Hi
I just wonder if it is necessary to design drip leg for water residues before air preparation block (filter/regulator w manual drain + lubricator).
Compressor is equipped with a refigerant air dryer. All piplines are in heated rooms.
The refrigerated dryer would lower the dew point down to ~40 F (likely highest) and since you are in a heated room, the temperature should not go below that - so no condensation should form inside the piping.
The cost of having to install a drip leg later on if if the equipment malfunctions or performance degrades is alot greater than installing it initially.