×
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

LPG pipeline commissioning procedure

LPG pipeline commissioning procedure

LPG pipeline commissioning procedure

(OP)
Help me to find a procedure for offers LPG pipeline commissioning about what is the ideal LPG pressure to move the train pigs/Nitrogen column, how to operate to fill the entire pipe (100 Km) with LPG liquid phase

Thank you in advance.

RE: LPG pipeline commissioning procedure

In essence quite straightforward. You will have a minimum pressure that you need to maintain to keep the LPG at to keep it in a liquid state at your design temperature. You pressurise the pipeline with Nitrogen ( a lot of nitrogen, but that can't be avoided) to above that minimum pressure, then insert a pig (bi-di) and start pumping at a rate equivalent to betwenn 1 and 2 metres /second. Release Nitrogen at the other end maintaining your minimum pressure. You need to look at the profile so that the minimum pressure is maintained at the high points which may be higher than in normal operation and you may need to increase Nitrogen pressure if there is a long downhill slope. Make sure the vent can handle some bypass LPG or route it via a tank which can release the volume of Nitorgen that is required.

My motto: Learn something new every day

Also: There's usually a good reason why everyone does it that way

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!


Resources