Ordering a Grain Cleaning Line from Overseas: Buyer Preparation

When an overseas order goes wrong, the expensive part is rarely the price of the machines. It is the things that could have been settled before manufacture and were instead discovered on site: a sample that did not represent the material, a height nobody measured, a power supply that was assumed, a drawing that was not aligned. The buyer's task before ordering is to give the manufacturer a clear and honest picture of the material and the site, in writing.

Send a real sample of your material

• A sample, not a description. Screen openings, air settings, chute angles and capacity all follow from the material: its shape, its bulk density, how much trash it carries and how wet it is.
• Send enough to test with, taken the way the material actually arrives and at the time of year when it is at its worst. A clean sample from a good day proves very little.
• Describe the impurities by type and by rough share, and give the peak intake rate at harvest rather than the annual average.
• State the moisture range across the season. Moisture changes blockage risk, air settings and the whole operating rhythm.
• Ask for the test result in writing: what was tried, what settings were used, and what came out of it.

Give site data that was measured, not estimated

• Usable height under beams, ducts and cable trays, not the building storey height.
• Floor or platform capacity, and whether the machine will stand on a slab, a steel platform or an upper floor.
• Door openings, turning space, and what lifting equipment can reach the installation point.
• Space for maintenance: screen changes, bearing access and clearing a boot.
• Drainage and washdown, because equipment areas get washed.

Give the utility data the design depends on

• Supply voltage, frequency and number of phases, and the capacity available at the point of connection.
• Where the incoming cable may enter, and where the control cabinet can stand, considering dust, moisture and operator sight lines.
• Compressed air, if the line needs it, and its quality.
• The local electrical code, and any local safety requirements that apply. Equipment and wiring have to meet these, and the manufacturer needs to know them during design rather than after delivery.

Align the drawings before manufacture

Ask for the general arrangement, the foundation drawing and the interface drawing, then check them against each other before production starts.

• Inlet and outlet elevations, positions and directions, on one drawing together with the machines on both sides.
• Chute routes, angles and inspection positions.
• Dust collection points, duct sizes, and where the hoods will sit.
• Anchor positions and base requirements for vibrating equipment.
• Whatever may be added later, such as a second grade split, extra aspiration or a bagging line, shown in reserved space on the drawing.

Verbal agreement on heights and interfaces is a common source of rework. Signed drawings are not.

Plan shipping, unloading and installation

• Agree the packing list and the shipping marks, and check each item against the drawing.
• Decide what arrives assembled and what is knocked down for shipping. A structure shipped in sections is easier to move and needs site assembly, so somebody has to be equipped to do it.
• Confirm the unloading equipment at your end, including capacity, reach and access to the unloading point, before the shipment arrives.
• Plan storage. Parts have to stay dry and undamaged between arrival and installation, and small items go missing.
• Confirm who installs, who supervises, and how many people are needed at each stage. Settle this before ordering, not with the equipment on the ground.

Documentation, commissioning and manuals

• Agree the language of manuals, drawings and nameplates, and the format they will be supplied in, before the order.
• Ask for the operation and maintenance manual, electrical diagrams, foundation and general arrangement drawings, the spare parts list and the wear parts list.
• Agree commissioning support: who attends, for which part of the work, and what they are expected to achieve.
• Agree what commissioning demonstrates and how it is measured. Put it in the contract technical agreement, with the capacity basis, the material to be used and the acceptance conditions.
• Agree a spares package for the start-up period: screens, screen cleaners, drive components and fasteners.
• Agree the warranty terms and the response route when something goes wrong, in writing, in the contract.

What makes a supplier relationship work

A manufacturer cannot design a line for a material and a site that have not been described to them. A useful thing an overseas buyer can do is to state the constraints plainly: low headroom, a weak floor, limited power, restricted access, high moisture, awkward material. These are design inputs, not embarrassments, and concealing them moves the cost to your own site.

In the other direction, a supplier who answers with a price and a delivery date and does not ask about the material, the site or the power supply, has not designed anything yet. Detailed questions before the order are the sign that the line is being worked out for your plant instead of assembled from a catalogue.

Preparation checklist

• Representative material sample sent, with test results agreed in writing.
• Impurity types and peak intake rate recorded.
• Measured net heights, floor capacity, door and lifting access documented.
• Power supply, incoming position, cabinet location and local code requirements confirmed.
• General arrangement, foundation and interface drawings checked and signed.
• Packing list, shipping marks, unloading equipment and storage plan agreed.
• Installation and commissioning responsibilities, including supervision, agreed.
• Manual language, document list, spare parts list and acceptance method written into the contract technical agreement.

All electrical connection and commissioning work has to be carried out by a licensed electrician, with the supply isolated, locked out and voltage verified, and to the local electrical code.