Select curves of mesh in specific direction

Hey guys,
I would like to select the curves of the mesh of the different directions. Can someone help me?

mesh curves (16.3 KB)

mesh curves (21.9 KB)

Coool, thank you very much!

i understand that these have been coloured differently now, but how do you actually select these lines?

You could simply explode the data tree, either before or after creating piped surfaces.