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


design of temporary saddles for hydrotest

design of temporary saddles for hydrotest

design of temporary saddles for hydrotest

hi dears
we have a thin long tower(max shell thk.= 28 & length =80m & Od.=7250). I designed at least 4 temporary saddles for hydrotest at shop by ANSYS workbench. but the stress at horn of saddle in the analysis is too large and I have to add 2 extra saddles.
the stress in shell is reduced but stress in corn of saddles (near to horn) is too large.

please guide me the categories of stress in saddle according to ASME Sec VIII Div2 (primary and secondary) , also allowable stress in this case for shell and saddle separately.

thanks alot

RE: design of temporary saddles for hydrotest

pressure vessel is going to b sideways for the hydrostatic test in the shop, right?

What do your saddles look like? Where are they?

No drawing = No help is possible.

RE: design of temporary saddles for hydrotest

Please clarify, are you concerned with the stresses in the saddle or the vessel shell?

RE: design of temporary saddles for hydrotest

Try in vertical position. Hence you check the concrete foundation too.


RE: design of temporary saddles for hydrotest

Why submit the concrete foundation to the weight of a full hydrotest? It probably is not designed to take such a load if the Column is a distillation column.

Are you assuming "ideal" weight distribution on each of the saddles or have you analysed the situration exactly?

As racookepe1978 says a drawing/sketch of the situation says a thousand words.

RE: design of temporary saddles for hydrotest

We are waiting more information from avator 64(OP)
This is an economic problem for hydrostatic test (horizontal or vertical)
a) cost of saddles (visual inspection is not accessible under saddles)
b) cost of concrete foundation (visual inspection is 100% accessible in vertical position)


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!


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close