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SystemPipelines, Midstream & LNG

Storage Tank Inspection Management

Storage tank inspection management that reworks each next due date from the tank’s own readings, and lets no one move a date later on a hunch.

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Follow one tank from 14:04 to the countersignature ↓
The problem

Storage tank inspection dates keyed once and trusted for a decade

An inspection firm hands over a report with a corrosion rate and a next date, and someone keys that date into the maintenance system. Nobody rereads the floor table behind it. If the report used the slow rate from the tank’s first reading and left a recent jump sitting unused in its own history table, the register runs years past what the plates say.

The signature has the same blind spot. A report signed after the inspector’s certificate ran out looks like any other in the file, and the repairs resting on it get closed. Checking either one means opening pencil sheets, faxes and scanned PDFs tank by tank, and no terminal has the engineers to do that across its whole farm.

Built forTank integrity engineersTerminal managersTank inspectorsRepairs coordinatorsCompliance auditors

The Problem Today

Next inspection dates sit in a register, while the readings that should set them sit in decades of old reports.

3 yrs
term of a tank inspector’s certificate before it must be renewed published
1,395
hours for 1,860 reports read by hand, 45 minutes apiece our estimate

Read by hand today

  • Old reports
  • Readings
  • Signatures
  • Repairs
  • A copied rate hides a jumpThe long rate stays while the floor loses faster
  • A lapse nobody seesSigned after the certificate ended, and filed

The Solution

  1. Old reports readTyped, faxed or pencil; a digit nobody can read is held
  2. Date reworked, sum shownFloor left, divided by the rate, against the site’s own minimum
  3. Certificate on the dayThe signer’s term against the signing date, with the page to open
  4. Moved, then countersignedOne person moves a date earlier; another signs on the pages opened

Built-in controls

  • No button moves a date later
  • Each signature states what was and wasn’t opened
  • Agents never call a tank safe; people decide

What You Get

Each date has its sum behind it and a person’s name on it, and the file shows who opened what.

  • Repairs followed to closureClosed only by an inspector with a current certificate
  • An evidence file per tankSignatures, openings, and what nobody opened
  • Outages that keep tanks runningA tank near its minimum floor cannot slide later
One tank, one afternoon

One storage tank inspection date, reworked and countersigned in an afternoon

A diesel tank in a north farm carries a next inside inspection five years out, and its own floor readings disagree. An engineer and a terminal manager settle it on the working screens.

demoThe terminals, the tanks, the people and every reading are sample data.

  1. 0114:04

    Of 214 next due dates, 56 look too late against their own readings

    Tank integrity engineer

    The terminal opens as a drawing: each tank to scale in its farm and dike, shaded by how far its date can be trusted. On the right, a ladder of the widest gaps puts T-126 first at 5.0 years. He reruns the check on Terminal 3, and the agents hand him the 2 tanks there reached on paper.

  2. 0214:05

    Page 14 of the last inside report, plate F-65 at 0.148 in

    Tank integrity engineer

    Clicking the lowest floor reading opens the report itself at the floor scan table, with the cited value marked in yellow. The side panel already says the signer was expired on the day. The opening goes on the trail in his name, and it counts for him alone.

  3. 0314:05

    Register says five years more than T-126’s readings give

    Tank integrity engineer

    The shell is unrolled flat with each thickness reading pinned, beside the floor plates to scale. On the right: 0.048 in left above the site’s minimum, losing 0.012 a year since the reading before, gives 4.0 years. The report divided by the long rate of 0.0053 instead, which the site’s rule sets aside because it is lower.

  4. 0414:07

    The report was signed 35 days after the inspector’s term ended

    Tank integrity engineer

    The certificate record opens as a page, with the term end marked. Thirty-five days alone would prove nothing, since the certification body accepts an application in the 90 days after a term ends. This inspector never applied, so that certificate expired and a new one came only after a new exam. Under the site’s sample rule the report now waits for a staff inspector to re-check it.

