The first step in buying new or used process equipment is to truly understand what it must do. Usually this requires that a process line—or the specific piece of equipment—be designed, a classic engineering task. What this means is that all of the pieces of equipment in a line must be identified, including those pieces, such as conveyors, that connect various operations. Sometimes a line is similar to others in the company, but often the line is a new arrangement intended to make an unfamiliar p…