Requirements regarding the drawing of PFD diagrams?!
Thread Content
Who has requirements or standards for drawing process flow diagrams? Thank you!
Different organizations have different requirements, right? The PFDs we create are relatively general in nature: we draw the overall shape of the equipment, indicate its tag numbers, and show the material flow paths; once the zone numbers are assigned, that’s pretty much it. There’s no need to mark pipes, instruments, or other related elements. In another renovation project, we saw that their PFDs showed all the valves, instrument controls, etc., except for the pipe diameters
Describe in detail the process design parameters of each equipment pipeline and the main control circuits. Follow the relevant legend symbols when drawing.
I can’t find any relevant standards or specifications, so I have no idea what needs to be specified in detail, what needs to be drawn, and what the differences are from PID!
LZ, take a look at the chemical process design manual and then ask the seniors in the company; that way you’ll know what the company requires.
Take a look at the 1992 version of the Ministry of Chemical Industry’s design standards for process system construction drawings.
The PFD just needs to show the main material pipelines clearly. Besides what was mentioned above, I think there are a few things that need to be clarified as well, namely the design parameters at certain points; for example, at a specific point along the pipeline, the relevant parameters should be listed in a table, including the contents of various components and so on
Check the relevant design drawing standards
Could you upload a drawing for me to take a look? Thank you
For equipment (SKETCH), it is necessary to indicate the size (such as ID X T-T FOR VESSEL, number of trays, PUMP HEAD), control points (temperature, pressure, liquid level, etc.), the temperature and pressure of each STREAM, the reflux operation of the tower, and the amount of steam or cooling water used by each piece of equipment. The flow rate and physical properties of each STREAM also need to be specified; these are roughly the data that must be included, with nothing extra being allowed.
There is a national standard; check it out – it should be available on the forum.