Coils 1
Coils 1 : The fluid to be heated is passed through one or more coils which may be typically arranged as a single pass coil, spit pass coil, or spiral coil. The coil may also be referred to as a tube bundle. The single pass coil is normally a serpentine pattern with only one flow path. This coil may also be arranged to provide two or more parallel flow paths for reduced pressure drop, but it is still referred to as a single pass coil. The split pass coil may be designed for two pressure ratings, allowing for a choke to be located between the two coil sections. Split pass coils are used when it is necessary to use two heating stages to minimize hydrate formation within the coil. The spiral coil is generally used on smaller heaters and is normally a single pass coil. Multiple coils may be used if more than one well stream is processed in the same heater shell. (Spec12K)
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