> 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/drawing-a-line-segment-pid.md).

# Drawing a Line Segment (P\&ID)

This chapter describes what happens when drawing a Pipe Line Segment in a P\&ID Drawing.

If you route a Pipe Line Segment you may see this dialog. This dialog appears if the line connects to an equipment and the equipment has a nozzle with a flanges nozzle.

In this case, you click just on **Assign**.

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-7544c3b8ff533c1834e9ab347b8ea39562158737%2FUse-Cases-0004.png?alt=media)

Or you can first select **Do not show this message again** and then click on **Assign**. In this case the dialog will not appear anymore.

If you want to get the dialog again, you can enable it under [Dialog Preferences](/plant-tools/plantspecdriven/settings.md).

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-6119dffee517f65bc2e1b39f0440d34de3cfe424%2FUse-Cases-0005.png?alt=media)

In this example you see the differences between a flanged (pump) and an anonymous (tank) nozzle.

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-256ae48f972503581713abb3caee303826a6eacb%2FUse-Cases-0001.png?alt=media)

In Project Setup you can see, that the pump will get the **ISO Single Lined Nozzle**.

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-27b954d455e28c296606b60fdbd3affeed98de9a%2FUse-Cases-0002.png?alt=media)

The Nozzle itself has an EndType FL which tells PlantSpecDriven, that this nozzle is flanged and will get a flanges nozzle (see [Page 13 - AutoPipe - Flanges](/plant-tools/plantspecdriven/how-to-use/configuration/the-wizard/spec-driven-lines-symbols/page-13-autopipe-flanges.md)).

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-0de8c76b249b84d73c5596505d566c2f2a77b27a%2FUse-Cases-0009.png?alt=media)

In this example the tank just uses the **ISO Assumed Nozzle**.

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-03aa79fcae433ca056523f3d7e3cb0f3f519e085%2FUse-Cases-0003.png?alt=media)

If you select the nozzle...

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-2f1d9043b6cea5a0c6d9837cbcee20a6ebbf9830%2FUse-Cases-0006.png?alt=media)

...and you substitute the nozzle with the **ISO Single Lined Nozzle**...

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-d9de06f2a14735acbd3d53591cee8ade2e90aec0%2FUse-Cases-0007.png?alt=media)

...you will get the **Default Flange** too.

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-6c16b3b47a867c0a51eff080a9562063b57c0fe8%2FUse-Cases-0008.png?alt=media)