Quality assurance for the tests to determine explosive parameters of the combustible dust-air mixtures

Abstract

For any type of combustible dust, several important explosive parameters must be taken into account when designing and using protection systems: namely the ease with which dust clouds ignite and their burning rate, maximum explosion pressure, maximum pressure rise speed. of explosion. The accuracy of the results obtained necessary for the design and use of protection systems depends on a number of factors but also on the accuracy of the application of the test method (s) by the personnel involved. Test quality assurance is a requirement of EN ISO / IEC 17025 for the accreditation of testing laboratories. The standard requires laboratories to have a procedure in place to monitor the validity of test results, which involves participation in interlaboratory comparisons. This paper presents some specific issues highlighted during the successful participation of INSEMEX-GLI in several rounds of interlaboratory comparisons for the tests to determine explosive parameters of the combustible dust-air mixtures.

Quality assurance for the tests to determine explosive parameters of the combustible dust-air mixtures

“…The results of the laboratory within INSEMEX GLI are highlighted in yellow (number 35). Results obtained by INSEMEX GLI in 2021 [9] (67 laboratories participated, 59 laboratories with a 20l test vessel and 8 laboratories with a 1m3 test vessel) CaRo21-for determination of the explosion characteristics of dusts are presented in the figure 8. The results of the inter-laboratory tests CaRo21 for Pmax are presented in figure 9 and for K max in figure 10.…”