Pipe width doesn't scale with image

Good evening,
in a perspective application, i'm using Designer's built-in pipes into a coordinate container (mode "percent" and aspectRatio "2:1") to draw the schema of a plant.
Everything work as expected but when i resize the page, every svg element scale down proportionally but not the width of the pipes: it remain fixed to the value i set and the result is a mess.

I tried to manually bind every single pipe in the list with a percentage of the viewport but it's very annoying and does not respect the proportions with the other shapes.

Can anybody suggest some way to let the pipes width scale up and down with the rest of the image?

Thank you