×
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

Cone Bottom Hopper Tank

Cone Bottom Hopper Tank

Cone Bottom Hopper Tank

(OP)
I have a customer requesting a cone bottom hopper tank for use in storing drilling mud.  The design that has been suggested is a 24'-0" high by 10'-0" diameter tank with a 3/8" thick ASME flanged and dished head for a roof, 1/4" plate for the shell and a 1/4" cone at the bottom with an angle of approximately 60 degrees.  There will be a compression ring at the shell to cone intersection. The mud will be pushed out through a flanged connection at the bottom of the cone.

My concerns lie in the fact that in order to agitate the mud to get it flowing, air will be injected into the tank, bringing the internal pressure up to 14.6 psi for extended periods of time.

We have constructed drums before with two ASME flanged and dished heads and 1/4" shells.  These were non-registed/non-labeled vessels with a maximum operating pressure of 14.6 psi.  I know that the roof of the mud tank can stand these pressures, but I am wondering if the cone will.

I anyone has any experience in the design or use of tanks such as the one I have described above, your comments would be appreciated.

RE: Cone Bottom Hopper Tank

merton,

Cone shaped heads can be evaluated in accordance with the rules of ASME Section VIII- Division 1. Simply because the vessel or tank does not fall under the ASME code, doesn't mean that you cannot use the rules.

The code rules contain limitations on the cone angle.

Good luck


MJC

RE: Cone Bottom Hopper Tank

MJCronin is correct re ASME Section VIII, Div 1 if included angle of cone does not exceed 60degrees.
API 620 provides design formulas cones & compression rings, for tank pressures to 15 psig, without limitation on included cone angle.

RE: Cone Bottom Hopper Tank

I am curious on how to determine tmin for a bottom cone hopper.  The coned part of the tank.

RE: Cone Bottom Hopper Tank

How do you determine adequate thicknesses? sure it is a factor of static head and pressure...

RE: Cone Bottom Hopper Tank

Two option using (1). STADD PRO 2004 Structural program temp. www.reiusa.com

or (2). Codeware Compress Pressure Vessel Software www.codeware.com

lst

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