Standard No.:	GB/T 6165-2021
English Name:	Test method of the performance of high efficiency particulate air filter—Efficiency and resistance
Chinese Name:	高效空气过滤器性能试验方法 效率和阻力
Chinese Classification:	Q76    Building heating and ventilation and air conditioning instrument and equipment
Professional Classification:	GB    National Standard
ICS Classification:	91.140.30 91.140.30    Ventilation and air-conditioning systems 91.140.30
Issued by:	AQSIQ and SAMR
Issued on:	2021-04-30
Implemented on:	2021-11-1
Status:	valid
Superseding:	GB/T 6165-2008 Test methed of the performance of high efficiency particulate air filter - Efficiency and risistance
Language:	English
File Format:	PDF
Word Count:	25000 words
Price(USD):	750.0
Delivery:	via email in 1 business day

1 Scope This standard specifies the terms and definitions, symbols and abbreviations of HEPA and ULPA filter mediums and filter efficiency and resistance test, the selection of test methods, the performance test methods of HEPA and ULPA, and the performance test methods of HEPA and ULPA filter mediums. This standard is applicable to the test of HEPA and ULPA filter mediums used to filter aerosols and the efficiency and resistance of filters, and may serve as a reference for the efficiency and resistance test of HEPA and ULPA filter mediums and filters. 2 Normative references The following documents are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 1236 Industrial fans—Performance testing using standardized airways GB/T 2624.2 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full—Part 2: Orifice plates GB/T 2624.3 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full—Part 3: Nozzles and Venturi nozzles GB 11120 Lubricating oils for turbines GB/T 12564 Generic specification for photomultiplier tubes GB/T 13554 High efficiency particulate air filter GB/T 14295 Air filter GB 50243 Code of acceptance for construction quality of ventilation and air conditioning works JJF 1190 Calibration specification for airborne particle counter JJG 172 Tilting tube micromanometers JJG 875 Digital pressure gauges 3 Terms, definitions and abbreviations 3.1 Terms and definitions For the purposes of this standard, the terms and definitions given in GB/T 13554 and the following apply. 3.1.1 penetration ratio of the aerosol concentration after filtration of the filter element to the aerosol concentration before filtration when the filter element is tested 3.1.2 efficiency ratio of the amount of aerosol filtered by the filter element to the amount of aerosol before filtration when the filter element is tested 3.1.3 rated air flowrate technical parameter identifying the working capacity of a filter, indicating the maximum air volume flow per unit time to ensure the efficiency of the filter Note: It is provided by filter manufacturer. 3.1.4 resistance static pressure difference before and after the filter element under certain test wind speed or air flowrate. For the filter, it is the static pressure difference before and after the filter under rated air flowrate 3.1.5 filter medium unfolded flat filter material for filtering aerosols 3.1.6 high efficiency particulate air filter; HEPA air filter used for air filtration and tested by the counting method specified in this standard, and the filtration efficiency without static elimination treatment and after static elimination treatment under rated air flowrate is not less than 99.95% 3.1.7 ultra low penetration air filter; ULPA air filter used for air filtration and tested by the counting method specified in this standard, and the filtration efficiency without static elimination treatment and after static elimination treatment under rated air flowrate is not less than 99.999% 3.1.8 HEPA filter medium filter medium for making high efficiency particulate air filter 3.1.9 ULPA filter medium filter medium for making ultra low penetration air filter 3.1.10 aerosol generator device for generating standard aerosol for test 3.1.11 particle number concentration number of particles in the measured particle size range per unit volume of gas (air) 3.1.12 particle size nominal diameter of a particle measured by some measurement method (optical or aerodynamic equivalent test) 3.1.13 particle size efficiency filtration efficiency of a filter element for particles of a certain particle size 3.1.14 most penetrating particle size; MPPS particle size corresponding to the lowest point of the sizing efficiency curve of the tested filter element when the test is carried out according to the counting method specified in this standard 3.1.15 minimum filter efficiency filtration efficiency of the tested filter element for the most penetrating particle size under given operating conditions, generally known as MPPS efficiency 3.1.16 median particle diameter corresponding particle size value when the cumulative distribution of aerosol particle size accounts for 50% of the total amount, which is generally expressed by count median particle diameter and mass median particle diameter 3.1.17 sampling flow rate volume flow rate of air sampled by the measuring element of the test instrument when measuring the particle concentration upstream or downstream of the filter element 3.1.18 sampling duration effective time of air sampling upstream or downstream of the tested high efficiency particulate air filter element at the sampling volume flow rate 3.1.19 coincide error error caused by the presence of multiple particles in the scattering cavity of a particle counter at a given time Note: The coincide error will lead to low count concentration and high average particle size in the measurement results. 