Ultrasonic Nondestructive Evaluation:
Using ultrasound to find and evaluate flaws in engineering products and structures. This is useful in the following fields:
- Nuclear power plants
- Oil & gas piplines
- Ships, trains, and automobiles
- Process control in manufacturing
Two-dimensional sector-scan image of a flaw inside a girth weld linking two large sections of an oil pipeline. Blue lines designate path of ultrasound; the two coloured echoes represent ultrasonic pulses diffracted from the top and bottom extremities of the weld defect. This particular flaw is approximately 3 mm in depth emanating from the weld root (inner wall of pipeline).