Is it necessary to perform flaw detection on the furnace flue?
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Does the flue of a heating furnace need to be inspected for defects? If necessary, what are the standards for construction acceptance?
The converter flues I’ve seen have already been tested before leaving the factory, so they can be installed directly upon arrival.
What is the purpose of flaw detection, and what are the risks if it is not carried out?
The flue, which is subjected to external pressure, is a primary pressure-bearing component and requires flaw detection. It will be specified on the design drawings.
It’s different from what I heard. I asked the designers of the heating furnace, and they said that no flaw detection is necessary?
It would be best for you to take a look at the design drawings; if the designers think it’s not necessary, then it usually isn’t needed. It also depends on the type of flue you have. If it’s an external one, of the kind that is installed by oneself, then it’s not necessary; but if it’s located inside a boiler or container, it’s required. As for the part that is welded to the tube sheet, it depends on the specific circumstances.
You first need to determine whether this flue is a primary pressure-bearing component； Next, it is necessary to determine whether the weld is of type A, B, or C. Finally, it is determined based on the technical inspection regulations whether non-destructive testing is required, as well as the testing ratio and the acceptable quality level.
It’s not a furnace tube inside the equipment; it’s located outside, and it’s there merely to allow the flue gas to pass through. The pressure is very low, close to atmospheric pressure
I’ve never seen any that required flaw detection; many of them are homemade.
This mainly depends on the design technical requirements; it generally does not fall under the category of pressure pipelines. For weld inspection, a kerosene leakage test is generally sufficient.
Kerosene leaks have become a big problem – is there still anyone who deals with this?