29.3.Why ultrasonic inspection?

The principle of ultrasonic testing is as follows: When ultrasonic waves propagate through inspected materials, changes in acoustic properties and internal structures of the material affect wave propagation. By detecting the℃and characteristics of these interactions, we can assess material performance and structural variations. Ultrasonic testing is categorized into manual and automated methods, with the automated method being our preferred approach. 29.3.1. What are the standards for ultrasonic inspection? ISO 10893-11 Automatic Ultrasonic Inspection of Longitudinal and/or Transverse Defects in Welded Steel Pipe Joints ASTME164 Standard Operating Procedures for Ultrasonic Contact Testing of Welded Components ASTME213 Ultrasonic Testing Methods for Metal Pipes ASTME273 Standard Operating Procedures for Ultrasonic Contact Testing of Welded Components ASTME587 Standard Practice for Contact Ultrasonic Oblique Method Testing SY/T6423.4 Non-Destructive Testing Methods for Pressure-Enclosed Steel Pipes in Oil and Gas Industry-Ultrasonic Inspection of Layered Defects Near Welded Joints SY/T6423.2 Automatic Ultrasonic Inspection of Longitudinal and/or Transverse Defects in Welded Pipe Joints NB/T47013.3 Ultrasonic Testing for Non-Destructive Inspection of Pressure Equipment.