NOTES: Abovementioned distances are measured from the outside edge of an aboveground tank or from the filling connection or the relief valve of an underground or mounded tank.

6.11. Separation distances may be reduced by the provision of a fire wall in accordance with the following rules:

The minimum distance between the tank and the fire wall is 1.5 m.

Where a fire wall is constructed, the separation distance shall be calculated by adopting the following formula:

A = A + B (m)

Where:

D: minimum separation distance indicated in Table 1;

A: distance measured horizontally from the tank to the gable of the fire wall;

B: distance measured horizontally from the above-determined gable of the fire wall to the adjacent structure (housing or office building, etc.)

...

...

...

Figure 1. Separation distance from a tank with a fire wall

6.12. Fire walls are normally used on one side of a tank or tank grouping.  Fire walls should not be used on more than two sides of tank grouping or where the ventilation would be impaired.

6.13. LPG tanks and oxygen containers must be sited according to the separation distances in Table 2.

Table 2 - Separation distances between LPG tanks and liquid oxygen containers

Capacity of liquid oxygen container (m³)

Capacity of LPG tank (m³)

Separation distance (m)

...

...

...

Up to 2.5 m³

6

 From 2.5 m³ to 9.0 m³

7,5

9.0 m³ or above

15

125 m³ or above

...

...

...

30

5.0 m³ or above

45

The adjacent ends of the cylindrical tanks designed for horizontal installation shall be separated from each other in a row; they must be installed parallel with ends in line and must not be directed toward housing or service buildings. Aboveground tanks shall be installed in groups. The number of tanks in one group depends on the fire protection system and is provided for in Table 3.

Table 3 – Maximum number of aboveground tanks in one group

Fire protection provided by

Maximum number of tanks in one group (tanks)

Minimum separation distances between groups (m)

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..