Geometric check according to API 650 and API 653

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The service

RAN Innovation provides geometric verification servicea for storage tanks:

  • new tanks (API 650)
  • existing tanks (API 653)

Checks include:

  • out of plumbness check
  • roundness check
  • settlement evaluation
  • floating roof traveling check

Surveys are conducted using 3D laser scanner:

  • internal survey for new or maintained tanks
  • external survey for tanks in operation, (bottom geometry cannot be scanned in this case)
Tank bottom analysis

Data is processed in a specific reference system and, using software exclusively owned by RAN Innovation, the digital twin of the tank is created, i.e. a parametric model that contains detailed information relating to the real geometry, materials and thicknesses of the tank itself.

The digital twin enables comprehensive calibration reports, considering:

  • Effective geometry
  • Tank axis rotations
  • Shell course alignment (internal, axial, or external)
Tank shell analysis and settlement evaluation

Final reports summarize all checks and provide recommendations for resolving any identified issues..

For floating roof travel, we analyze the gap between the roof and tank shell at each reference height, assessing all geometrically admissible configurations.

Roundness and out of plumbness check section example
Floating roof traveling check section example

This service allows you to anticipate and prevent:

  • Floating roof blockage
  • Seal overturning

It can also be used proactively to design seals correctly.

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