Temporary equipment on an operating asset is one of the most consistently undermanaged areas of operational assurance. It arrives on site, gets deployed, and can remain in use — and in some cases in place — long beyond its approved period if the register is not actively managed.
The reasons are understandable. Temporary equipment is, by definition, not permanent. It does not appear on the plant layout drawings. It is not part of the original design intent. And because it is temporary, there is often an implicit assumption that it will be gone before it becomes a problem. That assumption is where the gaps start.
What counts as temporary equipment
Temporary equipment covers a broader category than most registers acknowledge. The obvious entries are hired-in mechanical equipment — pumps, compressors, generators, pressure vessels used during turnaround or modification work. But a complete temporary equipment register must also capture:
Portable electrical equipment — power tools, extension leads, portable lighting, and any electrical equipment brought onto the asset that is not part of the permanent installation. Each item requires inspection before use and periodic recheck if it remains on site.
Temporary hoses and flexible connections — used in process, utility, and chemical service. Hoses in hydrocarbon or high-pressure service have defined pressure ratings, inspection requirements, and maximum service lives that are frequently not tracked against individual items.
Temporary structures and supports — scaffolding, temporary platforms, and any structural support installed in connection with maintenance or modification work. These have load ratings and inspection intervals that do not disappear because the structure is described as temporary.
Lifting equipment and accessories — chain blocks, slings, shackles, and spreader beams brought onto the asset by contractors. Each item requires a current thorough examination certificate, and the certificate must be specific to the item, not to the contractor's general lifting equipment inventory.
Breathing apparatus and gas detection equipment — hired or contractor-supplied equipment used for confined space entry or work in hazardous atmospheres. Calibration and service records must be available and current.
A register that covers only the large mechanical items is not a complete temporary equipment register. It is the visible part of the problem.
Why temporary equipment generates audit findings
Temporary equipment is a consistent source of findings in OPITO audits, HSE inspections, and major client assurance reviews. The findings follow a predictable pattern:
Equipment present on the asset with no register entry. An inspection finds a temporary pump, a set of hoses, or a piece of contractor electrical equipment that has been on site for weeks but has never been formally registered. Nobody deliberately omitted it — it arrived with a work pack, got deployed, and was never formally added to the register.
Inspection certificates expired. Equipment that was registered correctly on arrival has been on site long enough for its inspection certificate to lapse. The register shows the original certificate date but has not been updated to reflect that a recheck was required and either not done or not recorded.
Approved duration exceeded. Equipment registered for a specific job, with a defined period of use, is still on site after that period has ended. The job ran over, or the equipment was retained for a second job, without the approved duration being formally extended.
No removal record. Equipment that has left the asset has not been signed off the register. The register shows items as active that are no longer present, undermining confidence in every other entry.
Each of these findings is individually minor. In combination, they indicate a register that is not being actively managed — and an asset where the actual state of temporary equipment is unknown.
The safety consequences of poor temporary equipment management
Temporary equipment failures on operating assets are not theoretical. Temporary hoses in hydrocarbon service that exceed their rated pressure or service life are a source of releases. Hired-in electrical equipment without current inspection records introduces ignition risk in classified areas. Lifting equipment without valid thorough examination certificates creates the risk of failure under load. Temporary structures without current inspection sign-off may be carrying loads beyond their rated capacity.
None of these risks are created by malice or incompetence. They are created by a register that does not actively track the status of what is on site, combined with an operational tempo that makes it easy for individual items to fall through the gaps.
The HSE's guidance on temporary and portable equipment is clear: the duty to manage equipment safely does not reduce because the equipment is temporary. If anything, the management obligation is higher — because temporary equipment is outside the normal inspection and maintenance regime that covers the permanent plant.
What a well-managed temporary equipment register looks like
A temporary equipment register that functions as a genuine management tool rather than an arrival log has several characteristics that distinguish it from the common baseline:
Every item is registered before deployment, not after. The registration process is part of the work pack preparation, not a retrospective administrative task.
Each entry records the approved period of use, not just the arrival date. When equipment is registered for a specific job with a defined duration, the register tracks that duration and flags items approaching or exceeding their approved period.
Inspection and calibration requirements are tracked against individual items. The register does not just record that a certificate existed on arrival — it records when the next inspection is due and flags items where that date has been reached.
Removal is formally recorded. When equipment leaves the asset, the register entry is closed out with the date, the authorising person, and confirmation of the equipment's condition on removal.
The register is accessible in real time. An operations manager, a shift supervisor, or an auditor can see the current status of every item of temporary equipment on the asset without making phone calls or searching through paper files.
A practical self-assessment
These questions will give you an honest picture of where your temporary equipment register stands:
- Can you produce a complete list of all temporary equipment currently on the asset, including contractor-supplied items, within five minutes?
- Does the register record the approved duration for each item, and are items approaching or exceeding that duration flagged automatically?
- Are inspection and calibration certificates tracked against individual items, with due dates that trigger a recheck requirement?
- Is there a formal process for removing items from the register when equipment leaves the asset?
- In the last twelve months, has any audit or inspection found temporary equipment on site with no register entry or with expired certification?
If the honest answer to any of these involves uncertainty or a significant manual effort to establish, the register is not functioning as a management tool. It is functioning as a log — and the gap between those two things is where the risk sits.
Elisian's operational assurance platform includes a temporary equipment register that tracks every item from arrival to removal — with approved durations, inspection due dates, and automatic alerts built into the system rather than dependent on individual memory. The register is integrated with the permit to work system, so equipment deployed in connection with a specific permit is visible alongside the permit it supports. If you want to see how that works for your asset, get in touch with the Elisian team.