Outage Surveys — Gladstone

TL;DR: Gladstone's alumina refineries, aluminium smelter and three Curtis Island LNG trains all live and die by the maintenance outage — every hour a unit is offline costs $50,000–200,000 in lost production. A shutdown survey Gladstone operators can trust delivers ±0.3–1.0 mm alignment, fit-check and registered as-built data inside that fixed window without ever sitting on the critical path. Industrial Spatial Solutions runs outage surveys across Central Queensland with laser trackers, MultiStations and RTC360 scanners calibrated to ISO/IEC 17025.

Key takeaways

• A shutdown survey in Gladstone is dimensional control scoped to a specific outage — a QAL calciner change-out, a Boyne Smelters potline rebuild, an APLNG compressor overhaul or an RG Tanna shiploader reline — where the asset earns nothing until it restarts.
• ISS achieves ±0.3–1.0 mm rotating-equipment alignment, ±0.02–0.05 mm coaxiality with a FARO tracker, and 2–6 mm at 50 m laser-scan accuracy using Leica MS60, TS16 and RTC360 instruments, all ISO/IEC 17025 calibrated.
• The work splits into pre-outage baseline capture, in-outage alignment and fit-check, and post-outage as-built verification before recommissioning — measurement is ready the moment an area is, never holding up the next lift.
• Alumina refining, aluminium smelting, LNG and the coal/bauxite terminals are the primary Gladstone users; outage cycles run from annual minor shuts to 4–6 year major turnarounds.
• The coastal, cyclone-prone environment and continuous operation mean tie-in geometry and corroded structure must be verified on cold, open equipment that is only accessible during the window.

Why Gladstone outages demand specialist survey

Gladstone packs more heavy process plant into one harbour than anywhere else on Australia's east coast, and almost none of it is greenfield. Queensland Alumina Limited (QAL) — a Rio Tinto/Rusal joint venture and one of the world's largest alumina refineries at over 4 million tonnes a year — runs digesters, precipitators and calciners that are decades old. Next door, Rio Tinto's Yarwun refinery and Boyne Smelters Limited (BSL), Australia's largest aluminium smelter at over 500,000 tonnes annually across nearly 300 reduction cells, run on the same continuous, no-stop logic. On Curtis Island, Santos GLNG (7.8 Mtpa), Origin's APLNG (9 Mtpa) and Shell's QGC (8.5 Mtpa) chill gas to -161°C in trains full of compressors and heat exchangers that can only be opened when the train is down.

The defining feature of all of it is the outage survey window. When a calciner is pulled, a potline is rebuilt or a compressor train is opened, the maintenance crew has a fixed number of days — and sometimes hours — to remove worn components, install replacements within tolerance, and prove every step before the next one starts. Independent measurement is what turns "we think it fits" into "it fits, lift it". Without it, alignment is checked by tape and feeler gauge, fit-up problems surface when a crane is already holding a 40-tonne rotor, and as-built records are reconstructed from memory after restart.

Key point: A Gladstone shutdown survey is not a routine alignment job that happens to fall during a shut. The defining constraint is the window. Crew size, instrument selection and reporting cadence are all chosen to fit the schedule — a method that is "more accurate" but two hours slower can cost more than it saves when the next 14-day QAL outage is already booked.

Outage applications across Gladstone's plants

The same outage-survey discipline applies right across the Gladstone industrial cluster, but the equipment and tolerances change with the plant. The table below maps the major outage triggers ISS supports in the region.

What ties these together is that the survey is almost always on someone's critical path. A QAL calciner cannot be lowered onto its rollers until the seating geometry is verified. A Boyne potline cannot be re-energised until the pot tending crane runs true on its crane rail. An LNG compressor coupling cannot be made up until coaxiality is inside OEM tolerance. ISS plans each of these as scheduled survey tasks against the work list — not day-of call-outs — so the measurement is resourced rather than discovered.

Method and equipment inside the window

Outage survey kit has to be accurate, portable, fast to deploy and tolerant of heat, dust and salt air. ISS selects the instrument to the task and the schedule, not by default.

• Robotic total station and MultiStation — The Leica TS16 (±1 mm + 1.5 ppm, 1" angle) and the Leica MS60 MultiStation handle control, alignment and set-out. Automatic Target Recognition allows remote operation, keeping the surveyor out of exclusion zones around active lifts in a congested QAL or Boyne work area.
• 3D laser scanning — The Leica RTC360 captures dense point clouds at 2–6 mm at 50 m with a full setup under two minutes. On Curtis Island and at the refineries it is the fastest route to comprehensive as-built capture — pipework, structural steel and clearance envelopes recorded in hours, and the design basis for the next turnaround.
• Laser tracker — For the tightest work — compressor couplings, large bearing bores, machined calciner seating faces — a FARO laser tracker delivers ±0.015–0.025 mm at working range, the only tool that meets coaxiality and concentricity tolerances a total station cannot.
• Reflectorless and portable control — Quickly recovered control targets minimise set-up and teardown when the same network has to serve repeated measurement cycles across a multi-day shut.

