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AutoPIPE Wiki 18. How to design a jacketed vessel in AutoPIPE Vessel?
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            • 01. How to optimize Body flange design in AutoPIPE Vessel?
            • 02. Number of bolts required for design using AutoPIPE Vessel
            • 03. On Body flange tab, why the calculation of bolts is set by default on the dialog and then imposed by the code to calculate the section in the background thread in AutoPIPE Vessel?
            • 04. Why Corrosion Allowance on the Component Properties dialog in AutoPIPE Vessel is grayed out?
            • 05. Why is Bolting Required area = 0 in AutoPIPE Vessel report?
            • 06. In the annex you will find a file for a vessel according to ASME VIII/2 under internal and external pressure. In the design report it is stated that the opening N03.1 is not adequately reinforced for external pressure.
            • 07. There is an empty page only instead of report after a calculation in AutoPIPE Vessel output report, why?
            • 08. Gasket and Bolt Calculation, what is DL in AutoPIPE Vessel
            • 09. Why does the Packing Weight summary have a different count than shown in the model view for AutoPIPE Vessel?
            • 10. Report option "Report determining case only" in the submenu "Report " appears to not be working correctly in AutoPIPE Vessel
            • 11. When we compute a heat exchanger submitted to wind and earthquake and we select “report determining case only”, APV print lifted and erected cases whereas when we print all cases, the determining case is operating.
            • 12. When computing local loads on a cylindrical shell, the error message “122 CHECKING DATA : Data in this file are obsolete, save it with the latest release to convert data or use a previous release.” displays. What is generating this error?
            • 13. If dc = D2 was applicable to calculate λc only, can this relationship also be apply to equation 49 of GOST R 52857.3 n AutoPIPE Vessel?
            • 14. What fatigue calculations are performed in AutoPIPE Vessel?
            • 15. Can a reinforcing pad be placed on both shell locations of a vertical vessel in AutoPIPE Vessel?
            • 16. Consequence of the input of the elevation in the dialog of the bracket or ring
            • 17. How to add a skirt to a pressure vessel?
            • 18. How to design a jacketed vessel in AutoPIPE Vessel?
            • 19. How to get the nozzle orientation in a view not in a table ?
            • 20. How to model a Goose neck nozzle out the bottom of a vertical vessel in AutoPIPE Vessel?
            • 21. Saddles - Calculation of the horizontal longitudinal reactions (RaHL) When do the sliding saddles start to move?
            • 22. What would be the best recommended saddle position for a horizontal vessel in AutoPIPE Vessel?
            • 23. Can you specify different temperature zones for a vessel in AutoPIPE Vessel?
            • 24. How can one change the deflection and rotation limits on columns (top and trays) especially for optimization of column design in an AutoPIPE Vessel Model?
            • 25. How can we change reference point in AutoPipe vessel while designing pressure vessel?
            • 26. How do you specify longitudinal weld orientation in AutoPIPE Vessel?
            • 27. How to add weight of packing to the “lifting” load case in an AutoPIPE Vessel model?
            • 28. How to create custom saddles in AutoPIPE Vessel?
            • 29. How to model a standard raised face ring type joint flange in AutoPIPE Vessel?
            • 30. How to specify circular weld in AutoPIPE Vessel?
            • 31. How to add a boot to a vertical vessel in AutoPIPE Vessel?
            • 32. Can 2 rings supports be added to a AutoPIPE Vessel model?
            • 33. Why are there no trunnions characteristics for our vessel in AutoPIPE Vessel's output report
            • 34. How To insert a Boot
            • 35. How does one model supporting an inner vessel from an outer vessel in AutoPIPE Vessel?
            • 36. How AutoPipe vessel takes care of "After forming thickness" for different kind of pressure vessel "Heads"?
            • 37. Can Auto Pipe Vessel design the guide support or calculate the reaction on the guide support and corresponding stress on the shell of the tall column?
            • 38. How to add more than 04 vents in the skirt?
            • 39. How to model a skirt stiffener in AutoPIPE Vessel
            • 40. In a vertical vessel model with a skirt, the bottom ellipsoidal head needs to be changed to a conical head, but is not graphically drawn correctly in AutoPIPE Vessel, who and how to fix it?
            • 41. Connecting head directly to flange in AutoPIPE Vessel
            • 42. How can I insert a saddles with a stiffener ring in AutoPIPE Vessel?
            • 43. How to model a vertical vessel for transportation in horizontal position using AutoPIPE Vessel?
            • 44. What is the critical value of half angle at skirt apex considered by the software for GOST code?
            • 45. What is the required thickness for the longitudinal stresses at the circumferential weld (ASME VIII UG-27(c)(2))?
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    18. How to design a jacketed vessel in AutoPIPE Vessel?

    Applies To
    Product(s): AutoPIPE Vessel
    Version(s): V8i
    Environment: N/A
    Area: Modeling
    Subarea:
    Original Author: Bentley Technical Support Group

    Problem:

    How to design a jacketed vessel in AutoPIPE Vessel?

    Answer:

    Logged November 2014:

    A vertical partially jacketed vessel on legs would be modeled as shown in Figure 1:

    The jacket main shell is 1200 mm OD, length 5,000 mm and has a jacket with 1400 mm OD and length 4,000 mm and a 90 deg. jacket closure of radius 100 mm. The jacket starts at 200 mm below the lower tangent line of the main vessel. Once the jacket design is completed, several operations would be performed to demonstrate how to adjust the dimensions of the various components. The vessel is supported on 1500 mm long legs and is flanged at the top.

    Step 1.

    Select the option “Partially jacketed Vessel on Legs, topped with bolted flange”.

