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首页> 外文会议>25th International Conference on Offshore Mechanics and Arctic Engineering 2006(OMAE2006) vol.4 >NEW DESIGN CODE FOR INTERFERENCE BETWEEN TRAWL GEAR AND PIPELINES DNV RP-F111
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NEW DESIGN CODE FOR INTERFERENCE BETWEEN TRAWL GEAR AND PIPELINES DNV RP-F111

机译：齿轮和管道之间干扰的新设计规范DNV RP-F111

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The offshore petroleum and the fishing industries are often operating in the same areas. Fishing, in particular bottom trawling, is of concern to pipeline integrity. Such trawling is mainly conducted with two types of trawl gear: otter or beam trawls. The otter trawl boards are steel, more or less rectangular boards which keep the trawl bag open by hydrodynamic drag forces. While the beam trawls use a 10-20 meters long beam to keep the trawl bag open. These trawl gears are dragged along the seabed and represent a potential hazard to pipelines.rnThis paper gives a brief description of types and dimensions of trawl gear. Further it deals with methods for calculating the pipeline response when interacting with bottom trawl gear and finally adresses acceptance criteria for pipeline design and assessment during operation. The calculation methods and acceptance criteria given in this paper are based on test results and research done during the last decades including results from the Kristin, Snohvit and Ormen Lange projects.rnThe above mentioned trawl data, analysis methodology and acceptance criteria are taken from the new DNV Recommended Practice, DNV RP-F111 (2006). This Recommended Practice is an update of the former design code DNV GL 13 (1997). The update was performed mainly due to new types of trawl gear, updated trawl gear data, various experience from application of GL 13 in projects and a general harmonizing process with the pipeline code, DNV OS-F101, and the Hotpipe project, ref Collberg et al. (2005).rnLarge sums are often spent in pipeline projects to protect against trawl gear interaction in terms of concrete coating, trenching or burial. On the other hand the costs of not providing a sufficient protection could be extremely high, with costs related to leakages, failures, stop in production and repair/replacement. This Recommended Practice provides a rational tool to optimize the costs related to trawl gear interference and still ensure that the integrity of the pipeline becomes acceptable.
机译：海洋石油和渔业通常在同一地区经营。捕鱼，特别是拖网捕鱼，关系到管道的完整性。这种拖网主要是用两种拖网设备进行的：水獭拖网或拖网拖网。水獭拖网板是钢制的，或多或少是矩形的板，它们通过水力拖曳力使拖网袋保持打开状态。拖网拖网使用10至20米长的拖网来保持拖网袋打开。这些拖网齿轮沿海床拖曳，对管道构成潜在危害。本文简要介绍了拖网齿轮的类型和尺寸。此外，本章还讨论了与底拖网齿轮相互作用时计算管道响应的方法，并最终满足了运行期间管道设计和评估的验收标准。本文给出的计算方法和验收标准是基于过去几十年的测试结果和研究得出的，包括Kristin，Snohvit和Ormen Lange项目的结果。rn上述拖网数据，分析方法和验收标准均来自新的DNV建议做法，DNV RP-F111（2006）。本推荐做法是对以前的设计代码DNV GL 13（1997）的更新。更新的执行主要归功于新型拖网齿轮，更新的拖网齿轮数据，GL 13在项目中的应用经验以及与管道代码DNV OS-F101和Hotpipe项目（参见Collberg等）的总体协调过程。等（2005）.rn通常在管道项目中花费大量资金，以防止拖网齿轮在混凝土涂层，挖沟或埋葬方面的相互作用。另一方面，不提供足够保护的成本可能非常高，与泄漏，故障，停产和维修/更换有关的成本。该推荐实践提供了一种合理的工具，可以优化与拖网齿轮干扰相关的成本，并仍然确保管道的完整性可以接受。

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