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AutoPIPE Wiki 16. Where to input extra cladding thickness on tubesheets in AutoPIPE Vessel?
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            • 15. Use TEMA Metric Bolt Root Area (TEMA Table D-5M) from section 9 in an AutoPIPE Vessel model.
            • 16. Where to input extra cladding thickness on tubesheets in AutoPIPE Vessel?
            • 17. How to Change the the corrosion allowance for clad bottom plate on a heart exchanger model in AutoPIPE Vessel?
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            • 33. How is shell length for heat exchanger determined in AutoPIPE Vessel?
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            • 35. How AutoPIPE Vessel calculates the shell length at the time of Heat Exchanger Design ?
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            • 37. Is the corrosion allowance taken into account for the tubes in an ASME design?
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            • 41. Why effective diameter formula is different in operating and hydrotest condition (tube side) compared to hydrotest condition shell side?
            • 42. Tube Bundle report is not aligned with bundle layout
            • 43. Axial tube stress and Tube to tubesheet joint check for U-tube tubesheet in AutoPIPE Vessel
            • 43. In latest software version, Why it is not calculating the Axial stress and Allowable Loads for Tube-To-Tubesheet Joints?
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    16. Where to input extra cladding thickness on tubesheets in AutoPIPE Vessel?

    Applies To
    Product(s): AutoPIPE Vessel
    Version(s): V8i 
    Environment: N/A
    Area: Modeling
    Original Author: Bentley Technical Support Group
    Date Logged
    & Current Version
    Oct. 2016
    40.02.00.08

    Problem:

    Where to input extra cladding thickness  on tubesheets?

    Example:

    input 3.2 mm of cladding on shell and tubes side. But we want to increase cladding on tubesheet until 9.5 in shell side and 8 on tube side. How can I do this? Should I input those values in corrosion field? (if I do that hfl is bigger than hp on floating tubesheet).

    Solution:

    The clad can be taken into account as a corrosion allowance, but this is just a workaround (there is an enhancement in the backlog: TFS#72825).

    hfl is bigger than hp in the model because the corrosion (tube side) is not applied on hfl (thickness of the flanged extension), see below the detail of the calculation:
    thickness of the flanged extension : hfl
    thickness at the periphery : hp
    thickness of the tubesheet: hnew = 329 mm
    Corrosion Shell Side: CAss = 9.5 mm
    Corrosion Tube Side: CAts = 8 mm
    Extra thickness (machining extension): hg = 8 mm
    Extra thickness (recessed face): hf = 5 mm
    hfl = hnew - hg - hf - CAss = 329 -8-5-9.5 = 306.5 mm
    hp = hnew - hg - CAts - CAss = 329 -8-8-9.5 = 303.5 mm

    See Also

    Modeling techniques

    Bentley AutoPIPE

    Bentley LEARN Server

    • AutoPIPE Vessel
    • Tubesheets
    • cladding
    • Modeling
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    • History
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    • Mike Dattilio Created by Bentley Colleague Mike Dattilio
    • When: Thu, Dec 15 2016 1:09 PM
    • JamieP Last revision by Bentley Colleague JamieP
    • When: Mon, Aug 24 2020 12:12 PM
    • Revisions: 2
    • Comments: 0
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