Crossing 3
0,051/0,38=0,13 pcs
Where:
– protective current required
– current intensity in anode – pipeline circuit
Crossing 2
0,015/0,38=0,04 pcs
Either:
In kg per design period
Crossing 3
=30*3.95*0.027/0.5=6,39 kg 6,39/14,5кг=0,44 pc; choose 2 pcs
- 30 years of design life
- electrochemical equivalent of anode material 3,95 kg/А*year
- protective current required
- use efficiency
Crossing 2
==30*3.95*0.015/0.5=3,56 kg 3,56/14,5кг=0,25 pcs; choose 2 pcs
Crossing 1
=30*3.95*0.068/0.5=16kg 16/14,5кг=1,1pcs; choose 4 pcs in accordance with VSN 009-88
6,3 m gasline section
=30*3.95*0.005/0.5=1,19kg 1,19/14,5кг=0,08 pcs in this case it
is adequate to protect from the current cathodic protection
95 m gasline section
=30*3.95*0.068/0.5=16 kg 16/14,5кг=1,1pcs; choose 4 pcs
