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API-650 Addendum 3 updates (December 1996) incorporated.
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Grillage computations per API-650 Appendix I added.
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Configuration option for considering corroded shell in Appendix F computations.
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Modifications for the “Year 2000” have been incorporated.
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Two modifications were made to the shell course duplication logic. First, versions prior to 1.50 did not duplicate material properties on new shell courses added to an existing input file. This ability has been added for Version 1.50.
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The second modification allows the duplication of the corrosion allowance to the upper courses to be stopped by entering a value of zero. Previous versions treated zero as a blank, permitting the duplication of the corrosion from lower courses.
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Activating API-650 Appendix A or API-653 for thickness computations, now causes a “warning message” to be generated if the joint efficiency is left as 1.0 on the General Tank Data Spreadsheet.
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A change made in the determination of the bottom shell course thickness for use in Section E.5.3 has resulted in an increase in the actual compressive stress and a decrease in the corresponding allowable stress.