×
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

Failed thermal relief

Failed thermal relief

Failed thermal relief

(OP)
I am investigating the failure of a differential thermal relief valve on a twin-seated plug valve used in an outlet from butane sphere. The relief valve failed to open and the back (bottom) of the valve popped open; a semi-circle of bolts were punched out; one was severely bent, a couple were broken. A black residue was discovered plugging the relief valve and its inlet line. The residue came out as iron sulfide. The valve manufacturer claims that the high pressure should have forced its way through the valve – what do you think? He recommends periodically opening the vent on the line to the relief valve as a workaround. I am think of taking a look at the upstream filters. This is a buried butane line for most of the run to the blenders. Has anyone else had similar problems with their valves regarding plugged thermal reliefs?

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