Compressed air is a vital input in the manufacturing activities across various industries as well as breathing air samples among others uses. The quality of compressed air can be compromised by particles, water, oil, and microorganisms. Based on the various categories of contaminants, there is a need to rely on the relevant compressed air testing standard to ensure the quality of the products is upheld. As a result, the testing needs, as well as best practices, will be met. Therefore, the International Standards Organisation has established three different standards to use in testing the quality of compressed air, all of which are supported by the TRI air testing company and other professional testers.
ISO8573-1:2010 Assessing Compressed Air
This is the latest edition of compressed air testing standard that mainly deals with three categories of contaminants including water, oil, and particles. The remaining two categories that are microbial and gases can be tested using ISO8573 part 7 and 6 respectively.
Based on the air purity class 1.2.1, the air quality specification requires that the resulting product contains the acceptable amounts of hydrocarbons (C6+), aerosol as well as organic solvents. For instance, 10 particles are acceptable within 1-5 micron range. The compressed air testing standard also specifies both class 2 water and class 1 oil that is allowed in the compressed air. Notably, the ISO 8573-1 test method plays a significant role in verifying the quality of compressed air based on the various purity classes. While the results using ISO8573 may be perfect, there are chances of contamination which occur due to friction in the process of fitting. This calls for the need to test the quality of compressed air at the point of use.
ISO 12500 Purification equipment
ISO 12500 is a complement of the ISO 8573 since it focuses on the purification equipment. The series comprised of four main parts. The first part involves setting a benchmark for pressure drop with reference to the performance of the filter at specific conditions. In this case, the purification equipment is accompanied by the standardized conditions to which the user can refer. The second part (ISO12500-2) is valuable in determining the capacity of the adsorption filters. To obtain a clean and dry air, the users of the purification equipment must be aware of when to replace the adsorption filters. This is the role of ISO 12500 series. The third and fourth parts (ISO12500-3 and ISO 12500-4) test Dust removal filters and water separators respectively. The filters are designed to remove different particle sizes. Moreover, they also have varying capacities to remove water from the compressed air. Therefore, the purification equipment must be tested on to gauge their efficiency in removing both particulate and water from the compressed air.
ISO 7183:2007 Dryer Parameters
This is a compressed air testing standard that focuses on the dryer parameters. The standard applies only to three categories of dryers that are Membrane, adsorption, and refrigeration. In this case, the ISO 7183:2007 reveals the effectiveness of the energy-saving devices, flow rate as well as the drop in pressure among other parameters.
The three compressed air testing standards seek to specify the requirements regarding air purity based on the various contaminants categories. Meanwhile, the application of the compressed air determines the purity class and informs the test method required.