Flash point of diesel oil with changing temperature

[edcox]

Hi all,

First post - I have just started out as a Grad. Mech. Engineer working on a diesel fuel oil system..

What I wanted to know (and couldn't really find anywhere else) was whether the flash point of diesel fuel changes significantly with pressure? We are using BP 10ppm diesel fuel with flash point of 61.5 degC (from MSDS). Then, pumping that at about 2 bar.

Due to high site temps (up to 50 degC), we need to classify hazardous areas, present when the fuel gets within 5 degC of its flash point.

Surely there would have to be a relationship/graph/equation showing this? i.e. to what extent does the flash point decrease for a certain increase in pressure. Or is it a non-issue?

Thanks in advance for any replies... This has got me stumped.

 

[Compositepro]

It's a non-issue. The flash point is 61.5C. Flash point is measured at ambient pressure, which is the relevant pressure for classifying an area.