When I placed a hammer and wrench in preparation for making some bronze pipes, I noticed the output was showing a dark steel fluid pipe, possibly because I do not have Ender IO installed, and "EnableAllMaterials" is false in my GregTech.cfg, so the dark steel plates are not defined.

Here's a screenshot:

I seem to also be able to make small and large dark steel fluid pipes with hammer and wrench in the appropriate positions (but no plates), though looking up recipes shows me no extruder recipes for them, and the huge dark steel fluid pipe recipe has "Errors - Tell Alkalus Ingot" (miscutils:AAA_Broken)