Walk the pipework route and map it by zone
Start with a marked-up layout of the pipes you intend to clean. Work through the runs above the cooking line, the risers, the wall runs, the store rooms, the plant rooms, the hood zone, and the ducting that shares the same ceiling space. Pipework that looks like one system is usually three or four different cleaning jobs. Access and risk change as a run crosses a wall, a floor or a room boundary.
For every section on the map record four columns. First the surface: bare stainless, painted steel, insulation and its jacketing, or a valve and bracket cluster. Then how reachable it is, whether overhead at arm height, behind a shelf, inside a crawl, or up a ladder in a riser. Then what sits below it: an open food bench, a rack of clean ware, packaging, an electrical box, a floor drain. Last, how long that section can be out of service without breaking service. That table, not a photograph of a dirty pipe, is the document the rest of the plan is built on.
Add one column for ownership. Kitchen pipework is often shared between the operator, the landlord and a mechanical contractor. A round that crosses all three needs written permission from each owner before a technician arrives with equipment.
Name the deposit section by section
"Dirty pipe" is not a specification. Over a range the exterior carries baked grease film. Further along the same run, airborne cooking oil has settled into a soft, tacky coat. On a cold section near an outside wall you will find condensate staining and dust that has stuck to that moisture. In a dry store the same pipe may carry little but dust. Each of these responds differently to heat, dwell time, water volume and physical wiping.
Write the deposit in plain words on the map row, with the date and the person who looked at it. A crew told "grease, thick, above the griddle" brings dwell time and containment. A crew told "loose dust and light staining in the store room" brings almost no water at all. Guessing wrong is what produces wet floors, damp electrical enclosures and long downtime instead of clean pipe.
Group the sections into cleaning windows
Deep cleaning pipework normally has to be cut into pieces, because a kitchen has windows that belong to other work. A practical schedule is a set of named windows. Overhead work needs the line shut with nothing open below it. Low-level work can run while one piece of equipment is off and the kitchen stays open. Store-room and cold-side work can run mid-afternoon. Riser and plant-room work follows the mechanical contractor's own shutdown.
Each window should state its start and finish conditions, not only its clock time. Write down what is covered and who holds the area key. Name the services that are isolated, and say what must be dry and signed off before service restarts. This is the difference between a round that finishes and a round that leaves a damp corner re-soiling itself within a week.
Decide what steam contributes and where it does not belong
High-temperature steam suits accessible pipe surfaces where the soil needs heat and a short dwell before it can be lifted. It also suits sections where only a little water is acceptable, because there is nowhere for run-off to go.
Site cleaning machines offer more than one mode for this reason. Drier steam leaves less moisture behind near fittings, seams, controls and electrical enclosures. Wetter steam or hot water carries more heat into a heavy buildup, but it also produces more liquid that has to be caught and removed. The category listing describes dry-steam, wet-steam and hot-water modes on several machines, so ask which modes the quoted unit switches between and how quickly.
Steam does not belong on the inside of a pipe. It also does not belong on anything the pipe or appliance maker says must not be washed. Exclude insulation that has to stay dry, and keep it away from a fuel or gas train, from bearings, seals and terminal boxes. The same goes for any section where run-off cannot be routed somewhere you control. Put those exclusions on the map as a visible column. An exclusion with an alternative, such as wiping, vacuuming or a contractor visit, is a usable plan. A blank is a risk someone will improvise on the night.
Fix access, containment and run-off before choosing the machine
Three site conditions decide the equipment more than any brochure does.
- Reach: how far the crew travels from a water and power point, and how narrow the aisles are on that route. Note whether the route passes a working cooking line, and whether the unit has to be pushed, carried or moved between zones.
- Containment: what is covered below each overhead section, where the lifted soil goes, which drains may receive kitchen run-off and which may not, and who removes the collected waste.
- Supply: the voltage and circuit available at each end of the route, and whether water is plumbed to that point or carried in. Also note how long a unit works before it needs refilling or recharging.
Mobile machines and plumbed arrangements trade these off differently. A mobile machine follows the route and absorbs the travel time. A fixed arrangement absorbs the installation once and then depends on hose reach. A round that crosses several rooms and floors is normally a mobile question. A single wash point used on a repeating cycle is normally a fixed question.
Put the utility questions in writing for the unit you quote
Ask for the installation sheet for the exact machine, not a general brochure. Ask for the working voltage and the circuit it needs, how it is connected, and the heating load. Ask for the water supply arrangement, the inlet type and fitting size, and the tank or supply volume. Ask for the footprint, and for the list of modes the unit switches between. Those rows decide whether your existing sockets, water points and aisles fit the machine, and they vary between models and variants.
Read two kinds of figure with care. A temperature printed on a page is normally a generator figure, not the temperature arriving at the surface you clean. What reaches the pipe depends on distance, nozzle, dwell and air movement. A tank volume is also a volume, not a working time, because how long a unit runs between refills depends on the mode and the operator. Treat any specification as a starting point to confirm on the machine you are shown.
Run one bounded section as a trial round
Before committing every pipe in the building, choose one representative section and clean it as the full round would be cleaned. Pick a run above the line with typical soil and typical overhead clearance. Define the area below it, then use the cover, containment and mode you intend to standardise on.
Before the trial starts, write down the two things that decide whether the round works. One is what counts as clean enough for that section. The other is the condition that stops the trial. The stop condition protects the building: water reaching an enclosure, run-off escaping the containment, or a service that cannot be re-secured inside the window.
After the trial record three timings you measured yourself: time on the section, time in preparation and clean-up, and time until the area was usable again. Measured times, not a vendor estimate, are what let you schedule the rest of the pipework realistically.
Make it a repeating round with a record
A deep clean that repeats is a document, not an event. One page per zone carries the section list and the deposit recorded for each section. It also carries the mode used, the exclusions with their fallback, and the containment and run-off route. Add the name of whoever signed the section off.
Frequency follows your own operation. Set it from your records: how fast that zone re-soils, what your own checks find, and what your hood and duct cleaning schedule already assumes. A generic interval borrowed from someone else's building is how pipework is either over-cleaned or left until it is heavy again.
Keep the record where an auditor, a new shift leader and a contractor can all find it. Once a zone has been done twice with a full record, the third round costs less. Any argument about what was covered is settled by the page rather than by memory.
What to send when you ask for a proposal
A kitchen pipework round is not a catalogue purchase, because the layout decides the answer. When you ask for a proposal, send the zone map with its reach and deposit columns, and send the exclusion list with its fallbacks. Add the utility readings for each end of the route and the measured times from your trial section.
A supplier who receives that can say which modes, which machine arrangement and which accessories fit your round. They can also put the answer in writing, so two proposals can be compared line by line. Where your building needs a different arrangement, customized steam cleaning equipment is scoped from exactly that kind of input.
If the same round also covers hoods, filters and cooking-equipment surfaces, commercial kitchen steam cleaning is where the kitchen-facing machines are listed. The same utility and containment information tells you whether one arrangement covers both jobs.
