Estimate preliminary cleaner, penetrant and developer requirements from inspection area, application coverage and waste allowance.
The theoretical product quantity is based on the total inspection area and the specified product coverage rate.
The calculator then applies the selected application passes and waste allowance:
The result is a preliminary planning quantity rather than a guaranteed consumption figure.
The calculator estimates three common consumable categories used during liquid penetrant inspection: cleaner or remover, penetrant and developer.
The estimate accounts for the inspection area, number of parts, application passes, stated coverage rates and a practical allowance for application losses.
Coverage rates can vary significantly between products and application methods. Aerosol application, bulk liquid application and other methods can have different practical consumption rates.
For accurate planning, enter the coverage information supplied for the specific product being used rather than relying on a generic value.
The waste allowance accounts for material that does not become useful inspection coverage. Examples include overspray, transfer losses, wiping losses, residual material in containers and application inefficiencies.
The appropriate allowance depends on the inspection environment and application method.
For multiple identical parts, enter the inspection area for one part and increase the number of parts. The calculator multiplies the effective area by the part count and application passes before estimating consumables.
The calculator can convert estimated litres into an approximate number of containers by dividing the required volume by the usable container size and rounding upward.
Actual usable contents can be lower than nominal package volume because of application losses and residual product.
Consumable planning does not define the penetrant inspection process. Surface preparation, application, dwell time, removal, development, lighting, interpretation and acceptance criteria should follow the applicable procedure and product instructions.
The calculator is intended for preliminary material planning only.
This tool does not determine whether a part passes or fails penetrant inspection. It does not calculate indication sensitivity, dwell time, acceptance criteria or inspection validity.
Actual product usage should be verified against the manufacturer's technical data and the applicable liquid penetrant testing procedure.
What does this dye penetrant coverage calculator estimate? It estimates preliminary cleaner, penetrant and developer quantities from inspection area, application passes, coverage rates and waste allowance.
Why is a waste allowance needed? Practical consumption can exceed theoretical coverage because of overspray, wiping, evaporation, transfer losses and residual product.
Can I calculate aerosol can quantities? Yes. Enter the usable volume represented by one container and the calculator estimates how many containers are required.
Should I use the generic coverage rates shown here? For planning examples they are useful, but actual purchasing should use the coverage information supplied for the specific product and application method.
Does the result include all inspection time and consumables? No. It estimates the three entered consumable categories. Other inspection materials, equipment and labor are not included.
Does this replace an approved penetrant testing procedure? No. The applicable procedure, product instructions and inspection standard control the actual inspection process.