  5. 0514:08

    Move it later is refused for T-126, and the attempt is logged

    Tank integrity engineer

    With both pages opened, he picks the middle of three inside dates the screen offers, with the reason code for a rate since the last reading. Trying the other button brings a refusal: a tank at or near its minimum on paper gets no later date from anyone, short of a new floor reading that is accepted and countersigned.

  6. 06Minutes later

    Her countersign stays grey until she opens four pages herself

    Terminal manager

    The move reaches the terminal manager with his reason. Four pages sit above her button: the floor table, the earlier reading, the signature page and the certificate record, each marked not opened by her. His openings count for nothing on her signature.

  7. 0714:16

    Page 22: a signature dated weeks after the term ran out

    Terminal manager

    She reads the inspector’s statement with the signing date marked, and his status on that day beside it. She sees the evidence itself, not a summary of it, and the trail records that she was the one who opened it.

  8. 0814:18

    Hold receipts and draw down, with two checks each shift

    Terminal manager

    With all four pages ticked as hers, she rules how the tank runs until it is opened: out of service now, hold receipts and draw down, or her own words. She picks the hold, adds daily inventory reconciliation and a dike and ring wall walk each shift. Sending it back needs the same ruling, so refusing the date never leaves the tank running as it was.

  9. 0914:24

    The register row now names the mover, the countersigner and the hold

    Compliance auditor

    Once she countersigns, the register, the outage plan and the tank’s evidence file change together. The row reads moved, signed, with the old date, both names, the hold and its two checks. It also says the duty supervisor is not yet confirmed told, because nobody has said so, and nothing assumes it.

  10. 1014:24

    56 becomes 55, and the next date already waits for her

    Terminal manager

    Back on the farm, T-126 turns blue and the headline drops by one, since each date two people rule on leaves the count. The agents’ panel sums the estate: 1,812 of 1,860 reports read, 48 held, 203 dates reworked. One date already waits for her signature.

Four years of floor left on T-126, worked from its two latest readings

The same sum sits on the tank’s page, where each value opens its source.

Lowest floor reading, plate F-65, last inside inspection0.148 in
Less the site’s minimum, no leak barrierA sample site rule− 0.100 in
Floor left to lose0.048 in
Rate since the reading before, over 10.0 years0.012 in a year
Long rate since the first readingLower, so not used: the rule takes the higher0.0053 in a year
Floor left divided by the higher rate4.0 years

demoSample data, from the working solution.

Three things a tank inspection record hides until someone opens it

A slow rate copied forward

The report used the rate since the tank’s first reading, while the faster recent loss sat unused in its own history table.

A signature on a lapsed certificate

Signed after the term ended and not renewed in the window, so the report goes to a staff inspector before any repair can close on it.

A pencil digit nobody can read

Held for a person to rule on, and until then the earlier of the two dates stands.

Around the tank

Outages, certificates, reports and findings across the terminals

What the inspector, the repairs coordinator and the auditor work from on the same day. Click any screen for the full view.

Out of service tank inspectionsThree of five north farm diesel tanks would be out at once. T-126 cannot slide, so the planner proposes moving T-118 a week, inside its due date.
Inspectors’ terms on one timeline31 of 1,860 reports were signed after a term ended: 10 on a certificate that then expired, 21 renewed inside the window and flagged only for a look.
Every report, read or held565 inside, 692 outside, 262 shell thickness, 211 repair records and 130 settlement surveys. 48 wait for a person, because an unreadable digit is held.
Findings to closure547 open: 212 not planned, 226 planned and 109 repaired, waiting for an inspector. Only one with a current certificate can close a finding.
A doubtful pencil sheetAn old pencil sheet read as 0.335 in, sure to 61%, above the plate’s 0.3125 in nominal. Until the engineer rules on the digit, the earlier date stands.
One tank’s evidence fileBoth dates, the maker, the checker and the hold, then each page each of them opened, beside the tank’s 12 reports and each signer’s status on the day.
The trail86 lines this session: each opening, the refused later move, the countersignature and the agents’ passes. Nothing on it can be edited.

demoSample data, from the working solution.

