Penetrant Testing Dwell Time Calculator

Determine penetrant and developer dwell times based on material type, surface temperature, and defect type per ASTM E165

Input Parameters

Results

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Penetrant Dwell Time
min
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Developer Dwell Time
min
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Max Penetrant Dwell
min
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Temperature Note
Note: Dwell times per ASTM E165 Table 1 and ASME V Article 6, T-642. Temperature outside 40-125F requires qualified special procedure per T-653. Always perform test on practice specimen when possible.

Reference

Per ASTM E165 / ASME V Article 6: Standard temp range: 40-125F (5-52C) Min penetrant dwell: 5-20 min by material/defect Developer dwell: 10-60 min Below 50F: double dwell time Type II visible dye: add 25% to dwell