It is important to recognise corrosion / erosion patterns as early as possible. SonoInspec has different ultrasonic systems available to determine the remaining lifetime of the plant, based on the measured corrosion and erosion rates.
Most of the SonoInspec corrosion inspection services can be applied on high temperature when your plant is in production. Our systems can measure up to 500°C (932°F). Full continuous measurement is possible up to 350°C (662°F) SonoInspec is focussing on inspections at high temperature with mobile inspection teams. The inspection team consists of 2 or 3 inspectors with portable equipment.
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100% coverage with video tracking
C-scan corrosion mapping at high temperature when the plant is in production
Fast and better results with hydroform technology
C-scan corrosion mapping with video tracking
Hydroform PAUT corrosion mapping technique
PAUT Line scans for wall thickness measurement
TOFD line scans for wall thickness measurement
Manual wall thickness spot / point measurements
Today many plants follow a predictive maintenance strategy. It is therefore important to recognise corrosion / erosion patterns as early as possible. Different ultrasonic systems are available to determine the remaining lifetime of the plant, based on the measured corrosion and erosion rates. The measurement data will be entered into the RBI database. The accuracy of the measurement is very important for the output of the RBI database.
An important factor is the reproducibility of the measurements. Measuring exact on the same location is essential, to avoid false assumption on corrosion rates. Manual wall thickness measurements are taken at key points only. There is a large chance that the actual thinnest point at the measurement location is missed, even when the procedures prescribes a 100% inspection. Other error sources can come from different equipment settings, changed surface conditions and operator errors. It is therefore risky to use the obtained wall thickness data for trending purposes as it can lead to large deviations between subsequent inspections. These deviations in corrosion and erosion rates influences the remaining life time calculations adversely. The SonoInspec corrosion mapping technologies eliminate these drawbacks.
The C-scan corrosion mapping system with video tracking has a number of advantages against the manual measurements:
Coverage is guaranteed as the measurements are mapped automatically
Inaccuracies in equipment settings and coupling are visible immediately in the resulting picture
Trending of the data becomes more reliable as much more data is available
Probability of detection of pitting and localised corrosion is high in comparison with manual ultrasound wall thickness measurements
The C-scan corrosion mapping technique is extremely suitable for inspections at high temperature as the positioning of the probe is recorded with a camera. The technology is very suitable to map area’s on bends, t-pieces etc. The result is a coloured image of an area, where each colour / pixel represents a wall thickness measurement. All this data can be downloaded in .csv file format for further processing / trending in RBI related tools. C-scan is an amplitude based ultrasound thickness measurement. The application is very suitable for corrosion monitoring.
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Hydroform is a semi-automated phased array solution for corrosion mapping. The probe has a permanent water column for coupling, comparable with an immersion-tank inspection technology. Therefore, a wedge is not needed and wedge echoes are banished to the past. Hydroform is a manual propelled fast corrosion mapping tool. The near-surface resolution is excellent because of the permanent water column. The hydroform tool is not available for corrosion mapping on objects at high temperature.
PAUT line scans is a fast and simple way for mapping the wall thickness. The probe is connected to a wheel encoder for axial positioning. The high temperature phased array probes can be used to detect area’s with material loss up to 350°C (662°F).
Learn more about PAUT
Especially when wall thickness measurements are required at very high temperature >350°C (662°F), TOFD line scans can be an excellent solution. TOFD is an extreme accurate measuring technology. The coverage can be guaranteed by marking up a grid for inspection.
Learn more about TOFD
We’re happy to help you! Feel free to fill out our contact form and we’ll get back to you as soon as possible!
Can you do corrosion mapping on bends?
Yes we can. With our C-scan inspection equipment with video tracking we can map almost all configurations. The camera is following the ultrasound probe and the results are mapped in the software, whereby the different colors represent the differences in wall thickness.
How many square meters can you map on a day with the video tracking system?
It depends on the configuration, but we can map on average around 15 areas of 500x500 on a normal working day.
When are you applying the hydroform probe and when the video tracking system?
The video tracking system is extremely suitable for complex geometries and for mapping at high temperature up to 350°C (662°F). The hydroform probe is the perfect solution for mapping of larger area’s for example on reactors and when the surface condition is not perfects, since the tool makes use of a water column direct under the probe.
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