Cathodic Protection for Subsea Structure Piling
Cathodic Protection for Subsea Structure Piling
(OP)
Hello everyone,
My question is this:
For a subsea open end pile, is there a recommended limit to the pile depth which contributes to the structure's buried surface area (and therefore its current drain)?
The DNV-RP-B401 addresses pile contribution to the structure's submerged surface area in the following:
"For open pile ends, the top internal surface shall be included for a distance of 5 times the diameter and shall be regarded as seawater exposed."
There is no similar prescription for evaluating the surface of the buried end up to a specific depth.
Surely, the buried pile surface area is not evaluated across its entire depth, correct? I would assume that after a depth of at most 20 or 30m, the corrosive effects of salt water would be inhibited.
Thank you.
My question is this:
For a subsea open end pile, is there a recommended limit to the pile depth which contributes to the structure's buried surface area (and therefore its current drain)?
The DNV-RP-B401 addresses pile contribution to the structure's submerged surface area in the following:
"For open pile ends, the top internal surface shall be included for a distance of 5 times the diameter and shall be regarded as seawater exposed."
There is no similar prescription for evaluating the surface of the buried end up to a specific depth.
Surely, the buried pile surface area is not evaluated across its entire depth, correct? I would assume that after a depth of at most 20 or 30m, the corrosive effects of salt water would be inhibited.
Thank you.





RE: Cathodic Protection for Subsea Structure Piling
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
RE: Cathodic Protection for Subsea Structure Piling
That makes sense. In order to prevent any corrosion on the structure, the driving potential between the pile and sediment would have to be negated regardless of whether iron is actually oxidizing at the buried end of the pile. This is my understanding of your response at least.
RE: Cathodic Protection for Subsea Structure Piling
S
Corrosion & Rust Prevention Control
RE: Cathodic Protection for Subsea Structure Piling
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
RE: Cathodic Protection for Subsea Structure Piling
Eng Tips Rocks
thanks,
kk
http://cubuilt.com