Hi all,

I am trying to reproduce an analysis realized with ROHR2 using CAESAR II for a cryogenic line operating at -165 °C according EN 13480. I found a difference in the allowable stress range (fa) calculation between the two applications.

Fa = U(1.25fc+0.25fh) (Eh/Ec)

CAESAR II  fa = 225 kN
ROHR2  fa = 253 kN

The different values are because how CAESAR or ROHR2 considers Eh and Ec. If Eh is for operating or maximum metal temperature and if Ec if for installation or minimum metal temperate.

Input
U=1
Fc=160 kN
Fh=155.78 kN
Eh/Ec = 0.943 for CAESAR
Eh/Ec = 1.06 for ROHR2

Do you have some query on this topic? Please could you help me with your interpretation on this topic?


Thanks in advance, regards,