×
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

Grounding above ground piperack

Grounding above ground piperack

Grounding above ground piperack

(OP)
I am working on a new facility that will have piping connected to an existing facility. The piping runs above ground and is installed in a piperack. The two facilities have independant power systems. There is no cathodic protection on the piping and the piping does not run parallel to a high voltage transmission line. Normally I always ground the pipe rack, but I've always worked in a single facility. Is there a requirement to isolate the grounds between the two facilities? Why would I want to isolate or connect the grounding grids of the two facilities through the piperack?

RE: Grounding above ground piperack

IEEE Std 80/2000 ch.17.9 Transferred potentials ch.17.9.5 Piping :
"Transferred potentials may be reduced or stopped at the substation
boundary by inserting insulating sections of sufficient length to avoid shunting by the adjacent soil. The insulating sections must be capable of withstanding the potential difference between remote earth and the substation."

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