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#38107 - 09/28/10 10:08 PM piping stress analysis
vineet_sharma Offline
Member

Registered: 09/28/10
Posts: 9
Loc: india
i am new to the piping stress analysis. i am using CAESAR II. Please suggest me the what should be my approach towards it so that i can learn quickly. Please also suggest me the websites and books for this field.
Thank you.

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#38108 - 09/28/10 10:08 PM Re: piping stress analysis [Re: vineet_sharma]
vineet_sharma Offline
Member

Registered: 09/28/10
Posts: 9
Loc: india
vineet sharma

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#38109 - 09/28/10 10:40 PM Re: piping stress analysis [Re: vineet_sharma]
the_dude Offline
Member

Registered: 01/20/05
Posts: 76
Loc: Singapore
1. Work under an experienced piping stress engineer who has practical in-field experience.
2. Read and become familiar with the code. Do wall thickness, branch reinforcement calcs etc so that you become familiar with different parts of the code and so that you can differentiate between the different types of piping design. This will also introduce you to the B31.3 (or other code) tables and appendices which is where CII gets all of its data from (ie: stress allowables, weld efficiencies etc).
3. Try and get field experience.
4. Read Peng's Pipe Stress Book, and Chuck Becht's guide to using B31.3 book. Both books are excellent and complement each other.
5. Don't rush your learning. The past year I have spent troubleshooting piping problems on site and re-doing stress analysis on lines that required modifications for one reason or another, it's completely changed the way I approach pipe stress problems. Prior to this year I thought I was fairly competent and practical, but in hindsight I was just a computer monkey.


Edited by the_dude (09/28/10 10:42 PM)
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#38110 - 09/28/10 10:49 PM Re: piping stress analysis [Re: the_dude]
the_dude Offline
Member

Registered: 01/20/05
Posts: 76
Loc: Singapore
Basically all of the above will happen if you are working under a logical and experienced supervisor, as they should guide you. Just be upfront about your level of experience when applying for a job and if they hire you then they should look after you.

Your supervisor should not let you take on work beyond your capabilities, and you should make sure you are not in a position where you do not have support.

If you are trying to teach yourself and then get a job after, then that might be quite difficult and you might be exposing yourself to some stressful times, as the employer may hire you expecting you to be the answer to their needs, and you may not get the supervision you need to develop.
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#38131 - 09/30/10 12:54 AM caesar load cases [Re: vineet_sharma]
vineet_sharma Offline
Member

Registered: 09/28/10
Posts: 9
Loc: india
how load cases are formed in caesar? i dont understand why we first add wind load ( or occasional loads) to operating load cases and then subtract the respective operating load case to get again wind load. this load is now then added to sustained load case which is then used to calculate stresses.

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#38140 - 09/30/10 11:35 AM Re: caesar load cases [Re: vineet_sharma]
Richard Ay Offline
Member

Registered: 12/13/99
Posts: 6226
Loc: Houston, Texas, USA
If you have a system with non-linear boundary conditions you can't simply run a load case with "Win1". You "may" get different results then (OPE+Win1) - (OPE). It depends on how the non-linear supports behave.
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Richard Ay - Consultant

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#38216 - 10/05/10 03:25 PM Re: caesar load cases [Re: Richard Ay]
pipengg306 Offline
Member

Registered: 10/01/10
Posts: 12
Loc: Italy
Hi Richard Ay

Iam new to stress analysis. Can any one help me how to build up laod cases for both Satic and Dynamic.


Pls Hlp me
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PCANIL

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#38218 - 10/05/10 10:40 PM Re: caesar load cases [Re: pipengg306]
the_dude Offline
Member

Registered: 01/20/05
Posts: 76
Loc: Singapore
Have you read the CII manuals? They have a lot of information that you might find interesting. There is a whole section on load cases.
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