ABSTRACT

This paper focuses on improving PL safety by providing a methodology for detecting, locating rupture and reducing emergency response time. Pipeline rupture can be due to many factors such as such as corrosion, third party damage or over pressure in the system. In the oil & gas Industries, there are several rupture prevention measures to monitor and ensure safe pipeline operation. These include regular inspection, corrosion program and ongoing maintenance program. However, in few cases where we have rupture, the consequences can be serious. Over the last few years, major oil and gas industries experienced several major incidents related to pipeline ruptures. In all of these incidents, a common contributing factor to the problem is the time required to report and isolate rupture location. Therefore, to mitigate rupture consequences, the proposed solution is to help Pipelines Operations to reduce the response time to isolate rupture either through Manual or Automatic intervention. This paper considers current pipeline operation emergency response plan individual steps and look for area of improvements to reduce response time. In this paper, a comprehensive pipeline hydraulics transient analysis was performed for liquid and gas services addressing single and network pipeline systems to improve pipeline operating companies' emergency response plan during pipeline ruptures. The pipeline protection break set points for gas, liquid, single and network example cases are also presented in detail in the report. Implementation of study findings and recommendations will mitigate the harmful Consequences of a pipeline Rupture by MINIMIZING TIME to ISOLATE Ruptured Pipeline.

INTRODUCTION

To meet corporate management objective of protecting environment and improving safety, the study was conducted to mitigate the harmful consequences of a rupture by minimizing time to isolate ruptured pipeline. Rupture consequences could be: Losing lives due to Toxic release, explosion or fire. Oil spill or gas released can damage the environment. Rupture impacts on other facilities including adjacent pipelines. In addition to loosing production and interrupting business. In order to minimize the pipeline rupture losses, one needs go over the critical components of pipeline rupture, Figure 1. In the event of rupture, at any point along the pipeline system, the magnitude of losses to people, environment, assets is a function of the time to isolate rupture. So the longer it takes to report and isolate rupture, the more damages. It is also a function of operational parameters such as pipeline capacity, operating pressure & temperature and fluid composition. At the second part of the equation, we have little control over pipeline flow rate, pressure or toxicity. Therefore, to minimize the losses, it is essential to isolate the damaged section as quickly as possible. To reduce the response time to isolate rupture location, Operation current emergency response plan should be considered to look for areas of improvement. The emergency plan is shown in Figure 2.

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