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Weld Testing Wisdom: Your Guide To Non-destructive Weld Inspection

Posted by on May 14, 2018 10:00:00 AM

Weld Testing Wisdom: Your Guide To Non-destructive Weld Inspection
Weld Testing Wisdom: Your Guide To Non-destructive Weld Inspection

Never underestimate the importance of weld inspections. Whether you seek to improve safety, carry out quality control, or comply with all applicable legal requirements, you need detailed, reliable information to do so. The best way to get this information is through non-destructive testing, or NDT. NDT inspection services analyze weld materials without harming them. This allows you to gather all the information you need on your welds, whenever you need it, confident that you won’t be jeopardizing them in the process. Shawcor offers a selection of NDT testing services, including:

Shear Wave Ultrasound Inspections

Shear wave ultrasound weld inspections involve using an ultrasonic beam to examine welds. We direct a sound wave toward the testing area at an angle. The beam then bounces back toward the transducer. By measuring the strength of the signal and how long it took to return, we can determine how far it traveled on the way to the weld and back. If the sound wave is particularly weak or takes an especially long time to return in certain areas, that suggests there are anomalies in that area. We thus know to inspect those parts of the weld for dents, cracks, and other discontinuities that could undermine its performance.

Shear wave ultrasonic testing lets you obtain accurate images and reports on your welds in real time. It is especially suitable for detecting non-laminar anomalies on welds. This method is fully compatible with portable and automated equipment, and can detect problems far more consistently than you’d find them if you inspect your welds manually.

Phased Array Ultrasound Testing

Like shear wave inspections, phased array ultrasound testing uses sound to examine welds without damaging them. Suitable for more advanced inspections, it lets you conduct both standard A-scans and sectorial scans, obtaining comprehensive volumetric data in real time. You can use it to detect:

  • Weld Thickness- Based on the amount of time it takes for sound to pass through the weld and back, you can determine how thick it is. This lets you shore up any welds that are too thin for safety or efficiency.
  • Crack Locations- If the sound takes particularly long to return in certain areas, that indicates you’re dealing with a crack or other discontinuity. Phased array testing tells you both its location and its severity, allowing for quick repairs.
  • Corrosion Inspections- With phased array testing, you can identify corrosion in its early stages and prevent it from undermining the weld.

Phased array ultrasound testing is performed for many of the same purposes as radiographic testing. But unlike radiographs, it doesn't rely on hazardous radiological materials, meaning there’s little need to shut down the area or take extra safety precautions. As a result, you’ll be able to carry out non-destructive tests more efficiently and with fewer risks to your employees.

Shawcor offers NDT inspections for welds and countless other industrial components and devices. For more information or to order testing on your equipment, visit our website today.

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