Is it necessary to provide inspection holes in the equipment?
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There is a vertical metering tank used for storing ethylene oxide, with an operating pressure of 0.8 MPa, an operating temperature below 80 degrees Celsius, and a volume of 10 cubic meters. The material used for construction is S30408. Is it necessary to install inspection holes in such a setup?
Handholes or manholes must be provided as required by the code.
Set manholes or handholes according to capacity regulations； .
The code only states that inspection holes should be provided as needed, for example in large storage tanks (tanks of various types), in equipment whose internal components require regular inspection or replacement, and in equipment that has been corroded by the medium. Ethylene oxide is a flammable, explosive, and toxic substance; I have no experience working with equipment of this type. However, I think inspection holes shouldn’t be provided, as they represent potential leakage points.
Inspection holes need to be provided to meet the requirements for regular inspections
It is true that installing inspection holes for highly hazardous media creates multiple leakage points, but is there any precedent for not having such holes in the case of ethylene oxide?
Manholes and handholes are necessary, but there’s no need for leak detection holes, as they aren’t lined.
If you don’t install manholes or anything like that, how do you plan to weld the final ring seam during the tank’s fabrication?