ORDINANCE NO. 8874 - Laserfiche WebLink

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424 95g CONSTRUCTIOTI OF To.I~1KS. I (a) Tan_~s sha.7.1 be riveted, welded or brazed., and. shall be soldered, caulked or otherT~rise made tight in a mechanical and ~ror?~anlike manner, and if to be used with a pressure d.ischa,rge system shall safely sustain a hydrostatic te4t at least double the pressure to ~,a~hich tank may be subjected.. Tanks shall be covered frith asphaltum or other non-rusting paint or coating. All pipe connections shall be made through flanges or metal reinforcements securely riveted, welded or bolted. to the tank and shall be made thoroughly tight. All openings shall be gas tight, except breather vent, tr~hich shall be pro- tected by flame arresters as provided in Section 95~-. (b) ~~Jhere tanks are to be of welded construction, the Chief of the Bureau of Fire Prevention shall require evidence of the integrity and responsibility of the firm or individual doing the ~,rork, the degree to which welders are qualified and the character of supervision maintained ~ahi].e ~,aelding is in process. (e) Tanks for storage of flammable 7.i quids under a pressure in excess of 15 pounds per square inch (gage) sha.l7. be constructed and protected with safety relief devices, in accordance ~,rith the Unfired Pressure Vessel code of the American Society of Mechanical Engineers. < g59. FOUNDATIONS: DIKES. (a) In each case of the bearing capacity of the ground sha17_ determine the type of foundation to be employed. ~~here there is any doubt the Cheif of the Bureau of Fire Prevention may require borings in or. der to ascertain the subsurface information as a means of determining ~-rhether the proposed foundation is suited to ground conditions on the site. Tanks more than one foot above the ground. shall have foundations a,nd supports of masonry or protected steel, except that wooden cushions may be used; no combustible material shall be permitted under or within ten feet of any above ground outside storage tank. (b) A17. tanks containing crude oil or other liquids which have a tendency to boil over, and all tanks exceeding 50,000 gallons ( 1-,200 barrels) capacity shall be adequately and properly diked *frith a dike having capacity not less than equal in volume to that of the tank or tanks surrounded.; minimum height or earth dikes to be 3 feet and of masonry dikes 30 inches. (c) Tanks of less than 50,000 gallons (1,200'barrels) capacity shall, tuhen deemed necessary b y the Chief of the Bureau~of Fire Prevention, on account of proximity to streams, character of topography or nearness to building of high value, be diked or the entire yard provided with a curb br retaining wall or. other suitable means taken to prevent the discharge of liquids on to other property in ease of a rupture in tank or piping. (d) Dikes or wa7.ls required by the prededing paragraphs (b) and (c) shall be of earth or masonry so constructed as to afford adequate protection. UThen dikes surround tanks containing crude owl, they shall have in addition to the above capacity, suitable coping or deflector projecting invrard. properly constructed to minimize the effect of a °boil over~~ ~r!a,ve. Dikes surrounding crude oil tanks shall be not less than 50 feet from the shell of the tank or tanks surrounded. (e) The height of the dike and the distance from the inner surface of the tank or tan'_<cs surrounded sha.l.l be such as to assure the scouring action of the winds required to prevent the accumu7.ation of combustible vapors within the dike, but in no case shall the height of the dike exceed 6 feet. Masonry dikes !~rith~angular walls shall be provided with expansion joints constructed of single sheet non=corrosion metal. L~here reinforced concrete is used, the steel reinforcing member°shall be interconnected. ~ '° (f) The capacity of dikes required by this Section shall be properly maintained. Earthen dikes shs,ll have a flat section at the top and shall have a slope consistent with the angle of repose of the ma,teria.ls of which they are constructed. I g60 STATIONARY_ TANKS IN BUILDINGS: IrTSULATION OF TANKS: PERMISSIBZrF QUANTITIES. i ~ _ ~ Tanks in buildings shall be constructed and installed- as follo~rrs: (a) Tanks for Class 11 and 17.1 liquids of 180 gallons or less capacity, shall be of steel 'or of t~:n plate, suitable for the purpose, with all joints locked, double seamed or riveted and also soldered or made tight by some enually satisfactory method; material shall. be of not less than No. 16 gauge U.S. Standard. Original ' barrels or drums may be used. until cor_tents are drawn of substantially placed to prevent tipping or rolling, tarith pump inserted through a close fitting connection in side or head, in Fire Zones 1 or 17. and p7.aces of public assembly. i