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 Revision: Edition, October ; Published Date: October ; Status: Superseded By: Superseded By: DNVGL-RP-E; Document Language: English.
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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. 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 pipeline was unstable using these extreme storm conditions. 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.
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New DNV GL RP on offshore fibre ropes
The tension versus stretch behaviour of synthetic rope, which is fundamentally different rnv that of steel wire rope. The offshore oil and gas industry uses synthetic fibre ropes across various mission-critical activities where performance and reliability are key concerns.
The integrated system behaviour is also very important in offshore mooring. Stability was re-assessed using the revised water depth which showed the region to be stable.
Are you an Engineering professional? Promoting, s305, recruiting, coursework and thesis posting is forbidden. 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 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. Area of interest Engineering Training.
Download Now White Paper: 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 three hour storm.
Students Click Here Join Us! You should read the first sentence of the Introduction: Thank you for helping keep Eng-Tips Forums free from inappropriate posts. 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.
The RP is intended to serve owners, system integrators, rope manufacturers, manufacturers of load-bearing synthetic yarns and coating, and termination hardware products. Can’t find what you are looking for?
DNVGL-RP-E RP Design, testing and analysis of offshore fibre ropes – DNV GL
Posting Guidelines Promoting, selling, recruiting, coursework and thesis posting is forbidden. For the 3km region, it was found that the as-laid water depth was greater than that used in the design.
Resources Digital Transformation may be defined in a number of different ways by analysts or enterprise software vendors. Hello you guys, I would like to know what are the differences between the two recommanded practices of DNV: Read the article online at: Therefore, recommendations were made to investigate the condition of the unstable pipeline region.
It emphasises the following key aspects:. A major operator asked us to undertake a stability analysis of a 20″ trunkline to ensure the pipeline was stable. Digital Transformation may be defined in a number of different ways by analysts or enterprise software vendors. Close this window and log in. By joining you are opting in to receive e-mail. Red Flag This Post Please let us know here why this post is inappropriate.
differences between DNV RP E and DNV RP F – Off-shore structure engineering – Eng-Tips
These include mooring systems, lifting slings, and deepwater deployment and recovery systems for subsea infrastructure. For the remaining unstable rnv region, the stability analysis was re-assessed using the generalised lateral stability and absolute lateral stability methods outlined in E30 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 gp determine that one of the regions was stable.
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