Help in Caeser

Just my opinion.

1. You should break it up into manageable segments no less than:

• each pump station or part of a pump station
• each segment between the pump stations or part of a segment

2. With the information you have provided so far it is not possible to answer this question. Is this pipeline:

• all above ground?
• all underground?
• some above ground and some underground?
• What is the commodity?
• What is the Code"
• What is the Ambient installation Temperature?
• What is the maximum operating Temperature?
• What is the operating Pressure?
• Where is this project located (in general)?
  

3. If the pipeline is all above ground then the size and schedule of the pipe determines the maximum spacing of the pipe supports. If the pipeline is all underground then the pipe has continuous support.

4. You do not have CAESAR determine the support spacing. You set the spacing based on the pipe size and schedule then use CAESAR to check for issues related to normal Pipe Stress Analysis.

5. Yes. See #1.

As I said before you have not given us much information so we really do not have much to offer. Sorry!

1. It means that I select the segment between one pump station (lets say 100 km) atleast for analyzing.

2. the pipeline is all above ground. the code is B31.4. The operating temperature temperature and pressure is 35 degree Fahrenheit and 1644 psi respectively. The pipeline is between USA and CANADA.

3. Size and schedule is 18inch and 60 respectively.

Consider contacting the good folks at COADE for recommendations on your rather unique piping system.

This seems to be a case far from the ordinary, and, it sounds like you do not have a strong piping stress analysis background.

There is a great guy called Richard Ay who is very helpful there.

This is a legitimate copy of CaesarII that you are using.......Correct ????

Stress analysis is typically trial and error. I just did one on a few compressor stations that took me a month of moving supports to minimize loads.

The best thing to do is follow good engineering and design practices as a start for your spacing. You're not the first person to run a pipeline so you shouldn't try to start from scratch.

This spacing might be in the pipe design handbook or something. If you can't find it then you might want to do a trial and error analysis of 1 segment with 1 support at each end. Figure out your spacing from that and use that as a first guess in the real analysis.