Establishing a stable 3D control network around the work area before scaffolding and demolition congest it is the single biggest time-saver during the outage itself. ISS sets monumented or semi-permanent reference points one to two weeks ahead so that on hour zero the team is measuring, not building control.

Key point: Scanning and total-station work are complementary on a Gladstone shut. The RTC360 captures the whole condition for as-built and fit-check; the total station and tracker deliver the sub-millimetre numbers the mechanical team signs against. Using one where the other belongs either wastes window time or undershoots the tolerance.

Accuracy and standards

Outage-survey accuracy is matched to the engineering tolerance of the task, then verified against the relevant standard. All instruments are calibrated to ISO/IEC 17025 and measurements are traceable to national standards, with measurement-uncertainty statements supplied alongside alignment deliverables.

Where work touches structural or crane geometry, results are assessed against the relevant Australian Standard — AS 1418.18 for shiploader and pot tending crane runways, AS 4100 for steel structures — and against project or OEM tolerances where those are tighter than the code. CASA-compliant UAV inspection supports above-deck and roof condition capture where access is restricted during a shut. ISS works in MGA2020, AHD or your local plant datum so the data drops straight into your asset systems.

Why ISS for Gladstone shutdowns

ISS treats the outage window as the project constraint and engineers the survey around it. We lock scope four to six weeks out, establish control before the area is congested, and schedule attendance against the work list so measurement is ready the moment an area is — never before, never after. Critical results — anything a lift or a coupling decision depends on — are reported verbally and in writing on the spot; the formal report never holds up the outage.

Our surveyors carry current confined-space, working-at-heights and site-specific inductions for refining, smelting, LNG and port environments, and we carry redundant instrumentation so a single equipment failure never stops the line. Because we are independent of any OEM, we align and verify equipment from any manufacturer using consistent methodology — which matters across a Central Queensland survey market running everything from Outotec calciners to GE compressors. We mobilise directly to Gladstone, Boyne Island and Curtis Island from our Queensland operations, and we plan around hot-work restrictions, isolation procedures and the 24-hour shift patterns that major Gladstone turnarounds run.

For operators juggling several plants, ISS offers annual service agreements with priority scheduling and dedicated crew allocation — so the same team that knows your QAL calciners or your APLNG train layout is the team that turns up next shut, requiring less induction and spotting issues faster.

Frequently asked questions

How is a shutdown survey different from a normal alignment job in Gladstone?

They use the same instruments and tolerances, but the constraint is the window. A shutdown survey is planned, resourced and reported to fit a fixed outage schedule — at QAL, Boyne or Curtis Island — where every hour offline costs $50,000–200,000. The methodology is chosen to stay off the critical path, not just to hit the accuracy number.

Can ISS support an LNG turnaround on Curtis Island?

Yes. We provide compressor and heat-exchanger alignment, vessel and tank as-built, and jetty tie-in survey during GLNG, APLNG and QGC turnaround and inspection windows. Our crews hold the safety certifications these facilities require and plan survey activity around hot-work restrictions, isolation procedures and gas-plant access controls.

What accuracy do you achieve during a Gladstone outage?

Rotating-equipment alignment is typically ±0.3–1.0 mm with total station and MultiStation, and ±0.02–0.05 mm for coaxiality and concentricity using a FARO laser tracker. As-built scanning is 2–6 mm at 50 m with the RTC360. All instruments are ISO/IEC 17025 calibrated and uncertainty statements accompany alignment deliverables.

When should we book the survey before our shutdown?

Four to six weeks before the outage date. That allows scope definition against the work list, a pre-outage site visit to confirm access and line of sight, safety documentation, and crew scheduling. Late bookings risk unavailable crews, rushed methodology and lost window hours — the most common cause of survey-driven outage overrun is scope discovered too late, not measurement error.

Request a quote

If you have a calciner change-out, potline rebuild, compressor turnaround or shiploader reline coming up in Gladstone or Central Queensland, talk to ISS early — the difference between a survey that protects your window and one that derails it is planning, credentials and the right instrument for each task.

1. Call us on 0407 057 015 — discuss your outage with a surveyor who knows Gladstone's refineries, smelter, LNG trains and port.
2. Receive a detailed proposal — methodology mapped to your work list, safety plan, schedule and fixed-price quotation.
3. Mobilise to site — we coordinate access, inductions and attendance to integrate with your shutdown plan.

For a scoped, fixed-price shutdown survey that keeps your Gladstone outage on schedule, contact Industrial Spatial Solutions today.