GB/T 25915.1-2021 Active
GB/T 25915.1-2021 Cleanrooms and associated controlled environments—Part 1:Classification of air cleanliness by particle concentration
Abstract
This document specifies the air cleanliness grades of cleanrooms and clean areas based on the concentration of suspended particles in the air, as described in GB/T 25915.7.
This document is applicable to the monitoring of the cumulative count distribution of particles with a particle size lower limit of 0.1 μm to 5 μm and their particle concentration.
The concentration of ultrafine particles (<0.1 μm) will be specified in the air cleanliness standards for nanoscale particles. At designated sampling points, a light scattering (discrete) airborne particle counter (LSAPC) is used to determine the particle concentration of large particles (>5 μm) and quantify them using the M descriptor.
This document is not applicable to characterizing the physical, chemical, radioactive, biological, or other properties of airborne particles.
General Product Information
| Document Type | National standards |
|---|---|
| Standard Status | Active |
| Standard Code | GB/T 25915.1-2021 |
| CCS | Industrial dust and gas prevention and control technology |
| ICS | Clean rooms (sterile rooms) and related controlled environments |
| Implement Date | 2022-03-01 |