Requirements for X-ray inspection of boiler manhole rings
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Hello everyone, I have a question regarding the radiography of boiler manhole rings – I haven’t found any clear specifications on this in the relevant standards. May I ask if there are any requirements?
In line with the radiography requirements for boiler longitudinal seams, grade 2 is considered acceptable
The question raised by the poster is great; I’m paying close attention to this issue and look forward to detailed analysis and explanations from experts. . . . . .
First, thank the second floor, and then I would like to ask which standard this requirement comes from?
Page 25, clause 4.5.4.4, first item of the pot regulations
Thank you, 5th floor, I see it. I’m no longer working on boiler design; I don’t even know the relevant regulations anymore
Page 26 of the boiler regulations does not mention the boiler manhole ring.
Page 26 of the pot regulations does not mention the manhole ring.
Hello! Clause 4.5.4.4(1) of the boiler code pertains to the requirements for the pressure-bearing components of boilers. The manhole ring falls under the category of pressure-bearing components of the boiler, as specified in clause 3.23.1(4) of the boiler regulations.
It should be understood that the welds used to join the manhole rings that are located outside the cylinder belong to non-compressed areas, while those parts of the manhole rings that are inside the cylinder are subjected to external pressure and thus are in a favorable stress condition. The weld at the connection point with the cylinder body is only as long as the thickness of the cylinder body, and fillet welds are present on both the inside and outside of the cylinder at this location, ensuring high safety. Neither the “Pot Regulations” nor JB/T1613 specify anything regarding this aspect, so enterprises should be able to refrain from conducting non-destructive testing