Regarding the SIS system
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The company has undertaken a gas holder project that involves an SIS system, but it lacks relevant experience. Is there anyone who is familiar with this area? Let me explain – which units need to work together on this? Which unit is in charge, and what is the process? It’s better to be more detailed. Thanks
I’m not sure what stage you’re at; you can refer to the security lifecycle of SIS systems mentioned in the standards. First, conduct a hazard identification for the project (such as Hazard and Operability Analysis or Hazop). You can carry out this analysis on your own or delegate it to a third party; in either case, it is best to involve the design team. Then, a safety integrity analysis (such as LOPA) is conducted on those scenarios with high inherent risk or severe consequences; this is usually carried out by a third party, and it is also advisable to involve the design team in this process. This helps determine which interlock circuits are necessary, and the design team is responsible for designing those interlock circuits (a Safety Requirements Specification SRS exists during the design process, and it is best to produce such a document). Once the design is completed, you can purchase the relevant equipment; it’s advisable to have a third party carry out safety integrity level verification calculations (SIL verification) at this stage, so that the equipment can be replaced promptly if it does not meet the requirements. If the verification is successful, it indicates that the device meets the safety integrity requirements; the device can then be installed, tested, and put into production, with regular inspections and maintenance to be carried out thereafter. In summary, the main reports required for a SIS system are: HAZOP/LOPA/SIL verification
Hello, I’m from the design firm. What role does the design firm play in this entire SIS process? What tasks need to be done?
Hello. In the sentence above, “you all” can be replaced with the property owners, and “third parties” can be replaced with your design agency; in other words, in addition to their regular design tasks, the design agency can also take charge of these analysis tasks
I have another question: does the design agency simply need to prepare the analysis report and the classification report (and possibly a verification report if necessary) as the final output?
The previous sentence also mentions the three main reports: HAZOP/LOPA/SIL verification; however, since you are the designer, it would be best to prepare a Safety Requirements Specification SRS if possible while designing the interlock circuits.
Corresponding modifications to the HAZOP LOPA process flow (interlocks for SIS in accordance with specifications and standards), SIS construction drawings, and SIL verification report.
For safety monitoring systems and equipment for gas tank pistons (laser level gauges, monitoring of piston inclination, drift of the piston, torsion of the piston, etc.), please contact Nanjing Haizhihan Intelligent Technology for SIL-certified solutions
Safety monitoring systems and equipment for gas tank pistons (laser level gauges, monitoring of piston tilt, drift of the piston, twisting of the piston, etc.; for such safety monitoring services, please contact Nanjing Haizhihan Intelligent Technology)