How are is the Time Independent Design Stress, f, calculated according to EN 13480-2017 in AutoPIPE for Austenitic Steels (A > 35%)?
Given that there are two equations provided in 5.2.2-1:
(1) f = Rp1.0,t/1.5,
(2) f = min(Rm,t/3 ; Rp1.0,t/1.2)
When both the material properties Rp1.0t and Rmt are available, is a particular one of the equations used by AutoPIPE to calculate the design stresses?
For example, material 1.4301 at room temperature, has properties Rm = 500 MPa (minimum), and Rp1.0 = 230 MPa.
Using equation (1) f = 230/1.5 = 153.33 MPa but using equation (2) f = min(500/3, 230/1.2) = min (166.66; 191.66) = 166.66 MPa.
AutoPIPE appears to use the value of 153.33 MPa in the subsequent calculation of allowable stresses, rather than 166.66 MPa, if so, why is this the case?
Good day to you Rohinee
This was a good enough topic to turn into a WIKI page here.
If you have any further comments, please add them to the forum page here.
Regards,Mike DattilioBentley Product Advantage Group Senior AnalystBentley Systems Inc=============================================================================
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