This model has been cut-down from a more complicated project model for a chemical plant.  Accordingly there may be some residual specific logic remaining that would need to be altered for any other project.  Whilst care has been taken in the model's preparation, no warranty, either expressly or implied, is given as to the model's accuracy or applicability to any project.  Accordingly, the authors take no responsibility for the use of the model or any losses resulting therefrom.