Minecraft – get the AE2 network to see what’s in the logistic pipes network

If you attach a logistic chassis with an extractor module (either mark 1 or 2) to the side of the furnace it will extract any excess products from the furnace and send them to the default route, do not worry about the extractor module taking items that the crafting pipe was waiting for as it has a lower priority so will not take the items unless no other pipe wants it.

Routers are, in my experience, your best bet here, you can configure one router to pull the scrap out (set the router to extract from a side), and one router to insert the required items (insert into top).

This way you need one Export/Level emitter per type, up to a maximum of 4 per router (technically you can add more per router, but it's messy). If you want more than 4 types of items you can add another router set to insert at top without problems.

This setup would also be easier to expand as you would just need to run IC2 power further and add the block next to the existing system. (http://imgur.com/a/wdnDY)