RR1108 - Liquid classification for flammable mists
Many types of industrial equipment can potentially produce an explosive oil mist if a fault develops. However, information on the conditions in which a mist can be ignited and continue to burn is limited. To help address this, HSE and 14 industry sponsors co-funded a Joint Industry Project (JIP) on oil mist formation and ignition.
This report, produced for the JIP, addresses the contribution the fluid within a pressurised system makes to the risk of an ignitable mist forming if a leak develops.
Fluids were put into three groups, based on their flashpoint and ease of atomization: "volatile fuels" include fuels and solvents which have a low flashpoint and atomize easily; "lubricants" include many actual lubricants and also heat transfer fluids and other oils with a relatively high flashpoint and poor atomization; "fuel oils" which have a low flashpoint but poor atomization.
When heated, "fuel oils" should show similar behaviour to "volatile fuels".
This work was used to select a representative fluid from each group for use in experimental tests.
Visit the RR1108 report (PDF) [12]
Assistance in the use of Adobe Acrobat PDF files is available on our FAQs[13] page.