GB 2626-2019 PDF English
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| GB 2626-2019 | English | 265 |
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Respiratory protection - Non-powered air-purifying particle respirator
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| GB 2626-2006 | English | 115 |
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[Replaced by GB 2626-2019] Respiratory protective equipment -- Non-powered air-purifying particle respirator
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| GB/T 2626-1992 | English | 359 |
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General technical requirements for self-inhalation filtertype dust respirator
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GB 2626-2019: Respiratory protection - Non-powered air-purifying particle respirator---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB2626-2019
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 13.340.30
C 73
Replacing GB 2626-2006
Respiratory protection - Non-powered air-purifying
particle respirator
Issued on: DECEMBER 31, 2019
Implemented on: JULY 01, 2020
Issued by. State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword... 4
1 Scope... 6
2 Normative references... 6
3 Terms and definitions... 7
4 Classification and marking... 11
4.1 Classification of facepiece... 11
4.2 Classification of filter element... 11
4.3 Grades of filter element... 12
4.4 Marking... 12
5 Technical requirements... 12
5.1 Basic requirements... 12
5.2 Visual inspection... 13
5.3 Filter efficiency... 14
5.4 Leakage... 14
5.5 Breathing resistance... 15
5.6 Exhalation valve... 15
5.7 Dead space... 16
5.8 View field... 16
5.9 Head harness... 16
5.10 Connections and connecting parts... 17
5.11 Lens... 17
5.12 Air tightness... 17
5.13 Flammability... 17
5.14 Cleaning and disinfection... 18
5.15 Practical performance... 18
5.16 Information to be provided by the manufacturer... 18
5.17 Packaging... 20
6 Testing methods... 20
6.1 Visual inspection... 20
Respiratory protection - Non-powered air-purifying
particle respirator
1 Scope
This standard specifies the classification and marking, technical requirements,
testing methods, identification of non-powered air-purifying particle respirator.
This standard applies to non-powered air-purifying respirator that protects
against particle.
This standard does not apply to respirators that protect against harmful gases
and vapors. It does not apply to the respirators for hypoxic environments,
underwater operations, escape, fire-fighting.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) are applicable to this standard.
GB 2890-2009 Respiratory protection - Non-powered air-purifying
respirators
GB/T 5703 Basic human body measurements for technological design
GB/T 10586 Specifications for damp heat chambers
GB/T 10589 Specifications for low temperature test chambers
GB/T 11158 Specifications for high temperature test chambers
GB/T 18664-2002 Selection, use and maintenance of respiratory protective
equipment
GB/T 23465-2009 Respiratory protective equipment - Practical performance
evaluation methods
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Particle
Solid, liquid or particle mixed with solid and liquid suspended in air, such as
dust, smoke, mist and microorganisms.
[GB/T 18664-2002, definition 3.1.15]
3.2
Dust
The tiny solid particles suspended in the air, which are generally produced
by the solid materials being broken by mechanical forces.
[GB/T 18664-2002, definition 3.1.16]
3.3
Non-powered air-purifying respirator
Filtered respirator that relies on the wearer’s breathing to overcome the
airflow resistance of the component.
[GB/T 18664-2002, definition 3.1.3]
4 Classification and marking
4.1 Classification of facepiece
According to the structure, the facepiece is divided into three types. disposable
facepiece, replaceable half facepiece, full facepiece.
4.2 Classification of filter element
Filter elements are divided into two categories. KN and KP. Category KN is only
suitable for filtering non-oily particles; category KP is suitable for filtering oily
and non-oily particles.
4.3 Grades of filter element
According to the level of filter efficiency, the grades of filter elements is classified
according to Table 1.
4.4 Marking
The filter elements of disposable facepieces and replaceable facepieces shall
be marked with grades; the grades shall be marked with a combination of the
number of this standard and the type and grade of filter elements.
Example 1.The KN90 filter element is marked as GB 2626-2019 KN90.
Example 2.The KP100 filter element is marked as GB 2626-2019 KP100.
5 Technical requirements
5.1 Basic requirements
Check in accordance with 6.1 and evaluate in 6.16.The material and structural
design of the respirator shall meet the following requirements.
a) The material shall meet the following requirements.
1) Materials that are in direct contact with the face shall be harmless to
the skin;
2) The filter material shall be harmless to the human body;
3) The material used shall have sufficient strength; in normal use, it shall
not be damaged and deformed that affects the use effect;
4) No obvious tenderness or tingling sensation when wearing it.
b) The structural design shall meet the following requirements.
1) It shall not be easy to cause structural damage; the design, composition,
installation of components shall not pose any danger to the user;
2) The design of the head harness shall be elastic material or adjustable,
for easy wearing and removal. It shall be able to firmly fit the facepiece
on the face; there shall be no obvious compression or tenderness when
wearing. The head harness of replaceable half facepiece and full
facepiece shall be designed to be replaceable;
3) If the facepieces of the same size and the same style have different
wearing methods, they shall be tested as different products;
Note 1.Different wearing methods of the same style facepiece will affect the
tightness of the facepiece.
5.2 Visual inspection
Check it in accordance with 6.1.
