Desarrollo de la fase uno del pmbok para un sistema instrumentado de seguridad en el control de procesos de la estación páramo de ocp

Abstract

The present research was carried out with objective of developing phase one of the Project Management Body of Knowledge (PMBOK) for a Safety Instrumented System (SIS) in the process control at Páramo station from “Oleducto de Crudos Pesados” (OCP). Danger and risk were identified using the hazard and operational analysis (HAZOP) fro execution from layer of protection analysis (LOPA) and achievement of objective safety integrity levels (SIL targets) base on international standards. IEC: 61511 and ANSI/ISA 84. Four safety instrumented functions (SIF) were identified and recommendation to be designed to reduce the levels to tolerable levels. Then, it developed the safety requirement specifications (SRS) and calculation of probability failure in demand average (PFDavg) of the designed SIFs tan execute SIS, which established a first excercise about the action plans to be execute to reach the level of appropiate risk obtained in the LOPA. The engineering details was conceived SIFs and the recommendation, therefore, it was obtained the architecture SIS; to valide the project a revaluation of Project was carried out verifying rick reduction and obtaining the required SIL levels. It based on desing and defined requirements, pipeline and instrumentation diagrams of SIS and cause-effect matrix (MCE) were obtained for programming logic of safety PLC (SPLC), base don standard IEC: 61508 the instrumentation at SIS was selected and after an economic evaluation major equipment of Project was obtained. It is concluded that by having SIS independent of the basic process control system (BPCS), it is posible to achieve functional safety in pumping station, at occurrence of atypical deviation, process helps to bring the station to a safe state. It has determined that it is imperative to comply with international standards IEC: 61511, IEC:61508 and ANSI/ISA 84. It is recommended that SIS be developed for the other stations that make up the OCP pipeline