## Tutorial 3 - Piping spec part

Start with the symbol project created in the second tutorial.

1.  Change all parameter mappings from occurrence (`OA`) to standard mappings. To do this, remove the `OA:` prefix from all parameter mappings, except for `InsulationThickness`.

2.  Click the **SP3D Export** button (<img src="./media/image29.png" width="16" height="16">) on the toolbar.

3.  Select the **Piping** branch. This produces a piping DLL.

4.  Choose your target directory on the second tab, **Build**, and adjust the database settings on the third tab, **Bulkload**.

5.  Click **Start**. The project files are written to the target directory.

<img src="./media/image141.png" width="140" height="136">

6.  The bulkload sheets for these spec parts must be created manually. Examples of such bulkload sheets can be found in the **3D SymbolDesigner** sample folder.

    Operator symbols can be created in the same way. For these symbols, `(0, 0, 0)` is the construction base. Do not include any nozzles or ports. The export target is also **Piping**.

    To place operators in spec parts, add the operator placeholder to the base parts. In addition, add `OA:IJSecOperOrient::Rotation` to the attributes of this symbol. See the `CAXGateValve` and `CAXHandwheel` projects in the sample folder.

<img src="./media/image142.png" width="746" height="372">

7.  Bulkload the part as described in Tutorial 2, item 54 and the steps that follow.