A general approval shall be optional for the following devices:
1. Atmospheric tank.
2. Low pressure tank.
3. Special vessel.
4. Gas holder.
5. Spray booth or spray tunnel with any dimension greater than 3 feet.
6. Dip tank with more than 150-gallon capacity or more than 5 square feet of surface area.
7. Flow coat machine.
8. Drying oven.
9. Industrial oven or furnace not otherwise specified.
10. Industrial proceeding equipment not otherwise specified.
11. Automatic fire extinguishing system except automatic sprinkler system.