Interpretation of stresses at points

Greetings, Piotr, 

As you know, an AutoPIPE model is made up of pipe spools or fitting (i.e. elbow, tee, etc..). Your comment "AutoPipe shows calculated values of stresses at points which are located at joints between pipes and fittings", is confusing because there is nothing between the 2 items. 

Please provide a screen shot of exactly what you are talking about.

Regards,
Mike Dattilio
Design Analysis Engineering Group
Senior Analyst Bentley Systems Inc
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I assume the selected point lays between the elbow and the pipe. How can I find ot what are the values of stresses for the straight between this point and point S22? 

Regards,

Piotrek

Panie Piotrze,

Proponuję jedno z dwóch rozwiązań:

1. Można zaznaczyć opcję Intermediate stress points - tzn. wpisać ile punktów ma dodać (zagęścić siatkę MES) AutoPIPE. Jeśli naprężenia będa większe w tych pośrednich punktach - to zostaną umieszczone w raporcie. Jeśli nie - to nie będzie ich w raporcie. Opcja dostepna jest w Model Options > Results (prawa strona, poz. 13 od góry);

2. Ręczne wstawienie dodatkowych punktów na prostce. Zwykle to się stosuje jeśli na odcinku prosty ma Pan spoinę i trzeba zorientować się co w niej się dzieje.

Greetings Piotr, 

Ahh.. now I understand your question,

Please noted that every node point has a +ve (downstream) and -ve side (up stream). If the results are the same on both sides of the node point then only one set of results are reported. However if there is a difference, then both sides of the node point results are reported. 

With regards to elbows, they are comprised of 4 node points (TIP, Near, Far, and Mid)  A bend component really starts on the +ve side of the Near point and ends at the -ve side of the far point. For locations outside of the bend (i.e. both -ve side of the Near and +ve side of the Far) will be considered straight pipe.

Therefore to answer your question

"Which component do they refer to, if a point is located for example between a pipe and an elbow?"

Answer:

Straight  pipe stresses are calculated on the outside of a bend component and Bend pipe stresses are calculated on the a bend component.

As you know AutoPIPE will report stress at defined node points. There is a feature in the program where users can define intermediate points,  see the following AutoPIPE help section:
Help > Contents> Search Tab> enter "Intermediate stress points" (include the quotes), press List Topics button, double click on the selected topic from the list provided to see more information.  

Keep in mind that you can add additional node points (ex. S20 to S22), however suggest that you do not place a node point at the exact location as the bend's Near or Far point. Doing so may result in error message "E732-3: Not enough clearance to fit bend..". This message will prevent you from analyzing the model. 

 Regards,
Mike Dattilio
Design Analysis Engineering Group
Senior Analyst Bentley Systems Inc
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Dziękuję za odpowiedź.

Kind thanks for your reply.