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QSR1® introduced the Quantitative Short Range technique to the field of Non‑Destructive Testing (NDT). As the first guided wave scanning instrument, it made possible to measure wall thickness in areas where direct access is not available.
Developed around the challenge of quantifying Corrosion Under Pipe Supports (CUPS), QSR1® established a practical means to quantitatively assess the pipe‑to‑support contact area without access to the underside of the pipe, which is required by other methods.
The same approach is now applied across the QSR® System, extending beyond pipe supports to a wider range of features.
Metal Support
Concrete Support
Saddle Support
Scab Patch
QSR1® is used to determine the condition of pipe wall areas obscured by external features, without removing or disturbing those features.
Typical applications include, among others:
Welded simple supports or fully axially welded saddle supports are not included, as the weld introduces strong reflections that dominate the response and obscure the results.
For geometries where circumferential access is not available, QSR® Axial enables scanning from the side of the area of interest.
QSR1® operates with two sensor carts, one acting as a transmitter and the other as a receiver, each housing the transducers and motors that drive the scan. At each axial position, the transmitter generates shear horizontal (SH) guided waves that propagate around the pipe and are detected by the receiver on the opposite side.
This configuration creates two measurement paths between the sensors: one along the top of the pipe and one along the bottom. At each position, the system reports the average remaining wall thickness along each path and the minimum remaining wall thickness. As the system advances in controlled axial steps, these measurements build a thickness profile of the scanned section.
WaveProQSR™ software controls scan configuration and data acquisition from a computer connected to the QSR1® via Ethernet or USB.
See how QSR1® quantifies remaining wall thickness in areas with CUPS without removing the support or interrupting operation, demonstrated here on an NPS 10 Schedule 40 pipe with two artificially introduced external defects and one internal corrosion defect.
A Level 2:QT inspector sets up the system, runs the “Auto Configure”, starts an “Auto Scan”, and processes the results to verify remaining wall thickness at the defect locations.
