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    Mandatory Appendices: Mandatory Appendix 1 Supplementary Design Formulas

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    albejo_r9
    This document outlines mandatory appendices for supplementary design formulas for calculating thicknesses of cylindrical and spherical shells. It provides updated formulas to replace those in UG-27 for calculating shell thickness based on outside radius, internal pressure, and other factors. The formulas calculate thickness or internal pressure based on known values of the other parameter. Additional formulas are given for calculating longitudinal stress in cylindrical shells under certain thickness and pressure conditions.

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    Mandatory Appendices: Mandatory Appendix 1 Supplementary Design Formulas

    Uploaded by

    albejo_r9
    207 views2 pages
    This document outlines mandatory appendices for supplementary design formulas for calculating thicknesses of cylindrical and spherical shells. It provides updated formulas to replace those in UG-27 for calculating shell thickness based on outside radius, internal pressure, and other factors. The formulas calculate thickness or internal pressure based on known values of the other parameter. Additional formulas are given for calculating longitudinal stress in cylindrical shells under certain thickness and pressure conditions.

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    Mandatory Appendices

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    This document outlines mandatory appendices for supplementary design formulas for calculating thicknesses of cylindrical and spherical shells. It provides updated formulas to replace those in UG-27 for calculating shell thickness based on outside radius, internal pressure, and other factors. The formulas calculate thickness or internal pressure based on known values of the other parameter. Additional formulas are given for calculating longitudinal stress in cylindrical shells under certain thickness and pressure conditions.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    207 views2 pages

    Mandatory Appendices: Mandatory Appendix 1 Supplementary Design Formulas

    Uploaded by

    albejo_r9
    This document outlines mandatory appendices for supplementary design formulas for calculating thicknesses of cylindrical and spherical shells. It provides updated formulas to replace those in UG-27 for calculating shell thickness based on outside radius, internal pressure, and other factors. The formulas calculate thickness or internal pressure based on known values of the other parameter. Additional formulas are given for calculating longitudinal stress in cylindrical shells under certain thickness and pressure conditions.

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    MANDATORY APPENDICES

    MANDATORY APPENDIX 1 SUPPLEMENTARY DESIGN FORMULAS


    1-1 THICKNESS OF CYLINDRICAL AND SPHERICAL SHELLS (a) The following formulas, in terms of the outside radius, are equivalent to and may be used instead of those given in UG-27(c) and (d): (1) For cylindrical shells (circumferential stress),
    tp PRo SE + 0.4P or P p SEt Ro 0.4t (1)

    where Ro p outside radius of the shell course under consideration (2) For spherical shells,
    tp PRo 2SE + 0.8P or P p 2SEt Ro 0.8t (2)

    Other symbols are as defined in UG-27. 1-2 CYLINDRICAL SHELLS (a)(1) Circumferential Stress (Longitudinal Joints). When the thickness of the cylindrical shell under internal design pressure exceeds one-half of the inside radius, or when P exceeds 0.385SE, the following formulas shall apply. The following formulas may be used in lieu of those given in UG-27(c): When P is known and t is desired,

    _exp _ P SE_ 1_ p R _1 exp _P SE_ _ (1)


    tpR
    o

    Where t is known and P is desired,

    _R + t R _ p SE log _ R R t_ (2)
    P p SE loge
    e o

    373

    (2) Longitudinal Stress (Circumferential Joints). When the thickness of the cylindrical shell under internal design pressure exceeds one-half of the inside radius, or when P exceeds 1.25SE, the following formulas shall apply:

    When P is known and t is desired,


    t p R (Z
    1 2 1 2

    1) p Ro 1

    _Z

    Z
    12

    _ (3) _P _

    where
    Zp SE +1

    When t is known and P is desired,


    P p SE(Z 1) (4)

    where

    _R + t R_ p _R R_ p_ R R t_
    Zp
    2 o 2 o o 2

    Symbols are as defined in UG-27 and 1-1. 1-3 SPHERICAL SHELLS When the thickness of the shell of a wholly spherical vessel or of a hemispherical head under internal design pressure exceeds 0.356R, or when P exceeds 0.665SE, the following formulas shall apply. The following formulas may be used in lieu of those given in UG-27(d).

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