Explosivity gas & vapor general

To investigate the Explosivity of gasses and vapors, international standards and procedures have been defined. The test equipment is very expensive and the people occupied with this investigation are specialists. This is the reason that this kind of investigation is performed at larger laboratories or research institutes. The listing below is a reduced content of the PTB website, which however indicates the relevant standard.

In the Netherlands and Belgium regularly reference is made to a Dutch practical guideline named the NPR 7910 part 1 since this guideline is informing how the EN60097-10 has to be interpreted in practice.

Test results of these investigations serve to enable Ex-zonification and classification in order to define the appropriate requirements for equipment to be used such areas.

Explosivity investigation gas & vapor

The investigations mentioned below are applicable on the investigations regarding the Explosivity of gasses and vapors.

  • Flashpoint determination according to DIN 51755 part 1, EN/ISO 2719, EN/ISO 13736, EN/ISO 2592 or EN/ISO 3679.
  • Determination of the lower / upper explosion limit according to EN 1839 at 1 temperature /3 temperatures.
  • Determination of the limiting oxygen concentration according to EN 14756.
  • Determination of the lower / upper explosion point according to EN 15794.
  • Determination of the maximum explosion pressure according to EN 13673 part 1.
  • Determination of the pressure increase speed according to EN 13673 part 2.
  • R-Factor.
  • Determination of the ignition temperature according to EN 14522, DIN 51794.
  • Determination of fire spreading rate according to  EN/ISO 9038