I have no recipe for any of the aboveground ducts except for the small ones. I can request them via logi network but I don't have a button to craft them
playing in 18.21 and version 1.2.7

Hi dacendoran,
I have open the mod now and all working property, so:

1. Do u have mods that modify game recipes? Like big overhauls?
2. Do u have mods that reorganize crafting-tabs?
3. Do u have unlocked the research of "Ducts" before try to craft anything?
4. Have u look in all crafting-tabs?

I think at least one of these questions have inside the answer that u looking for, try them in the order that I give u. I hope u will solve ur problem.

1. No big overhaul mods.
2. I'm using FNEI, I can see the recipe for the straight duct/ long straight duct but they have no ingredients.
3. Yup yup
4. Yeah, there's no recipe for the straight or long straight duct but they show in the logi network/FNEI.

Solved, was an misunderstanding with the auto-join option

i too dont have the recipes for the middle and long ducts. does this have to do with space exploration mods?

No u have: or to simple placying a row of small segments and see the mod that create it for ur, or disable in the option the auto-join algorithm and u have all recipes and u have to construct right segments when are needed.

auto join removes the 2 recipes completely