Determination of the height of fire dikes and barriers in the tank farm area
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According to the current design fire protection codes for petrochemical enterprises (GB50160-92-1999 version) and the design codes for oil depots (GB50074-2002), the height of the partition dike is 200–300 MM lower than that of the fire dike. However, according to the current design codes for fire dikes in tank farms (GB50351-2005), the height of the partition dike should be between 0.5 and 0.8 meters. In both cases, its height is lower than that of the previous standards. It is particularly important to determine the appropriate height of the partition dike when designing tank farms, especially those for storing crude oil; reducing this height is advantageous from both the perspective of construction workload and piping arrangements. I hope everyone will discuss it.
How is the specific height of a fire dike calculated? Is it calculated based on the capacity of the fire dike?
The height of the fire dike should be determined based on its effective capacity inside, and the top surface of the dike should be 0.2 meters above the calculated liquid level. If the dike is taller than the specified height, its effective capacity inside should be increased accordingly. Effective capacity within the fire dike: For oil tanks with fixed roofs, it should not be less than the capacity of the largest oil tank in the tank group ； For floating roof tanks or internal floating roof tanks, it should be no less than half of the capacity of the largest tank in the tank farm.
GB50160 is a petrochemical standard that has been upgraded to a national standard, while GB50351 is likely a CNPC standard that has been raised to the level of a national standard. Various standards can conflict with each other in practical design work; for example, GB50160 and GB50074 may be at odds. To address such conflicts, it is best to follow the CNPC standards when designing projects related to CNPC, rely on petrochemical standards for projects related to Sinopec, and focus on GB50074 for oil depot projects (for instance, if an oil depot is part of a petrochemical project, its enclosure is required to be solid). It is also possible to seek advice from the client; otherwise, one can only provide suggestions rather than carry out actual design work.
In my opinion, the height of the dike doesn’t matter; it merely serves a basic protective function! ! ! It is recommended to use the latest standards; a lower base value is effective and cost-effective! ! ! ! :handshake :victory:
There are design specifications for fire dikes; it is recommended that everyone take a look
Personally, I believe that, as long as it meets the regulatory requirements, a fire dike should be as high as possible in order to reduce the scope of impact in the event of a disaster.
The height of the dike is specified, and its internal volume must also meet the requirements!
First, it is necessary to determine what kind of storage area this is. For spherical tank storage areas, the height of the fire dike is generally 1 meter, while the height of the separation dike is 700 mm. In the case of liquid storage areas at normal pressure, the height of the fire dike is determined by the storage capacity of the largest tank in that area, and it ranges between 1 and 2.2 meters. These requirements are clearly specified in the fire protection standards for petrochemical enterprises, GB50160
It is recommended that the height of the fire dike be below 1.6 meters; if it is higher than 1.6 meters, it will affect the horizontal line of sight of consumers. The regulations set out in the Building Code are quite reasonable