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AutoPIPE Wiki Error Code 998 - Local Loads: Beyond curve boundaries (WRC 537 cannot be applied)
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    • -Pipe and Vessel Stress Analysis - Wiki
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            • Error Code 151 - Design Code required isn't part of your license (ASME)
            • Error Code 181 - Cone 3: should be placed between 2 shells
            • Error Code 182 - No face detail on flange with gasket on both side of the bolt circle
            • Error Code 235, 236, 237 - Floating Head (split ring): allowable stress
            • Error Code 25 - Insufficient strength in shell/channel joint
            • Error Code 27 - Tubesheet Loading condition, longitudinal membrane stress
            • Error Code 28 - Longitudinal membrane stress in the shell exceeded
            • Error Code 287 - Error in formula [40*bd] for gasket according to AD B7
            • Error Code 29 - Equivalent stress in the tubes exceeded
            • Error Code 316 - PD 5500 Figure G.2.2-18 deflections of cyl. shells due to radial loads, values beyond curve boundaries
            • Error Code 334 - Tubesheet: Design code required ins't part of your License (ASME)
            • Error Code 356 - Gasket width insufficient ( minimum=##.### mm ), the permissible gasket load is exceeded, use of a compression ring is recommended
            • Error Code 404 - Flange xx.xx seating pressure less than or equal to zero
            • Error Code 411, 412 - Nozzle AP (pad) allowable stress at temp missing, exceptional ambient allowable stress missing
            • Error Code 425 - Floating Head (split ring/splices): insufficient thickness or gap not maintained
            • Error Code 52 - WRC 107-297: Local Load Error
            • Error Code 593 - Saddle effective angle < 30Deg (blast int Max P (Corroded inertias) (Corroded Weight), revise design of vessel
            • Error Code 633 - The tube-to-Tubesheet joint strength is not adequate
            • Error Code 677 - Conical Shell (XX.XX.XX) Under Internal Pressure: U-2(g) analysis is required or provide a flare at the small junction of the conical shell (Appendix 1-5(e))
            • Error Code 77832 - Abnormal Termination message appears when starting AutoPIPE Vessel
            • Error Code 885 - Tubesheet: tubesheets gasketed with shell are not possible for a fixed tubesheets heat exchanger
            • Error Code 89 - Allowable stress at temperature missing (95C)
            • Error Code 98 - Unable to design geometrical plate layout without interference
            • Error Code 998 - Local Loads: Beyond curve boundaries (WRC 537 cannot be applied)
            • IDispatch::Invoke("LoadArx"=00000013) failed w/err 0x80020009
            • Not a valid Material Database
            • Unknown Procal Release - Release 1
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    Error Code 998 - Local Loads: Beyond curve boundaries (WRC 537 cannot be applied)

    This error notifies the user that their nozzle design is beyond the curve boundaries of the WRC standard (107 or 537) and the nozzle parameters need to be modified to fall with the scope of the standard.

    WRC has stated that if the design is outside the curve boundaries that WRC 537 is not valid for use. 

    See the demonstration below:

    Figure 1C has some extrapolated values below. When the WRC was asked what the correct value of Y, when gamma = 50 and beta = 0.45  ?

    We asked if we could use the Y value obtained using the equations and coefficients from WRC 537 which is 0.194

    We asked if we should use the last known data point for gamma = 50 which is 0.05 (which competitive software does to just to get a stress value to plot out).

    WRC's response was that we should not use either option because WRC 537 cannot be applied.

    To help get your design within the scope of WRC, you can modify the mean radius of the shell, the shell thickness, or the radius/perimeter of your attachment.

    • WRC 107
    • WRC 537
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    • Luke Andrew Created by Luke Andrew
    • When: Thu, Mar 19 2020 1:42 PM
    • Luke Andrew Last revision by Luke Andrew
    • When: Fri, Sep 4 2020 4:30 PM
    • Revisions: 6
    • Comments: 0
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