There are 3 types of Conductive Pipes: Wooden, Stone, and Gold. These pipes can transport energy from engines to machines. Conductive pipes are made from normal pipes by adding Redstone.
In addition, Mining Pipe is a pipe only by name, as it cannot transport anything; it is the pipe placed by the Mining Well.
Pipe placement is important. If you want to remove items from a furnace, for example, then a wooden pipe needs to be attached to the side of the furnace. A pipe connected to the top of a furnace places items into the top spot, and a pipe connected to the bottom of a furnace puts items into the bottom spot.
If you connect pipes in certain ways, there's no end to the machines you could make!