What are the special requirements for storing methanol tanks underground?
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1. At the pharmaceutical factory, the methanol raw material storage tanks and the hazardous chemicals warehouse are located next to each other. Considering the issue of fire separation between them, it is worth considering whether the storage tanks can be placed in the underground area outside the building; this would allow the required fire separation distance to be reduced by 50%. Are there any special requirements if the tanks are placed underground? (The methanol tank has a capacity of 30 tons.)
The underground tank is a buried tank; its exterior is coated with asphalt paint and glass fiber cloth. There are two manholes on the top of the tank – one for personnel to enter and exit, and the other for installing instruments, vent valves, and pipes. The feed pipe extends to a distance of 20 centimeters from the bottom of the tank. The tank is connected to the underground grounding network in two places