In 2021, our company obtained the SIL3 safety function certification certificate.

2021-12-01

In 2021, our company obtained the SIL3 safety function certification certificate.

What is SIL 3?
Safety Integrity Level (SIL) is a SIL level that measures the impact of a safety instrumented function (SIF) on a particular hazard-related risk, the higher the efficiency of the function in reducing the risk it mitigates.
SIL 3 is one of the safety integrity levels defined by the IEC 61508 standard. It is defined by an on-demand failure risk reduction factor of 1.000-10.000 and an hourly failure probability of 0.000001-0.0000001.
It is a quantitative evaluation of the acceptable failure level of a safety function, so it represents its safety and reliability.
IEC61508 four safety integrity levels are defined, labeled SIL 1 to SIL 4. SIL 3 is the highest safety integrity level economically feasible for most industrial products.

Why is SIL 3 important?
The Safety Integrity Level (SIL) of the Safety Instrumented Function (SIF) in the Safety Instrumented System (SS) is not selected at random or on a best-effort basis. On the contrary, the appropriate SIL level is determined by a variety of methods, such as safety layer moment library (SLM), protective layer analysis (LOPA) or fault tree analysis (FTA).
These methods consider the types of accidents that may occur within the product system, their probabilities, the ways in which they are related, and their consequences in terms of cost. Therefore, the recommend SU level is the level appropriate to the risks faced by the product system.
In other words, any given safety integrity level (including SIL 3) is not just an indicator that should be pursued, but a direct reflection of the risks your organization faces. Within the framework of IEC 61508, risk is defined on the basis of cost per time unit. If SI and L3 are determined to be an appropriate SIL, it means that SIL3 is a * low integrity level that can reduce the risk (I. e. cost per unit time) associated with a particular hazard to an acceptable level.

Key words:

Butterfly valve, ball valve, regulating valve, globe valve, gate valve, check valve

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