P&ID Knowledge Graph
● Process context layer for LLMs

Turn P&ID drawings into a process knowledge graph

Upload a piping and instrumentation diagram as a PDF. Get back what feeds what, which instrument measures where, and how every control loop is wired, ready for engineers and AI assistants.

Process flow Measurement Control loops Vector & scanned PDFs

1 Upload your drawing

PDF only, digital or scanned. Up to 200 MB.

Drop a PDF here, or click to browseP&IDs, PFDs, CAD exports, scans
PDF

★ Try a demo

No drawing handy? Load a sample, then press Convert.

Job

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Technical log


    

      

      

      

      

        

          
          
          
          
          
          
          
          
          
        

        

          

        

        
Click a node for details and to trace flow upstream or downstream. Scroll to zoom, drag to pan.

      

      
    

  


  
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How it works
Claude reads the drawings. Tested scripts do the rest, the same way every time.

  

    
①
Prepare pages
Each page is classified (vector or scanned), straightened, and cut into overlapping tiles sized to the smallest text.

    
②
Read every sheet
Claude reads the overview and each tile: equipment, pipes, valves, instruments, signals and off-page connectors.

    
③
Build the graph
Pipes are split between fittings, instruments are attached to what they measure, and control loops are assembled per ISA-5.1.

    
④
Check & export
A QA pass flags anything doubtful, then you download the graph, a summary, and a database.

  

  
What you get

  

    
MD
summary.mdReadable plant overview. The best context to give an LLM.

    
QA
qa_report.mdEverything to re-check, pointing at the drawing region.

    
JSON
graph.jsonThe complete graph for any tool to read.

    
DB
graph.duckdbSQL database with upstream and downstream queries.