IEC61508

FSA stage 1 of subsea well intervention system

jorgemartiresFunctional safety, Subsea engineering

MAR consulting AS performed a functional safety assessment (FSA) stage 1 of a subsea riser less well intervention system. The system will have two SIL2 safety instrumented functions (SIF), based on the Norwegian Oil and Gas Association (guideline 070) and IEC standards (61508 and 61511): One emergency shutdown (ESD); One emergency quick disconnect (EQD). Following IEC 61508/61511 safety lifecycle, stage 1 covered: Hazard analysis; Allocation of safety functions to protection layers; Initial version of safety requirement specifications (SRS); Management of functional safety and verification and validation. Documentation was readily available to demonstrate compliance with functional safety requirements at this stage of […]

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FSA stage 2 of subsea production system

jorgemartiresFunctional safety, Safety and reliability engineering

MAR Consulting will perfom a functional safety assessment (FSA) stage 2 of a subsea production system (SPS) bound to be installed and operate in the Norwegian Continental Shelf (NCS). The end client is the  company engineering the SPS. The contract is in effect immediately. FSA stage 2 focus on the design and engineering of the safety instrumented systems (SIS). In this case, there are two autonomous independent SIS aiming at reducing risks to acceptable levels. Furthermore, MAR Consulting will ensure that the assumptions and actions identified on the previous FSA (stage 1) were verified and acted upon. In addition, the client requested […]

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Functional safety technical support to jack-up drilling rig upgrade

jorgemartiresFunctional safety, Safety and reliability engineering

MAR Consulting AS has been contracted to provide functional safety support to a jack-up drilling rig update of a major drilling contractor. The drilling rig will enter a new contract on the Norwegian Continental Shelf (NCS), where requirements for functional safety are considerably stringent when compared to other parts of the world. MAR Consulting will support the client to achieve a level of functional safety adequate to operate a drilling rig on the NCS. MAR Consulting has extensive experience with Norwegian rules and regulations regarding functional safety. Namely the Norwegian Oil and Gas Association (NOG) “Application of IEC 61508 and IEC […]

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FSA stage 4 on long operating oil and gas asset

jorgemartiresFunctional safety, Safety and reliability engineering

MAR Consulting partly produced a functional safety assessment, FSA stage 4 of a long operating oil and gas asset in the Norwegian Continental Shelf (NCS). The main responsibilities were to assess the safety requirements specifications (SRS) for the different safety instrumented functions (SIF) required to operate the asset; and how they have been maintained and applied during the operating lifetime of the facility. Of special importance to an FSA stage 4 is to understand how functional safety has been maintained during the many years of operations. In general, nowadays, there is special focus and emphasis on functional safety during the […]

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Functional safety assessment of automated safety system

jorgemartiresFunctional safety

MAR Consulting AS performed a functional safety assessment (FSA) stage 1 of a new emergency shutdown system (ESD). The reason for the upgrade is to substitute an obsolete automated safety system in an operating offshore oil and gas facility in the North Sea. The safety instrumented system (SIS) lifecycles phases assessed in this FSA were: hazard analysis; allocation of safety functions to protection layers; the initial version of safety requirement specifications (SRS); management of functional safety plan and verification activities. MAR Consulting followed the methodology developed based on hands-on functional safety experience (e.g. http://www.marconsulting.no/2017/06/10/sil-compliance-for-fg-systems and http://www.marconsulting.no/2017/05/25/fsa-stage-1-of-subsea-production-system/). In essence, a detailed evaluation of the […]

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Reliability assessments of safety critical equipment

jorgemartiresFunctional safety, Safety and reliability engineering

MAR Consulting AS is performing periodic reliability assessments of different types of safety critical equipment installed on the offshore platforms of a major Danish oil and gas operator. Among others, the assessment covers shutdown valves, blow down valves, different types of sensors and transmitters, etc….The work consists of extraction of offshore failure reports; failure analysis and classification; and calculation of failure rates and probability of failure on demand (PFD). The results are directly utilized to adjust (or support) the preventive maintenance intervals, resulting in major cost savings and/or increased safety and reliability.

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