×
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

PSV relieving temperature

PSV relieving temperature

PSV relieving temperature

(OP)
PSV relieving temperature is sometimes above the design temperature of the equipment being protected.
I need you guys `s advice whether to change design temperature of the equipment, pipe line connected to PSV, gasket inside pipe to the relieving temperature or to keep the design temperature as it is. Thank you in advance.

RE: PSV relieving temperature

I would not be concerned if the PSV relieving temperature is above the design temperature of the equipment being protected - only for the fire sizing case.

RE: PSV relieving temperature

(OP)
Do you have any reference on your opinion ?
Please tell me !!!

RE: PSV relieving temperature

API 52O Part I states that "Pressure relief devices protect a vessel against overpressure only; they do not protect against structural failure when the vessel is exposed to extremely high temperatures such as during a fire."

Fire case issues exist regarding flange ratings.  If you select the PSV based upon the fire contengency case and include the pressure and temperature of the fire case then the flange must be rated for the higher class if applicable.  The PSV vendors will not sell you a valve with a flange rated lower than required for the pressure and temperature.

I know of no requirement that the protected equipment must comply with the fire case temperature.  API 521 addresses vessel ptotection from heat input.

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