The first step is to build the batch plant, basically the materials unloading, storage, and mixing facility. The batch plant consists of a number of storage silos and some smaller loading bins. Starting with the silos - the body was concrete and about 26' in diameter. I was able to replicate this with 3" schedule 40 PVC pipe. In the past I've had a few issues, primarily due to the weight of your traditional PVC piping. For this model I am using a product called Corex - it is PVC on the outside and inside skins of the pipe, but cellular PVC on the inside core. This makes for a lighter, and probably more dimensionally stable pipe. This isn't something you will likely find at a Home Depot, but a good plumbing supply house should carry it.
|PVC Pipes Cut to Size - Smaller diameter pipes are thin-walled central vacuum pipes available at an electrical supply house|
|20 degree segments with a 30 degree pitch|
|Segments glued up|