Name the line, not the machine category
An enquiry that names only a machine category, with no line described, hands the supplier nothing to price and nothing to refuse. Conveyor is a family, not a duty. The brief has to state which family and which line: a stainless belt line carrying food product, a slat or chain conveyor in a packaging hall, a roller bed inside a warehouse, a chip conveyor standing beside a machining centre, an overhead hanger line, or a return conveyor under a filling machine. Each behaves differently under heat and water, and each fails in a different place.
Then write the duty as a sentence a shift supervisor would recognise: which line, which shift, how often, who holds the lance, and what must be true before the line is released back into service. Record what triggered the enquiry as well. A hygiene audit finding, a slip complaint on the floor beneath the line, product being held at release, or a conveyor that simply cannot be cleaned inside the shutdown window are all different problems, and the trigger becomes the acceptance test later. A supplier who knows the trigger can propose a method instead of reading a catalogue back to you. That is also the sentence that decides whether the duty belongs to the fixed end of the industrial steam cleaning equipment range or to a mobile unit, so write it before the category is chosen rather than after.
Split the conveyor into zones before asking for a specification
The most expensive omission in a brief is treating a conveyor as one surface. A line is at least four jobs, and the brief needs an entry for each of them.
The product-contact zone is the belt, slat, chain, flight or pan, together with side guides and the product-facing surfaces of the frame. Where product touches the line, say so plainly and ask what the supplier can put in writing about that duty. A cleaning machine whose own page describes vehicle cleaning is not food-duty equipment until someone states the basis for that claim, and the brief is the document that asks for it.
The structural zone is frame, guards, panels, brackets, and the painted or stainless surfaces away from the product. The mechanical zone is rollers, bearings, drive units, gearboxes, sprockets and tensioners, where some grease is meant to be there and water is not. The surrounding zone is the floor, plinth and drainage under and beside the line, which is where most of the cleaning time and most of the slip risk are found. Naming the zones also makes the useful question answerable: which mode of a steam degreasing equipment package is intended for which zone, and in what order. A dried film on a belt and a fresh lubricant smear on a guide rail are not the same instruction to the same operator.
Describe the deposit by type and age, not by how dirty it looks
"Grease" is not a specification. Sugar syrup, starch, protein, frying fat, cutting oil, way oil, mist film, hydraulic bleed, graphite lubricant, dust bound with oil, and swarf fines stuck into all of those each need a different approach. Age matters more than area. A film laid down this shift is one job; the same film baked on over a season and rebuilt by repeated heat is another. On a continuously running line the deposit near the drive end is usually older and thicker than the deposit at the tail, and a brief that averages the whole conveyor into one condition will be answered with one method that suits neither end.
Write the deposit list zone by zone, and attach what has already been tried and what it failed to do. The detergent used, the water temperature, the dwell time and the result are worth more to a supplier than any adjective about how bad the line looks. If the previous method left residue at lap seams, splice joints, under guides or at the frame-to-floor junction, name those positions, because they are exactly where the next method will be judged.
State what must not be sprayed in the same detail as what must be cleaned
On a conveyor the exclusions are not a footnote. They decide the nozzle, the technique and how much water is allowed near the line. Bearing and gearbox positions, motor cooling openings, terminal and junction boxes, cable and pendant runs, encoder and sensor faces, limit switches, pneumatic fittings, belt splice seams, and every label, graduation and safety marking belong in the brief as protected or excluded items. Where the conveyor builder's own manual restricts washing, that restriction outranks the buyer's cleaning preference, and the brief should quote it rather than paraphrase it.
Then state what the line can physically do during cleaning. Can it be stopped, drained, released for as long as the cleaning needs, and left wet? Can the belt be slackened or the frame washed separately, or is in-place washing the only option? If the only window is a short one after the last shift, say so, because a method that relies on long dwell, or that needs the area closed while the floor is wet, will not survive that window no matter how well it cleans in a demonstration.
