Find the most up-to-date version of DNV-RP-B at Engineering Find the most up-to-date version of DNVGL – DNV-RP-B at Engineering DNV-RP-B CATHODIC PROTECTION DESIGN JANUARY Since issued in print (January ), this booklet has been amended, latest in October .
|Published (Last):||16 August 2017|
|PDF File Size:||3.22 Mb|
|ePub File Size:||19.41 Mb|
|Price:||Free* [*Free Regsitration Required]|
DNV-RP-B CATHODIC PROTECTION SYSTEM – Off-shore structure engineering – Eng-Tips
It appears that you need to know a and t to do this problem. Kind regards, Sadik Hussain RE: I am hoping someone could elaborate the following part, ‘When the design life of the CP system exceeds the actual calculated life of the coating system according to 6. Posting Guidelines Promoting, selling, recruiting, coursework and thesis posting is gp.
Red Flag This Post Please let us know here why this post is inappropriate. Are you an Engineering professional? Such issues rnv the result of project complexity, size, uniqueness and regulation, as well as the need for virtual team collaboration.
Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.
The Architecture, Engineering and Construction AEC industry is constantly looking for process improvements to better manage potential project delays and costs. But over the last few years Coatings have been found useful in contributing positively to the CP cause which led to a considerable reduction in the usage of anodes. I think the Cathodic Protection Systems were designed previously without considering the influence of coating on the corrosion behavior. You should size the anodes based on an assumed amount of coating damage and a anode lifetime.
Kind regards, Sadik B41. Another factor is periodic cleaning of marine growth in this zone. You probably should also know what b is.
Join your peers on the Internet’s largest technical engineering professional community. What has been done looks like two calculations, picking the biggest number.
But then how do we calculate t if we don’t know rnv in eq 3. The Eng-Tips staff will check this out and take appropriate action. It’s easy to join and it’s free. So the point is basically that you need two sets of design lifeone for CP sytem and the other for the coating you apply to the structure.
But sometimes Owners tend to specify different durations say 5 years for the anodes and 3 for the coating. When the design life of the CP system exceeds the actual calculated life of the coating system according to 6. Below is the statement: Thank you for helping keep Eng-Tips Forums free from inappropriate posts. Register now while it’s still free! Do let me know if you need any clarifications.
Promoting, selling, recruiting, coursework and thesis posting is forbidden. By joining you are opting in to receive e-mail. Students Click Here Join Us! Close this window and log in. So this lead to increased demand on the number of anodes and the design current etc.
What’s the point in having anodes djv longer than the coating?
As a simple engineering approach, fc can be expressed as: Download Now The Architecture, Engineering and Construction AEC industry is constantly looking for process improvements to better manage potential project delays and costs. That’s what you want to do? Ideally you would like both durations to be similar since it is beneficial to replace them together. Few production environments have the luxury of ordering new equipment to replace existing machines on their shop floor.
Biginch, Yes it would be preferable if you size the anodes based on the coating life. So you consider the influence of the coating for dnb first 3 years and for the remainder, calculate without it.
Click Here to join Eng-Tips and talk with other members! The effect of marine growth is highest in the upper 30 meters where wave forces may further contribute to coating degradation. I’d say that if you don’t know a, b and t, you should not be trying to use equation 3. Resources Few production environments have the luxury of ordering new equipment to replace existing machines on their shop floor.