Customer: Chemical manufacturer
Industry: Agrochemicals
Structures: Scrubber vessels, glycol vessels and water lines
Operating temperature: Ambient
Type of degradation: Aqueous corrosion
Frequency of inspection: Once/month – Once/year
Corrosion rate needed to be determined at various locations on a scrubber vessel. Manual UT was being used for this, however poor measurement repeatability, due to human-error, was making accurate trending of internal corrosion impossible
A number of thickness measurement locations were hard to access using a conventional UT probe, due to obstructions. This required time to prepare the measurement location and also presented a safety risk to personnel
The customer replaced manual UT single point readings with WAND sensors at a number of thickness measurement locations along their water lines as well as scrubber and glycol vessels. Data from the sensors was collected using the WAND handheld data collector. ECHO extension coils were also used with WAND sensors for those locations that were obstructed
Thanks to the repeatable thickness readings produced from the permanently installed WAND sensors, the customer was able to start accurately trending internal corrosion
Using ECHO extension coils to offset the harder to reach measurement locations, inspection time was significantly reduced