1. In-tank operations must be licensed. If the operation is interrupted for a long time, the in-tank operation permit shall be reissued.
2. The sample is sampled and analyzed 30 minutes before entering the tank for operation, and the oxygen content is between 18-23 percent (volume ratio).
3. Wear personal protective equipment when entering the tank to remove toxic and corrosive residues.
4. When scaffolding and lifting devices need to be built, they must be firm and reliable. During operation, it is strictly forbidden to throw materials and tools inside and outside to ensure safe operation.
5. The lighting in the tank should use explosion-proof lamps with a voltage not exceeding 24 volts.
6. When hot work is required in the tank, a hot work certificate must be obtained.
7. A guardian must be set up in the operation of the tank farm, and there must be reliable contact measures.
8. After completion, maintenance personnel and guardians should jointly inspect the inside and outside of the storage tank. After confirmation, the guardian shall sign the certificate of operation inside the tank before closing the manhole.
9. After the pressure test, it must be connected to the atmosphere to prevent vacuum
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