> For the complete documentation index, see [llms.txt](https://help.auxalia.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.auxalia.com/plant-tools/plantspecdriven/how-to-use/use-cases/editing-line-segment-properties-pid/inserting-symbols-pid/understanding-assigning-pipe-spec-data-pid/assign-pipe-spec-data.md).

# Assign Pipe Spec Data

This chapter describes how you can assign Pipe Spec Data to a single symbol.

Let's use the example from the previous chapter where we removed the assigned Pipe Spec Data.

![](/files/S5op7DV259sU50KiwBre)

We use **Assign Catalog Data** from the context menu again.

![](/files/pAFlmTKHH4YfI3wQkiMy)

The **Part Selection** dialog opens and we see the available parts. If there is just one part available, you simply click on **Assign Catalog Data**. If you have multiple choices, you select the part and then click on the assign button.

![](/files/eOx7EgvTPOpiRy1ujtWS)

Next AutoPipe may show a dialog in case multiple flanges are available. Here you also select the flanges for each AttachmentPoint/Port and click on **Assign.** If you click on **Cancel**, then no flanges symbols will be inserted.

The handling of flanges and fasteners is explained under [Understanding AutoPipe (P\&ID)](/plant-tools/plantspecdriven/how-to-use/use-cases/editing-line-segment-properties-pid/inserting-symbols-pid/understanding-autopipe-pid.md) and [Understanding Fasteners (P\&ID)](/plant-tools/plantspecdriven/how-to-use/use-cases/editing-line-segment-properties-pid/inserting-symbols-pid/understanding-fasteners-pid.md).

![](/files/gVD1NCxTZqZz953cnvxm)

Now we see that Pipe Spec Data have been assigned to the valve and the flange symbols, its Pipe Spec Data, and the fasteners appear again.

![](/files/orzclHbhGgWpYOvvY1m5)-