What is the stepped arrangement of tank groups? Fire dike issues for floating roof tank groups.
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This post was last edited by HaiChuanXiaoDangJia on 2020-5-18 at 15:41. 1. Experts, I have a small question: Combustible liquid tank assemblies must not be arranged in a stepped manner. What does stepped arrangement mean? Like the Olympic podiums? 2. “All flammable liquid storage tanks in construction projects shall be equipped with separate fire dikes or fire barriers.” The effective volume within the fire dike should not be less than the volume of the largest tank in the tank farm. When floating roof tank farms cannot meet this requirement, an emergency liquid storage tank should be installed to store the remaining volume; however, the effective volume within the fire dike of the tank farm should still be no less than 50% of the volume of the largest tank in the tank farm. How should the red-texted portion above be understood?
Is there anyone expert? Everyone, please help support it!
1. The stepped layout is adopted to account for the elevation differences in the site floor; it is used to reduce the amount of earthwork required for leveling the ground. In this layout, one area of the site is flat, while the entire site takes on a stepped shape
2. That is, the storage tank must be equipped with a fire dike; if there is an emergency liquid storage pool, the volume of the fire dike surrounding the tank cluster should be at least 50% of the volume of the largest tank in that cluster. The combined volume of the emergency liquid storage pool and the fire dike for the tank cluster needs to be sufficient to cover the volume of the largest tank
But what was the original intention behind doing this? What factors were taken into account to make it so complicated – fire dikes and accident ponds as well?
It refers to the situation where the site originally has a significant slope; in some cases, the height difference between the north and south or east and west sides can be 3–4 meters. If the entire facility were to be raised to the same height, the construction costs would be extremely high, and it would also be unnecessary. Instead, the elevation of a certain area of the site can be leveled, resulting in a stepped structure for the whole facility. Reduce the amount of ground leveling work required
If the area where the tank farm is located is large enough, it is of course possible to consider constructing a fire dike. When the area is limited and the capacity of the fire dike is insufficient, accident ponds can be installed in other areas as auxiliary facilities