Reads the historian against each window, counts hours and tracks budgets.
- Never writes to the control system
- Never changes a setpoint
One exceedance, followed to the metal
Eleven hours short on wash water, from the clock to a booked crew
On a diesel hydrotreater, the wash water pump stopped on a seal leak at 18:40 and the new seal went in at 05:40. By 08:21 the inspection had moved and the crew was booked.
demoThe unit, the shift and each value shown here are sample data.
- 01Start of day
11.0 hours outside, and the year's budget of 24 already gone
Corrosion engineerThe first screen is one trend inside its critical, standard and informational lines, with 0.0% for 12 minutes marked where the pump stopped. Beside it, the counter reads 11.0 hours this event and 30.0 hours in twelve months against 24 allowed. Underneath, four steps answer so what: what happened, what it feeds, which metal, and when to look.
- 0218:40 to 05:40, replayed
Played back, the night shows the hour the yearly budget ran out
Corrosion engineerThe replay draws the night again. Flow falls to nothing for twelve minutes, under the 3% critical line, then sits at 3.2% on the small standby pump, under the 5% standard limit. The counter climbs and the ring turns from inside budget to used up. The engineer sees the exact hour the window's yearly allowance ran out, which no daily report shows.
- 0306:48
80% of the water stayed liquid, and its salt reached 7.9 wt%
Corrosion engineerOne citation opens the agent's two sums line by line. The wash rate in pounds an hour, the water the gas can carry at 240 °F, then the water left as liquid: 80%, above the guide. Then the salt made from the feed's nitrogen, 1,340 lb/h, and salt in that water at 7.9 wt%, over the site's 6 wt% limit. Every figure can be checked against its source.
- 04Before deciding
Eight monitoring points, all last read before the feed change
Corrosion engineerThe circuit sheet shows the injection point on carbon steel at 240 °F, upstream of an air cooler in a corrosion-resistant alloy. Eight monitoring points, read every three years. The thinnest, at the first elbow after the quill, reads 0.796 in against a 0.450 in minimum. Spot readings cannot see local attack, and none is newer than the feed change.
- 0507:02
Six pieces of evidence, six cited steps and one honest unknown
Corrosion engineerThe case puts the evidence on the left: the historian, the sums, the circuit sheet, the plan, the shift note and the wall readings. In the middle, each agent's step with its source. Below, how sure they are: high that it happened, high on the mechanism, unknown whether metal was lost. That unknown is why the proposal is to look within 30 days.
- 0608:12
The date and the reason are hers, and the signature is not
Corrosion engineerShe can take the proposed date, an earlier one, the next turnaround, or keep the plan as it stands, and a reason is required. She chooses the proposal with the reason exposure over budget and sends it on. The panel then says she made this decision, so she cannot sign it. The technical authority signs.
- 07After 08:12
Opened 0 of 6, and the sign button stays grey
Integrity technical authorityThe same case, seen by the checker. The evidence list now counts openings, and the decision panel reads opened 0 of 6 pieces of evidence beside a greyed sign button and a send back. Only opening each one turns it on. A send back clears what he opened, so a changed decision needs a fresh check.
- 08Before signing
The shift lead's own words, filed before handover at 06:05
Integrity technical authorityFifth of the six is the shift log. The lead wrote that the seal let go at 18:40, wash water went to zero, the board ran the critical response card, and the crew put the small spare on by hand at 18:52. It makes about 39 gpm. Maintenance had the new seal in at 05:40. The counter reads 5 of 6 opened.
- 0908:15
Signed after six openings, and only then is the work order released
Integrity technical authorityWith all six opened, the sign button turns on. He signs, and the panel records the date, the reason and who decided. The held work order goes to the inspection planner. Until this moment the inspection plan had not changed, because nothing moves there until a person decides and a second person signs.
- 1008:21
The scan is booked inside the signed date, and the other two stay held
Inspection plannerThe plan shows the injection point scan as booked, its work order and slot beside it. Two other circuits wait, held with the corrosion engineer, and their book buttons stay off. Below sit six moves signed in October. In the plan file it downloads, each unsigned row is marked not to be loaded.