1999 MAY - Laserfiche WebLink

20.24.120 to an approved central station, to provide an immediate response to an alarm. The alarm shall be both visual and audible and shall be designed to provide warning both inside and outside of the storage, use or handling area. The audible alarm shall be distinct from all other on-site alarms. (6) Reduced Flow Valves. Re- duced flow valves may be utilized to reduce the maximum flow rate from cylinders and tanks under full flow conditions. Valve flow rates may be considered in deter- mining the size of treatment sys- tems required for a worst case release. (7) Seismic Shut-off Valves. A __ seismologically activated valve meeting standards approved by the Fire Chief shall be provided for automatic shut off of regulated materials upon a seismic event within 5 seconds of horizontal semisoidal oscillation having a peak acceleration of .15g (=1.47m/sec2) and a period of .4 seconds. (8) Class II Corrosives. Inert construction materials shall be used for the primary containment of Class II Regulated Materials which are corrosives. Alternative- ly, secondary containment shall be provided for Class II materials which are corrosives. (9) Emergency Alarms. When materials regulated by this Article are transported through exit corri- dors or exit enclosures, there shall be an emergency telephone system or a local manual alarm station or a signaling device approved by the Fire Chief at not more than 150-foot intervals and at each exit doorway throughout the transport route. The signal shall be relayed to an approved central station and shall also initiate a local audible alarm. (d) Class III Controls. Persons responsible for a facility shall cause materials which are classified as Class III materials to be provided with the controls specified in this subsection (d) and in subsections (e) and (f) of this section. (1) Piping, valves and fittings. [i] Piping, valves, fittings and related components shall be designed and fabricated from materials compatible with the material to be contained. They shall have strength and durabili- ty sufficient to withstand the pressure, structural and seismic, and any other stress and expo- sure to which they may be sub- jected. [ii] Expansion chambers may be provided between valves whenever the regulated gas may be subjected to thermal expan- 710-25 (Pleasanton 5-99)