The mapping mechanism connects your 3D spec components to the 2D blocks drawn on the Iso sheet.
Plant 3D relies on two pieces of information to generate a symbol. First, the determines the general behavior of the component, such as whether it's a flange that always lies on a line or a blind flange that terminates it. The 'Iso Symbol SKEY' provides the final, specific instruction for which block to use.
The SKEY is not a technical nuisance; it is a . By mastering SKEYs, you gain absolute control over:
SKEYs can be managed at the catalog level (permanent), the spec level (per project), or directly inside the 3D model for quick fixes. Method A: Editing via the Spec Editor (Recommended) autocad plant 3d iso symbol skey
Define your connection points using , CP2 , and (if applicable) CP3 (for Tees/Branches) text markers or attributes. This tells IsoGen where the pipe connects.
This happens when the SKEY assigned in the spec/model does not exist in the IsoContentCnf.xml map, or the block is missing from IsoSymbolStyles.dwg . Double-check spelling and mapping strings.
In the world of AutoCAD Plant 3D, an Isometric drawing is not merely a visual representation; it is a database-driven extraction of the 3D model. At the heart of this extraction process lies a seemingly simple, yet profoundly critical, four-to-six-character code: the . The mapping mechanism connects your 3D spec components
AutoCAD Plant 3D is the industry standard for creating piping and instrumentation diagrams (P&IDs) and 3D piping models. One of its most powerful features is the automated generation of isometric drawings (Isos).
: Check valves typically rely on the order of CP1 (Inlet) and CP2 (Outlet). Ensure your 2D block geometry aligns with this logic, or change the component's orientation in the 3D model using the flip grips before running the Iso. Pro-Tips for Managing SKEYs in Large Projects
: 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. The 'Iso Symbol SKEY' provides the final, specific
Use code with caution.
An SKEY is a four-character alphanumeric code assigned to a piping component within the AutoCAD Plant 3D catalog and spec. It acts as a map tracker, telling the isometric engine exactly which 2D graphics block to use and how that component should behave when generating an isometric drawing. Structure of an SKEY An SKEY is broken down into two distinct parts:
It looks empty, but it contains thousands of anonymous blocks.