Alternative (non-traditional) flange assembly procedures offer the potential for reduced assembly time and physical effort in many industrial applications. While standards and procedures exist for the traditional, star pattern assembly procedure, there is currently only limited guidance for the selection and use of alternative assembly procedures. This paper summarizes the approach taken by the authors in determining potential assembly procedures, and the ultimate analysis and qualification undertaken to validate their use on a General Purpose Tank Car Hinged/Bolted Manway Connection. This case history study can serve as a guide to others in industry for selecting and qualifying alternative assembly procedures for their flanged equipment.

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