×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

how does flash point relate to the out of service fuel concentration

how does flash point relate to the out of service fuel concentration

how does flash point relate to the out of service fuel concentration

(OP)
Our plant handles methanol and xylene and I would like your thoughts on the practices used when cleaning the tanks. They fill and drain out the water and then run a flashpoint on the residual water (~ 100 F) judging the tank is clean and air can be admitted into the tank when the flashpoint is above 200 F, rather than sampling the vapor space and determining that the concentration is below the Out of Service Fuel Concentration (OSFC) as determined from the fire triangle.

How does the flashpoint relate to the OSFC, for the methanol/water case and for the xylene/water case?

Any hidden pitfalls to using the flashpoint in place of the OSFC? What restriction to adopting that approach should be applied?

RE: how does flash point relate to the out of service fuel concentration

Methanol vapor would be very soluble in water, so given sufficient contact time and adequate turbulence in the water, a sample withdrawn from the liquid phase would enable a true picture of the flash point wrt to methanol.

Xylene vapor however, is only very slightly soluble in water, so a water sample would give a very poor indication of how much xylene there is in the vapor space. This is because the error in concentration readout in the liquid phase would normally be such that you would get a false picture of the xylene concentration in the vapor space....unless you have a device or procedure that gives you a high resolution concentration estimate.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Resources

White Paper - The Evolving Landscape of Commercial Battery-Powered Trucks
What’s driving the evolving landscape of truck electrification? What are the barriers, motivators and strategies for accelerating the electric transition? What insights and resources are available for today’s design engineers working to achieve industry disruption and evolution? For answers to these and other pertinent questions, read this white paper. Download Now
eBook - Rethink Your PLM
A lot has changed since the 90s. You don't surf the Web using dial-up anymore, so why are you still using a legacy PLM solution that's blocking your ability to innovate? To develop and launch products today, you need a flexible, cloud-based PLM, not a solution that's stuck in the past. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close