Start from the as-built drawings, not from a checklist
Walk the facility with a copy of the plumbing and HVAC layouts and mark every pipe run that carries grease-laden vapour, hot water, or condensate. Exhaust ducts and hood collars sit highest and collect the heaviest residue. Water supply and drain lines under the prep tables sit lowest and collect splatter and floor-wash runoff rather than kitchen grease — a different soil with a different cleaning answer. Gas lines and electrical conduit should be logged for exclusion, not cleaning: heat and moisture belong to the equipment's operating envelope, not to a routine that points a steam lance at a junction box.
For each run, record four facts: mounting height, reach path, material, and whether the run is fixed or demountable. Those four facts decide whether the surface is cleanable by the in-house team, cleanable by a contractor with access equipment, or only cleanable during shutdown.
Classify the runs into three access bands
A practical way to build the schedule is to sort the marked runs into three bands rather than trying to clean everything at the same interval.
- Band A — reachable from the floor. Supply and drain lines under benches, the visible sections of branch duct, and the exterior of the hood faces between filters. A single operator with a hand tool can work these during a normal off-shift.
- Band B — requires a platform or ladder. Trunk ducting above the line, risers in the corridor, and the underside of the canopy. This band needs two people, fall-protection equipment, and a defined floor zone beneath the work area.
- Band C — interior of the duct and fan section. Out of scope for in-house work. Contract this band and keep the certificates; the paperwork is what an insurer or a local authority asks for.
Writing the bands down makes the schedule defensible. You can state plainly which surfaces your team handles, which need an elevated-work permit, and which you buy in as a service.
Match the method to the soil
Grease on the outside of exhaust pipework is the difficult case. It is polymerised, sticky, and bonded to the surface after repeated heating cycles. Cold water with a detergent cloth moves loose splatter but does not release that bonded film, so the surface looks clean at the inspection and dirty six weeks later. Heat is what breaks the bond. High-temperature central kitchen cleaning equipment that produces steam at temperature and pressure softens the film so it can be wiped away, which is why kitchen operators working with steam report shorter scrub time on hoods and duct exteriors than they get with detergent alone.
Two practical points on steam for pipe work. First, use the dry-steam setting on vertical and overhead surfaces: it carries less free water, so the residue lifts without the run-off that turns a corridor into a slip hazard. Second, work with the slope of the pipe, from the high end toward the low end, so released grease travels toward your collection cloth rather than along the insulation toward a joint or an electrical box.
Water supply and drain lines are the opposite problem — mineral scale, biofilm in the warm sections, and splash marks. These respond to hot water with a food-safe detergent followed by a rinse, and they can be handled with the same central kitchen degreasing unit, switching to the wet-steam setting and a lower approach speed.
Set the interval from the inspection, not the calendar
Fixed intervals fail in kitchens because output varies. A site running one banquet shift a week and a site running continuous service accumulate grease at very different rates. Set a baseline inspection: once a month, photograph the same reference points on each band — the hood collar, one riser, one trunk section, one under-bench run — and record whether a fingertip wipe leaves a film. Move an interval up when the film becomes visible at the reference point, and move it down only after two consecutive clean inspections.
A useful distinction to write into the procedure: Band A follows a schedule, Band B follows an inspection trigger, Band C follows your contract term and the local regulation. That keeps the plan honest about what is being managed proactively and what is being managed by the contractor.
What to check before you buy the equipment
Facilities buying a fixed unit for kitchen cleaning tend to compare machines on output. For pipe work, the questions that actually decide the purchase are different.
- Can the unit sit on the kitchen floor without blocking the fire route, and can the hose reach your highest Band A point without an operator stretching over a hot surface?
- Is the electrical supply on the machine compatible with the circuits you have near the cooking line, or does the plan need a dedicated outlet installed first?
- Does the tank have enough capacity to finish one Band A section in a single off-shift without a refill cycle in the middle of the job?
- Is there a water inlet where the machine will be parked, or is the crew carrying jerrycans across a wet floor?
- Does the machine offer both dry and wet steam, or only one mode?
Answer these on the walk-through, then write the answers into the specification. If the answers point to a fixed unit with a tank sized for one shift, a Fixed Steam Cleaning Machine PowerDe HW02 is the configuration to evaluate against them: the product page lists it as a 220 V, 6 kW unit with dry- and wet-steam modes, an 80 L tank, and a tap-water inlet. Confirm the published steam temperature and pressure figures and the machine footprint directly on that product page before you write them into a specification, since the listing wording and the parameter block have not always matched on this site.
One boundary worth stating plainly in the procedure: the HW02 page documents vehicle, parking-facility, and engine-compartment use rather than a kitchen duty rating. If your specification requires evidence that a machine is rated for food-production environments, request that confirmation in writing from the manufacturer before the purchase, not after the trial.
Write the safety boundaries into the same document
Overhead cleaning with a pressurized lance creates three hazards that a cleaning procedure has to control explicitly. Hot residue falls, so anything below the work zone needs covering or clearing. The floor below becomes wet, so the zone needs signage and a defined drying time before service resumes. And the vapour close to the hood face is hot, so the operator needs gloves and forearm protection, not just the standard kitchen uniform. If your crew is not trained and equipped for elevated work, Band B does not belong in an in-house plan regardless of what the schedule says.
A short trial before the whole programme
Pick one 5-metre section of accessible trunk duct and one under-bench run, clean both with the machine you are considering, and time the work. Compare the photographs against the baseline inspection. That single trial answers the three questions a facility manager actually needs: whether the soil releases, how long a crew-hour of overhead pipe work takes, and whether the machine's tank and hose length suit your layout. Facilities that skip the trial usually discover all three answers in the worst possible week — during a shutdown, with a contractor on site and the kitchen closed.
If you want the cleaning scope reviewed against your layout rather than a generic checklist, customized steam cleaning equipment can be specified from the drawings and the access bands above; send the marked layouts with the reach heights and the tank and hose requirements you wrote down, and the specification conversation starts from facts instead of assumptions.
