The engine extracts the corresponding 2D AutoCAD block, scales it according to the pipeline size, and places it on the isometric sheet with the correct orientation. Common Default SKEYs Reference List VAFB : Ball Valve, Flanged VAGL : Globe Valve, Flanged VAGA : Gate Valve, Flanged VACK : Check Valve, Flanged VABW : Gate Valve, Butt Welded ELBW : 90-Degree Elbow, Butt Welded ELSW : 90-Degree Elbow, Socket Welded TEBW : Straight Tee, Butt Welded REBW : Concentric Reducer, Butt Welded Flanges and Fasteners FLWN : Welding Neck Flange FLSO : Slip-On Flange GASK : Gasket STUD : Bolt/Stud Set How to Customize and Assign SKEYs
What (e.g., control valve, instrument, specialty fitting) are you working on?
: 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.
: Select the component in the 3D model, open the properties palette, scroll down to the "Isometric" section, and verify that both the Iso Type and Iso SKEY are filled out correctly. Component Disconnects / Broken Iso Lines autocad plant 3d iso symbol skey
Next, you must tell the program to link your new block to a specific SKEY.
To avoid manually fixing SKEYs in the 3D model every time, update them in your project specifications: Open the . Open your specific project .pspx catalog file. Select the component and look at the Part Properties .
Open the file located in your project directory: \Project Name\Isometrics\IsoSymbolStyles.dwg . The engine extracts the corresponding 2D AutoCAD block,
: The block library that contains the actual geometry for the isometric symbols. Common Default SKEYs Component Type SKEY Examples Block Name (Default) Operator_Hand1 Operator_Lever How to Create a Custom Iso Symbol How to configure new isometric symbol 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.
[3D Model Component] ↓ (Reads Catalog/Spec Data) [Iso Symbol Style & SKEY] ↓ (References Iso Symbol Map) [2D AutoCAD Block] ↓ (Generates PDF/DWG) [Final Isometric Drawing] The engine does not know how to route
In AutoCAD Plant 3D, production-ready isometric drawings rely entirely on two critical elements: and SKEYs (Symbol Keys) . If your isometric drawings show missing components, incorrect graphics, or generic blocks, the root cause is usually a mismatched or misconfigured SKEY.
: Before modifying IsoSkeyMap.xml or IsoSymbolStyles.dwg , always create a secure backup copy. A single typo in an XML tag can cause the isometric engine to crash for the entire project team.