    Figure 2

    Enter data into the Vessel Properties field. In the Design Conditions tab (Figure 3) the Chamber 1 is for the design condition of jacket (1) and chamber 2 is for the design conditions of the main vessel which has the jacket around it (2). If an external pressure in the chamber 2 exists (4), the value of the external pressure on chamber 2 to be input must be the sum of the external pressure due to the internal pressure of the double jacket plus the external pressure of this chamber. Since the internal design pressure of jacket would be exerted on the chamber 2 as external pressure, eg. as shown in (4), there is an external pressure 0.75 MPa due to internal pressure of jacket (chamber 1) and 0.1013 MPa due to vacuum pressure hence the total external design pressure for chamber 2 = (0.75 + 0.1013) = 0.8513 MPa. Chamber 3 (3) is for the part of the main vessel which is above the jacketed portion of the shell. It is not subjected to the internal design conditions of chamber 1 as external pressure since it is not covered by the jacket. This part (chamber 3 - which is not jacketed) is created in AutoPIPE Vessel to distinguish it from the part of the vessel (chamber 2 – jacketed portion) that is subjected to the external pressure equal to the internal pressure in chamber 1 (jacket).

     

    Figure 3

    Step 2.

    In the Geometry field (Figure 4) enter the following values:

    Figure 4

    • Main Vessel > External = 1400 mm, this is the OD of the jacket
    • Main Vessel > Distance between tangent lines = 4000 mm, this is the height of the jacket
    • Internal Chamber >     Diameter = 1200 mm, this is the OD of the main vessel
    • Internal Chamber > Length=5000 mm, this is the height of the main vessel
    • Location = 200mm, this is the distance below the bottom tangent line of the main vessel where the jacket bottom tangent line is located (this can be adjusted later)

    Step 3.

    After completing the vessel properties dialog box, the model is ready for further design

    Figure 5

    Step 4.

    Double click on the Sealer Jacket Closure from the Component List (Figure 6):

    Figure 6

    Observe that the Radius has a calculated value of 100 mm which is because the OD of the jacket and vessel are 1400 mm and 1200 mm respectively. Apex angle is 90 degree, which can be changed when needed. Click OK. This completes the jacket vessel model. Save and run the file to perform the calculations.

    Figure 7

     NOTE - Open the Vessel Properties dialog box and open the Geometry tab (Figure 8), observe that the Location field is active and the value has changed from 200 to -3800 mm.

    Figure 8

    This value (200-4000 = -3800 mm) indicate the location of the main vessel bottom tangent line from the top end of the jacket (negative because it is at a lower elevation than the jacket top).

    Figure 9

    Change this value to -2500 mm. Observe that the main vessel (Figure 10) is now elevated since the distance between the top end of the jacket (whose elevation is fixed) and the lower tangent line of the main vessel is reduced to 2500 mm. 

    Figure 10

    Figure 11

     

    However, now the chamber 3 (above Ref[3] line) has to be adjusted to cover the entire section of the vessel which is above the jacket (since chamber 3 denotes only the part of the main vessel which is not wrapped by the jacket). Double click on the shell for chamber 2 and reduce its length by (3800 - 2500) = 1300 mm, hence enter a value of (4000 – 1300) = 2700 mm for tag 31.07 (Figure 11).

    Figure 12

    Observe that the chamber 3 (above Ref [3] line) is now aligned with the level of the jacket top junction to the main shell (Figure 12).

    There is another way to adjust the distance between the bottom tangent line of the chamber 2 of the main vessel and the jacket upper tangent.

    Double click on the shell tag 31.06 which has P=0 (Figure 13). Observe that it is a non-pressure bearing component (Figure 14):

    Figure 13

    Figure 14

    This shell (31.06) is a dummy component whose main function is to separate the chamber 2 from chamber 1. It is NOT used for pressure calculations. There is one more function of this shell (31.06). It acts as a transition piece to connect the shell tag 31.05 of chamber 1 to the shell tag 31.07 of chamber 2. The lower tangent line of chamber 2 ie. the shell 31.07 starts at an elevation of 2500 below the top elevation of shell tag 31.05. Hence the length of 31.06 is -2500 mm (Figure 14). AutoPIPE Vessel automatically creates a non-pressure bearing dummy shell (31.06) when multiple chambers are created. Notice that the shell length -2500 mm is same as the Location field in Geometry tab.

    Figure 15

    In the length field under shell tag 31.06, change the value from -2500 to -1500. Notice now that the distance between the bottom tangent line of chamber 2 and the top junction of jacket to shell is reduced to 1500 mm.

    Figure 16

    There is another non-pressure bearing dummy shell (Tag 31.08) which separates the chamber 2 and chamber 3.

    Figure 17

    Double click and observe that the length is almost ‘0’ (0.01 mm) since it is a dummy shell. You may change this value to ‘0’. Since this is a non-pressure bearing part, it is not calculated as stated above (similar to shell tag 31.06 dummy shell). 

    Figure 18

    See Also

    Bentley AutoPIPE

    External Links

    Bentley Technical Support KnowledgeBase

    Bentley LEARN Server

    Comments or Corrections?

    Bentley's Technical Support Group requests that you please submit any comments you have on this Wiki article to
    the "Comments" area below. THANK YOU!

    • AutoPIPE Vessel
    • Jacketed
    • Pressure Vessel
    • Modeling
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    • Mike Dattilio Created by Bentley Colleague Mike Dattilio
    • When: Fri, Nov 7 2014 7:33 AM
    • JamieP Last revision by Bentley Colleague JamieP
    • When: Wed, Aug 19 2020 4:43 PM
    • Revisions: 8
    • Comments: 0
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