Process Design Engineering Package Continued.....
4.0 PROCESS FLOW DIAGRAMS (PFD):
Process Flow Diagrams shall include the following information:
a) Flow scheme depicting all major equipment and their sequence of connectivity showing all process streams
(including start-up lines) and also indicating major utility lines (where they influence process configuration).
b) Equipment number and equipment name shall appear for all major equipment.
c) Main control loops and instrumentation to the extent necessary to understand the process and utility system regulation philosophy.
Where a PFD is inadequate in explaining the complete control and interlock philosophy, Process Control Diagrams (PCL)
shall be additionally generated.
d) Diagrammatic outline of towers, vessels and reactors, indicating operating and temperature at key locations and including
number of trays or packed sections, location of feeds and product withdrawals and key internals.
e) Functional depiction of heat exchangers indicating operating duties for the depicted case and differentiating them by type,
such as air-cooled, shell-and-tube, double pipe, multi-tube, kettle etc.
f) Functional depiction of type of pumps and compressors, indicating normal flows and differentiating them by type such as
centrifugal or reciprocating, electric motor or steam turbine driven, etc.
g) All major process streams shall be numbered, the enthalpy and material balance information issued with PFD shall have complete
thermo-physical and transport property data for all numbered process streams, as indicated below.
h) Preliminary utility summary showing utility consumption and production of all equipment will be issued with first Issue of PFD.
i) All incoming and outgoing streams shall be flagged showing battery limit pressures and temperatures and indicating their source /
destination.
5.0 MATERIAL FLOW DIAGRAM:
Material flow diagram shall depict materials of construction and mechanical design pressure and temperatures of all facilities in the unit.
6.0 OVERALL UNIT MASS BALANCE:
LICENSOR shall provide unit mass balance for all feed streams and all product streams at both start-of-run and end-of-run conditions.
7.0 ENTHALPY & MATERIAL BALANCE:
Enthalpy and Material balance shall be provided with each revision of the PFD and will include, as a minimum, the following information:
a) Stream numbers corresponding to PFD.
b) Stream name.
c) Stream phase: Vapour or liquid or 2-phase.
d) Stream composition.
e) Total mass flow.
f) Operating temperature and pressure.
g) Stream enthalpy.
h) Operating density.
i) Density for liquid streams, Molecular weight for Vapour streams.
j) Kinematic viscosity at operating temperature.
k) Thermal conductivity at operating temperature. Critical temperature and critical pressure for Reboiled streams.