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#44865 - 09/21/11 10:21 AM Element rigid weight...
RKJ2011 Offline
Member

Registered: 07/28/11
Posts: 27
Loc: Mumbai
Hallo Forum,

I have a element defined as rigid (Rigid wt entered as 1000 N). In this element insulation thickness and density is also defined. CAESAR II automatically includes 1.75 times the insulation weight of equivalent straight pipe to this element.

So total wt of the element becomes 1000 + 1.75 times the insulation weight of equivalent straight pipe.

Can you pl give the reason for taking 1.75 time of the insulation weight for rigid elements.

Regards
RKJ

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#44870 - 09/21/11 11:57 AM Re: Element rigid weight... [Re: RKJ2011]
MoverZ Offline
Member

Registered: 11/22/06
Posts: 1195
Loc: Hants, UK
I believe it is intended to be an estimate of the actual weight of insulation over a valve, which is usually much larger in diameter than connected pipe. Thus the valve or rigid insulation will be significantly heavier.

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#44878 - 09/21/11 11:12 PM Re: Element rigid weight... [Re: RKJ2011]
Richard Ay Offline
Member

Registered: 12/13/99
Posts: 6226
Loc: Houston, Texas, USA
Exactly.
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Richard Ay - Consultant

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#69193 - 06/08/17 12:22 AM Re: Element rigid weight... [Re: RKJ2011]
Shahid Rafiq Offline
Member

Registered: 05/17/06
Posts: 144
Loc: Abu Dhabi UAE
Even when there is no insulation, the some weight is added.
What is that weight?
Example, I have an element (modeled for experiment). 8" Sch. 40. Length 1m.
Whole element made rigid with 2000N weight.
No insulation.
Fixed at one end other end free (cantilever).
The total weight on the fixed end comes out to be 2316N. So what is the logic / basis of adding 316N to the rigid element?


Edited by Shahid Rafiq (06/08/17 12:25 AM)
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Shahid Rafiq

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#69194 - 06/08/17 12:25 AM Re: Element rigid weight... [Re: RKJ2011]
Shahid Rafiq Offline
Member

Registered: 05/17/06
Posts: 144
Loc: Abu Dhabi UAE
Is it the fluid weight?
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Shahid Rafiq

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#69202 - 06/08/17 07:45 AM Re: Element rigid weight... [Re: RKJ2011]
Dave Diehl Offline
Member

Registered: 12/14/99
Posts: 2382
Loc: Houston, TX, USA
I would have to think so. The total weight applied to rigid elements is the user entered weight, 1.75 times the straight pipe insulation weight per length, and the fluid weight.

In the output, click on Input Echo, then Pipe Properties #1. You will see the weight per unit length for each component - broken down into its several categories (pipe, fluid, insulation, refractory).
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Dave Diehl

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