Suggested What-If Worksheet Arrangement

WHAT IF... HAZARD CONSEQUENCES SAFEGUARDS RECOMMENDATIONS REMARKS [Pg.57]

Low pressure gas line is plugged. Loss of fuel for heater and Instrument gas supply Total shutdown Valves are fail safe, ESO occurs [Pg.57]

Loss of fuel gas to Heater. Hydrate formation plugging line Overpressure upstream system Local Tl PSV s on the system Install TSL on H-1 outlet and common alarm beacon [Pg.57]

3 Loss of fuel gas to catalytic heater., ow ambient temp in xil Idfng Possible equipment failure TSL Initiates ESO Indirect fire heater should provide heat source [Pg.57]

Liquid build up in fuel gas system. Plugged Instruments System shutdown Knock out drun V-2 Install desiccant dryer on instrunent gas (disposable type) [Pg.57]

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