Piping Layout for a Furnace

This section details the piping layout of circular and box-type furnaces. Although such special features as snuffing steam are actually required for both heaters, they are explained for one application only. 

Exhibits 7-33 and 7 34 present simplified piping and instrumentation diagrams for a circular furnace. The furnace has 6-in inlet and outlet lines, with control valves, combination burners, and soot blowers in the 

In the conveaion section, three stationary soot blowers are fed by 1.5-in leads from the fire steam header located below them. This piping is kept close to the convection section wall to maximize the available work area for plant personnel. The four 3-in product inlet lines have manual control valves and local flow indicators that must be visible when personnel are operating the valves. They are located at the 

EXHIBIT 7-36 Furnace Elevation for the Upper Level of a Circular Furnace 

The lower level of the circular furnace is shown in Exhibits 7-37 through 7-39. In the radiant seaion, all piping should be grouped together for common sup- 

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