Explain how each of the following statements might affect the layout of process equipment:

• A specific pump requires a large NPSH.
• The flow of liquid from an overhead condenser to the reflux drum is gravity driven.
• Pumps and control valves should be located for easy access and maintenance.
• Shell-and-tube exchanges may require periodic cleaning and tube bundle replacement.
• Pipes located at ground level present a tripping hazard.
• The prevailing wind is nearly always from the west.