state the fluid material that is conveyed by the piping.2) is an un-scaled drawing or schematic which describes the process of transferring fluid inside the piping. Process Flow Diagrams (PFD)Ī PFD or Process Flow Diagram (Fig. Type of pipe supports required in the piping and pipeline systems.Correct positioning of the piping assembly on the pipe rack.Spacing or centreline distance between one pipe to the other line.
