Don't miss out!

Log in / Register and unlock all the features

Mistras PHAT Scan©

In-service storage tank inspection

Page last modified
Tuesday, March 30, 2021 - 15:48

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 / NII technology )
 

Pro/con

With PHAT Scan © the storage tank still remain operational
PHAT Scan© has a high level of reproduce ability, measurements from the past can be compared with current measurement data
With aid of PHAT Scan© reports and plots, local repairs can be scheduled in advance of planned “out-of-service” inspection
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”)
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)
A level of cleanliness is required
Not ATEX proof

Specification

Application Above ground storage tanks.
Inspection The internal shell-to-bottom connection (corner weld) and/or the annular critical weld region of the annular plate
In-service inspection possible Yes, in-service inspection available with PHAT Scan©
Accuracy 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”)
Temperature From 5°C till 50°C.
Areas of Application Shell and annular plates within the storage tanks.
Repeatability Measurements from the past can be compared with current measurement data.
Compliance EEMUA 159 / API 653

Relative Business Impact

Do you have experience with this technology that you want to share?

Login or create an account with only your email address to continue.

continue
Technology Readiness Level

[9/9]

Development Technology demonstration Mature / Proven

About MISTRAS

MISTRAS Group is one of the world's largest suppliers of integrity and inspection services. We specialise in providing innovative asset integrity solutions for all projects using enhanced services that include asset monitoring, advanced and conventional NDT

Technology deployed by:
Login to view