×
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

API 500 part 6.5 interpretation?

API 500 part 6.5 interpretation?

API 500 part 6.5 interpretation?

(OP)
Looking for some clarification on part 6.5 of API RP 500, specifically around subpart e. Subpart e states that when gas detection sniffs 40% LFL, power must be cut from all electrical devices that are not suitable for Div 2. The way i'm interpreting this is that i can have an inadequately vented area with unclassified components as long as i have gas detection that trips all power non-div 2 components on a 40% detection, and call the whole area Div 2?!

The situation that i'm trying to address is an inadequately ventilated area that processes produced water. With any process upsets, the produced water is likely to contain condensate carryover, thus i'm classifing the area as div 1 as described in 10.8.1.1.2.3.
Though I imagine adequate ventilation is the preffered fix, we're operating in very cold temperatures, so freezing is an issue.

Any advice or help on this would be great! -Thanks

RE: API 500 part 6.5 interpretation?

Is the tank and and its vents inside too?  If not, the pumps and the building around them would be div 2.

RE: API 500 part 6.5 interpretation?

If you have a classified area, then all electrical components must be suitable for that area regardless of ventilation.  Also check out the Electrical Code NFPA#70 for classified areas.

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