Posting a request for help on behalf of a friend
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The tubular furnace in the device managed by a friend is made of 20# material; due to a clog, the control valve was left fully open resulting in no flow, and it wasn’t discovered until 12 hours of dry burning had occurred. The furnace temperature is 475°C, and the maximum temperature of the furnace tubes is 439°C. After discovery, the secondary line was activated promptly and the flow was normal. On-site infrared testing revealed no significant uneven temperature distribution, and visual inspection of the furnace tubes showed no obvious deformation. However, it has been confirmed that the maximum temperature for pipes made of 20# steel is 450°C. Therefore, I would like to ask my friends if they have encountered similar situations. How should such situations be handled? What impact does this have on the furnace tubes? Will the strength of the material change, and how can that be determined? Are there any good ways to identify it? Are there any good methods to extend lifespan in the later stages?
How many feed lines does this furnace have? I mean, are some of the furnace tubes burning out dry or all of them? The safest approach is to stop and conduct 100% non-destructive thickness testing of the furnace tubes
Four flow rates, one is burning out. During the startup phase, the conditions are not available to stop and conduct inspections.