This article specifies the management requirements for the alarm and interlocking systems for key parameters such as temperature, pressure, liquid level, combustible and toxic gases in the oil and gas tank farm. Oil and gas storage tanks should be equipped with level gauges, thermometers, pressure gauges, flammable (toxic) gas alarms, as well as high-level alarms and high-high-level automatic interlocking cut-off measures in accordance with the requirements of standards and specifications. The alarm signal should be sent to The control room or operation room where the operator is resident, and the alarm should be set with sound and light alarms to detect abnormalities in time and deal with them. Therefore, it is necessary to ensure that the alarm and interlock systems are in good condition and in use.

Typical accident case: 

On December 11, 2005, a fire and explosion accident occurred at Bunce field Oil Depot in the United Kingdom. More than 20 large oil storage tanks were burned, 43 people were injured, and the direct economic loss was 250 million pounds. The main cause of the accident was the measurement system of automatic storage tank fails, and the electronic monitors of some storage tanks, piping systems and related alarm equipment are in abnormal working conditions.