Grade-mounted horizontal inline

Plot plans are often referred to by their process (e.g., an ammonia plant or hydrotreater unit) rather than by the type of configuration of the equipment layout. In terms of equipment arrangement, process unit plot plans can basi Iy be divided into two configurations the grade-mounted horizontal inline arrangement seen in most refinery facilities, and the structure-mounted vertical arrangement found in many chemical plants. 

EXHIBIT 3-7 Grade-Mounted Horizontal Inline Arrangement... 

Figure 1.9 Different Types of Plant Layout (a) Grade-Mounted Horizontal Inline Arrangement, and (b) Structure-Mounted Vertical Arrangement (Source Process Plant Layout and Piping Design, by E. Bausbacher and R. Hunt, 1994, reprinted by permission of Pearson Education, Inc., Upper Saddle River, NJ)...

Horizontal shell and tube exchangers may be located at grade or elevated in steel or concrete structures when process requirements or space availability dictate. Support of horizontal exchangers, as shown in Exhibit 6-l6, is by saddles attached to concrete piers for grade-mounted installations and by saddles attached to steel frames in elevated installatioiK. Wheh possible, supports should be inline for common foundation design. 

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