Points to Note During Installation and Use of Combustible Gas Detectors
Combustible gas detectors can rapidly detect the presence of combustible gases in the air and check whether the gas concentration has reached the explosive limit, helping prevent explosion accidents in critical moments.
Points to Note During Installation and Use of Combustible Gas Detectors:
① Identify potential leakage points of the equipment to be monitored, analyze factors such as leakage pressure and flow direction, draw a layout plan for probe positions, and classify risks into Grade Ⅰ, Ⅱ and Ⅲ according to leakage severity.
② Determine the diffusion direction of combustible gas in the event of a large-scale leakage based on site conditions including airflow and wind direction.
③ Develop a 3D diffusion trend diagram of leaked gas according to the gas density (heavier or lighter than air) and air movement patterns, and formulate an initial layout plan for detectors at downstream positions of gas flow.
④ Analyze the leakage type at each point: slow seepage or jet leakage. For slow seepage, place detectors closer to the leakage point; for jet leakage, set detectors slightly further away. Develop the final layout plan by integrating all above conditions, so that the required quantity and types of detectors can be estimated.
⑤ For areas with high risks of large combustible gas leakage, install one detection point every 10–20 m in accordance with relevant regulations. For unattended small pump houses operating intermittently, be alert to potential combustible gas leakage; generally install one detector at the downwind side.
⑥ For locations with hydrogen leakage risk, mount detectors on the horizontal plane above the leakage points.
⑦ For media with gas density higher than air, install detectors on the horizontal plane below the leakage points and take surrounding environmental features into consideration. Special attention shall be paid to setting safety monitoring points in areas prone to combustible gas accumulation.
⑧ In open environments where combustible gas diffuses and escapes, poor ventilation may cause local combustible gas concentration to approach or reach the lower explosive limit. Such locations shall not be overlooked when arranging safety monitoring points.
