WAND Applications for Scrubber Vessels, Glycol Vessels and Water Lines

Corrosion rate needed to be determined at various locations on a scrubber vessel.

Overview

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

Challenges

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.

Solution

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

How did they benefit from WAND?

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

Using ECHO extension coils to offset the harder to reach measurement locations, inspection time was significantly reduced.