Nondestructive testing (NDT) is important because it helps ensure safety and reliability across a range of industries. Using NDT equipment such as flaw detectors, you can locate and size surface and subsurface flaws and defects in material. For example, this can be done for steel used in the engineering and construction of bridges, aircraft, motor vehicles, pipelines, and more. Hidden deficiencies can cause substantial risk to safety, so using NDT to help ensure maximum performance over time is important.