Duct venting of gas explosions: Revision of two proposed engineering correlations

Risto Lautkaski

Research output: Contribution to journalArticleScientificpeer-review

10 Citations (Scopus)


A part of the comparison of methods for vent dimensioning of gas explosions by Razus and Krause (2001) has been revised. The semi-empirical methods by Bradley and Mitcheson, 1978a, Bradley and Mitcheson, 1978b and Molkov, Dobashi, Suzuki, and Hirano (1999) were equally accurate for tests with covered vent. Empirical correlations for duct vented gas and dust explosions were combined with the Molkov method to predict explosion overpressures measured in tests of duct vented gas explosions. Since 29 of the 65 tests were made with town gas–air mixtures, the values of burning velocity and expansion factor of such mixtures have been estimated. The correlations by Bartknecht (1993) and Siwek (1998) had comparable accuracies. The methods for duct vented dust explosions by Tamanini and Fischer (2003) and Ural (2005) were less accurate. Two new engineering correlations by Di Benedetto et al., 2007, Di Benedetto et al., 2008 were found flawed. The parameters of the earlier correlation were fitted to test data. The later correlation was complemented with a term containing vent opening pressure. The revised correlations provided predictions comparable to those made with the methods by Bartknecht (1993) and Siwek (1998).

Original languageEnglish
Pages (from-to)400-413
JournalJournal of Loss Prevention in the Process Industries
Issue number2
Publication statusPublished - 2012
MoE publication typeA1 Journal article-refereed


  • Dust explosion
  • empirical methods
  • gas explosion
  • town gas
  • vent dimensioning
  • vent duct


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