×
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

Drain nozzle connection in expansion bellow of Heat Exchanger

Drain nozzle connection in expansion bellow of Heat Exchanger

Drain nozzle connection in expansion bellow of Heat Exchanger

(OP)
Hello all,

I have a BEM heat exachnger with expansion bellow. On shell side there is corrosive fluid . Therfore it is necessary to drain expansion bellow.
Now my question is :

Does any code ( ASME OR EN 13445) restricts to have opening in expanson bellow?
Is there any document whih shows the drain connection attached to expansion bellow?

Thanks

Regards
Mukesh

RE: Drain nozzle connection in expansion bellow of Heat Exchanger

What has your expansion bellows supplier said when you asked?

RE: Drain nozzle connection in expansion bellow of Heat Exchanger

(OP)
I Have not approached yet supplier.

RE: Drain nozzle connection in expansion bellow of Heat Exchanger

One option would be to use a flanged-only or flange-and-flued expansion joint, and locate the nozzle on the large-OD straight flange. See ASME VIII-1 Appendix 5, figure 5-2.

I don't see how this could be done on a normal bellows expansion joint.

RE: Drain nozzle connection in expansion bellow of Heat Exchanger

Also vent nozzle is required.

Regards
r6155

RE: Drain nozzle connection in expansion bellow of Heat Exchanger

In each convolution as well. Don't seem likely...

Regards,

Mike

The problem with sloppy work is that the supply FAR EXCEEDS the demand

RE: Drain nozzle connection in expansion bellow of Heat Exchanger

Only one convolution.

Regards
r6155

RE: Drain nozzle connection in expansion bellow of Heat Exchanger

r6155, with respect, neither of us knows what the OP is talking about...

Regards,

Mike



The problem with sloppy work is that the supply FAR EXCEEDS the demand

RE: Drain nozzle connection in expansion bellow of Heat Exchanger

(OP)
HELLO,

IS THERE ANY CODE WHICH SHOWS OPENING IN EXPANSION BELLOW OPENING IS NOT ALLOWED OR ALLOWED?

RE: Drain nozzle connection in expansion bellow of Heat Exchanger

yaar123, IF you are talking about a thick expansion joint, a pair (or more) of flanged or flanged and flued heads, see marty007's reply. Note Appendix 5 does not require vents / drains, but if fitted then these rules apply.

IF you are talking about a thin bellows joint, as per ASME Sec VIII, Div 1, Appendix 26, then I believe there are no rules concerning connections in the bellows convolution. I do believe the bellows vendors will tell you the stresses in the convolution cannot be managed, but you'd have to ask them.

Note that these joints are normally made of corrosion resisting materials such as inconel.

Cannot speak as to other Codes.

Regards,

Mike

The problem with sloppy work is that the supply FAR EXCEEDS the demand

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