Dear,
Balkrishna,
Caeser does calculate the difference between maximum metal temp. as per
input given t1 ,t2,t3....& min. metal temp. as per input given in
configuration file .Caeser does considers a thermal cycles, as a default
value as per code ,if not given by the user.caeser does calculate the
reaction forces at support point ,as per the code requirement.
Regarding your concern about temperature input required for caeser ,there
is no such a requirement of temp. input required by caeser ,caeser will
take the temp. as input by the user whether as a t1 or t2 it has no
relation with design or operating.But not to forget that the temp t1 input
will govern your spring selection thats why peoples normaly prefer to input
t1 as a design temp. & t2 as operating temp.
Regarding your query about analysis temp. to be whether design or operating
consult your process engineer .or go through the design basis if available.
Regards,
Rajesh V Balapure
"balakrishnan"
<balakrishnan@ksr To:
<PipingDesign@yahoogroups.com>
c.com.kw> cc: (bcc: Rajesh V
Balapure/JAMNAGAR/RIL)
Subject: Re: [PipingDesign] Re:
Stress calculation
12/16/2003 01:04 Importance: Normal Sender's OU:
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PipingDesign
Friends,
I wish to get your valuable opinion on the following.
I am using CAESAR II for Stress analysis.
In CAESAR II , Temperature Input is required on the Spreadsheet .
As per my perception this is OPERATING Temperature
and
NOT DESIGN Temperature.
Further, I need some help in interpreting the Code requirements of Temperature Input in CAESAR II.
ASME B31.3 Clause 319.3.1 says:
"Thermal expansion Data
(a) Values of stress Range.
Values of thermal displacements to be used
in determining Total displacement Strains
for computing the Stress Range shall be determined from
Appendix C
as the ALGEBRAIC DIFFERENCE between the Value at Maximum Metal Temperature
and that at the Minimum Metal Temperature
for the thermal Cycle under analysis.
(b) Values for Reactions
Values of Thermal displacements to be used in determining
the Total displacement Strains
for computation of Reactions on Supports and Connected Equipment shall be
determined as the ALGEBRAIC DIFFERENCE between the Value at Maximum (or
Minimum ) Temperature
for the thermal Cycle under analysis and the Value at the Temperature
expected during installation."
From the above 2 sections (a) and (b),
it seems that we should Input the Algebraic Diffrence between
the Maximum Operating Temperature
and
the Temperature (Ambient) during Installation
for CAESAR II Analysis.
Regards,
Balakrishnan
> I also can help you with CAESAR II calculations. > How can you send me the isometrics? > > Dragos > > > > ======================================== > Discussion List sponsor: The fluid flow calculations website -www.LMNOeng.com - LMNO Engineering, Research, and Software, Ltd.
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