What is the difference between PID and PG?

PG is generally a field-installed pressure gauge.

PI is a gauge, for pressure indication.

PT instrumentation words for pressure transfer.

Difference:

PG is a field-installed pressure gauge, which can only be seen on site.

PI is the pressure display data, which can be remotely transmitted to the main control room for viewing.

PID Process Flow Diagram:

Process flow diagram is a schematic diagram used to illustrate a reaction process or chemical process. In analyzing the movement of products and people, the process flow diagram provides a valuable illustration of the step-by-step sequence.

Process flow diagrams utilize graphic symbols to express the structure of the original parts of the process and the operation of the process in a very clear and concise manner.

Expanded Information

PID Process Flow Diagram View:

The first step in drawing a standard process flow diagram (which includes chemical parts diagrams as well as chemical equipment diagrams) is to select the view, which is intended to reflect the structure, size, and mounting dimensions of the actual object, and can be read very clearly. The first step is to select a view.

Most chemical machinery and equipment are characterized by a rotary body, so when selecting the main view, the plane where the rotary body spindle is located will be the default main view.

After selecting the main view, the second step is to select a basic view, which is mainly used as a secondary view. At the same time, there are two default provisions:

①when the equipment for the vertical equipment, select the top view as the basic view of the equipment;

②when the equipment for the horizontal equipment, the left view is usually used as the basic view of the equipment, when there are special circumstances, you can also be adjusted.

To determine the main view of the equipment and a basic view, and then according to the complexity of the equipment and the actual drawing needs, parts and components and too complex parts of the drawing is mainly through the auxiliary view to complete.

Reference:

Baidu Encyclopedia--Process Flow Chart