[Vwdiesel] ULSD Typical Spec (fwd)
val at mongobird.com
Fri Feb 9 18:24:26 EST 2007
> From: Val Christian <val at mongobird.com>
> Subject: ULSD Typical Spec
> Date: Tue, 6 Feb 2007 15:13:10 -0500 (EST)
> OK, local drivers and mechanics are saying the ULSD doesn't work for them
> with this week's WX (-20C, 0F) type temperatures.
> Some mail list people have stated that ULSD has a depressed pour point.
> I looked at the .mil presentations on ULSD and they specifically complain
> about poor pour points, poor cloud points, and seal failures. They also
> say that there is effectively very little or no ULSD No 1 fuel (kerosine)
> to blend with the ULSD #2.
> I found a spec, pdf attached, that claims that a typical cloud point is 14F,
> and a pour point of 0F, without additives. If that is really typical, no
> wonder we are having problems. At -10F, it's a wonder we can suck
> jello out of the fuel tank!
> Seems like there's trouble in River City. My guess is that this winter will
> be cause for reblending, and possibly cause for ULSD #1. Technical press
> articles claim that the parafin in ULSD is such that it is long chains, and
> will precipitate out at much higher temperatures. +14F would fit my
> concept of a higher temperature.
Here's the txt extract of the pdf I foolishly attempted to forward:
TYPICAL SPECIFICATIONS FOR ULSD
DIESEL FUEL ULSD
PHYSICAL PROPERTIES TYPICAL ANALYSIS
API GRAVITY 30
LBS./ GALLON 7.0
FLASH POINT, F. 150
INITIAL BOILING POINT 365
50 % RECOVERY 500
90 % RECOVERY 540-640
END POINT 650
POUR POINT, F. 0
CLOUD POINT, F. 14
CFPP, F. 12
VISCOSITY @ 40 C., CST 2.5
SULFUR, % WT. <0.04 (400ppm) <0.0015 (15ppm)
CETANE INDEX NUMBER 40
COLOR RED or UNDYED
WATER & SEDIMENT NIL
COPPER STRIP CORROSION @ 122 F. 1A
ASH, % WT. NIL
NOTE #1: Values listed above represent typical properties. These values may vary between terminal locations.
NOTE #2: ULSD FUEL has lubricity requirement of <520um wear scar per HFRR (High Frequency Recipricating
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