Mistras PHAT Scan©
In-service storage tank inspection
Page last modified
April 11 2024
PHAT Scan© is a NDT examination technique used for non-invasive and in-service inspection of the internal shell-to-bottom connection (corner weld) on above ground storage tanks and/or the annular critical weld region of the annular plate.
With PHAT Scan © local corrosion damage caused by a tear-shaped storage medium and crack like indications, in which the crack orientation perpendicular to the vessel wall is due to low cyclic fatigue, can be recorded. On-stream / non-intrusive inspection (NII) technology.
Pros & Limitations
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With PHAT Scan © the storage tank still remain operational
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PHAT Scan© has a high level of reproduce ability, measurements from the past can be compared with current measurement data
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With aid of PHAT Scan© reports and plots, local repairs can be scheduled in advance of planned “out-of-service” inspection
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With PHAT Scan © crack-like indications, pit shaped corrosion and pitting of shell plate can be detected and sized from an indication depth/height of approximately 1,5 mm (0,06”)
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With PHAT Scan © local corrosion damage caused by a tear-shaped storage medium and crack like indications, in which the crack orientation perpendicular to the vessel wall is due to low cyclic fatigue, can be recorded. (On-stream technology)
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A level of cleanliness is required
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Not ATEX proof
Specification
| Specification Title | Specification Description |
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Application
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Above ground storage tanks.
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Inspection
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The internal shell-to-bottom connection (corner weld) and/or the annular critical weld region of the annular plate
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In-service inspection possible
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Yes, in-service inspection available with PHAT Scan©
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Accuracy
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Accuracy of the remaining annular plate thickness measurement is 10%. Crack-like indications, pit shaped corrosion and pitting can be detected and sized from an indication depth/height of ± 1,5 mm (0,06”)
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Temperature
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From 5°C till 50°C.
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Areas of Application
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Shell and annular plates within the storage tanks.
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Repeatability
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Measurements from the past can be compared with current measurement data.
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Compliance
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EEMUA 159 / API 653
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Reviews
Technology Readiness Level
The Technology Readiness Level (TRL) indicates the maturity level of novel technologies. Learn more about the TRL scale used by us.
[9/9]
Development
Technology demonstration
Mature / Proven
Relative Business Impact
Solution Deployed By
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