I would like to ask about the meaning of some markings on the drawing
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Looking at a process diagram, the pipes are labeled as FGC103d-80-3D1 and VA101d-50-3D1； The valves are of DN50-3D1-C3 and BD103b-50-3D1 types. What do these mean? What does each letter and digit represent? Could someone please help explain this? Thank you
Your question relates to the rules for pipeline numbering as well as those for valve numbering; for detailed information, please refer to the \"Chemical Process Design Manual\", the \"Uniform Regulations on the Content and Depth of Chemical Engineering Designs\", and the relevant standards for valve numbering. (The pipeline number codes are indicated on the first page of the drawing).
It should be medium code - pipeline number - diameter - pipe grade; for details, refer to the legend on the first page of the process flow diagram.
Reply to 2# zhuhonl: Thank you; the main issue is that I can’t figure out what 3D1 means. I don’t have blueprints; only the electronic version
The entire PID diagram set should include a legend that provides explanations, with annotations for the pipes included in it.
3D1 pipeline grade: here, 3 indicates a pressure rating of 3 MPa, D denotes the material (the specific type of material can only be found on the first page of the drawings; different design firms use different designations for it), and 1 represents the sequence number of pipelines with the same material and pressure rating.