Oil depot safety instrumented system
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For a Class 4 oil storage facility, since it meets the criteria for being considered a major hazard source, the local safety supervision agency and experts required the installation of an independent safety instrumented system. But there are not many control points in the oil depot itself, namely the liquid level and temperature, plus quantitative loading. I would like to ask everyone how we should consider setting up this independent safety instrumented system
There are quite a few components inside: level sensors, temperature sensors, pressure sensors, dosing control valves for loading, dosing shut-off valves, inlet valves for the oil depot, outlet valves for the oil depot, and so on. Firstly: There must be a low-level interlock; when the liquid level drops to a certain value, the outlet valve of the oil depot as well as the pump should be shut down to prevent loading ； There should be a high-level interlock for the liquid level; when the level rises, the feed valve is closed and the flow is directed to another oil tank. Temperature and pressure are similar. When the static grounding clip is not properly grounded, tank filling operations cannot be carried out; pressing the on-site emergency stop button can halt the tank filling process. If there are a few more oil depots, it will be a system.
What a crap safety instrument system. . . Bro, doesn’t it seem like adding extra details that are unnecessary? .
All of these things you mentioned have already been implemented in conventional control systems. The problem now is that the safety supervision agency requires a safety instrument system that is independent of conventional controls.
What you say makes sense, but there’s nothing we can do about it – according to the current requirements set by the safety supervision agency, all projects that fall under the category of \"two key aspects and one major risk\" must be equipped with this safety instrument system.
These should be incorporated into the SIS system; they require separate setup and can communicate with the DCS control system. However, it is not possible to perform DCS and communicate with SIS.
The safety supervision agency requires a safety instrument system that is independent of conventional controls: oil depots must be equipped with explosion-proof emergency shut-off valves. The interlock control system consists mainly of devices such as emergency shut-off valves for oil depots, transfer linkages, level gauges, level gauge instruments, level control software, extended alarm devices, level signal conversion boards, and automatic and manual interlock control boxes. **It reduces the safety risks in oil depots.
It is estimated that a sil2 or higher-level redundant system is required
Exactly; from the perspective of the safety supervision agency, the security level of conventional control systems is not sufficient to ensure a high degree of safety.