The documentation of process control and associated field instrumentation is normally created by the engineering firm that designs and constructs the plant. Does management know how to retain engineering professionals? To do this, it is critical to demonstrate the physical sequence of equipment and systems, as well as how these systems connect. Instrument Hook Up Diagrams detail the accessory and tubing hookup for both process and pneumatic instruments based on the tag number.
Typical E xample and Description of Loop Diagrams - go to section 7.