The chart shows results of a test performed to see which method has the best ability of detecting flaws in pipeline welds. The question the test was performed to answer is "With phased array becoming a possible replacement for radiography, is it reliable to use in detection of weld defects?" After careful interpretation of the results, the study concludes that the risk of using radiography in terms of reliability increases incredibly as pipe thickness increases. Phased array was able to detect critical flaws as the pipe thickness increased, where radiography struggled to detect these flaws.
Phased array is a quality testing method, and its detection ability is really shown when it is used on thick pipeline welds. It has been said before that the technology can see fly feces. Its detection ability is high, and the use of phased array also allows for the ability to measure and specifically locate the flaw.
When quality is a major concern, phased array is a superior testing method. Its ability to locate flaws has been tested and proven effective.