×
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

Type of roof for Storage Tanks

Type of roof for Storage Tanks

Type of roof for Storage Tanks

(OP)
Can anyone tell me the criteria for selection of type of roof for storage tank ( Cone type, Dome type and Floating)

RE: Type of roof for Storage Tanks

The type of roof chosen can be based on a number of factors, such as tank diameter,Construction costs, product stored, tank operating pressures, sensitivity of the product to internal corrosion etc.

Using the diameter criteria eg: For tanks up to 10m a self supported cone could be used, 20-30m a supported cone roof and a 40m plus dia a dome roof (probably a geodesic dome) may be considered.

At the end of the day its an engineering judgment call or based on client requirements.

Hope this helps

RE: Type of roof for Storage Tanks

To a certain extent, the roof type is also determined by government regulations.

Generally, a light product (gasoline, for example) is going to require either an internal or external floating roof or some type of inerting/ vapor recovery system.  The exception being smaller tanks.

Generally, a heavy product (diesel, fuel oil) can be stored in a fixed-roof tank wtih no floater.

For a small tank, a self-supportign roof is easiest, for a large tank, a structuraly supported cone roof.

RE: Type of roof for Storage Tanks

This is all very interesting and roof selection and design is discussed in detail in the excellent Phillip Meyers book.

But....

What I have always wondered is:

-  When is an umbrella roof selected over a cone roof ?

and

most importantly,

Under what non-subjective criteria is a domed roof the best choice ?

No, feelings, sentiments or recollections please....

Give me a hard reference for domed roofs....

regards

-MJC  

   

RE: Type of roof for Storage Tanks

For domed roofs specifically (as opposed to umbrellas), the main motivation that would require their use would be relatively high pressures.  Such tanks are not common.

In most cases where an umbrella is used, a self-supporting cone could also be used.  The choice between the two involves owner preference and cosmetics more than anything.  At the upper limits of size, a self-supporting cone will be very steep.

RE: Type of roof for Storage Tanks

For mid range diameter tanks ( 15-25m where a self sup cone wont work) another reason for using umbrella roofs is when internal cleanliness or corrosion is an issue. eg in a caustic tank or similar where corrosion on supporting members could discolor the product.

 

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