Corrosion Protection - Offshore Structures: Design, Construction and Maintenance - page 430

TABLE 6.16 Steps in CP Design — cont ' d

Input/Output
Data

Item Calculation and Equations

Conductors: − 3.0 to − 30.0 1.0

Conductors: − 30.0 plus 0.6

Risers: HAT to − 3.0 0.6

Risers: − 3.0 to 30.0 0.6

Risers: − 30.0 plus

Current demand jacket

I c (initial)

A c (m 2 )

Zone f c (initial) i c (initial)

(A/m 2 )

I c (A)

Jacket: HAT to − 3.0 67.3563 0.350 0.035 0.825

Jacket: − 3.0 to − 30.0 692.6240 1.0 0.035 24.242

Jacket: − 30.0 plus 0.00 1.0 0.035 0.00

I c (average)

Jacket: HAT to − 3.0 67.3563 0.475 0.035 1.120

Jacket: − 3.0 to − 30.0 692.6240 1.0 0.035 24.242

Jacket: − 30.0 plus 0.00 1.0 0.035 0.000

I c (final)

Jacket: HAT to − 3.0 67.3563 0.60 0.035 1.414

Jacket: − 3.0 to − 30.0 692.6240 1.0 0.035 24.242

Jacket: − 30.0 plus 0.00 1.0 0.035 0.000

Current demand conductors

I c (initial)

Conductors: HAT to − 3.0 30.099 1 0.035 1.053

Conductors: − 3.0 to − 30.0 151.736 1 0.035 5.311

Conductors: − 30.0 plus 0.00 1 0.035 0.000

I c (average)
Conductors: HAT to − 3.0 30.099 1 0.035 1.053

Conductors: − 3.0 to − 30.0 151.736 1 0.035 5.311

Conductors : − 30.0 plus 0.00 1 0.035 0.000