NOTES:\r\nAbovementioned distances are measured from the outside edge\r\nof an aboveground tank or from the filling connection or the relief valve of an\r\nunderground or mounded tank.

6.11.\r\nSeparation distances may be reduced by the provision of a\r\nfire wall in accordance with the following rules:

The minimum distance\r\nbetween the tank and the fire wall is 1.5 m.

Where a fire wall is\r\nconstructed, the separation distance shall be calculated by adopting the\r\nfollowing formula:

A = A + B (m)

Where:

D: minimum separation\r\ndistance indicated in Table 1;

A: distance measured\r\nhorizontally from the tank to the gable of the fire wall;

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

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Figure\r\n1. Separation distance from a tank with a fire wall

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

6.13.\r\nLPG tanks and oxygen containers must be sited according to\r\nthe separation distances in Table 2.

Table\r\n2 - Separation distances between LPG tanks and liquid oxygen containers

Capacity of liquid oxygen container (m³)

Capacity of LPG tank (m³)

Separation distance (m)

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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

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...

30

5.0 m³ or above

45

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

Table\r\n3 – 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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Hose\r\n streams and delivery hoses

6

15

Fixed\r\n monitor nozzles

6

7.6

Fixed\r\n water spray

9

7.6

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9

7.6

6.15.\r\nSeparation distances from LPG filling facilities to adjacent buildings\r\nand to LPG tanks are provided for in Table 4.

Table\r\n4 - Separation distances from LPG filling facilities to adjacent buildings and\r\nto LPG tanks

Adjacent buildings

Separation distance (m)

Out-of-control\r\n area, fixed sources of ignition, road and rail points of LPG transfer

15

Aboveground\r\n tank of less than 9 m³

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...

Aboveground\r\n tank of 9 m³ to 140 m³

10

Aboveground\r\n tank of 140 m³ or above

15

Tank\r\n valves and appurtenances above the grade of underground tanks or mounded\r\n tanks of:

Up\r\n to 2.5 m³

5

 2.5\r\n m³ to 140 m³

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140\r\n m³ to 350 m³

11

350\r\n m³ or above

15

6.16.\r\nSeparation distances between points of LPG transfer by road\r\nor rail tankers and adjacent buildings are provided for in Table 5.  

Table\r\n5 - Separation distances between points of LPG transfer and adjacent buildings

Adjacent buildings

Separation distance (m)

Homes\r\n or buildings with fire walls

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...

Homes\r\n or buildings with other than fire walls

7.6

Building\r\n wall openings or pits at or below the level of the point of transfer

7.6

Line\r\n of adjoining property that can be built upon

7.6

Outdoor\r\n places of public assembly including athletic fields, and play-grounds

15

Public\r\n streets

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Mainline\r\n railroad track centerlines

7.6

Aboveground\r\n LPG tanks of 16 m³ to 25 m³

3

Aboveground\r\n LPG tanks of 25 m³ to 125 m³

6

Aboveground\r\n LPG tanks of 125 m³ or above

9

6.17.\r\nUnderground tanks must be protected from external loads on\r\nthe tank shell, including loads from cars and other vehicles, etc.

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6.19.\r\nVaporizing equipment of any types shall not be installed\r\nwithin the minimum separation distance of 1.5 m from the outer edge of the\r\ntank. Vaporizing equipment must be installed\r\nwithin a suitable electrical safety zone or to keep a regulated distance to the\r\nfixed ignition source.

7.\r\nCorrosion control

7.1.\r\nEach tank shall be protected against corrosion.\r\nProtective coatings must be tested for protection of tanks\r\nfrom the effects of corrosion at periodical intervals not exceeding 2 years.

7.2.\r\nFireproofing coverings shall not be used to replace or\r\nsupport the fire water system, unless these fireproofing coverings are designed\r\nto allow the inspection of inner sides of tanks and measurement of thickness of\r\nthe tank shell, and approved by competent authorities.

7.3.\r\nFireproofting covering of a tank shall be tested at\r\nperiodical intervals not exceeding 05 years which are same as those for testing\r\nfor wall and shell thickness as well as inspection of inner side of a tank.

8. Labeling

A label must indicate\r\nthe following information:

- Name of\r\nmanufacturer;

- Date of\r\nmanufacture;

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- Maximum allowable\r\noperating pressure;

- Minimum allowable\r\noperating pressure;

- Minimum operating\r\ntemperature;

- Water capacity;

- Inspecting agency.

LIST\r\nOF REFERENCED DOCUMENTS

1) NFPA\r\n58 : 2001 Liquefied Petroleum Gas Code.

2) AS\r\n1596 - 1989 LP Gas - Storage\r\nand Handling / Australian Standard.

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