Multi-chamber containers have their design and manufacturing requirements specified according to their respective categories
Thread Content
The major regulatory standards stipulate that multi-chamber containers should have their design and manufacturing requirements defined according to their respective categories; for example, in the case of heat exchanger tubes that are filled with normal temperature water and not under pressure, the tube box does not need to be designed or manufactured as a pressure vessel, and X-ray inspection is not required for the tube box.
The key is what medium is in the shell side and what the pressure is.
This post was last edited by Menghuan100 on 2017-5-24 at 20:46. The shell side is heated by saturated steam at 150 degrees to raise the temperature of the cold water on the tube side to 50 degrees.
In other words, since the shell side is exposed to steam at a pressure of 6–7 kilograms, it should be designed as a pressure vessel. The pipe schedule represents an external pressure, and it also needs to be monitored; as for what method to use for monitoring, that is another matter.
The heat exchange tubes are under external pressure, but the tube sheet is not; the tube sheet is under a water pressure of 1 kilogram. Is X-ray inspection required for the Class B welds in the tube sheet stubs and end caps?
The tube box does not need to be designed and manufactured as a pressure vessel, nor does it require X-ray inspection; the relevant requirements for the shell side and the tube side are specified in the overall diagram.
I’m going to see how the experts avoid taking responsibility