Cathodic Protection for subsea pipeline
Cathodic Protection for subsea pipeline
(OP)
Hi, I am new to the Pipeline Industry and interested in CP system topic. I wanted to know that, Usually one anode provide cp for certain length of the pipeline, after that we need to provide another anode for furthur protection, what if two anodes are provided 100 mm apart from each other, would that give same effect as previous arrangement or would that be uselful.i am inexperienced in this field and i appreciate you`lls experienced opinion.





RE: Cathodic Protection for subsea pipeline
https://exchange.dnv.com/Publishing/Codes/download...
Steve Jones
Corrosion Management Consultant
http://www.linkedin.com/pub/8/83b/b04
All answers are personal opinions only and are in no way connected with any employer.
RE: Cathodic Protection for subsea pipeline
The actual length of protection from one anode is determined by many factors, not just mass of the anode (though that is one input).
This is a very very simple explanation and there are lots of other issues about anode life, current density, coating insulation, number of defects etc which need to go into the calculation in the codes S Jones has mentioned above.
I assume you are talking about offshore lines here, but whilst the theory onshore is simialr, there the current is normally supplied by a transformer which has a much higher driving voltage and can cover much longer distances between inpuit points.
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Cathodic Protection for subsea pipeline