: A recent and critical update (Clause T-940) makes surface preparation mandatory. Surfaces must be clean, dry, and free of grease or weld spatter before the clock starts on an inspection.
(e.g., Jaeger J-1 or equivalent) to ensure near-distance visual acuity. 2. Examination Techniques asme section v article 9
under clause T-940. Surfaces must be clean, dry, and free from grease, weld spatter, or flux that could hide defects. Lighting Intensity : A recent and critical update (Clause T-940)