Safety Integrity Level (SIL)

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Safety Integrity Level (SIL) Classification

sil9a

5 Classes of demand ( D)

D0: negligible demand rate; the scenario has not been heard of in industry;

D1: the interval between demands is more than 20 years; the scenario is unlikely to occur during the lifetime of the platform, but has been heard of in industry;

D2: the interval between demands is 4 to 20 years; the scenario is likely to occur during the lifetime of the platform or has already occurred before in the platform;

D3: the interval between demands is 6 months to 4 years; the scenario is likely to occur in the time period between two major stops;

D4: the interval between demands is less than 6 months; the scenario occurs several times per year on the platform

Risk Matrix to Determine Personal SIL Level

sil9b

 

Correction Factor-Injury:

a)Averting the Danger

sil5

b) Exposure Time

sil6

c) Mitigation

sil7

Risk Matrix to Determine Economic SIL Level

sil8

Risk Matrix to Determine Environmental SIL Level:

sil9

 

For industrial safety related topics click on the links below

https://kishorekaruppaswamy.in/2012/04/04/chemical-hazard-pictograms/

 

https://kishorekaruppaswamy.in/2012/01/18/ingress-protection/

 

https://kishorekaruppaswamy.in/2017/02/23/safety-integrity-level-sil/

 

https://kishorekaruppaswamy.in/2017/11/20/hydrogen-sulphide-h2s/

 

https://kishorekaruppaswamy.in/2017/12/17/hazardous-area-classification/