There are vessels that could be subjected to rapidly rising pressure load during deflagration events. The dynamic load factor (DLF) which accounts for dynamic load effects in such events can be used to bridge the gap between transient and static pressure loads. This paper addresses the issues in estimating the DLF for a deflagration event. A unified methodology for estimating the DLF is first presented. The methodology is then validated with existing references. Key parameters determining DLFs are identified during the validation. Case studies are used to illustrate how to use the methodology. Finally, this paper is concluded with the findings and a suggested procedure for estimating DLFs in deflagration events.

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