Safety Integrity Evaluation of a Butane Tank Overpressure Evacuation System According to IEC 61508 Standard

Omeiri, Hanane; Innal, Fares; Hamaidi, Brahim

doi:10.1007/s11668-015-0031-8

Cited by 5 publications

(7 citation statements)

References 9 publications

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“…KHAWLA DIB (1) , YOUCEF ZENNIR (1) LRPCSI Laboratory Skikda, Univers (2) Automatic laboratory, (3) Automatic laboratory,…”

Section: Input Elements Detectionmentioning

confidence: 99%

“…61508standards provides a structured approach relying on hazards identification in order to establish safety requirements for safety instrumented systems (SISs) [1]. LOPA (layer of protection analysis) starts with data developed in qualitative hazard ation such as HAZOP (Hazard and Operability) and accounts for each identified hazard by documenting the initiating cause and the protection layers.…”

Section: Introductionmentioning

confidence: 99%

“…IEC 61508 approach: risk and safety integrity level [1] In this context, the main purpose of this paper is to verify that the intended safety integrity level of a safety instrumented system of Skikda's refinery crude oil heater is achieved. Otherwise propose a solution to ameliorate the safety instrumented system to mitigate the studied scenario.…”

Section: Introductionmentioning

confidence: 99%

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Safety Integrity Evaluation of crude oil heater According to IEC 61508 Standard

DIB¹,

ZENNIR²,

BOUNEZOUR³

et al. 2022

AJSS

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the main object of this paper is to evaluate safety barriers intervening against overpressure implemented on a crude oil heater using layers of protection analysis approach suggested in IEC 61508 (International Electrotechnical Commission) Standard for the determination of safety requirements are illustrated. Accident scenarios are pre-identified using Hazard an Operability approach, Fault tree approach is required for an effective risk assessment process. In order to better appreciate accident scenarios, PHAST (Process Hazard Analysis Software Tool) is utilized to simulate them.

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“…KHAWLA DIB (1) , YOUCEF ZENNIR (1) LRPCSI Laboratory Skikda, Univers (2) Automatic laboratory, (3) Automatic laboratory,…”

Section: Input Elements Detectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Safety Integrity Evaluation of crude oil heater According to IEC 61508 Standard

DIB¹,

ZENNIR²,

BOUNEZOUR³

et al. 2022

AJSS

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“…The exploitation of the approximate Markov model allows us to establish the corresponding PFH formula based on the following relation [18]:…”

Section: Pfh Formulationmentioning

confidence: 99%

“…where: The examination of Eqns. ( 17) and (18) shows that the first terms of the summation in Eq. ( 17) are almost similar to the IEC 61508 PFH formula (Eq.…”

Section: Markov Modelmentioning

confidence: 99%

Consistency Checking of the IEC 61508 PFH Formulas and New Formulas Proposal Based on the Markovian Approach

Omeiri¹,

Innal²,

Liu³

2021

JESA

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Safety Instrumented Systems (SISs) are of prime importance in protecting people, assets and environment from hazardous events. Therefore, it is important to be able to assess accurately their performance indicators. For this end, IEC 61508 standard has provided two reliability metrics: the average failure probability of a SIS lowly demanded (PFDavg) and the average failure frequency of a SIS highly or continuously demanded (PFH). The aim of this paper is to investigate the IEC 61508 PFH formulas and to propose new ones based on the Markovian approach. Indeed, the new edition of IEC 61508 provides PFH formulas reflecting the possibility of automatic shutdown of the monitored process upon detection of a dangerous failure in the SIS. However, the IEC 61508 attempt remains incomplete and provide non-conservative results, which is dangerous from a safety point of view.

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