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Eight tips for installing flammable gas alarms
Once the fixed-point installation of the flammable gas alarm is in place, its position cannot be easily changed. According to the work experience accumulated over the years, the following points should be considered in specific applications.
(1) Find out which leak points are possible for the devices to be monitored, analyze their leakage pressure, direction, and other factors, and draw a probe position distribution chart, which is divided into three levels of I, II, and III according to the severity of the leak.
(2) Judging the leakage direction of combustible gas when a large amount of leakage occurs according to specific factors such as the airflow direction and wind direction of the location.
(3) According to the density of the leaked gas (greater or less than air), combined with the air flow trend, a three-dimensional flow trend chart of the leak is synthesized, and an initial set point scheme is made at the downstream position of the flow.
(4) Investigate whether the leak state at the leak point is slight leak or spray. If it is a slight leak, the set point should be closer to the leak point. If it is a spray leak, stay away from the leak. Synthesizing these conditions, the final set-up plan was drawn up. In this way, the quantity and variety to be purchased can be estimated.
(5) For places where there is a large amount of flammable gas leakage, a detection point shall be set every 10-20m apart according to relevant regulations. For small and discontinuously running pump rooms that are not on duty, you need to pay attention to the possibility of flammable gas leakage. Generally, a detector should be installed at the downwind.
(6) For places with hydrogen leakage, the detector should be installed on the plane above the leak point.
(7) For media with a gas density greater than air, the detector should be installed on a plane below the leak point, and pay attention to the characteristics of the surrounding environment. For places where flammable gas is likely to accumulate, special attention should be paid to the setting of safety monitoring points.
(8) For open flammable gas diffusion and escape environment, if there is no good ventilation condition, it is easy to make the flammable gas content in the air of a certain part close to or reach the lower explosive concentration. These are safety monitoring points that cannot be ignored. .