How to determine whether a heat exchanger is a pressure vessel?
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Such a heat exchanger: Tube side (tube bank): Medium: Natural gas； Maximum operating pressure: 0.8 MPa ； Tube size (φ25*2.5). Shell side: Medium: Water ； Working pressure: Atmospheric pressure. Is it considered a pressure vessel? Is supervision required?
bk15.jpg Incomplete conditions； Classify according to the highest and most stringent requirements that arise.
It has no volume, but based on the medium and pressure within the pipe system, it can be classified as a pressure vessel and requires supervision and inspection
It’s a conceptual question: with a pressure of 0.8 MPa, it definitely qualifies as a pressure vessel. As for whether it is subject to regulatory oversight, if the volume of the pipe side is 30 L and the inner diameter is 150 mm or more, then it is subject to such regulations
Should the volume of the tube bank include the total volume of all tubes? The inner diameter of a single cylinder’s volume certainly does not reach 150 mm.
It is recommended to add that designers also need to protect themselves.
Of course it needs to be calculated. Volume refers to the total volume of the tube side (the volume of both tube banks plus the volume inside all the heat exchange tubes)
The volume of the pipe train is not specified, so it cannot be determined. If the tube side volume is 30 L or more and the inner diameter of the tube box is greater than 150 mm, then the tube side chamber falls under the jurisdiction of the Solid Content Regulations.