#2 F.O. heated to 155dF is explosion proof equip. required?

[AJ2002]

I have a question about a gas turbine project I'm working on. The turbine has liquid #2 FO that is heated to 155 deg F and circulated continuously for emergency standby. This fuel is contained in the piping and heater system and does the area surrounding the piping need to be explosion proof? The flash point of #2 is ~125 deg F. The gas turbine does not have explosion proof equipment and is liquid fuel only.

Does anyone have any good references or web links that would help answer this?

 

[srfish]

Are you sure about that flash point of #2 FO ? 125 F. looks too low for that type of oil.

 

[BigInch]

Key words are "Ignitible" and "volatile". If 125ºF is correct, which does appear low, it looks like .. yes.

Class I, Division 1. Ignitible concentrations of flammable gases or vapors may exist in the course of normal operations [500.5(B)(1)].

Class I, Division 2. Volatile flammable gases or vapors would become hazardous only in case of an accident or some unusual operating condition — or under certain conditions [500.5(B)(2)]:


Where volatile flammable liquids or gases are handled, processed, or used, but are normally confined within closed containers and the gases would escape only in the case of accidental rupture or breakdown — or by abnormal operation of equipment.

Where ignitible concentrations of flammable gases or vapors are normally prevented by positive mechanical ventilation, but might become hazardous through abnormal operation of ventilating equipment.

Areas adjacent to a Class I, Division 1 location where flammable gases or vapors might occasionally be present unless prevented by adequate positive-pressure ventilation with effective safeguards against ventilation failure.





BigInch-born in the trenches.

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