Selecting flammable and explosive solvents (such as acetone, isopropanol, gasoline, certain hydrocarbon solvents, etc.) for cleaning is a high-risk operation. A systematic safety protection framework centered on **"Explosion Prevention, Fire Prevention, Anti-Static, and Poisoning Prevention"** must be established.

The following are critical protective measures that must be strictly adhered to, summarized by logical level:

I. Core Protection System: Engineering Controls and Equipment

This is the most fundamental and prioritized line of defense.

1. Explosion Prevention and Ventilation

   · Forced Ventilation: Operations must be conducted inside an explosion-proof fume hood or a closed-loop cleaning machine, ensuring air circulation to keep solvent vapor concentration far below the Lower Explosive Limit (LEL).

   · Environmental Monitoring: Install combustible gas concentration alarms, set alarm values (usually 10%-25% of the LEL), and ensure interlock with the ventilation system.

   · Area Classification: Clearly classify the operating area as a hazardous (explosion-proof) zone, prohibit open flames and heat sources, and set clear warning signs.