For ASME gas storage tanks in air media with a corrosion allowance of 0, inspection holes eliminate problems!
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The equipment has a DN400 size; the corrosion margin indicated in the data report is 0, and the medium is air. Is there any regulation that specifies that inspections can be omitted in such cases? (There are no two holes larger than DN40 on the device)
Pressure vessels that do not require internal inspection or cleaning can also be without inspection ports
The main issue is where the relevant provisions can be found; according to the description in UG-45, everything seems to not meet the requirements. The clause regarding the absence of corrosive media also does not include compressed air
UG46a): The compressed air covered in this section does not include dry air with a normal pressure dew point temperature equal to or below -50°F (-46°C). If the medium is the aforementioned dry air, there is no need to provide inspection holes.
I knew it was UG46; I mistyped it as UG45. I just don’t know which clause in UG46 applies
The compressed air covered in this section does not include dry air with a normal pressure dew point temperature of -50°F (-46°C) or lower; in such cases, UG46 does not need to be followed. If it does not fall under this category, then check UG46 b, c, d, and e to see which applies. In your case, it seems that UG46 does not need to be followed
The data report must cite the clause regarding exemption from inspection holes – how is it that one still doesn’t know which clause to use?