Designing Pressure Vessel for Deflagration

[dalea60]

Have a pressure vessel to be designed per ASME Section VIII Divison 1 along with explosion containment. I see Nonmandatory Appendix H Guidance to Accommodate Loadings produced by Deflagration and it's reference to NFPA 69 chapter 5. Looks like NFPA 69 2008 Edition would be chapter 13. Appears the reference in Appendix H is out dated. Looking for info from someone with experience with similar design about how to apply Appendix H to the code calc's.

Looks like a MAWP is determined from NFPA 69 and then the code calc would have to say the design had a MAWP equal to or greater than the value from NFPA 69.

Thanks,
Dale

 

[davefitz]

Not sure if it applies to your situation, but older NFPA guidelines specify the design pressure should exceed 50 psig if the vessel is to avoid fragmentation during a "puff" ( trade acronym for a fuel-air explosion)

"Whom the gods would destroy, they first make mad "