I spent ten years as the instructor of Pressure Control for one the largest Natural gas companies in the United States. At least 200 days of each year, I taught in the field working with individuals responsible for all equipment used for pressure control and overpressure protection in more than 350 cities and towns. All classes were conducted in the field working on active stations. Students were taught to methodically research each station before any attempt at an inspection was made. Each student was first trained to comfortably control the station they were assigned “manually,” using block valves before conducting the inspection process