Concepts
Layers
Layers let you organize the diagram (pipes, instruments, annotations, frames). Each layer can be hidden, locked or renamed. Hidden layers are not exported.
Connections and routing
Connections are explicit-geometry polylines: they are created by snapping to any snapable point in the drawing (endpoints, midpoints, centers, intersections or points on the stroke), not only to fixed connection points. Symbol ports are shown as visual markers for guidance, but they are not required.
Joining two points routes the line automatically with square corners, and you can adjust the route manually with waypoints.
Tags
Each instrument uses a tag based on its function, e.g. PT-101 (pressure transmitter) or FV-201 (control valve). The editor suggests tags per discipline.
Title block
The title block stores drawing data: project name, members, drawing type, scale, revision and date. It is included in PDF exports.
P&ID validation
The validation panel reviews the diagram for common issues (untagged equipment, loose connections, incomplete loops) to help you produce consistent drawings.
Active area
The active discipline changes the catalog and symbol geometry: chemical, electrical, civil, mechanical and instrumentation.
Storage
Everything is saved locally in your browser. No data is sent to any server.