What is vapor pressure of #1 Diesel fuel 1

[ProcEng2]

Anyone know the vapor pressure of #1 diesel fuel at
ambient temperature. I am thinking it is near a perfect vacuum...

If so, then it would "add" atmospheric pressure for NPSH available?

 

[JLSeagull]

Number 1 fuel oil is essentially kerosine.

 

[mbeychok]

ProcEng2:

The U.S. EPA's publication "AP 42, Compilation of Air Pollutant Emission Factors", Chapter 7, Table 7.1-2 gives the following True Vapor Pressures for Kerosene (which is essentially #1 Diesel:

40 deg F = 0.0041 psia
60 deg F = 0.0085 psia
80 deg F = 0.015 psia
100 deg F = 0.029 psia

AP 42 can be found online at

http://www.epa.gov/ttn/chief/ap42/index.html

Milton Beychok
(Visit me at www.air-dispersion.com)
.

 

[BigInch]

Nowhere near perfect vacuum.

Its around 0.5 psi at normal ambient temps

Calculate vapor pressures,

http://www.epa.gov/ttn/chief/ap42/ch07/final/c07s01.pdf

http://www.hawaii.gov/dbedt/ert/new-fuel/files/afrw/afrw-04.pdf

http://virtualpipeline.spaces.msn.com

 

[JStephen]

See if you can locate an MSDS sheet for the actual material in question- they quite often show that on there, and saves you wondering whether "essentially" is close enough.

 

[25362]

The value given by BigInch seems to be on the high side and is very similar to that of water at 80[sup]o[/sup]F. JStephen's advice is logical.

 

[BigInch]

Sorry, forgot to note its a Reid vapor pressure. Better now?

http://virtualpipeline.spaces.msn.com

 

[25362]

It's better but still on the high side for kerosine-type fuels with Initial Boiling Points [≥]280[sup]o[/sup]F.

 

[BigInch]

That's the value I've got and I'm sticking to it. I like it better on the conservative side of things.

http://virtualpipeline.spaces.msn.com