ASTM A388/A388M
Scope
1.1 This practice covers the examination procedures for the contact, pulse-echo ultrasonic examination of steel forgings by the straight- and angle-beam
techniques. The straight-beam techniques include utilization of the DGS (distance 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 A388/A388M.
1.3 Supplementary requirements of an optional nature are provided for use at the option of the purchaser. The supplementary requirements shall apply only
when specified individually by the purchaser in the purchase order or contract.
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact
equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
1.5 This practice 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.
1.6 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on
Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Keywords
angle-beam examination; back-reflection; DGS; reference block; straight-beam examination; ultrasonic;
ICS Code
ICS Number Code 77.040.20 (Non-destructive testing of metals)
DOI: 10.1520/A0388_A0388M-26