![]() Note: Always take the diameter of the larger tank for separation distance calculation. ![]() ![]() The separation distances between the tanks storing Class-A & Class-B petroleum products will be 0.5D and for tanks storing Class-A & Class-C or Class-B & Class-C petroleum products will be 0.5D or 6 m (whichever is minimum will be considered).The separation distances between the tanks will be in accordance with Table-5 of OISD-standard-118 as they are the small installation (the aggregate capacity and diameter of the largest tank (T6) do not exceed 5000 m 3 and 9 m respectively.Therefore, there will be two rows of storage tanks in the dyke enclosure or Tank Farm. The storage capacity of the largest tank (T6) of the group does not exceed 50000 m 3. ![]() Hence, firewalls are not required for our case.
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