... plants is 1 2 ", 3 4 ", 1", 1 1 2 ", 2", 3", 4", 6", 8", 10", 12", and 14" and higher. When a pipe has an outer diameter of 14" or ... line-ups, standard operating procedures, safety rules and regulations, and sampling techniques. Process tanks and storage systems are equipped with the latest in modern process control. Process variables ... actual inside and outside diameters (Figure 3.9). For example, a 3 1 2 " pipe has an outside diameter of 4" and an in- side diameter somewhere between 3 1 2 " and 4". Most...