| Applies To | |
| Product(s): | AutoPIPE Vessel |
| Version(s): | ALL |
| Area: | Material database |
| Date Logged & Current Version | March 2020 41.04.00.013 |
Problem:
How are the nominal design stress under normal operating conditions at test temperature and design (calculation) temperatures calculated in AutoPIPE Vessel for a material (ex. P355NL2)?
Solution:
For P355NL2:
|
fa = nominal design stress under normal operating conditions at test temperature. |
|
fTd = nominal design stress under normal operating conditions at calculation temperature. |
fa is equal to min(Rp0,2t/1.5,Rm/2.4) with Rp0.2t = 355 MPa and Rm = 490 MPa and consequently fa = 204.17 MPa
fTd is equal to min(Rp0,2t/1.5,Rm/2.4) with Rp0.2t = 325 MPa and Rm = 490 MPa and consequently fa = 204.17 MPa
In fa, the "test temperature" means ambient but the way to define the stress is the same as for fTd.
Where:
Rm = Minimum guaranteed tensile strength at room temperature.
Rp0,2/t = Minimum guaranteed yield strength 0.2 % at design temperature.