Questions about the fire protection design codes for petrochemical enterprises?
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One of them states that: however, when the proportion of area occupied by equipment with the highest fire hazard category is less than 5%, and in the event of an accident, the fire cannot spread to other areas or the spread of fire can be prevented through fire prevention measures, it may be classified according to the equipment with a lower fire hazard category. So, must the distance between Class A storage tanks and ordinary storage tanks or structures, or other Class A storage tanks, also meet the fire separation requirements? Can the spacing be reduced? Please provide the basis.
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What this sentence means is that for the equipment with the highest fire risk, when it is arranged at a distance corresponding to the requirements for equipment with a lower fire risk nearby, even if a fire breaks out in it, it will not be sufficient for the fire to spread to the adjacent equipment. Therefore, a safety distance is still necessary, which should be set in accordance with the requirements for safety distance specified for equipment belonging to the lower fire hazard category.
Isn’t there a requirement for this, the distance between storage tanks?
The safety distance is determined based on the equipment with a lower fire hazard category; it is not that spacing is ignored. Besides, it can’t be that we get hit, right?
If the following conditions are met: the proportion of area occupied by equipment with the highest fire hazard category is less than 5%, and in the event of an accident, the fire cannot spread to other areas or the fire can be prevented from spreading through fire prevention measures, then it can be classified according to the equipment with a lower fire hazard category. Is hydrogen peroxide used as a fire dike or cofferdam?
Firstly, there was an error in selecting the standards; the categories A, B, and C of petroleum regulations refer to flammable liquids only, and do not include inorganic oxidizers. Secondly, neither the hydrogen peroxide tank nor the tanks for storing acids and alkalis are tanks for flammable liquids. Acids and alkalis are incompatible with each other and must be separated by a dike; there are no fire separation requirements between these tanks as pairs.