regarding WRC 107

[samkor]

Dear All,
while doing WRC107 for Nozzle, after running the programme i found warning - the ration of R0/Rm 0.5960, must be > 0.0571 and < 0.571.
so, i would like to know what is R0/Rm.

 

[prex]

r₀ should be lowercase and is the outside radius of the attachment; R_m, if uppercase, is the mean radius of the shell. That limitation should be derived from a figure of the publication, that sets limits on the ratii D_m/T and d_m/D_m. It is not explicitly shown as per your error message though.

prex

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[LSThill]

Also

PRECISION EQUATIONS AND ENHANCED DIAGRAMS FOR LOCAL STRESSES IN SPHERICAL AND CYLINDRICAL SHELLS DUE TO EXTERNAL LOADINGS FOR IMPLEMENTATION OF WRC BULLETIN 107
D. A. Osage, M. Straub, M. E. Buchheim, D. E. Amos, T. N. Chiasson, D. A. Samodell
WRC Bulletin 537
Purchase This
Precision Equations and Enhanced Diagrams For Local Stresses In Spherical and Cylindrical Shells Due To External Loadings For Implementation of WRC Bulletin 107

Bulletin 537 is intended to facilitate implementation of the widely required and used relations found in the March 1979 Revision of WRC 107 for local stresses in spherical and cylindrical shells due to external loadings. The original analytical and experimental work of WRC’s Pressure Vessel Research Council delivered has become the an essential tool for pressure vessel design for 45 years and in its present form for over 30 years. In response to numerous requests over the years for the precise equations depicted in the figures in the 1979 version of WRC 107, WRC 537 has been prepared. The objective was to eliminate potential errors in implementation, facilitate proper interpolation and extrapolation and permit efficient computation with modern computers.
WRC will no longer deliver WRC 107 when requested for purchase. WRC 537 provides exactly the same content in a more useful and clear format. It is not an update or a revision of 107. It is the 2010 printing of WRC 107. It has been meticulously checked. Those responsible for codes, standards and specifications that require use of WRC 107 should amend those documents to reflect the fact that WRC 537 is equivalent WRC 107 and provides the same acceptable basis for design.
ISBN 1-58145-544-5, 188 pages, December 2010
Last Update: Fri, 1/14/2011 07:25:28 PM