Segmented Shell of an LPG Tank

Why not join the controlling authority and ask them for help.

Student Membership - ASME

Lyn;

I am already a member but i still don't know where to post my questions ?!

One hint: do you know what size plates are generally available?

bigg;

The largest plates are 110 mm in thickness, of up to 4000 mm in width and in length of up to 12000 mm

I wonder if a "Buckyball" scheme of mostly hexagons, with 12 pentagons, has ever been considered (each polygon being pressed spherical).

I don't understand what you are asking....

Good information here:

http://www.engr.colostate.edu/~dga/mech325/handouts/pressure_vessels.pdf

http://www.pveng.com/FEA/FEASamples/Sphere/Sphere.php

MJCronin;

I have asked you these questions before :

1- How to choose the most rational segmentation of the shell ?

I apologize, I have never heard the phrase "rational segmentation" before with regard to pressure vessels.

However, if I google the words "rational segmentation spherical plates" I get:

http://www.dillinger.de/dh/produkte/komponenten/wv_kugelsegmente/index.shtml.en

Is this the information you are looking for ?

Thank you for you help
i have found this doc before but i still don't have an answer to my question.

I am going to make an assumption here that, if wrong, disregard this response. I am assuming you are about to 'graduate' from an engineering school, not a technical design school.

Good engineers, eventually, should advance the knowledge base, not just settle on the status quo. In other words, write the cookbook, not just read it. For you to perform the complete design of a sphere using current 'best practice' would be a massive project, but it shows novery little understanding of the underlying principals. What would be a better project, in my opinion, would be to improve the current practice. Optimize the design - one aspect might be an optimization analysis of the shell segments to reduce waste without unduly increasing the quantity of weld. You have already been provided (in this or a previous post) with a link to a study of the possible benefits of installing the legs a different way. You could use it as a model.

Thank you so much for your kindness and your help.I am about to graduate from an engineering school and i know that my project is massive but am trying my best to achieve it.Like you said Optimizing the design could be a much better project but i don't have to possibility to change my project.

Thanks again for your inspiring response i really appreciate it

What are the specifications for 'rational'? Maybe you need to take some class on defining the problem before you graduate.

I don't want to be rude but if you are not able to see the problem than maybe you should start painting for living

In contrast to irrational, such as pentagrams and rhombi.