Question:
Can you explain how AutoPIPE Vessel evaluates the modulus of elasticity in external pressure calculations according to EN 13445-3?
Why modulus of elasticity value is not being calculated as per Appendix O as referred in EN 13445-3 clause 8.5.2.2.
Answer:
According to EN 13445-3 clause 8.5.2.2, modulus of elasticity should be calculated as per Appendix O.
Appendix O provides polynomial expressions to calculate temperature-dependent material properties, including the modulus of elasticity.
Modulus of elasticity come from Material Data Base:
The values have been calculated using the equation O.4-1 with Table O-2, Material = Steel Group 1 to 4, 5.1 and 5.2, and rounded as shown below:
Z = C0 +C1T+C2 T^2
Where
-
-
- C0 = 213.13
- C1 = -0.06910
- C2 = -0.00001824
- T = 150 Deg C
-
Z = 202.38 rounded to 202 MPa
See Also