Asset Integrity ManagementNov 2025
Reverse Engineering for Underground Storage Tank
A reverse-engineering assignment for an underground fuel tank, including thickness evaluation, technical redraw, and reference data reconstruction.
Executive Snapshot
A faster way to understand the engagement
Project Overview
What this project covered
This work reconstructed the technical basis of Tangki Penimbun 1 at SPBU Coco 31.154.01 to provide usable engineering records where complete historical data was not available. The scope covered field-based parameter capture, dimensional verification, structural thickness evaluation, and recreation of technical information required for future technical reference.
Technical Facts
Structured data pulled from the project basis
Head MaterialSA 283 Grade C
Shell MaterialSA 283 Grade C
Design / Operating PressureATM / ATM
Actual Shell Thickness8.67 mm
Actual Head Thickness9.76 mm and 9.69 mm
Buckling vs External Pressure13.71 psi vs 8.42 psi
Work Scope & Method
How the assignment was executed
Collect field data and define assumptions
Because complete technical records were unavailable, the work started with direct measurements, site information, and engineering assumptions based on accepted references.
Run thickness and external-pressure checks
The tank was checked through thickness evaluation and buckling-pressure verification to confirm whether the vessel remained structurally defensible.
Rebuild the technical basis
The output includes recalculated technical data and redrawn engineering information so the asset can be referenced more reliably in future inspections.
Context and delivery pressure
The client needed a reliable technical record for an operating underground tank without depending on incomplete legacy documentation, while still maintaining engineering defensibility for future review and inspection.
How the work was structured
We translated field observations and measured conditions into recalculated thickness checks, refreshed equipment data, and engineering redrawings so the asset could be referenced through a more structured documentation basis.
Key Findings
Important technical takeaways
Measured thickness remains above required minimum
The reported head and shell thickness values are still acceptable against the minimum steel-thickness requirement used in the assessment.
External-pressure resistance is still adequate
The calculated buckling pressure is above the estimated external load, which supports the structural viability of the underground tank configuration.
Deliverables
Key outputs from the engagement
- 01Technical datasheet reconstruction
- 02Thickness evaluation summary
- 03Engineering redraw package
- 04Reference basis for future inspection