3.1.20 monodisperse aerosol aerosol with a geometric standard deviation of particle size is less than 1.15 (σg < 1.15) when described by distribution equation 3.1.21 quasi-monodisperse aerosol aerosol with a geometric standard deviation of particle size is not less than 1.15 and not greater than 1.50 (1.15 ≤ σg ≤ 1.50) when described by distribution equation 3.1.22 polydisperse aerosol aerosol with a geometric standard deviation of particle size is greater than 1.50 (σg>1.50) when described by distribution equation 3.1.23 sodium flame method method for calculating the mass efficiency of filter elements by testing the mass concentration upstream and downstream of filter elements with sodium flame photometer in case of polydispersed NaCl aerosol. For filter medium and filter tests, the counting peak diameter of test aerosol particles is (0.09 ± 0.02) μm, and the geometric standard deviation of counting shall not be greater than 1.90 3.1.24 oil mist method method for calculating the mass efficiency of the filter element by testing the mass concentration upstream and downstream of the filter element with an oil mist meter in case of polydispersed liquid aerosols with an average mass diameter of 0.28 μm to 0.34 μm 3.1.25 particle counting method with quasi-monodisperse aerosol method for calculating the counting efficiency of the filter medium by testing the counting concentration upstream and downstream of the filter medium with condensation particle counter (CPC) or optical particle counter (OPC) in case of quasi-monodisperse aerosols (such as solid particle NaCl or liquid particle DEHS, etc.) with counting median diameter of particles of 0.10 μm to 0.30 μm and the geometric standard deviation of not greater than 1.50 3.1.26 particle counting method with monodisperse aerosol method for calculating the counting efficiency of filter elements by testing the counting concentration upstream and downstream of filter elements with condensation particle counter (CPC) in case of monodisperse aerosol. Monodisperse aerosol can be generated by several methods, such as differential mobility analyser (DMA), diffusion battery, evaporation and condensation method, polystyrene latex spheres (PSL), etc. 3.1.27 particle counting method with polydisperse aerosol method for calculating the counting efficiency of filter elements by testing the counting concentration upstream and downstream of filter elements with optical particle counter (OPC) in case of polydisperse aerosol 3.1.28 correlation ratio ratio of particle concentrations in upstream and downstream sampling systems when the test system is not equipped with a tested filter and keeps a stable aerosol concentration Note: When an optical particle counter (OPC) is used in the test system to test the aerosol concentration in the upstream and downstream of the tested filter in sequence, the correlation ratio indicates the difference between the upstream and downstream sampling systems due to the particle loss in the upstream and downstream sampling pipelines, the dilution ratio of the diluent (if the upstream sampling adopts the diluent) and the difference between the upstream and downstream sampling duration; when two optical particle counters (OPC) are used respectively in the test system to test the upstream and downstream aerosol concentration of the tested filter, the correlation ratio indicates the difference caused by the different sampling flow rate and counting efficiency of the upstream and downstream sampling counters. 3.2 Abbreviations For the purposes of this document, the following abbreviations apply. CPC: Condensation particle counter DEHS: [sebacic acid-bis (2-ethyl-) ester (commonly known as di-ethyl-hexyl-sebacate)] DMA: Differential mobility analyser MPPS: Most penetrating particle size OPC: Optical particle counter PAO: Poly alpha olefin PSL: Polystyrene latex spheres HEPA: High efficiency particulate air filter ULPA: Ultra low penetration air filter

Foreword i 1 Scope 2 Normative references 3 Terms, definitions and abbreviations 4 Selection of test methods 5 Performance device and test method of HEPA and ULPA 6 Performance test method of HEPA and ULPA filter mediums Annex A (Normative) Structure and maintenance of filter performance test device by sodium flame method Annex B (Informative) Structure diagram of components of filter and filter medium test devices by sodium flame method Annex C (Normative) Structure and maintenance of filter test device by oil mist method Annex D (Normative) Correction, calibration and maintenance of filter medium test device by oil mist method Annex E (Normative) Vaporization-condensation oil mist generator in filter test device by oil mist method Annex F (Normative) Oil mist meter Annex G (Normative) Structure and maintenance of filter medium test device by sodium flame method Annex H (Normative) Oil mist generator in the filter medium test device