Aluminum coil inspection starts with the purchase specification.
Every accepted order defines what will be measured, how it will be checked and which records or samples control shipment release.
Inspection points for coated and anodized aluminum.
1. Specification review
Confirm alloy, temper, bare-metal or coated thickness basis, width, tolerance, coil ID and OD, coil weight, surface construction, color, gloss, fabrication route, packing and documents.
2. Sample and appearance approval
Use a RAL reference or approved physical control sample where appearance matters. The order should state the comparison method, lighting or instrument condition, gloss and agreed tolerance.
3. Production inspection
Depending on the product and order, checks may include dimensions, edge condition, flatness, dry-film thickness, color difference, gloss, cross-cut adhesion, T-bend, pencil hardness, anodic film thickness, sealing and visual surface limits.
4. Packing and shipment release
Confirm quantity, labels, protective film or interleaving, moisture barrier, eye orientation, pallet or cradle design, handling limits and the agreed inspection or shipping documents.
Important: tests and certificates are not implied by a product name. They become order requirements only after the method, sampling frequency and acceptance criteria are confirmed in writing.
Agree the inspection plan and records.
Use this purchasing checklist to define the checks, records and acceptance criteria required for your order.
On smaller screens, scroll the table horizontally.
| Material / stage | Checkpoints to agree | Record or acceptance basis to request |
|---|---|---|
| Base metal and dimensions | Alloy, temper, bare-metal or coated-thickness basis, width, tolerance and coil geometry. | Agree the measurement method, sampling and a record that identifies the batch or coil. |
| Painted coil | Front and back dry-film thickness, color, gloss, adhesion and forming checks selected for the order. | Identify the control sample, requested test method and acceptance limit before quotation. |
| Anodized sheet or coil | Anodic film, sealing, visible faces, finish direction and appearance for the selected process route. | Agree the finish sample and inspection method for sheet, coil or decorative processing separately. |
| Packing and release | Labels, quantity, protective film or interleaving, moisture protection, eye orientation and handling. | Request the agreed packing checklist, label details and any required loading photographs. |
Ask which records can be supplied and confirm them in the order. This checklist is not a test report and does not establish that any test has been performed or passed.
Prepare your inspection requirements