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#53932 - 04/13/13 03:51 AM Pipe stress analysis
katsina Offline
Member

Registered: 04/13/13
Posts: 1
Loc: Port Harcourt, Nigeria
I am using CASAR II to determine the stress analysis of a 33km pipeline from one flowstation to another.
The design parameter are: Design pressure 100bar, operating pressure 70bar, design temp 60 deg., operating temp 35 deg, API 5L X52 Pipe, Nominal pipe size 6", sch. 120,.

I want to know how to use Caesar II in modelling from piping to pipeline.i.e from the flowstation to the undergound pipeline.

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#53935 - 04/13/13 10:52 AM Re: Pipe stress analysis [Re: katsina]
Richard Ay Offline
Member

Registered: 12/13/99
Posts: 6164
Loc: Houston, Texas, USA
There is a "buried pipe" example in the Applications Guide. Review this first.
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Richard Ay - Consultant

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#53998 - 04/17/13 10:53 PM Re: Pipe stress analysis [Re: katsina]
Anuj_gupta1116 Offline
Member

Registered: 04/14/13
Posts: 27
Loc: abiline
Dear all Good Mornning,

I have doubt on Displacment input.

In my case my starting node 10 is butt weld to tank nozzle. So in model i put anchor on that give connecting node "11" on that, then put the displacment value at connecting node 11. But When i run it in restraint Summary Only forces value is showing , Moments is all ZERO.

Why moments not showing in Report. Kindly tell me.

Anuj Gupta
Piping Stress Engineer
------------------------
It's A Wonderfull Day
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A Gupta

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#54002 - 04/18/13 02:08 PM Re: Pipe stress analysis [Re: katsina]
danb Offline
Member

Registered: 04/22/05
Posts: 1426
Loc: ...
You need to specify also rotational displacements even these are 0, otherwise cnode 11 is free to rotate.
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Dan

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#54010 - 04/18/13 10:06 PM Re: Pipe stress analysis [Re: katsina]
Anuj_gupta1116 Offline
Member

Registered: 04/14/13
Posts: 27
Loc: abiline
Dear dan

Good Morning

Yes you are right, Yersterday i solved this problem.

Thanks for this guidance.
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Thanks & Regards

A Gupta

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#54021 - 04/19/13 08:06 AM Re: Pipe stress analysis [Re: katsina]
Richard Ay Offline
Member

Registered: 12/13/99
Posts: 6164
Loc: Houston, Texas, USA
Be careful with specifying displacements. A blank field means that DOF is free. A zero means that DOF is fixed with a displacement of zero magnitude.
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Richard Ay - Consultant

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#54044 - 04/21/13 10:49 PM Re: Pipe stress analysis [Re: katsina]
Anuj_gupta1116 Offline
Member

Registered: 04/14/13
Posts: 27
Loc: abiline
Dear all,

Good Morning

Kindly tell me some basic fundamental of analysis, like if our axial laod is greater then allowable loads so we can use taflon pad (mu-0.1). So
what's the other fundamentals for Longitudanal & Circumferential Forces & Moments.

Have a great day
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Thanks & Regards

A Gupta

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#54050 - 04/22/13 02:26 AM Re: Pipe stress analysis [Re: katsina]
MoverZ Offline
Member

Registered: 11/22/06
Posts: 1195
Loc: Hants, UK
Anuj,

Since you sign yourself as a 'piping stress engineer', you should be answering these questions yourself.

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#54080 - 04/22/13 09:44 PM Re: Pipe stress analysis [Re: MoverZ]
Anuj_gupta1116 Offline
Member

Registered: 04/14/13
Posts: 27
Loc: abiline
Good morning smile

Yeah sure i will find it.

But have you pdf of L C Peng. Currently i am reading Sam Kannappan's Introduction to "PIPING STRESS ANALYSIS".

If you have LC PENG's Book for stress analysis Kindly send me at my Email;- anujgupta1116@gmail.com
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A Gupta

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#54110 - 04/23/13 09:50 PM Re: Pipe stress analysis [Re: katsina]
Richard Ay Offline
Member

Registered: 12/13/99
Posts: 6164
Loc: Houston, Texas, USA
You should buy this book, it is a copy-righted work. You want to get paid for your work right?
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Richard Ay - Consultant

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#54113 - 04/23/13 10:11 PM Re: Pipe stress analysis [Re: katsina]
Anuj_gupta1116 Offline
Member

Registered: 04/14/13
Posts: 27
Loc: abiline
Ok Richard
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A Gupta

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#56046 - 09/02/13 05:18 AM Re: Pipe stress analysis [Re: katsina]
Anuj_gupta1116 Offline
Member

Registered: 04/14/13
Posts: 27
Loc: abiline
Dear Sir,

Kindly Give me Exact answer of " Why we can not check Stress in Operating Condition?"

as i know to check this we use Appendix P option but i want to know What is the reason behind that caesar cant perform stress checking in operating condition.
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Thanks & Regards

A Gupta

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#56048 - 09/02/13 06:23 AM Re: Pipe stress analysis [Re: katsina]
SJ Offline
Member

Registered: 11/14/09
Posts: 276
Loc: India
Go through the code.I suppose you're using B31.3. See for yourself are there any allowable or equations for operating stresses??

You'll get your answer. Also, your interpretation about App P need to be revisited. May be you can ask your seniors for more guidance.
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Keep Smiling

SJ

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#56071 - 09/04/13 09:32 PM Re: Pipe stress analysis [Re: Anuj_gupta1116]
Richard Ay Offline
Member

Registered: 12/13/99
Posts: 6164
Loc: Houston, Texas, USA
Read this earlier thread, which is a "sticky topic" at the top of the Forum.
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Richard Ay - Consultant

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