§ 59-9. Installation of storage tanks for oil fuel.

A. 

Materials and construction of tanks. Tanks shall be constructed of galvanized steel, open-hearth steel or wrought iron of a minimum gauge (U. S. Standard) a thickness depending upon the capacity as given below.

	1	to	285	gal.	--	14 gauge
	286	to	560	gal.	--	12 gauge
	561	to	1,100	gal.	--	10 gauge
	1,101	to	4,000	gal.	--	3-16 in.
	4,001	to	12,000	gal.	--	1- 4 in.

B. 

For tanks of 1,000 gallons and more a tolerance of 10% in capacity may be allowed.

C. 

All joints shall be riveted and caulked, brazed, welded or made tight by some equally satisfactory process. Tanks shall be tight and sufficiently strong to bear without injury the most severe strains to which they may be subjected in practice. Shells of tanks shall be properly reinforced where connections are made. All connections shall be made through the top of the tank above the liquid level except in tanks having a capacity of 275 gallons and less where one connection, not larger than one-inch iron pipe size, may be made in the bottom of the tank. Inside storage or gravity tanks of 275 gallons' capacity and less may be provided with an additional one-inch opening in the bottom of the tank for an approved key stem gate valve to aid in cleaning the tanks.

D. 

Underground tanks shall be thoroughly coated on the outside with tar, asphaltum or other suitable rust-resisting material dependent upon the condition of the soil in which they are placed.

E. 

Inside and aboveground tanks and auxiliary tanks shall be coated with a good quality rust-resisting print.

Editor's Note: See also Article VI of Chapter 41, Fire Prevention, pp. 4116 ff.