ASTM E2700-20
Standard Practice for Contact Ultrasonic Testing of Welds Using Phased Arrays
| Language: | English |
| Released: | 2020-07-13 |
| Pages: | 10 |
| Standards number: | ASTM E2700-20 |
| Standard number: | E2700-20 |
| Released: | 01.06.2020 |
| Status: | Active |
| Pages: | 10 |
| Section: | 03.04 |
| Keywords: | nondestructive testing; PAUT; phased arrays; phased array probe; ultrasonic contact examination; ultrasonic NDT of welds; welds; |
1.1 This practice describes ultrasonic techniques for examining welds using phased array ultrasonic methods (see Note 1 and Note 2).
1.2 This practice uses angle beams, either in S-scan or E-scan modes, primarily for butt welds and Tee welds. Alternative welding techniques, such as solid state bonding (for example, friction stir welding) and fusion welding (for example, electron beam welding) can be examined using this practice, provided adequate coverage and techniques are documented and approved. Practices for specific geometries such as spot welds are not included. The practice is intended to be used on thicknesses of 9 to 200 mm. Greater and lesser thicknesses may be examined using this practice if the technique can be demonstrated to provide adequate detection on mockups of the same wall thickness and geometry.
1.2.1 Extreme caution should be used when attempting to size indications using phased array. It is likely that without proper procedures, indications can be oversized due to beam divergence, multiple virtual probes returning signals from the same indication, etc. For more guidance, see 12.4.
1.3 Units—The values stated in SI units are to be regarded as standard.
Note 1: This practice is based on experience with ferrous and aluminum alloys. Other metallic materials can be examined using this practice, provided reference standards can be developed to demonstrate that the particular material and weld can be successfully penetrated by an ultrasonic beam.
Note 2: For additional pertinent information, see ASME BPVC Section V, Article 4, Guide E2491, Practice E317, and Practice E587.
1.4 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.
1.5 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.