Asset Integrity ManagementFeb 2025
Residual Life Assessment for LPG Storage Tank T-A/16248
A residual life assessment for an LPG storage tank, focused on thickness adequacy, derating basis, corrosion review, and inspection interval planning.
Executive Snapshot
A faster way to understand the engagement
Project Overview
What this project covered
This project evaluated the continuing serviceability of Storage Tank T-A/16248 through thickness review, corrosion-rate assessment, risk framing, and operating recommendations. The work was intended to provide a defensible integrity basis for a mature LPG storage asset.
Technical Facts
Structured data pulled from the project basis
MaterialSPV 450
Design Pressure18.00 kg/cm²
Operating Pressure8–10 kg/cm²
Actual Shell Thickness12.44 mm
Actual Head Thickness13.70 mm
Recalculated MAWP13.91 kg/cm² (derating basis)
Work Scope & Method
How the assignment was executed
Recalculate thickness and pressure basis
The report checks actual shell and head condition against code-based thickness requirements to confirm how the vessel should be rated today.
Evaluate MAWP and remaining-life position
The assessment compares actual measured condition, corrosion-rate assumptions, and pressure-vessel calculation logic to define the safe operating basis.
Frame the risk for continued service
The output combines calculation results with qualitative risk review so the tank can be discussed in both technical and operational terms.
Context and delivery pressure
The client needed a balanced decision basis for continued use of an older pressure vessel where actual thickness, corrosion history, and operating suitability had to be interpreted together rather than in isolation.
How the work was structured
We organized the evaluation around thickness adequacy, derating logic, corrosion-rate interpretation, and risk-informed inspection planning so the resulting recommendation stayed technically grounded and operationally practical.
Key Findings
Important technical takeaways
The original design-pressure check is not the right story for the current condition
The calculation appendix shows the integrity discussion had to move toward a recalculated MAWP / derating basis rather than simply repeating the original design rating.
Operational risk remains manageable but not trivial
The report categorizes the storage tank as medium risk and notes that no leakage or major failure event had been recorded in the operating history considered.
Deliverables
Key outputs from the engagement
- 01Thickness and MAWP evaluation
- 02Corrosion-rate assessment
- 03Residual life and risk summary
- 04Inspection interval recommendations