×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

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!

*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

API 2000 Emergency Venting, Asphalt and Used Motor Oil Tanks

API 2000 Emergency Venting, Asphalt and Used Motor Oil Tanks

API 2000 Emergency Venting, Asphalt and Used Motor Oil Tanks

(OP)
I'm looking at designing emergency venting for two different tanks, one for asphalt/bitumen storage and one for used motor oil storage. The design spec for both tanks is API 650 which states that all tanks require a form of emergency venting: tank frangibility or pressure relief devices per API 2000.

However, NFPA 30 states that tanks storing Class IIIB liquids that are larger 12,000 gallons and are not within the diked area or the drainage path of tanks storing Class I or Class II liquids do not need to consider emergency venting. And both tanks meet all criteria for this exemption.

Question is, would we be required to meet API 650 rules or could we use the NFPA 30 exemption? Or maybe a better question, is there a standard practice in the industry regarding emergency venting for Class IIIB liquids or more specifically, asphalt/bitumen or used motor oil?



Part of the issue with providing emergency venting is that I can't find definitive numbers for the Latent Heat of Vaporization and Molecular Mass of Vapor for either liquids, which I need for API 2000 Equation (15). And in lieu of Equation (15), I'm not sure if it's reasonable/conservative to use the Hexane Tables 5 through 8 since I don't believe they have similar properties.

I did come across the Vetere Model for the Latent Heat of Vaporization of Pure Hydrocarbons = 4.1868*T *(9.08+4.36*log(T)+0.0068*T/M+(0.0009*T^2)/M) T = Boiling Point in Kelvin M = Molecular Mass of Liquid
Not sure if this is accurate since asphalt and used motor oil are composed of innumerous types of hydrocarbons with extreme variation in boiling points and molecular weights.

Any input would be greatly appreciated on any of the topics above. Thank you!

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

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. 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