Who moves a tank’s date, who countersigns, and who closes the repair

Maker and checker are two people, and each signature records the pages its signer opened.

Tank integrity engineer
Sees
The farm by state, each tank’s readings and the reworked sum
Signs
Moves a date earlier, rules on a doubtful reading, accepts a new floor reading
Terminal manager
Sees
Each move with the pages behind it, marked opened or not by her
Signs
Countersigns or sends back, and rules how the tank runs until it is opened
Tank inspector
Sees
Doubtful reports, floors to read and repairs waiting for him
Signs
Re-checks a report, files a new floor reading, closes a repair
Repairs coordinator
Sees
The out-of-service plan with due dates and the keep-in-service rule
Signs
Books outages and crews, and records work done
Compliance auditor
Sees
The register, each evidence file and the trail
Signs
Signs nothing; exports the file and the trail
The agents

Seven agents on the tank records, and not one of them can move a date

Each one hands its work to a named person.

Report reader

Reads old reports and thickness sheets one page at a time, pinning each value where it was found.

  • Never guesses a digit it cannot read
Date rebuilder

Reworks each date from the readings: floor left, divided by the higher rate, capped at the site’s limit.

  • Never moves a date
  • Never says a tank is safe
Certificate checker

Compares each signing date with the term on the certificate record, and opens the page.

  • Never accepts a report
  • Calls neither expired nor renewal window a verdict
Register comparer

Gives each tank one state, the worst that applies.

  • Never changes the register
Findings tracker

Follows a finding from report to work order to closure.

  • Never closes a finding
Outage planner

Proposes out-of-service windows, checks the keep-in-service rule and flags clashes.

  • Never slides a tank near its floor to a later window
  • Never touches the movements system
Evidence clerk

Builds each tank’s file: reports, certificates, rulings and who opened what.

  • Never leaves out a ruling, either way

What terminal engineers ask about storage tank inspection

What is storage tank inspection management?

Storage tank inspection management keeps each tank’s inspection dates, findings and repairs in step with its readings. Here agents read the old reports, rework the next due date from the floor and shell readings, and check each signer’s certificate on the signing day. An engineer moves a date and the terminal manager countersigns it.

How is a tank’s next inspection date reworked?

The floor left above the site’s minimum is divided by the higher of two rates: the loss since the reading before, and the loss since the first reading. The result is capped at the site’s longest interval. Each line is shown, and each value opens its own report page.

Which tank floor corrosion rate sets the date?

The higher one. A long rate since the tank was new can hide a recent jump, which is how a register ends up years later than the plates. After a repair or a first inspection, no rate is assumed and the site’s short interval applies.

What if a report was signed after the inspector’s certificate ended?

The certificate checker sorts it as expired or as signed inside the renewal window, and calls neither a verdict. Under your site’s rule the report can wait for a staff inspector’s re-check, and repairs resting on it cannot close until that is done.

Can anyone push a tank’s date later?

No button does it. A later date needs a new floor reading filed by an inspector, accepted by the engineer and countersigned by the terminal manager, who opens it herself. A tank near its minimum also cannot slide later in the outage plan.

Does it decide whether a tank keeps running?

No. The agents do not call a tank safe or unsafe, and the sum proves neither that a floor is thin nor that it is sound. The terminal manager rules how it runs, with the interim checks she picks.

How does it fit with the tank inspection software and systems we already run?

It reads your reports, certificate records, tank register and work orders without changing them, and writes nothing to the movements system.

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Bring one tank farm
and its oldest reports.

We’ll rework its next due dates from your own readings and show you which ones the register has wrong.

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