A brewery walk gives you the surface list. The supplier quotation gives you the machine. What is missing between those two documents is a written description of the work, and that gap is where the wrong machine gets bought. The items below are what a buyer has to put on paper, as a brief, before any bidder can price the job instead of guessing at it.
The surface list is the first page of the brief
Write every exterior you expect to be cleaned, one line per item, and keep the brewhouse and the packaging hall as separate lists. Vessel shells, the pipework running between them, frames and platforms, handrails, the outsides of the fillers and the packaging line, walls, floors and drains each behave differently, and a supplier answering for "equipment cleaning" as one phrase will answer for none of them.
Beside each line put the thing that makes that surface awkward: a shell that is insulated at the lower cone, a frame whose horizontal members carry a rim of dried deposit, a conveyor that only stops in a short window. Those notes are what a supplier uses to choose a delivery method, and they are worth more than any adjective about how dirty the plant is.
Name the deposit, not the appearance
Dried wort film, boiled-over residue, hops and yeast solids, sugar and protein films, lubricant carried out of the mill room into a traffic lane, and mineral scale from hard wash water are different problems wearing the same brown colour. Say which ones are present on each line of your list, and say how long they have been there. A film laid down since the last clean-down responds to a single pass; a film that has survived several weeks of heat and drying does not, and that difference changes the equipment class a supplier will propose.
If the site treats the interior of the vessels with its own cleaning-in-place routine, write that out of the brief in plain words. Exteriors only. Otherwise quotes come back covering the interior duty, and the comparison across bidders collapses.
What must not be touched, in writing
Every brewery has items a wash must stay away from, and the list belongs in the brief rather than in a conversation on the day. Insulated and lagged surfaces, painted signage and name plates, cable runs and junction boxes, bearing and seal areas, gasket faces, electrical cabinets, instrument panels, and open seams or lap joints that will hold water. Give each one a fallback: hand wipe, brush, or "not cleaned in this round". A supplier who receives that list will tell you where their method cannot reach, which is exactly the answer you want before a purchase rather than after.
The site conditions a machine has to live inside
Write down what the plant can offer at the point of use, because this decides whether a plumbed unit or a mobile unit is the honest recommendation. Power at the point where the work actually happens, the inlet fitting and thread size, hardness and quality of the feed water, how far the operator walks to refill or to a drain, where the run-off goes and whether that route is a waste stream the site already controls, and whether a hose or cable would have to cross a wet aisle to reach the job.
Ask each bidder to answer these lines in writing and to state which figures belong to the machine they are quoting. A specification sheet for one unit is not a specification for another, and a rating lifted from a catalogue page tells you nothing about a machine that will be plumbed into your brewhouse. Where a page shows a temperature or pressure with unusual notation, treat it as a field to confirm, not as a settled number.
How the work reaches the surfaces
State the reach problem in the brief. A plumbed unit beside a wash bay is cheap to run and cannot follow a job that moves; a cart follows the job and gives that flexibility back as extra handling and refill walking. Shells high on a platform, machinery set in a row, and irregular items such as racks, pallets and yard equipment are three different reach problems, and each one is a separate line in the quotation. If you hide them, you get one price for a whole brewery and no way to tell which part of it is wrong.
The production calendar belongs here too. Say which windows exist, how long they are, and who releases the machine back to production. A method that cannot finish inside the window is not a method, whatever it does to a test panel.
One bounded trial, run before the order is signed
Ask for a single patch on one of your own surfaces, chosen because it is representative and awkward rather than because it is easy. Mark the boundary with tape. Write the acceptance condition before the pass starts, and inspect the patch only after it has dried, using a reviewer who took no part in working it. Record water used, time spent, what was moved out of the way, and what the run-off route looked like afterwards. A trial judged while the surface is still wet settles nothing, and a trial judged by the operator who worked it settles less.
Send that record, with photographs, to every bidder in the form it was written. It is the fastest way to find out whether a supplier is answering your brewery or reciting a brochure. For anything the standard range does not fit, a written customized steam cleaning equipment enquiry built from the trial record is the cheapest next step.
What each supplier has to answer on paper
Which surfaces on the list the machine can reach without extra access work, and where it stops. What site services it needs at the point of use, in the notation your plant uses. What the quoted figures apply to, and whether they hold after a full shift of use. Where the run-off goes. What the machine cannot do that the brewery still needs done. Give every bidder the same list and the answers start to line up.
A brief written this way is also the document your own team works from later, so write it once and send it to suppliers and staff unchanged. The brewery steam cleaning equipment range is what you price against that brief, and brewery equipment steam cleaning is the category to read before the first quotation arrives. Your own surface list, calendar and drain routes decide whether any of it fits.
