×
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 tubes on exchanger unit .
2

failed tubes on exchanger unit .

failed tubes on exchanger unit .

(OP)
We are experiencing recurring failure on tube-ends resulting from erosive action of quench water being redirected at velocity from division plate on channel end.

Does any one have experience of providing 'sacrificial' barrier on tube sheet and including 25mm. into tube bore.
Tubes are tube-end welded.
The suggestion has been made to fit stainless steel clad sheet which would include ferrules into tube.

a second suggestion has been to provide a protective film
but of what material.

RE: failed tubes on exchanger unit .

What are the tubes made from?  There are various epoxy coatings which will probably withstand this erosion.  They are applied pretty thick to tubesheets( ~3/8").

RE: failed tubes on exchanger unit .

There is a product called Condesner Tube Packing Rings that can also be used.  It's a sleeve that fits inside the tube end to protect it from the fluid.  

RE: failed tubes on exchanger unit .

(OP)
have you any particular info  ; about suppliers of ferrules within UK.

RE: failed tubes on exchanger unit .

You can install sacrificial anodes, and there is another solution too for tubesheet coating with epoxy paint.

RE: failed tubes on exchanger unit .

I know that some pump packing companies carry this item.  Try your local John Crane supplier.

RE: failed tubes on exchanger unit .

I have successful experience of using nylon tube inserts in a sour water (water containing H2S)heat exchanger.

These were supplied by a UK company called Corrocoat Ltd. Contact was Simon Conroy tel 01132760760, website www.corrocoat.com

They come in all standard tube sizes/gauges and are typically 4-6" long. Generally they are a tight push fit into tube or a adhesive can be supplied. They are specifically designed to overcome erosion/corrosion in first few cm's of exchanger tubes.

RE: failed tubes on exchanger unit .

About beefing up the size of the welds on tube ends? perhaps you could slow down flow of quenching water!!!
I suspect that there are several hundred tubes of small dia. so the question of beading and seal welding tube ends over the tubesheet is out of question.

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