Autocad Plant 3d Iso Symbol Skey Jun 2026

You can set a default fallback SKEY in the IsoConfig.xml . If the part has an SKEY that doesn't exist, it will use, for example, UNKNOWN_VALVE .

| SKEY | Component Type | Typical 2D Symbol | | :--- | :--- | :--- | | | Gate Valve | Diamonds | | BV | Ball Valve | Solid Circle | | CV | Check Valve (Swing) | Circle with a line or hinge | | GL | Globe Valve | Butterfly shape | | DV | Diaphragm Valve | Double line | | FL | Flange (WN/SO) | Two short vertical ticks | | EL | Elbow 90° | Quarter circle arc | | TR | Tee (Reducing/Equal) | T-shaped branch | | RC | Reducer (Concentric) | Converging lines | | RE | Reducer (Eccentric) | Eccentric converging lines | | SG | Strainer (Y-type) | Diagonal line with circle | | TG | Thermometer | Circle with T | | PG | Pressure Gauge | Circle with P |

Here is an example of a simple skey file for a valve symbol:

Fix: Go to Project Properties → Isometric Settings → Advanced → Uncheck Use spec-driven SKEY for component . This forces the ISO engine to respect manual overrides.

At the heart of Plant 3D’s automated isometric generation is a powerful, two-character coding system known as the . Understanding how SKEYs bridge the gap between your 3D plant model and your 2D isometric drawings is essential for any CAD administrator or piping designer. What is an SKEY in AutoCAD Plant 3D? autocad plant 3d iso symbol skey

This drawing file acts as the template library for all your isometric symbols. It contains the actual 2D AutoCAD blocks (complete with attributes and stretch actions) that will be drawn on the final PDF or DWG. Common AutoCAD Plant 3D SKEY Reference List

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It matches VTFL to the AutoCAD block name IsoValveBallFlanged .

: You can use ?? in some configuration files to create broad mappings for component types. You can set a default fallback SKEY in the IsoConfig

: The Connection Points ( CP1 , CP2 ) inside the custom block in IsoSymbolStyles.dwg are missing, misnamed, or positioned incorrectly. The engine does not know how to route the pipe through the symbol.

By mastering the relationship between AutoCAD Plant 3D models, SKEY strings, and the isometric symbol libraries, you can fully automate your deliverable pipeline—saving hundreds of hours of manual drafting cleanup.

Open using a text editor (like Notepad++). Locate the section.

Do you have a specific SKEY issue? Common problems involve Jacketed valves, Reducers (CON/ECC), or Break lines. Always check the ISO generation log (XML file) before editing the DWG. This forces the ISO engine to respect manual overrides

When generating an isometric, the IsoSkeyAcadBlockMap.xml file mapping determines how the SKEY links to a 2D symbol block. Without a properly defined SKEY, the isometric engine cannot draw the component correctly, often resulting in a generic symbol or an error. Common SKEY Examples Elbow, Butt-welded ELSW: Elbow, Socket-welded FLFL: Flange, Flanged VALF: Valve, Flanged RETC: Reducer, Concentric Customizing SKEYs in AutoCAD Plant 3D

If you need a unique symbol that does not exist in the standard library, you can create your own by modifying the project configuration. Step 1: Open the Source Symbol Drawing Navigate to your project directory. Go to Isometrics and open your specific style folder.

Before routing hundreds of feet of custom pipe, place a single component in a blank model and run a Quick Iso to instantly verify the graphics and data harvesting.