Pipe
Introduction
The pipe unit operation can be used to model pipe section where the pipe is very complex, makes use of heat transfer, has multiple phases, or experiences choking. Since the pipe calculation is more rigorous and costly, in most cases the pipe option inside the valve van be used. Also, avoid using a pipe unit operation for every possible section of pipe in the model, as doing so is usually redundant and time consuming and will slow down the simulation.
Note that the pipe does not model rigorous transient phenomena such a shock waves.
Pipe in Dynamics
The pipe is configured the same way as in steady state (press F1 in Petro-SIM for more help). Dynamics mode only require the elevation of the entire pipe section to be provided, since static head contributions between it and other equipment may be relevant.
To add a simple pipe in dynamics mode, connect it up in the flowsheet. Attach a duty stream and on the Rating, Heat Transfer page, specify the heat loss to zero. On the Rating, Section page, add one segment and sets it length and diameter. And that is it!
The pipe unit operation will provide the same results as it does in steady state.