Record the utilities at the conveyor's own position
A great deal of cleaning equipment is bought for a factory that cannot connect it. The brief should record what is present at the position where cleaning would be done, not what exists somewhere else on site: the supply voltage and the circuit serving that area, whether piped water reaches it and what inlet fitting is fitted, whether there is a drain or whether run-off has to be collected and removed, how far the operator has to walk to refill, how much clear floor the unit is allowed to occupy, and the doors, racking and guarding the unit has to pass on the way in.
This is where a specification sheet has to be read model by model. As an example of the level of detail the brief should demand for the exact machine quoted, the Fixed Steam Cleaning Machine PowerDe HW02 page records 220 V working voltage, 6 kW heating power, an 80 L stainless-steel tank, and a tap-water inlet with a 4-point internal-tooth joint, 1/2 inch. Those are that page's rows for that machine. They are not transferable to a hand-pushed or driving-style unit, and the brief should require every figure to be answered for the model actually on the quotation, including overall size with handles and projections, since a footprint on a drawing and a footprint in a narrow aisle between a conveyor and a rack are not the same thing.
Run-off deserves its own line in the brief. Steam and hot-water cleaning on a conveyor produce a wet floor plus a stream carrying loosened oil, product fat, coolant residue and fine swarf. Where that water goes, and who removes the collected sludge, is the part of a conveyor cleaning project that is most often left out of the estimate and cannot be left out of the installation.
Define the finish the buyer will sign off
A brief without an acceptance standard produces an installation that the two sides describe differently forever. Set the finish per surface class: what a belt face must look like, what a frame and guard must look like, what a lap seam, splice or guide fixing must look like, and what released to production means in the zone where product is handled. Say who signs. Say how the line is confirmed dry enough to walk beside and safe to restart, because standing water under a conveyor is one hazard and moisture at an electrical position is another.
Put the same written question list in front of every supplier and compare the answers rather than the layout of the documents. Which specification rows apply to this duty and where they appear in the datasheet; which protections are fitted and what they do not cover; which mode is proposed for the oldest deposit, and what is proposed near a cable entry; what is excluded from the price; what maintenance interval and which wear items follow; and what the supplier needs from the buyer before confirming suitability. Where the duty does not match a standard configuration, that is a configuration conversation and not a catalogue order, which is the point at which customized steam cleaning equipment should be raised, because an honest no is far cheaper before a purchase order than after one.
Set the trial in the brief, with the evidence declared beforehand
A conveyor is long, so an unbounded trial becomes an expensive week of demonstration that proves nothing comparable. Agree one length of line, one trained operator, one window, and one area chosen precisely because it is difficult. Declare the evidence to be collected before the trial begins: photographs of the same positions before and after with the area identifiable in the frame, a reading of the utilities actually present at that position, the elapsed time from set-up to signed release, the quantity of run-off produced, and the condition of every protected item afterwards. Name the joint, splice or finned surface you expect to fail; a trial that hides the hard spot tells you nothing you did not already believe.
Then decide what the trial must prove before it can be repeated at all: that the deposit comes off inside the window that exists, that the exclusions came through intact, that the floor is usable afterwards, and that the interval between cleans gets longer rather than shorter. Cleaning-time and cost questions on a conveyor line are answered by that record and by nothing else, and the brief is what makes one supplier's record comparable with another's.
What a complete brief settles
Before the first enquiry leaves the building, four things should be closed. The scope: which conveyor, which zones in, which zones out, written with the same care as the exclusions. The deposit: type, age and location, with the history of failed attempts attached as evidence rather than as complaint. The site: voltage, water, drainage, access, footprint and the cleaning window, all read from the position where the work happens and matched to the quoted model's own rows. The acceptance finish: the standard per surface class, the named signatory, and the drying and restart condition.
A buyer who can supply those four receives comparable quotations and a trial with a defined outcome. A buyer who cannot will collect confident assurances from several suppliers and still be standing in front of the same conveyor at the end of the shutdown. For a factory cleaning a conveyor line, the brief is the cheapest part of the purchase and the one that every later argument refers back to.
