Does not Thomas help you with your doubts?
Is this mail addressed to Caesar or piping design?
-----Original Message-----
From: PipingDesign@yahoogroups.com [mailto:PipingDesign@yahoogroups.com] On
Behalf Of Mohammad Danish
Sent: Sunday, June 18, 2006 7:31 AM
To: Loren Brown
Cc: jcluf01@yahoo.com; shivku_2000@yahoo.com; eliealtawil@yahoo.com;
tony@paulin.com; PipingDesign@yahoogroups.com
Subject: [PipingDesign] Caeser II, Technical Querry
Dear Mr. Loren Brown,
Please advice me on the following topic.
Design Code: ASME B 31.8
T1=70C
T2=120C
T3=130C
P1=1200KPa
Load Cases definition:
L1= (HYD) WW+HP L2=(OPE) W+T1+P1 L3= (OPE) W+T2+P1 L4= (OPE) W+T3+P1 L5= (SUS) W+P1 L6= (EXP) L2-L5 L7= (EXP) L3-L5 L8= (EXP) L4-L5 If I want to clear my system from stress code allowable then I should
check code allowable in load cases L6, L7, L8, and L5& L1.
The caser tips mention the following statement:
B31.1, B31.3 and similar codes do not consider OPErating case as a
stress case, and there are no allowable provided or code checks
performed
The general industry practice is to use operating case for the support
design.
If I am using design code ASME B31.3 then the Load cases L2, L3 & L4
shows value as zero and text as no code check processed.
On contrary if I am using ASME B31.8 then values are shown Load cases
L2, L3 & L4 and code check is done. Can you explain why?
Please clarify the following queries:
use all the eight cases mentioned above or not. In my case if I want
to print the code evaluation then it shows code evaluation Failed.
2. For B 31.3 code the code check is not processed for the operating
case as per the CAESER tips mentioned above. But this is not true
for B31.8? Please explain
3. Shall I use only L1,L5,L6,L7 & L8 to check code allowable and ignore
the operating Load cases L2,L3,L4.My system as per B31.8 passes all the
cases except L3 & L4.Shall I ignore it? Please clarify in detail.
Different engineers in the industry had different views. My senior
engineer says you had to check for L2 & L3.While the other engineer
working in a reputable companies working on CAESER II says no need to
check for L2, L3 & L5.There is confusion on this topic. Please explain
how CAESER software is working.
Thanks & Regards,
M. Danish
Tebodin & Partner LLC
-----Original Message-----
From: Loren Brown [mailto:lbrown@coade.com]
Sent: 30 May 2006 17:47
To: Mohammad Danish; jcluf01@yahoo.com; shivku_2000@yahoo.com;
eliealtawil@yahoo.com; tony@paulin.com; PipingDesign@yahoogroups.com
Subject: RE: Stress Analysi on Design temp or Operating temperature
I would definitely use the maximum operating temperature as this is what
your piping system will see in the worst case.
Regards,
Loren A. Brown
Senior Engineer
COADE Engineering Physics, Inc.
12777 Jones Rd., Suite 480
Houston, TX 77070
(281) 890-4566
Lbrown@coade.com
http://www.coade.com <http://www.coade.com/>
From: Mohammad Danish [mailto:mdanish@tebodin.co.om]
Sent: Monday, May 29, 2006 3:44 AM
To: jcluf01@yahoo.com; shivku_2000@yahoo.com; eliealtawil@yahoo.com;
tony@paulin.com; PipingDesign@yahoogroups.com
Cc: Loren Brown
Subject: Stress Analysi on Design temp or Operating temperature
Dear Friends,
Please advice me for doing stress analysis we should use design
temperature or Maximum operating Temperature?
If we refer CAESER II, Then the help says that among the 9 Temperature
fields the maximum operating temperature to be used.( Maximum operating
temp appears to be the maximum)
Please advice.
Regards,
Tebodin & Partner LLC
Md Danish
Jr Pipeline Engineer
tel. +968-2449 6077
fax +968 2449 7290
gsm +968 95525965
e-mail mdanish@tebodin.coom
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