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AutoPIPE Wiki ASME BPV-III-1-NB, AutoPIPE Nuclear Piping Code FAQ
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          • 01. What piping codes are available in AutoPIPE?
          • 03. How to update AutoPIPE with a new piping code or a new Code Compliance Calculation? or Can I use a different edition of the same code and get the same results until the new Piping code has been added to AutoPIPE?
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            • -ASME BPV-III-1-NB, AutoPIPE Nuclear Piping Code FAQ
              • Q. How does AutoPIPE calculate the allowable for ASME NB, eq 10?
              • Q. If AutoPIPE is calculating elbow stress indices and two elbows are closely spaces per ASME NB-3683.2A, does AutoPIPE automatically multiply the by the product of the weld in the stress indices (per code requirements)??
              • Q. The results from ASME NB Eq 12 + Eq. 13 stresses don’t equal Eq. 10, for a specific transient pair using AutoPIPE, why?
              • Q. Class 1 NB fatigue analysis, results shows the usage of the highest alternating stress range, and not the remaining stress ranges when using AutoPIPE, why?
              • Q. Eq 13, why are the results different between different code years when using AutoPIPE?
              • Q. EQ 8 Allowable calculation does not use the manual value entered for gravity and occasional cases, why?
              • Q. Equation 10, hand calculations are 2 times AutoPIPE reported values, why?
              • Q. For calculation of ASME NB - 3653.7 Thermal Stress Ratchet, does AutoPIPE perform this check per code requirements?
              • Q. For calculation of ASME NB Bend Stiffness and Pressure stress around a bend, does AutoPIPE use the Bend / Elbow properties (O/D and t) or the preceding pipe properties (O/D and t)?
              • Q. For calculation of ASME NB-3683.7 Stress Indices does Autopipe use the Bend / Elbow properties (O/D and t) or the preceding pipe properties (O/D and t)?
              • Q. How are the bend ASME NB flexibility calculation (k) performed by AutoPIPE?
              • Q. How is the average Sm value calculated in AutoPIPE?
              • Q. When calculating ratchet allowable, is Sy the minimum from each load pair considered or the lowest Sy from the whole set of AutoPIPE load cases analysed?
              • Q. Where should Non-repeated Anchor Movement (e.g. Building Settlement) be accounted for if not in AutoPIPE's results for Equation 10a as indicated in ASME ND?
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     Questions about this article, topic, or product? Click here. 

    ASME BPV-III-1-NB, AutoPIPE Nuclear Piping Code FAQ

    Boiler & Pressure Vessel Code, Rules for Construction of
    Nuclear Power Plant Components Division 1,
    Subsection NB, Class 1 Components 

    Note: Please see the following AutoPIPE help section: 

    Help > Contents> Contents Tab> Reference Information> Code Compliance Calculations> select a piping code to see the calculations performed by AutoPIPE.

    Comments, Questions, and Answers on ASME NB Piping code in AutoPIPE

    Allowable issues

    > Does AutoPIPE automatically multiply by the product of the weld in the stress indices (per code requirements) ASME NB-3683.2A ?

    > Ratchet allowable, is Sy the minimum from each load pair considered or the lowest Sy from the whole set of load cases analysed

    > Calculate average Sm value

    > Override value not used in calculating allowable, why?

    Eq. 10 issues

    > Calculate the allowable for Eq 10

    > Results from ASME NB Eq 12 + Eq. 13 stresses don’t equal Eq. 10, for a specific transient pair

    > Eq 10, allowable hand calculations are 2 times reported values

    Eq. 10a issues

    > Non-repeated Anchor Movement (e.g. Building Settlement)

    Eq. 13 issues

    > Eq 13, different results between different code years

    Fatigue issues

    > Class 1 NB fatigue analysis, results shows the usage of the highest alternating stress range, and not the remaining stress ranges, why?

    Stress Indices & Flexibility factor issues

    > ASME NB-3683.7 Stress Indices, does AutoPIPE use the Bend / Elbow properties (O/D and t) or the preceding pipe properties (O/D and t)?

    > ASME NB Bend Stiffness and Pressure stress around a bend, does AutoPIPE use the Bend / Elbow properties (O/D and t) or the preceding pipe properties (O/D and t)?

    > ASME NB flexibility calculation (k)

    Thermal Stress Ratchet issues

    > For calculation of ASME NB - 3653.7 Thermal Stress Ratchet, does AutoPIPE perform this check per code requirements?

    See Also

    Piping Code Calculations - AutoPIPE

    Bentley AutoPIPE

    • Piping Code
    • Code Calculations
    • AutoPIPE
    • NB
    • Nuclear
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    • Mike Dattilio Created by Bentley Colleague Mike Dattilio
    • When: Wed, Dec 18 2013 2:16 AM
    • Mike Dattilio Last revision by Bentley Colleague Mike Dattilio
    • When: Tue, Apr 20 2021 8:17 AM
    • Revisions: 27
    • Comments: 0
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