Tubing applications are usually defined as the inspection of ferromagnetic or nonferromagnetic tubes in a variety of assets such as shell-and-tube heat exchangers, steam generators, boilers, coolers, and condensers.
The tubes in such assets are usually small in diameter and very numerous (some bundles can contain as few as five tubes, while others as many as 50 000). The tubes in this fixed equipment are sometimes straight, sometimes bent, sometimes twisted, which requires a vast array of probes to inspect the tubes from the inside.
Inspecting such tubes is common in the oil, gas, and petrochemical industry, as well as in the power generation and nuclear industries. Timing is usually critical, as shutting down for inspection is usually costly, but more so when the shutdowns are unplanned. Inspections must therefore be highly productive, considering the large amount of tubes to be inspected.