Chinese Journal of Engineering / 2014 / Article / Tab 2

Research Article

Cathodic Protection of Pipeline Using Distributed Control System

Table 2

Range of current required for protection of 10 miles 0f 36′′ diameter pipe [1].

Effective coating resistance in ohms for one average square footCurrent required in amperes

Bare Pipe@500
10,00014.91
25,0005.964
50,0001.491
5,00,0000.1491
10,00,0000.0298
Perfect coating0.000058

Bare pipe assumed to require a minimum of 1 mA/ft2.