hai,
i am new commer to this fourms..i want to know how to model the end cap using caser..


thank you to all....

1) You've posted this in the wrong Forum. I'm moving this to the CAESAR II Forum.


2) You don't model "end-caps". CAESAR II evaluates the overall system behavior using the 3D Beam Element, with the assumption that the response of the system is dominated by bending. "End-caps" are irrelevant in this analysis - just end (stop) the model there.

if we are not add endcap we loose some system weight and also some length.any other alternate for this one..

hi,

if your so theoretical then model a rigid and the weigth of the cap on it.
the lenght is not necessary.

If one takes a cup of water from the worlds oceans then what effect will that have???

THINK of what you are doing this is a simplified analsysis and I cannot for the life of me think of one instance where a caps weight and volume would be critical to a systems design.

A Flange and Blind Flanges weights would be significant but not a welding cap....

that's Sir John...

"If one takes a cup of water from the worlds oceans then what effect will that have???"

Answer: Reduce Global Warming! So get out there with your cups to do your part!

we are doing high pressure and low temperature gas line analysis..in this analysis we facing sustained load case problem becase of pressure..we gave the support and solve the problem..in that analysis we gave support not only in +y direction we gave x direction restrained also..with out x restrained also the problem is solved..what is the difference b\w those two cases????...

thank you to all....

If you have a pressure related high stress and not bending related , then this can be solved by either reducing the pressure or by increasing the thickness, this cannot be solved by increasing supports. Pl. check the "stress extended" report to undestand if pressure induced axial stress was the problem or bending induced. My understanding is that you had bending related problem and not due to pressure .

Also pl. write your question in proper english and complete sentences , so that others can understand what you are saying.

Regards

Perhaps you are including the Bourdom pressure effects in your analysis? If so, then restraints may affect stress since these restraints will control Bourdon deflection and related bending.

sorry anindya for my sentence error.i try to make sentence correctly. i want one clarification from your answer .how the bending happen?
what i feel bending is happen due to sustainde loads(weight,pressure,etc.,),so that only i mentioned the problem may come because of pressure(pressure is consider as a sustained load).

sorry anindya for my sentence error.i try to make sentence correctly. i want one clarification from your answer .how the bending happen?
what i feel bending is happen due to sustainde loads(weight,pressure,etc.,),so that only i mentioned the problem may come because of pressure(pressure is consider as a sustained load).

Do you think pressure can create bending ( unless of course you are considering bourdon effect which is typically treated as a secondary effect analogous to thermal expansion) ? Bending is created by dead wt. of pipe along with wt. of fluid, valves, insulations etc. Honestly, do you really need to ask this question to find out how bending is created in piping systems? You should know it from a course of Strength of materials which you must have taken ( I presume you hold an engineering degree/ diploma).

My advise for you will be to:

1) Read/Brush up Strength of materials.

2) Read B31.3/B31.1 code.

3) Improve your english.

4) If you can't do the above three ,do something else other than pipe stress analysis.

Regards

thank you for your advice.

We do not require our customers to speak perfect English. Please refrain from this criticism, as it is a derogatory and ethnocentrist.

Appendix 1

• Hydrostatic Test
Case1 (HYD) = WW+HP+F1
• Operating plus PSV Relief Load
Case2 (OPE) = W1+D1+T1+P1+F1+F2
Case3 (OPE) = W1+D2+T2+P1+F1+F2
• Sustained Case
Case4 (SUS) = W+P1+F1
• Sustained plus Wind
Case5 (OCC) = W+P1+F1+WIN1
Case6 (OCC) = W+P1+F1+ WIN2
• Operating plus Wind
Case7 (OPE) = W1+D1+T1+P1+F1+WIN1
Case8 (OPE) = W1+D1+T1+P1+F1+WIN2
• Thermal Case
Case9 (EXP) = Case2 – Case4
Case10 (EXP) = Case3 – Case4

Appendix 2

• Hydrostatic Test
Case1 (HYD) = WW+HP
• Operating Case
Case2 (OPE) = W1+D1+T1+P1+F1
Case3 (OPE) = W1+T2+P1+F1
• Sustained Case
Case4 (SUS) = W+P1
• Sustained plus Wind
Case5 (OCC) = W+P1+WIN1
Case6 (OCC) = W+P1+ WIN2
• Operating plus Wind
Case7 (OPE) = W1+D1+T1+P1+F1+WIN1
Case8 (OPE) = W1+D1+T1+P1+F1+WIN2
• Thermal Case
Case9 (EXP) = Case2 – Case4
Case10 (EXP) = Case3 – Case4

from the above two case the load F1 uses in both cases but the second case do not include the F1 in the Hydrostatic Test,Sustained Case.why?..i want some idea about those two case(only based on the load F1)..normally the load is to be consider in Hydrostatic Test and Sustained Case(if may wrong).please give the solution..

Appendix 1 ? 2? F1? F2? I am puzzled and bewildered

pktmurugan

Please do not "double post".

Also, this should really have been a different topic.

ok.we account the load(example;pressure valve relief load or well head displacement load)are come in the all the cases of stress analysis.in my previous problem they took the load in the operating load case only(Appendix 2)why?..the load above mentioned are should taken in the Hydrostatic Test and Sustained Case also...why..any reason for this one..

Anindya is trying to help the newcomer to forum and his advise to ask the questions specific and clear so that the forum member can understand and respond. Otherwise member of the forum will try to avoid reading such type of questions and also it may happen, member can shift to other forums.
I appreciate the newocomers curiosity to learn the things fast, they should have patience, investigate as much as they can on their own and place the questions to the experienced members of this forum.
I hope the beginers to this forum can understand the views of experienced members.