I am an engineering student designing a pipe system for a fluid flow and I calculated everything including the pressure loss. Now I have to choose a pipe material and pipe thickness for the piping system and I realized that I don't know the exact pressure in the pipe. I tried to calculate the pressure from the 'Bernollie Equation' but I cannot calculate it there either because I don't have a reference pressure point.
To explain it better, let's say I have a closed square system in the horizontal plane. The system contains 4 elbows 4 straight pipes and a pump that makes the circulation. If I know everything about the flow ( flow rates, density, viscosity, etc.) how can I calculate the maximum pressure in the pipe will encounter?
Sorry for my bad English, If there is a part that is not clear I can try to explain it again.