T/CRAAS 438.1-2020 Test method for performance of air purification materials and devices for general ventilation pollutants in gaseous form - Part 1: Air purification materials (GPACM) for air purification materials

Scope

Main technical content: T/CRAA 438.1-2020. This part targets three types of solid gaseous pollutant purification materials (GPACM) or structural forms in gaseous pollutant purification devices for general ventilation. The standard provides an objective laboratory test method, recommends devices, standard test benches, and standard tests. The standard specifies loading tests rather than general performance evaluations of materials or pores. The three types of materials covered by the standard include: GPACM-LF (particles of different shapes and sizes used for filling), GPACM-FL (sheet-like fabrics used to make single-layer, folded, and bag-type devices), and GPACM-TS (three-dimensional structural elements with a depth far greater than the thickness of the sheet material, such as finished elements in the device). The materials are placed in airflow and subjected to stable loading of test gases. Due to the high loading concentration (compared to general ventilation applications), the test data are only used to compare materials of the same structure and cannot be used to predict performance in actual use. Moreover, the original intention of this standard is to compare materials of the same structure and not to directly compare materials of different structures. ISO 10121-2 describes the testing of complete devices. This standard has no preference for suppliers of testing equipment and does not provide specific designs for testing equipment. Examples are provided in Appendix C (informative). This standard does not specify the specific structure of the sample clamp, but only stipulates the performance of the testing device and the validation test.

Development Information

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