i have a pipe (external diameter 212.2mm, thickness 3.8mm) and
so:
Pipe radius R=(212.2-3.8-3.8)/2=102.3mm=10.23cm

Pressure: 1bar.

I modeled a spool 1000mm lenght, anchor at both sides.
Material A106B, B31.3

Load case: only "P1" OPE because i want to read only force due to pressure.

By hand calculus:
P=F/S so i want calculate F=P*S

P= pressure inside pipe= 1bar=10N/cm2
S= area inside pipe = pi*R^2 = 3.14*(10.23)^2 = 328cm2

so i should have a force on both pipe sides (on both anchors) equal to:
F=P*S=3280N

BUT...
if i make this calculs by caesar i obtain on anchors 1368N only.

Where is the mistake? why caesar does't give me the real force due to pressure on anchors?

maybe i am too tired to see an incredible mistake in my hand calculus?

thank you