08. Explain Load Controlled Buckling check “stress value” and "allowable value” in AutoPIPE's output


Applies To
Product(s):AutoPIPE
Version(s):ALL;
Area: Report
Date Logged
& Current Version
April. 2014
09.06.00.19

Problem:

Regarding the LCC (Load Controlled condition) check according to DNV 2012 (section 5 – equation 5.19).

In the AutoPIPE output, for Load Controlled Buckling check (see figure below) the “stress value” and the “allowable value” are reported: please could you explain what are the meaning of these values ( values like 0.001 N/mm2 and 0.007 N/mm2 respectively) ? how these values are calculated ?

Solution:

Notice that some values are displayed in front of Stress and Allowable rows under "Maximum load controlled buckling stress ratio". There are no stress or allowable values for this category, only an interaction ratio should be displayed.

This has been logged under TFS-D119449, and will be added to AutoPIPE V8i 09.06.01.xx and higher.

First Affected version = 09.06.00.19
Fixed in version = 09.06.01.10 and higher
Logged = TFS-119449

See Also

DNV Piping Code Calculation

Bentley AutoPIPE