DNV RP E305 PDF

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 Revision: Edition, October ; Published Date: October ; Status: Superseded By: Superseded By: DNVGL-RP-E; Document Language: English.

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Promoting, selling, recruiting, coursework and thesis posting is forbidden. Lifting lines are used for the installation of subsea infrastructure, where the offshore fibre rope performs as an integral part of a lifting appliance and where no function can be seen in isolation.

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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. It emphasises the following key s305 Here are the instructions how to enable JavaScript in your web browser.

To further reduce conservatism, an OrcaFlex analysis was performed by modelling a 1km section of the pipeline and applying the hundred year significant wave and ten year current using an irregular wave analysis JONSWAP wave spectrumwhich simulated a e035 hour storm.

Thank tp for helping keep Eng-Tips Forums free from inappropriate posts. The integrated system behaviour is also very important in offshore mooring. These include mooring systems, lifting slings, and deepwater deployment and recovery systems for subsea infrastructure. Offshore Fibre Rope should be analysed on the basis of amount of load-bearing material in the cross section, and the characteristics of the material used. By joining you are opting in to receive e-mail.

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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. Register now while it’s still free! 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.

DNVGL-RP-E offshore fibre ropes guidance | Energy Global

e35 This showed the region was still unstable, despite the reduction in conservatism between the design codes. Students Click Here Join Us! The offshore oil and gas industry uses synthetic fibre ropes across various mission-critical activities where performance and reliability are key concerns. The tension versus stretch behaviour of synthetic rope, which is fundamentally different to that of steel wire rope.

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.

Download Now White Paper: This showed the pipeline was unstable using these extreme storm s305.

You should read the first sentence of the Introduction: Defense manufacturing is all about project manufacturing and project accounting. This content is available to members only.

Read the article online at: The solution 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.

For the 3km region, it e05 found that the as-laid water depth was greater than that used in the design. Close this window and log in.

Hello you guys, I would like to know what are the differences between the two recommanded practices of DNV: A major operator asked us to undertake a stability analysis of a 20″ trunkline to ensure the pipeline was stable.

The design calculations showed that the worst case environmental loading was the hundred year wave and then year current combination. 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 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.

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DNVGL-RP-E RP Design, testing and analysis of offshore fibre ropes – DNV GL

The RP is intended to serve owners, system integrators, rope manufacturers, manufacturers of load-bearing synthetic yarns and coating, and termination hardware products.

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.

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. Please sign in or become a member for free.

New DNV GL RP on offshore fibre ropes

Join your peers on the Internet’s largest technical engineering professional community. That’s right, but some data in the version are not clear and I think I will need to go back to the version: Therefore, recommendations were made to investigate the condition of the unstable pipeline region. Are you an Engineering professional? The Eng-Tips staff will check this out and take appropriate action.

With a system perspective on mooring performance, DNVGL-RP-E provides new industry guidance for achieving cost reductions of overall mooring operations, by addressing the engineering, manufacture, and integration of offshore fibre ropes.