The storage tank is equipped with two types of level gauges
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Which standard specifies that storage tanks must be equipped with two level gauges? How are the two different types of level gauges determined? What if I want to set up an SIS system? One more? If a magnetic flip-type level gauge is used with remote transmission, so that there is a display at the site as well as one for remote monitoring, can these be considered two separate units?
No, the regulations have specific requirements for such operating conditions；
This question has been discussed before; see http://bbs.hcbbs.com/thread-901298-1-1.html
That is, magnetic flip-type level gauges do not allow remote transmission of data; they can only display the readings on-site. So does that mean another level gauge is needed for remote transmission?
No, current regulations specify that high-risk pressure vessels must be equipped with two sets of level gauges based on different principles. For example, spherical tanks, a set of radar level gauges, and a set of magnetic flap level gauges.
Is it necessary to install an on-site level gauge in atmospheric pressure storage tanks? For example, very large storage tanks, those over 3000 m3.
Like large storage tanks, they also have on-site level gauges, float-type ones, etc. For the SIS, it’s sufficient to add alarm points for high or low liquid levels.
Local magnetic flap + remote magnetic flap cannot be considered as two separate units. We usually need to add a radar before it can be considered as 2.
They cannot be counted as 2; generally, if safety regulations exist, both level gauges are required to use different measurement methods. For example, there are regulations regarding liquid chlorine storage tanks in the chlor-alkali industry, as well as regulations for liquid ammonia storage tanks in the liquid ammonia industry within Shandong Province.
Which standard specifies that two sets must be installed?
May I ask, does an 8-ton ethanol tank require two different types of level gauges? In accordance with the requirements of Article 5.5 of GB17681-1999