Load Cases in pipe stress analysis

Load case description 1. Piping loads 1.1. Sustained loads: Loads due to pressure, weight and other sustained loads in piping system at temp & pressure 1.2. Displacement loads: loads due to thermal expansion/contraction using max temp differential between installation & opertation 2. Load case analysed L1 L2 L3 L4 L5 L6 L7 L8 L9 L1 0 L1 1 L1 2 L1 3 L1 4 L1 5 L1 6 L1 7 L1 8 L1 9 L2 0 L2 1 L2 2 L2 3 L2 4 L2 5

WW+HP W+T1+P1+F1 W+T2+P2+F1 W+T1+P1+F1+U1 W+T1+P1+F1-U1 W+T1+P1+F1+U2 W+T1+P1+F1-U2 W+T1+P1+F1+U3 W+T1+P1+F1-U3 W+T1+P1+F1+WN1 W+T1+P1+F1+WN2 W+T1+P1+F1+WN3 W+T1+P1+F1+WN4 W+T2+P2+F1+U1 W+T2+P2+F1-u1 W+T2+P2+F1+U2 W+T2+P2+F1-U2 W+T2+P2+F1+U3 W+T2+P2+F1-U3 W+T1+P1+F1+WN1 W+T1+P1+F1+WN2 W+T1+P1+F1+WN3 W+T1+P1+F1+WN4 W+P1 W+P2

Hydro test Design load case @ T1 , P1 Operating load @ T2 & P2 Design lo load ca case wi with ea earthquake +x Design load case with earthquake -x Design lo load ca case wi with ea earthquake +y Design load case with earthquake -y Design load case with earthquake +z Design load case with earthquake -z Operating load case with wind -x Operating load case with wind +x Operating load case with wind -z Operating load case with wind +z Design load case with earthquake +x Design lo load ca case wi with ea earthquake -x -x Design load case with earthquake +y Design load case with earthquake -y Design load case with earthquake +z Design lo load ca case wi with ea earthquake -z -z Operating load case with wind -x Operating load case with wind +x Operating load case with wind -z Operating load case with wind +z Sustained load case Sustained load case

Hydro Operating Operating Occasional Occasional Occasional Occasional Occasional Occasional Occasional Occasional Occasional Occasional Occasional Occasional Occasional Occasional Occasional Occasional Occasional Occasional Occasional Occasional Sustained Sustained

L26 L27

T1+F1 T2+F2

Expansion stres check for T1 Expansion stres check for T1

W = Weight of content WW = Weight of Water P1 = design pressure T1 = Design temp P2 = operating pressure T2 = operating temp F1 = force and moment U1 = earthquake gravitational acceleration constant in x U2 = earthquake gravitational acceleration constant in y U3 = earthquake gravitational acceleration constant in z WN1 = wind in -x WN2 = wind in +x WN3 = wind in -z WN4 = wind in +z

Expansion Expansion