By excitation of the IEC and within the scope of international comparison test series, the Physikalisch-Technische Bundesanstalt (PTB) determined the the characteristic values for safety against explosion hazard--maximum experimental safe gap (M.E.S.G.) and minimum igniting current (M.I.C.)--for 20 explosible gases and vapours in mixture with air by means of German test apparatus. Two functions are discussed. They record the correlation between these characteristic values rather correctly. Further values of the minimum capacitive ignition energy known from literature which are among others important for the specification of ignition hazard by electrostatic supercharge are discussed. The comparison of these values with the minimum inductive ignition energy, calculated from test results, leads to a linear correlation function. This is a way for collective grouping of all substances with respect to the three values: maximum experimental safe gap, minimum igniting current and minimum capacitive ignition energy. In spite of this statement it would not be allowed to calculate the residual characteristic values only from one test value, because the subsequence of substances in some cases is not the same by order functions and test results. The necessity is accentuated to come to an international standard test apparatus for testing minimum igniting current.

  • Corporate Authors:

    Pergamon Press, Incorporated

    Maxwell House, Fairview Park
    Elmsford, NY  United States  10523
  • Authors:
    • Helwig, N
    • Nabert, K
  • Publication Date: 1968-8


  • German

Media Info

  • Features: References;
  • Pagination: p. 287-293
  • Serial:
    • PTB Mitteillungen
    • Volume: 68
    • Issue Number: 4
    • Publisher: Pergamon Press, Incorporated

Subject/Index Terms

Filing Info

  • Accession Number: 00046138
  • Record Type: Publication
  • Source Agency: Environmental Science Services Administration
  • Files: TRIS
  • Created Date: Sep 18 1973 12:00AM