch-pound or SI units are to
be regarded as the standard. Within the text, the SI units are
shown in brackets. The values stated in each system are not
exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems
may result in nonconformance with the specification.
1.4 This specification and the applicable material specifications are expressed in both inch-pound units and SI units.
However, unless the order specifies the applicable “M” specification designation [SI units], the material shall be furnished
to inch-pound units.
1.5 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.