×
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

Extneded bonnet vs Normal Bonnet for minus 30 deg C

Extneded bonnet vs Normal Bonnet for minus 30 deg C

Extneded bonnet vs Normal Bonnet for minus 30 deg C

(OP)
We are currently handling a project for CNG that are cooled down until minus 30 deg C. The valves would use LTCS material.

We would like to have suggestion regarding the bonnet type. Is minus 30 deg C, can use normal bonnet or shall use extended bonnet?

I am thinking of using extended bonnet because of (1) If the valve is not extended bonnet type, there will be a possibility of icing (because of humidity or rain) on the valve stem that will harden the operability. (2) The “extended bonnet” is needed so the insulation can fully covers valve.

But my supervisor insisted of using normal bonnet, since the client does not specify (infact there is no piping class from the client).

RE: Extneded bonnet vs Normal Bonnet for minus 30 deg C

Extended bonnets may not be required for small bore lines up to -50 deg C.

RE: Extneded bonnet vs Normal Bonnet for minus 30 deg C


How to protect against cold have to be decided by the end-user, based on the actual application (and surroundings) for the single valve.

An extended bonnet could be one of several possible precautions, but not necessarily the best, and referring to uaepiping, not required.

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