Verification calculation problem for heating a vacuum vessel with an external coil
Thread Content
The equipment is a vertical tank heated by external coiled tubes, which are semi-circular in shape. The design pressure inside the container is -0.1 MPa, and the design pressure inside the coil is 1 MPa; both have a design temperature of 200°C. When calculating the external pressure on the container, should it be -0.1 MPa or -1.1 MPa? Personally, I think -1.1 MPa is not feasible, as the outer coil accounts for a little over half of the surface area of the cylinder shell.
Calculations are carried out in accordance with the design requirements for semi-circular tube jacketed vessels specified in standard HG/T20582-2011; such calculations are also available in the component calculation module of the SW6 software package. The calculated pressure for the inner cylinder is still taken as 0.1; however, it is necessary to check the axial stress on the inner cylinder caused by the pressure within the half-tube.
Agree with the opinion on the 3rd floor; please refer to Part 3 of HG/T20582-201: Design of Semi-circular Tube Jacketed Containers