5706.4.5.1.3 Vertical cylindrical tanks over 50,000 gallons (189 250 L) storing a combustible liquid.

For vertical cylindrical tanks over 50,000 gallons (189 250 L) storing a combustible liquid, the distance shall not be less than 1/2 the greater dimension of height or diameter of the tank, up to a maximum distance of 175 feet (53 340 mm).

5706.4.5.1.4 Rectangular tanks over 50,000 gallons (189 250 L) storing a combustible liquid.

For rectangular tanks over 50,000 gallons (189 250 L) storing a combustible liquid, the distance shall not be less than the total of the length and the width of the tank divided by 4, up to a maximum distance of 175 feet (53 340 mm).

5706.4.5.1.5 Tank construction.

Newly constructed tanks shall be in accordance with API 650. Repairs and alterations to existing tanks shall be in accordance with API 653.

5706.4.5.2 Distance between aboveground tanks.

The distance between any part of an aboveground storage tank and adjacent tanks shall be in accordance with FC Table 5706.4.5.2.

FC Table 5706.4.5.2
Distance Between Aboveground Storage Tanks

 

Adjacent Tank Capacity	Minimum Distance (feet)
50,000 gallons	3
Over 50,000 to 100,000 gallons	6
Over 100,000 to 200,000 gallons	12
Over 200,000 gallons	25

5706.4.5.3 Height of aboveground storage tanks.

The maximum height of aboveground flammable and combustible liquid storage tanks shall not exceed 40 feet (12 192 mm).

   Exception: Aboveground vertical cylindrical tanks storing combustible liquids shall not exceed 48 feet (14 630 mm) in height.

5706.4.5.4 Distance from aboveground tanks to buildings.

The distance between any part of an aboveground storage tank and buildings or structures used for housing of fire extinguishing equipment, central heating plant or electrical distribution equipment shall not be less than 50 feet (15 240 mm).