RP E On-Bottom Stability Design of Submarine Pipelines. General. This Recommended Practice replaces the following Veritec publications,. None. Hello you guys, I would like to know what are the differences between the two recommanded practices of DNV: DNV RP E and DNV RP. Revision: Edition, October ; Published Date: October ; Status: Superseded By: Superseded By: DNVGL-RP-E; Document Language: English.
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New DNV GL RP on offshore fibre ropes
For the remaining unstable 5km region, the stability analysis was re-assessed using the generalised lateral stability and absolute lateral stability methods outlined in DNV-RP-F For the 3km region, env was found that the as-laid water depth was greater than that used in the design. Based on the concrete coating thickness recorded in the final survey report, two regions one 3km and another 5km region of the pipeline were found to be unstable.
Download Now Defense manufacturing is all about project manufacturing and project accounting. To further reduce conservatism, an OrcaFlex analysis was performed by modelling a 1km dnf of the dnnv and applying the hundred year significant wave e05 ten year current using an irregular wave analysis JONSWAP wave spectrumwhich simulated a three hour storm.
It emphasises the following key e3005. The strength and endurance of synthetic rope, which is fundamentally different to the strength and endurance of steel-wire rope on the basis that mechanisms are different. Signup to our newsletter Sign up to our newsletter to keep up-to-date with free webinars and white papers, latest news and exclusive offers. Area of interest Engineering Training. The design calculations showed that the worst case environmental loading was the hundred year wave and then year current combination.
Join your peers on the Internet’s largest technical engineering professional community. This showed the pipeline was unstable using these extreme storm conditions. Resources Digital Transformation may be defined dng a number of different ways by analysts or enterprise software vendors. Red Flag This Post Please let us know here why this post is inappropriate. Hello you guys, I would like to know what are the differences between the two recommanded practices of DNV: Can’t find what you are looking for?
Students Click Here Join Us! Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework. Offshore Fibre Rope should be analysed on the basis of amount tp load-bearing material in the cross section, and the characteristics of the material used. The as-built concrete coating thickness stated in the final survey report differed from the thickness given in the coating specification, therefore a re-assessment of stability was required.
Are you an Engineering professional? The RP is intended to serve owners, system integrators, rope manufacturers, manufacturers of load-bearing synthetic yarns and coating, and termination hardware products. The offshore oil and gas industry uses synthetic fibre s305 across various mission-critical activities where performance and reliability are key concerns. Click Here to join Eng-Tips and talk with other members!
DNVGL-RP-E offshore fibre ropes guidance | Energy Global
Therefore, recommendations were made to investigate the condition of the unstable pipeline region. The integrated system behaviour is also very important in offshore mooring. Please sign in or become a member for free. Posting Guidelines Promoting, selling, recruiting, coursework and thesis posting is forbidden. That’s right, but some data in the version are not clear and I think I will need to go back to the version: Read the article online at: By further attempting to reduce conservatism through DNV-RP-F and an OrcaFlex model, it was found that the second region remained unstable under the three hour storm conditions.
This showed the region was still unstable, despite the reduction in conservatism between the design codes. The benefits By verifying pipeline stability based on the as-built concrete coating thickness against the original stability design code, DNV-RP-E, it was possible to conservatively determine that one of the regions was stable. These include mooring systems, lifting slings, and deepwater deployment and recovery systems for subsea infrastructure.
However, a regular wave analysis using Stokes 5th wave theory showed the pipeline as stable for waves smaller than the hundred year significant wave height combined with the ten year maximum current.
The on-bottom stability analysis was performed according to the simplified stability analysis method outlined in DNV-FP-E ‘On-Bottom Stability Design of Submarine Pipelines’, the same methodology used in the original design.
The tension versus stretch behaviour of synthetic rope, which is fundamentally different to that of steel wire rope. Download Now White Paper: Digital Transformation may be defined in a number of different ways by analysts or enterprise software vendors.
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By verifying pipeline stability ee305 on the as-built concrete coating thickness against the original stability design code, DNV-RP-E, it was possible to conservatively determine that one of the regions was stable.