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

Lube Tank High LEL

Lube Tank High LEL

Lube Tank High LEL


We have two compression systems in our business unit with consistent high LEL readings in the lube oil tanks.  Both of these units are on the same facility and are the only two out of the entire business unit experiencing this problem.

The first unit is a Centaur 40L driving a C30 compressor with suction conditions of 300-330 psig and 140 deg F, discharge conditions of 600-650 psig and 260 deg F.

The second unit is a Saturn 20 driving a C16 compressor with suction conditions of 600-650 psig and 120 deg F, discharge conditions of 1200-1300 psig and 240 deg F.

To resolve or determine the cause of the high LEL we have,

- Replaced the seals

- Adjusted buffer gas pressure and rates as well as replace the regulators

- Rebuilt and replaced the seal oil traps numerous times

- Verified that the flame arrestor in the vent line is not blocked and there is no back pressure (each tank has independent vent line)

We have had Solar FSR and maintenance teams review the problems and try to fix them but have been unsuccessful.  They are now proposing a degassing tank system to be installed on each unit at a cost of $125K each, but cannot supply us with technical back up to explain what is causing the high LEL’s.

In order to process and gain approval on an AFE, we need a technical justification of why the problem exists and that the only way to fix it is the installation of the degassing system.  Solar to date has only been able to say that they don’t know what is causing it, but by installing this system it will be fixed.

I’m concerned that the problem may be fixed easier / cheaper if we knew what was causing it, and as these are the only two units and are on the same facility that we may be missing something, and if other units in the SBU start to have high LEL’s that we may jump to the conclusion of the degassing tank systems.

Has anyone in the network experience the same problems or have suggestions for us?

Thank you,

c/o  J.G

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


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