Safety Technology Exchange Edition: Daily Question (2016.5.5)

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Type: Fill-in-the-blank question. Question: [Safety Techniques for Hot Work] A hot work analysis should be conducted before starting the work, with the following requirements: 1. The monitoring points for the hot work analysis must be representative; when working inside large equipment, monitoring and analysis should be carried out at the upper, middle, and lower sections； When performing hot work on long material pipelines, sectional analysis should be carried out after thoroughly isolating the area ； 2. When performing welding or heating work outside the equipment, a combustion analysis must be carried out within a range of not less than ____ meters from the point where such work is being done ； 3. The interval between fire hazard analysis and the actual welding work should generally not exceed ____ minutes; if the site conditions do not permit, this interval can be increased slightly, but it should not exceed 60 minutes ； 4. If the interruption time of the task exceeds 60 minutes, re-analysis is required; a fire hazard analysis must be conducted before starting any heating work each day ； Monitoring should be carried out at all times during special hot work operations ； 5. When using portable combustible gas detectors or other similar devices for analysis, the detection equipment must be calibrated using standard gas samples and found to be accurate. Answer: 10 ； 30