flashpoint of JetA1
Thread Starter
Joined: Jul 2003
Posts: 265
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From: germany
flashpoint of JetA1
Hi, max. fuel temperature in the AFM or our aircrafts (Citation CJ1+/CJ2+) is described as +57 degrees Celsius. Given the fact that the flashing point of Jet A1 is at +38 degrees, I was wondering why max. fuel temperature is not also set at +38.
Inputs welcome,
Cheers
Cecco
Inputs welcome,
Cheers
Cecco
Joined: Feb 2009
Posts: 579
Likes: 0
From: Worldwide
Cecco,
The flash point is the lowest temperature where the liquid gives off vapours that can be ignited by an ignition source. So even if the fuel temperature is above the flash point, it will not ignite by itself. That won't occur until above 200 degrees Celsius.
The flash point is the lowest temperature where the liquid gives off vapours that can be ignited by an ignition source. So even if the fuel temperature is above the flash point, it will not ignite by itself. That won't occur until above 200 degrees Celsius.
Joined: Jul 2007
Posts: 610
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From: France
Flash Point of JetA1
Cecco:
The flash point of Jet A1 is approximately 40 degrees centigrade,
The equivalent in Russia was called JT-1 which had a flash point of 28 degrees centigrade, so the risk was a little bit greater.
Tmb
The flash point of Jet A1 is approximately 40 degrees centigrade,
The equivalent in Russia was called JT-1 which had a flash point of 28 degrees centigrade, so the risk was a little bit greater.
Tmb
Joined: Jan 2007
Posts: 200
Likes: 0
From: Vermont
The flash point is the lowest temperature at which the fuel vapor can burn in the presence of a continuous ignition source. If the ignition source is removed, the fuel stops burning.
The fire point is the lowest temperature at which the fuel vapor will continue to burn after the ignition source is removed...much higher than the flash point.
Both of these are specification standards; they are used to characterize a fuel's chemistry and behavior, not necessarily as specific safety thresholds. However, a higher flash point is used to distinguish a greater safety factor in storage and fuel delivery. The US Navy uses JP-5 for shipborne aviation because it has a flash point of around 62C.
Neither of these temperatures is related to the auto-ignition temperature, at which the fuel will spontaneously ignite and burn. This is generally much higher than the fire point.
The fire point is the lowest temperature at which the fuel vapor will continue to burn after the ignition source is removed...much higher than the flash point.
Both of these are specification standards; they are used to characterize a fuel's chemistry and behavior, not necessarily as specific safety thresholds. However, a higher flash point is used to distinguish a greater safety factor in storage and fuel delivery. The US Navy uses JP-5 for shipborne aviation because it has a flash point of around 62C.
Neither of these temperatures is related to the auto-ignition temperature, at which the fuel will spontaneously ignite and burn. This is generally much higher than the fire point.
Joined: Nov 2007
Aviation Qualifications: ATPL
Posts: 1,954
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From: Texas
Can you specify that? You mean that above the max. fuel temp. the heat exchange fuel/oil doesn´t work properly?
