| Applies To | |
| Product(s): | AutoPIPE Vessel |
| Version(s): | ALL |
| Area: | General |
| Date Logged & Current Version | Jan 2024 44.00.01.014 |
Problem:
Allowable longitudinal compressive Stress (σ c,all) is not calculated as per EN13445-3 Clause 16.14-29, Why?
Instead design stress value is taken as allowable longitudinal compressive stress. Please clarify.
Solution:
Allowable longitudinal compressive stress value shown in report is correct.
Refer clause 16.14.8, this clause clearly says if equation 16.14-15 satisfied then design stress can be taken as allowable longitudinal compressive stress.
In this case (Operating Corroded condition),
Mean Diameter (D) : 855.4 mm
Thickness (ea) : 34.7 mm
Modulus of elasticity (E) : 189000 MPa
Sigma e : 105.6 MPa
D/ea (24.65) ≤ 0.06 * E / Sigma e (107.38)
As equation 16.14-15 satisfied design stress value (126.7 MPa) is taken as allowable longitudinal compressive stress.