Piping (above ground tanks) SECTION 12. (a) Standard, full weight wrought iron or steel or brass pipe with substantial iron or brass fittings to be used. Wrought iron or steel pipe and wrought or cast iron fittings to be galvanized. (b) Piping to be run as directly as possible, and proper allowance made for expansion and contraction. (c) All piping for above ground tanks must be protected against mechanical injury. (d). Connections to be made perfectly tight with well fitting joints. Unions, if used in place of right and left couplings, must be of type approved by the National Board of Fire Underwriters. Maintenance of Above Ground Tanks SECTION 13. (a) No accumulation of rubbish or other combustible material shall be permitted on the premises of such above ground storage. (b) No open lights or flame shall be permitted in the vicinity of tanks or piping containing hazardous liquids. Construction of Above Ground Tanks SECTION 14. (a) Horizontal or vertical tanks not over 1,100 gallons capacity. (c) Vertical tanks over 1,100 gallons ca pacity under 40 feet in diameter and containing not more than 5,000 gallons: Bottom No. 8 gauge. Bottom Ring No. 7 guage. Other Rings No. 8 gauge. Top No. 12 gauge. (d) Tanks of greater capacity than given above shall be of material of sufficient thickness to safely hold the contents and propor tionately heavier, and shall have a factor of safety of at least 2.5 at all joints. All riveted joints to have an efficiency of at least 60 per cent. No vertical tanks shall be more than 30 feet high. Tanks shall be made tight in a mechanical and workmanlike manner, and shall be covered with asphaltum or other non-rusting paint or coating. All pipe connections to above ground tanks shall be made through flanges or reinforced metal securely riveted, welded or bolted to tank and made thoroughly tight. Before installation of any above ground tank all local ordinances and regulations must have been complied with. SECTION 15. General storage above ground, including use and handling, continued. The preceding chapter contemplated storage in large or comparatively large quantities in such locations as specified, and as is found in connection with oil fields, oil refineries or distributing stations. To take care of the situation presented by the storage of hazardous liquids in connection with numerous other properties where the preceding Rules and Regulations could not be interpreted as applying, the following are in order: (a) Within the fire limits of any city or town. In frame buildings : Class III. Maximum limit of any tank or container to be 60 gallons. In other than frame buildings: Class I, in sealed containers or safety cans of not more than 1 gallon capacity, and not exceeding a total of 10 gallons. Class II, in sealed containers or safety cans of not more than 5 gallons capacity and in barrels, drums or tanks of not more than 60 gallons capacity. Class III, in sealed containers of not more than 5 gallons capacity, in barrels, and drums and in tanks not exceeding 120 gallons capacity. (b) Outside the fire limits of any city or town. In frame buildings: Class I, (such as ether, carbon bisulphide, gasoline and naphtha, benzol, collodion, hydrocarbon (gas drips), liquefied petroleum gas, in sealed containers or safety cans of not more than 1 gallon capacity and not exceeding a total of 10 gallons. Class II, (such as acetone, alcohol, amyl acetate, toluol), in sealed containers of not more than 5 gallons capacity and in barrels, drums or tanks not exceeding 60 gallons capacity Class III, (such as kerosene, amyl alcohol, turpentine, distillate, fuel oil), in sealed con tainers not exceding 5 gallons capacity, in barrels and drums and in tanks not exceeding 20 gallons capacity. In other than frame buildings: Class I, (such as ether, etc.), not exceeding 50 gallons in sealed containers or safety cans of not more than 1 gallon capacity. Class II, (such as acetone, etc.), in sealed containers or safety cans of not more than 5 gallons capacity, in drums and barrels and in tanks not exceeding 120 gallons capacity. Class III, (such as kerosene, etc.), in sealed containers, drums and barrels and in tanks not exceeding 240 gallons capacity. SECTION 16. In manufacturing plants and other special cases, the Fire Marshal, Chief of Fire Department or other proper authority may permit the storage of inflammable liquids in portable wheeled tanks and the discharge from such tanks directly to the place where such inflammable liquids are used. No such wheeled tank shal be used in any store for the storage or handling of Class I liquids. SECTION 17. Special rooms for storage of inflammable liquids and the handling and use of inflammable liquids shall, where called for in these rules and regulations, be constructed as follows: Walls, floors and ceilings to be of 8 inches of brick or concrete, or 4 inches of reinforced concrete; door openings to other rooms or buildings to be provided with sills raised six inches and with automatically |