ESD风险图？ iec61511-part3 总共提出下列几种方法 , 决定safey instremented function (sif) sil level annex c to annexd) annex c (informative) the safety layer matrix method .......................................................37 c.1 introduction .........................................................................................................37 c.2 process safety target ...........................................................................................39 c.3 hazard analysis ...................................................................................................39 c.4 risk analysis technique .......................................................................................40 c.5 safety layer matrix...............................................................................................41 c.6 general procedure ...............................................................................................42 annex d (informative) determination of the required safety integrity levels – a semiqualitative method: calibrated risk graph .......................................................................45 d.1 introduction .........................................................................................................45 d.2 risk graph synthesis............................................................................................45 d.3 calibration...........................................................................................................46 d.4 membership and organization of the team undertaking the sil assessment...........48 d.5 documentation of results of sil determination......................................................48 d.6 example calibration based on typical criteria ........................................................48 d.7 using risk graphs where the consequences are environmental damage.................51 d.8 using risk graphs where the consequences are asset loss ....................................52 d.9 determining the integrity level of instrument protection function where the consequences of failure involve more than one type of loss ..................................53 annex e (informative) determination of the required safety integrity levels – a qualitative method: risk graph........................................................................................................55 e.1 general ...............................................................................................................55 e.2 typical implementation of instrumented functions .................................................55 e.3 risk graph synthesis............................................................................................56 e.4 risk graph implementation: personnel protection ..................................................57 e.5 relevant issues to be considered during application of risk graphs .......................59 annex f (informative) layer of protection analysis (lopa).................................................61 f.1 introduction .........................................................................................................61 f.2 layer of protection analysis .................................................................................61 f.3 impact event........................................................................................................62 f.4 severity level......................................................................................................62 f.5 initiating cause ....................................................................................................63 f.6 initiation likelihood ...............................................................................................63 f.7 protection layers..................................................................................................63 f.8 additional mitigation ............................................................................................64 f.9 independent protection layers (ipl) ....................................................................64 f.10 intermediate event likelihood................................................................................65 f.11 sif integrity level.................................................................................................65 f.12 mitigated event likelihood.....................................................................................65 f.13 total risk .............................................................................................................65 f.14 example ..............................................................................................................66 iec61511 can be found as the following: https:///viewthread.php?tid=157308&highlight=iec61511 查看更多
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