×
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

Requirements on Column w/Seal Welded Trays

Requirements on Column w/Seal Welded Trays

Requirements on Column w/Seal Welded Trays

(OP)
Would anyone please shed some light on minimum design considerations required on vessel with seal welded trays?
Situation: One of the tower has four (4) wash trays (bubble cap, classified as critical service trays, ) at the top section. To meet the leakage test requirement of 1" of water in 5 minutes during field testing of trays, as specified on specification, trays require seal welding of panel to support ring and also panel to panel per tray vendor, and I have never come across this situation before. If trays are seal welded to the support ring and also the abutting panels, how can inspection be done once vessel comes in operation as these trays literally creates 5 different isolated chambers as chimney tray does without any access to them. I believe that these trays will have to be discarded whenever the trays are dismantled for vessel. Thank You
 

RE: Requirements on Column w/Seal Welded Trays

PVdesigner,
It sounds kind of bad joke or a bad translation from chinese. The seal weld of the tray to the support ring can only performed from underneath of tray, but the abuting panels should have raised flanges, which can only be seal welded from above the tray. That means, you need access from top and bottom of these trays. Also, it would be impossible to seal weld the panel edges where they meet at their circumference.
However, if for any reason you need to control the leakage during the testing of those trays, I would think the bottom seal weld would suffice. After tests completed, you only need to grind off each seal weld, removing the trays one by one, starting from the bottom and making your way up to the first tray.
Also, I never heard of creating pressurrized chambers between the bubble trays, but if it is true, I would like to know how's that working.
Cheers,
gr2vessels

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