ASME Pipe recommended courses 2

[pegus]

Good day,

I would like to learn how to use ASME B31.1 to validate a pipe line. Regularly, what I have done is perform a simple FEA analysis on ANSYS with pipe elements (beam) and compare the ¨maximum combined stress¨ obtained from the ANSYS stress results and compare it against the allowable stress dictated by ASME B31.1.

I believe ASME B31.1 has its own considerations to compute the stresses and compare that to the allowable at hot and cold conditions. But when I have read the code I can not fully understand it.

Can you please recommend to me a course that can explain this to me in further detail? I would like to learn what stresses do I need to compute and how to do it with my FEA software.

Thanks in advance,

P.P.

 

[MJCronin]

pegus....

By "validate" I assume that you wish to perform a stress analysis of a piping system in accordance with the rules of ASME B31.1, evaluate the calculated stress levels and compare them with the allowable stress for the material you have selected. Is that correct ?

ANSYS may not be the best computational tool for this task. WAy, way too much computational overkill.... Kinda like using a backhoe to kill ants...(IMHO)

There are more suitable software packages on the market specifically designed to perform a "ASME code required flexibility analysis" using the component flexibility factors and stress intensification factors found in ASME B31.1 and B31.3 ( as well as many other international Codes and Standards. They have been in active use for decades.

The most popular software for piping system stress analysis is CAESAR-II by the COADE (now HEXAGON) corporation. I have used it since the mid 1980s.

https://hexagonppm.com/offerings/products/caesar-ii

There is plenty of information on the internet about what piping stress analysis is and how software should be used for evaluation of systems.

There is also a "COADE Inc; CAESAR II" forum on this engineering tips website that you may visit

This might also help:

https://www.csemag.com/articles/how-to-perform-a-pipe-stress-analysis/

https://www.littlepeng.com/single-post/2020/03/11/10-introduction-to-pipe-stress-analysis

https://www.pveng.com/home/pipe-stress-analysis/types-of-stresses-in-piping-systems/

MJCronin
Sr. Process Engineer

 

[pegus]

Thanks MJCronin,

Yes, I would like to perform a stress analysis to compare it against the code allowable.
The thing here is that my company only counts with ANSYS, I was trying to find a way to perform it in there.

Regards,

P.

 

Remember that becoming a good piping design engineer is a long process, and an entire career for many. Don't think you will pick it up by taking one course, no matter how good it is.

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."

 

[GD2]

Pegus,

For a moment I was a bit confused when you linked ASME 31.1 to pipeline. Usually, a pipeline system means a transportation line with related codes like ASME 31.4, 31.8 etc.

It seems you desire to know the background about what goes into a computer program when you do a stress analysis.

I don’t think there is any course that will exclusively talk about stresses. For piping, ASME 31.3 course is very common. Likewise for pressure vessels, ASME BPVC sec VIII Div 1 is very common. Almost all these courses will talk about stresses, what are these, where from it comes, and what allowables are required to be verified under different load(stress) conditions.

Once you get your fundamentals right, it will be much easier for you to understand your work when you do a computer analysis.

GDD
Canada