GB/T 21782.4-2008 Replaced National standards

GB/T 21782.4-2008 Coating powders—Part 4:Calculation of lower explosion limit

Publish Date: 2008-05-12 Implement Date: 2008-09-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/T 21782.4-2008

Standard Type: National standards

Standard Status: Replaced

is_force_gb: no

CCS Name: Logo, packaging, transportation, storage

ICS Name: \nProtection against dangerous goods

Publish Date: 2008-05-12

Implement Date: 2008-09-01

Pages: 8 pages

Scope

This part of GB/T 21782 specifies a method for calculating the lower explosive limit of powder coatings, that is, the minimum concentration of powder coating dust in the air that can form an explosive mixture. When calculating, it is necessary to base on the total heat value of the product measured by ISO 1928:1995, or on the total heat value of each component of the product. In order to obtain reliable measurement data, a specialized instrument is needed to determine the explosion index of combustible dust in the air, which is described in ISO 6184-1:1985. However, such instruments are not easily available, and the method is very complex, requiring not only professional knowledge but also considerable costs. Experience shows that the lower explosive limit obtained by this calculation method is still satisfactory when applied in coating workplaces.