flow diagrams, and piping and instrumentation diagrams. My name is Marina Miletic. this

is an example of a block flow diagram, a BFD for short, for an ethylene oxide production

process. Notice this is a very simple, bare-bones diagram of an entire process all on one page.

There is a lot of detail that is excluded from a diagram like this, but its usefulness

lies in its simplicity, because you can very quickly determine the most critical units

involved in the process. This is an example of a process flow diagram, a PFD for short,

again for the same ethylene oxide production process. Notice this diagram includes quite

a bit more detail, more equipment, and more streams compared to the block flow diagram.

This process flow diagram provides a great deal of information because it includes every

piece of equipment, and the whole process is shown again all on one page. This is an

example of a piping and instrumentation diagram, a P&ID for short, of that same ethylene oxide

process again. This is just one of the distillation columns in the ethylene oxide process and

no other equipment is shown. This is because there is an extraordinary level of detail

shown on a piping & instrumentation diagram, where every indicator, control loop, valve,

and piping diameter are shown, among other information. Taken together, you can see that

the block flow diagrams include the least amount of detail, and the piping and instrumentation

diagrams the most.