Precautions for the application of combustible gas detectors
(1) Identify the potential leakage points to be monitored, analyze their leakage pressure, direction, and other factors, and draw a distribution map of probe positions. Classify them into three levels based on the severity of the leakage: Level I, Level II, and Level III.
(2) Based on specific factors such as the direction and wind direction of the location, determine the direction of combustible gas leakage when a large amount of leakage occurs.
(3) Based on the leakage (greater or less than), combined with the trend of air flow, a three-dimensional flow of leakage is synthesized, and an initial setting plan is made at the downstream position of its flow. Based on these situations, develop a final location plan. In this way, the quantity and variety that need to be purchased can be estimated.
4) For places with significant combustible gas leaks, a detection point should be set up every 10-20m according to relevant regulations. For unmanned small and discontinuous pump rooms, attention should be paid to the possibility of combustible gas leakage, and a detector should generally be installed at the lower air outlet.
(5) For locations with hydrogen gas leaks, detectors should be installed on a flat surface above the leak point.
(7) For media with a gas density greater than air, the detector should be installed on the lower side below the leakage point, and attention should be paid to the characteristics of the surrounding environment. Special attention should be paid to the setting of safety monitoring points in places where flammable gases are prone to accumulate.
(8) For open environments where combustible gases diffuse and escape, if there is a lack of good ventilation conditions, it is also easy for the combustible gas content in a certain part of the air to approach or reach the lower explosive limit concentration. These are important safety monitoring points that cannot be ignored. According to the analysis of the on-site accidents, more than half of them were caused by incorrect installation and calibration. Therefore, it is necessary to introduce the precautions for correct installation and verification to reduce malfunctions
