May I ask, for a 30-cubic-meter methanol storage tank, how many level gauges are required according to the specifications?
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This post was last edited by zb030121eric on 2023-3-2 09:48. How many level gauges are required for a 30-cubic-meter methanol storage tank according to the standards? Which is better, a fork-type level gauge or a capacitive level gauge?
According to the specifications, a 30-cubic-meter methanol storage tank should be equipped with four level gauges, namely low-low, low, high, and high-high. -
According to Section 7.3.2.2 of Chapter 9 of the \"Code for Safety, Fire Protection and Hygiene of Storage Tanks\": \"Storage tanks shall be equipped with four level indicators – for low-level, lower low-level, high-level, and upper high-level – to facilitate the emptying or filling of the liquid, and effective level indication devices shall be installed.\" ”Therefore, a 30-cubic-meter methanol storage tank should be equipped with four level gauges. When selecting a level gauge, since both fork-type level gauges and capacitive level gauges have their own advantages and disadvantages, it is generally necessary to conduct a comprehensive evaluation based on factors such as the conditions for level measurement, the protection rating of the instrument, the operating environment, temperature, the range of level changes, and the signal output method, in order to choose the appropriate type of level gauge. -
Please pay attention to the volume of the storage tank to determine whether it reaches the critical level that constitutes a significant hazard when filled with liquid; if not, installing one remote transmitter and one local level gauge is sufficient.
Where can I find the critical value?
Where can I find this standard specification? Is GB50051-2013 the correct standard number?
Yes, GB50051-2013 \"Code for Safety, Fire Protection and Hygiene of Storage Tanks\" can be referred to for this issue. -
Criteria for Identifying Major Hazard Sources (GB18218-2021) Table 1: Names of Hazardous Chemicals and Critical Values
Hello, could you share this specification? Based on your standard number, what I found is the \"Code for Chimney Design\"
The critical amount for methanol is 500 tons; here, 30*0.79=23.7 tons, which is less than the critical amount. The normal setup consists of an on-site level gauge and a remote level gauge; the remote level gauge is used in the DCS to set up high and low level alarms.