Using DCS for SIL1 interlocks – seeking advice
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The device should have two circuits for interlocking: one for sil1. Using SIS is too expensive, so the management wants to use DCS instead. Which expert has done this? What documents will be required for the project acceptance at that time?
It won’t work; in DCS, control interlocks that do not fall under the SIL category can be used, but for those that do require a SIL rating, SIS must be employed. Not all interlock logic requires a SIL level; it depends on the competence of the evaluation agency
SIL1 cannot be placed in a DCS; if it has already been designated as SIL1, there’s no need to bother further. . . During the HAZOP discussions, you can take certain measures to lower the rating; if it can be reduced to SIL0, then the DCS should still be acceptable
Don’t be silly; what the boss says isn’t right either. If you need to argue, go ahead and do it
You can ask your supervisor for advice on redoing the SIL classification. Within the framework of compliance with laws and regulations, it is possible to reduce the SIL level through other measures. Feel free to contact me if needed. 137 0131 2981
It is not possible to use DCS for SIL1. The specific reasons are as follows: 1. DCS can reach at most SIL1, which is the highest level possible. 2. DCS and SIS have different design concepts; SIS is designed for safety in the event of power loss. 3. A SIL certificate is required for critical applications, whereas DCS does not provide such a certificate. If the budget is insufficient, SIL2 products can be used; they are not expensive.
DCS doesn’t have SIL certification, right?； According to the principles for SIL grading and validation, the entire circuit must meet the requirements for SIL1 certification; if even one requirement is not satisfied, it cannot be classified as SIL1 level
DCS doesn’t have SIL certification, right?； According to the principles for SIL grading and validation, the entire circuit must meet all the requirements for SIL1 certification; if even one requirement is not satisfied, it cannot be classified as SIL1 level
Doing this will lead to endless problems. . . I ask you this question every time I check. . Let’s see what you do