In Denmark it’s been challenging to find a suitable pipe, I found a galvanised pipe 32mm with 1.2mm wall. I mean, the docs say 1.3mm minimum, would that be ok? EDIT: also the accuracy is +0 / -0.4mm (overthinking?)
I’m unsure how the pipe surface would affect the overall performance since the galvanised pipes are a bit rough, with that being said, I’ve seen people painting their pipes which theoretically can be worse.
I have attached the datasheet if someone is neerding on the numbers