ORDINANCE NO. 8874 - Laserfiche WebLink

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425 - -- --- (b) Tanks for. Cla.PS 11 and 111 licuids of 1S1 to 275 gallons capacity shall be constructed' of =not ~less::than'-'No.;:1~4~ II.S, steel or ~rrought iron: larger tanks shall be constructed in ac~ordarce ~f.roth the requirements of Section Q56. (c) Tanks sha1.1 be located beloT~! the level of any piping to n~hich. they may be connected, or if' this is impracticable, arrangements sz.tisfactory to the Chief of the Bureau of Fire Prevention shall be m~,d.e. (d) tanks shall bP set on a, firm foundation a.nd those exceeding 2,5C0 gallons ca.io~.city shal_1 be supported independently of the floor construction. (e) Tanlcs for Class 111 liquids used in connection ?with oil burning equipment shall. not exceed 275 gallons ir_dividual capacity or 550 gallons aggregate capacity (in one building} , unless ir_statled in an enclosure constructed as follo~~~s: The enclosure shall be at least 6 inches larger on all sides than the tank. The ?~~alls of the enclosure shall. be constructed of reinforced concrete at least 6 inches thick or of masonry a,t least S inches thick, and. shall be bounded to the floor and carried to a height not less than 1 foot above the tank. The space between the tank and the enclosure ,shal_1 be completely filled with sand. or tr~ell tamped earth up to the top of the enclosure. The top of the enclosure shall. be cf reinforce@ concrete at least 5 inches thick or. of equivalent construction, except ?•~here the floor or other construction imm- ediately above the tank is of fire-resistive construction and capable of safely ?aithstandinf a. load of 150 pounds per square foot. Instead. of an enclosure as above described, the tank may be encased in reinforced concrete not less than ~ inches in thickness, applied directly to the tank so as to~ecm- pletely eliminate any air space. 971 PIPING AATD OTT-~I? A_pPt~~i?E?~?TAnTCES NO CGS~iNE""'IC~I~?S TO DF~IIT?S. A11 connections from tank to any house or sub-surface d.ra.inage system shall be so arranged. ~s to prevent the flo~r~ of flammable liquid to any such system or the leakage of any flammable gases from such liquids, or approved. flammable liquid collectors shall be provided. in such cornectiori. VEPTT I DTG CF TANKS . An open ga1_va.nized iron vent pipe ~.rr.anged for. proper draining, or an automatically operated. vent, shal_1 be provided for every tank ~~rhicli may contain flammable vapor. The l_o~,~er end of the vent pipe shall not extend through the top iri to the tank for a. dist~.nce of more than one inch. Vent ope`~nings, except those on underground fuel oil tanks, aha.ll be provided ?erith approved flame arrestors. Vent openings and vent pipes shall be of sufficient size to prevent abnormal pressure in the tank during filling and. except automa,tica.lly operated vents, shall be not smaller than 1~-inch pipe size. Arrestors sha.1.1 be accessible for examination a,nd. repair. Vent pipes sha1.1 be provided =with ~r~eather proof hoods and. terminate outside of buildir._g net less than tv~o feet, measured horizontally and ver.tica.lly, from any ~~~indc~r+ or. other building opening. If tight connection is made in filling .line and fii.ling is by gravity, the vent pipe shall extend to a point a.t least one foot above the level of the top of the gighest reservoir from which the tank may be filled, otherwise it shall_ be not leas than 12 feet above the top of. the fill pipe. Where a poi,±er pump is used. in filling storage tanks and a. tight connection ~s made to the fi1.l pipe, the vent shall be not smaller than the fi1_1 pipe. The vent pipe from two or more t?.nks may be connected to one upright ?•rith the connection not less than one foot above the level of the top of the highest reservoir from tr~hich the tanks may be filled. VALVE IA DR4~}iING=OFF PIPES. ' All d.r~!rring-off pipes terminating inside of any building shall have valves a.t the discharge end; ashen delivery is by gravity, there shall be a second valve located a.t a. suitable point in the lire for use in an emergency. ~. VALVE NEAR TANK IF ABOVE GROUND Where tanks are above gro?~r_d there shall be a valve located near the tank in each pipe. In case t?arc or. more tanks are cross-connected there shall be a valve near each ts,n in a%ch cross-connection.. PUA4P S . Pumos delivering to or tanking supply from above gro~znd storage tanks shall be provided *sith valves on both suction and discharge of pump, and in delivering to tanks a check valve to prevent flo?~r of liquid from tank `to pump. Electric motors, unless of approved explosion-proof type, and internal combustion engines aha1.1 not be placed