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首页> 外文会议>Biennial International Pipeline Conference(IPC 2004) vol.3; 20041004-08; Calgary(CA) >EVALUATION OF BELOW GROUND EMERGENCY SHUTDOWN VALVES IN SOUR GAS PIPELINES
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EVALUATION OF BELOW GROUND EMERGENCY SHUTDOWN VALVES IN SOUR GAS PIPELINES

机译：含气管道地下紧急停车阀的评估

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The purpose of emergency shut-down valves (ESDVs) is to provide the capability of dividing sour gas pipelines into segments, which can be individually isolated during upsets or ruptures by closure of the ESDVs. CIMARRON Engineering Ltd. (CIMARRON) performed a study in 2003 to evaluate installing ESDVs below ground for sour gas pipelines. The direct burial advantages of easier pigging, reduction in pipeline stresses, smaller surface footprint, less visibility, lower installation and maintenance costs, less chance of vandalism, and less chance of unauthorized operation are all desirable. This direct burial option, using weld neck valves, is contrary to the conventional above ground installation with flanged valves, which dominates the practice in Western Canada. CIMARRON has used the criteria of feasibility, benefits, and limitations in evaluating the option of direct burial. To these three (3) criteria have been added measures to mitigate any identify limitations or constraints. In addition, piggability for cleaning and in-line inspection is considered to be a required feature for all sour gas pipelines. CIMARRON has reviewed and gathered extensive field data and background case studies for the preparation of this paper. In addition to the industry standard of above ground ESDVs, they are also occasionally installed in vaults. However, entry into any vault constitutes a "confined space entry" with its associated implications on safety. CIMARRON contends that if certain capabilities are provided for functional access from the surface to a buried ESDV, then compliance with all requirements of the governing legislation is possible without being able to physically see or access the buried valve. Enhancements to the responsiveness of ESDVs to pipeline upsets and failures are important. Using SCADA at both wellsites and ESDV sites can provide a significant advantage in limiting any potential sour gas releases. The simplifications associated with buried ESDVs can constitute a significant advantage. Taking all these aspects into consideration, there are substantial benefits to burying ESDVs when compared to both the above ground and vaulted options.
机译：紧急关闭阀（ESDV）的目的是提供将酸性气体管道划分为多个部分的功能，这些部分可以在扰动或破裂期间通过关闭ESDV进行单独隔离。 CIMARRON Engineering Ltd.（CIMARRON）于2003年进行了一项研究，以评估在地下安装用于酸性气体管道的ESDV。直接埋葬的优点是易于清管，减少管道应力，较小的表面占地面积，较少的可见度，较低的安装和维护成本，较少的被破坏的机会以及较少的未经授权的操作。使用焊接颈阀的这种直接埋葬选项与传统的带法兰阀的地上安装相反，后者在加拿大西部占主导地位。 CIMARRON在评估直接埋葬方案时使用了可行性，收益和局限性标准。在这三（3）条标准中，添加了缓解任何识别限制或约束的措施。此外，清洁和在线检查的可清洗性被认为是所有酸性气体管道的必备功能。 CIMARRON已审查并收集了广泛的现场数据和背景案例研究，以准备本文。除了地面ESDV的行业标准外，它们有时还安装在金库中。但是，进入任何保险库均构成“密闭空间进入”，并对其安全产生影响。 CIMARRON辩称，如果提供了从地面到埋入式ESDV的功能访问的某些功能，则可以在不能够亲眼看到或接触到埋入式阀的情况下遵守法规的所有要求。增强ESDV对管道故障和故障的响应能力非常重要。在井场和ESDV场均使用SCADA可以在限制任何潜在的酸性气体释放方面提供显着的优势。与掩埋的ESDV相关的简化可以构成显着的优势。考虑到所有这些方面，与地面选项和拱顶选项相比，掩埋ESDV会有很多好处。

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