This standard specifies the self-priming filtering anti-particulate respirator classification and marking, technical requirements, testing methods and marking.
This standard applies to the protection of particulate matter self-priming filter respirator.
This standard does not apply to the protection of harmful gases and vapors respirator, does not apply to oxygen-deficient environments, underwater operations, escape and firefighting respirator.
This standard and GB2626-2006 compared to the main changes are as follows:
Standard name from the "respiratory protection products self-priming filtering anti-particulate respirator" adjusted to "respiratory protection self-priming filtering anti-particulate respirator";
Penetration rate "" wear airtightness inspection "Designated Protection Factor" "Counting"
Deleted the terms "smoke," "fog," and "microorganisms". "Median diameter" "Median mass diameter" "Aerodynamic particle size" and "Aerodynamic mass median diameter". "seven terms (see 3.14 and 3.19~3.24)
Modified the requirements for inspiratory resistance and expiratory resistance for various types of respirators (see 5.5);
Modified the requirements and test methods for exhalation valve airtightness (see 56.1 and 6.7);
Adjusted the designation of the exhalation valve cover to an exhalation valve protection device ( see 5.6.2 and 6.8);
Revised the field of view requirements for all types of respirators (see 5.8)
Added requirements and test methods for products in which the manufacturer claims that the filter element can be cleaned and/or sterilized for reuse [see 5,14.15,16d) and 6.23]
Added requirements and test methods for practical performance (see 5.15 and 6.16);
In the section on information to be provided by the manufacturer, a description of the method for judging the service life of the filter element has been added, and application limitations have been added for non-flame-retardant products (see 5,16);
In the section on the method for testing the efficiency of filtration, methods of converting the particle size of particles used for the testing of the efficiency of filtration have been added (see Appendix B), and requirements on the accuracy and resolution of the particles of filtration efficiency testing equipment have been added (see 5,14,15,16d) and 6.23]. detector accuracy and resolution requirements (see 63.2) and judgment methods for loading endpoints (see 63,4.46.3.4.5, 6.3.4.6, and Appendix C), and requirements for loading volume have been added (see 6.3.3);
Requirements for sample inspection have been added in the section on leakage testing methods (see 6.4.1.4), and requirements for particulate matter detector accuracy have been added ( see 64.2.4), added the formula for calculating the leakage rate by subject [see Eq. (5)];
added a schematic diagram of the construction of the breathing tube built into the test head mold used for the breathing resistance test and the dead space test (see FIG. 4);
in the method for the testing of respiratory resistance, revised the requirements for the parameters of the micropressure gauge (see 6.5.2,3), and added a requirement that the respirator facepiece and the test head mold (see 6.5.4 and 6.6.4), and added the requirement that the respirator mask and the test head mold should be airtight (see 6.5.4 and 6.6.4);