Estimate magnetic particle inspection surface coverage and preliminary consumable requirements for parts, batches and repeated inspection passes.
| Item | Calculation Basis | Estimated Quantity |
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The calculator first converts the entered surface area into square metres, then multiplies it by the number of parts and inspection passes.
Consumable estimates are then calculated from the effective inspection area and the entered product coverage rate.
Finally, the selected waste allowance is added to the theoretical quantity.
Magnetic particle inspection is used to locate surface and near-surface discontinuities in suitable ferromagnetic materials. Coverage planning considers the surface that must be inspected and the way the inspection is performed.
For batch work, the total area can become substantially larger than the area of an individual part. Multiple inspection passes can also increase the amount of surface treatment or consumable application required.
Magnetic particle inspection may involve different magnetization arrangements or coverage directions depending on the component, equipment and approved inspection procedure.
This calculator treats each entered pass as an additional coverage requirement. It does not prescribe the number or direction of magnetization passes required for a particular component.
The coverage rates in the calculator are user inputs rather than fixed industry requirements. Different products and application methods can have very different practical consumption rates.
For purchasing or production planning, use the manufacturer's technical information or measured shop consumption wherever available.
Actual consumable use can exceed theoretical coverage because of spray losses, overspray, wiping, drainage, residual material, equipment losses and operator technique.
The waste allowance provides a simple way to include an additional planning margin. It should be adjusted to suit the actual inspection environment.
For repeated inspection of identical components, enter the inspection area for one part and the number of parts in the batch.
If more than one coverage pass is needed, the calculator multiplies the batch area by the entered number of passes.
The calculator divides the estimated liquid requirement by the entered container size and rounds upward to provide a practical whole-container estimate.
Nominal package size does not necessarily equal usable inspection consumption. Residual product and application losses can affect actual usage.
Those requirements depend on the applicable inspection procedure, material, equipment, governing standard and component-specific requirements.
What does this MPI coverage calculator estimate? It estimates inspection surface area and preliminary consumable quantities from the entered area, number of parts, passes, coverage rates and waste allowance.
Why are multiple passes included? Multiple passes can represent additional coverage requirements. The calculator does not determine how many magnetization directions are required.
Why include a waste allowance? Actual consumption can exceed theoretical coverage because of spray losses, wiping, residual material and application conditions.
Can I use this for a production batch? Yes. Enter the surface area of one part and the number of parts to estimate total batch coverage.
Are the coverage rates fixed industry values? No. Coverage rates are user inputs and should preferably come from the specific product's technical information or measured consumption.
Does the calculator determine whether an MPI inspection passes? No. It only estimates coverage and consumables. Inspection technique and acceptance criteria must follow the applicable procedure and standard.