ISO 8130-4:1992 PDF

Scope: This part of GB/T 21782 stipulates a calculation method for the lower explosion limit of powder coatings, that is, the lowest concentration of powder coating dust that can form an explosive mixture in the air. When calculating, it needs to be based on the total calorific value of the product measured in ISO 1928:1995, or based on the total calorific value of each component of the product. In order to obtain reliable measurement data, a special instrument is needed to measure the explosion index of combustible powders in the air. This method is described in ISO 6184-1;1985. However, this kind of instrument is not easy to obtain, and the method is very complicated, which not only requires professional knowledge, but also costs a lot. Experience shows that the lower explosion limit obtained by this calculation method is satisfactory when applied in coating workplaces. Note 2: If the PVC-based non-combustible powder coating is used, this method can still obtain a lower explosion limit in air. Therefore, any underestimation of explosion hazards can be effectively avoided. Note 2: The calculation method used in this section is based on the following assumptions: a) The material should be a molecular dispersion; b) It should be a material that can burn completely and reach the highest oxidation state; c) The reaction should be adiabatic. ; d) When reaching the lowest explosive concentration in air, the fuel temperature of the component is 1 000°C

ISO 8130-4:1992 history

2021 ISO 8130-4:2021 Coating powders — Part 4: Calculation of lower explosion limit
1993 ISO 8130-4:1992/cor 1:1993 Coating powders; part 4: calculation of lower explosion limit; Technical Corrigendum 1
1992 ISO 8130-4:1992 Coating powders; part 4: calculation of lower explosion limit