Recommended minimum penetrant and developer dwell times by material/discontinuity type, and the process temperature, pressure and rinse-time limits
◉ ASTM E165-02 · NOT A REGULATORY SUBMISSION TOOL
⚠ Older edition, and a process guide with no accept/reject criteria. Source: ASTM E165-02, read from its own text. The current edition is E165/E165M-23, five revisions ahead of this copy (02→09→12→18→23) — process parameters may well have changed; confirm before relying on this for a live procedure. E165 states plainly that it "does not indicate or suggest criteria for evaluation of the indications obtained" (§1.3) — interpreting what's found is a matter for a separate code, specification, or agreement, not this standard. §1.4 also states inch-pound values are the standard ones in this edition; SI values shown here are the edition's own "for information only" conversions.
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1. Recommended Minimum Dwell Times (Table 2)
Table applies for a temperature range of 50–125°F (10–52°C). For 40–50°F (4.4–10°C), a minimum dwell time of 20 minutes is recommended instead of the table value. Dwell time shall not exceed the maximum recommended by the penetrant manufacturer; the table is a guide, not a substitute for that.