Re: Piping Flexibility

Many young engineers just throw darts blindly, trying to hit a target they do not even know what it means. I suggest to any young engineerwho wants to grow in this field, to start from the beginning. The stress analysis process shloul be:

1,. Type of analysis (Static/ dynamic, etc ????)

2.-Detect the problem (High stresses? High Forces ? High movements? Any combination of these?)
3.- Diagnose the problem (Where and why the the high values). It is key to know

       what is causing the problem.
4. Propose solutions ( add elbows, loops, define restraints like guides, directional stops, anchors, exspansion joints,add or eliminate restraints, relocate restraints)

Computer programs usually perform the task No. 2. They go through al the cumbersome mathematical calculations and give you quck and precise results. Obviously, how good this output it depends on the input. Remember, garbage in, garbage out.

Tasks 3 and 4 are the substance of it all. Many young engineers (and some no too young) just know how to throw data in the computer and know how to handle the software like SIMFLEX, CAESAR, etc. But whenit come to solving the problem, is when they start burning hours and hours just throwing darts in the air. Good and real stress analysts know how to detect, diagnose and propose solutions

which are safe, operable, maintenable, construible, cheap, and very quick.

Regards

Gerardo

"SARE, RALPH H." wrote:

> 319.7 Means of Increasing Flexibility. of b31.3
>
> The very first thing that a lot of piping designer do to increase pipe
> flexibility is to either add elbows or loops. However i have noticed that
> Very few understand that the objective of such excercise is to move the CG
> of the piping system away from the thrust lines. This concept is illustrated
> on Piping Engineering published by Tube Turns Inc.
>
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Received on Tue Jun 12 12:21:00 2001