It shall be the duty of the Fire Chief, when directed to do so by the City Council, Building Inspector, State Fire Marshal, or if deemed necessary by the Fire Chief, to inspect or cause to be inspected by Fire Department officers, members, or some other official all buildings, premises, and public thoroughfares, except the interiors of private dwellings, for the purpose of ascertaining and causing to be corrected any conditions liable to create a fire hazard. The inspection shall be of the storage, sale, and use of flammable liquids, combustibles, and explosives; electric wiring and heating; and the means and adequacy of exits, in case of fire in schools, churches, hotels, halls, theaters, factories, hospitals, and all other buildings in which numbers of persons congregate from time to time for any purpose whether publicly or privately owned; the design, construction, location, installation, and operation of equipment for storing, handling, and utilizing of liquefied petroleum gases, specifying the odorization of gases and the degree thereof; and chemicals, prozylin plastics, nitrocellulose films, or any other hazardous material that may now or hereafter exist.