The surface of the sample shall neither be damaged, deformed, nor have other
obvious defects. The material and structure of the component shall be able to
withstand normal use conditions and the temperature, humidity and mechanical
shock that may be encountered. After the temperature and humidity
pretreatment and mechanical strength pretreatment according to the method of
6.2, the components shall not fall off, be damaged or deformed. The inspection
shall also include markings and various information as provided by the
manufacturer.
5.3 Filter efficiency
Use sodium chloride (NaCl) particles to test the KN filter elements. Use dioctyl
phthalate (DOP) or oil particles (such as paraffin oil) of equivalent nature to test
the KP filter elements.
Perform testing in accordance with the method of 6.3.
In the testing process, the filter efficiency of each sample shall always meet the
requirements of Table 2.
5.4 Leakage
5.4.1 TIL for disposable facepieces
Perform test in accordance with the method of 6.4.The TIL of disposable
facepieces shall meet the requirements of Table 3.
5.4.2 IL of replaceable half facepiece
Perform test in accordance with the method of 6.4.When using the IL of each
action (i.e. 10 people x 5 actions) as the basis for evaluation, the IL of at least
46 of the 50 shall be less than 5%. When using the overall IL of person as the
basis for evaluation, the overall IL of at least 8 persons of the 10 persons under
test shall be less than 2%.
5.5 Breathing resistance
Perform test in accordance with the method of 6.5 and 6.6.
The inhalation resistance and exhalation resistance of all types of respirators
shall meet the requirements of Table 4.
5.6 Exhalation valve
5.6.1 Air tightness of exhalation valve
Detects only half facepieces. The exhalation valve shall meet the following
requirements.
When tested according to the method of 6.7, the leakage flow rate of the
exhalation valve of each respirator shall not be greater than 30 mL/min; if the
facepiece is provided with multiple exhalation valves, the leakage airflow that
each exhalation valve shall meet shall be shared equally, for example, if the
respirator facepiece is provided with 2 exhalation valves, the leakage air flow of
each exhalation valve shall not be greater than 15 mL/min.
5.6.2 Protection device of exhalation valve
Perform test in accordance with the method of 6.8.
The exhalation valve’s protection device shall not slip, break and deform when
it is subjected to the axial tensile force as specified in Table 5.
5.7 Dead space
Perform test in accordance with the method of 6.9.
The average dead space result of the respirator shall not be greater than 1%.
5.8 View field
Perform test in accordance with the method of 6.10.
The view field of the respirator shall meet the requirements of Table 6.
5.9 Head harness
Perform test in accordance with the method of 6.11.
Each head harness, buckle and other adjustment parts of the respirator shall
not slip or break when it is subjected to the tensile force as specified in Table 7.
5.10 Connections and connecting parts
Perform test in accordance with the method of 6.12.
Under the specified test conditions, all connections and connection parts
between the replaceable filter element and the facepiece, and between the
breathing hose and the filter element and the facepiece, shall not slip, break or
deform when subjected to the axial tensile force as specified in Table 8.
5.11 Lens
5.11.1 Only full facepieces are tested.
5.11.2 Perform test in accordance with the method of 6.13.The lens of each
sample shall not be broken or cracked. Then test the airtightness in accordance
with the method of 6.14, which shall meet the requirements of 5.12.
5.11.3 Perform test in accordance with the method of 6.16.The lens shall not
cause distortion of the visual object.
5.11.4 If a product is added with ant-dimming paste, or an anti-fogging agent is
designed to be used, the anti-fogging agent shall not use known harmful
substances; after using the ant-dimming paste and / or anti-fogging agent, it
shall not cause vision deformation or blurring; anti-fog agents shall not cause
irritation and other discomfort to humans. They are tested in accordance with
methods 6.1 and 6.16.
5.12 Air tightness
Perform test in accordance with the method of 6.14.
Under the specified testing conditions, the pressure change in each full
facepiece within 60 s shall not be greater than 100 Pa.
5.13 Flammability
5.13.1 If the product design is non-flammable, it shall provide the information in
accordance with the requirements of 5.16c) 1).
5.13.2 If the product is designed to be flame-retardant, it shall be tested in
accordance with the method of 6.15.After the parts exposed to the flame are
removed from the flame, the continuous burning time shall not exceed 5 s.
5.14 Cleaning and disinfection
5.14.1 If the product design allows the filter element to be reused after cleaning
and / or disinfection, it shall meet the requirements of 5.16d); meanwhile the
filter element shall be able to withstand the cleaning or disinfection treatment
as recommended by the manufacturer. The cleaned or disinfected sample shall
meet the requirements of 5.3 for filter efficiency, 5.4 for leakage, 5.5 for
inhalation resistance. The manufacturer shall provide the user with the correct
and effective method for determining whether the filter element will continue to
be effective after cleaning or disinfection.
5.14.2 For replaceable facepieces, the facepieces shall be able to withstand
the cleaning or disinfection treatment as recommended by the manufacturer;
the samples after cleaning or disinfection shall meet the requirements of 5.4.
5.15 Practical performance
Perform test in accordance with the method of 6.16.Under the conditions of
simulated use, the performance which is hard to be evaluated by the use of
other testing methods, such as the performance specified in 5.1b) and 5.11, the
subject will provide subjective evaluation.
If the respirator fails the test, the laboratory shall describe the test method in
detail, so that other laboratories can repeat the test process.
6 Testing methods
6.1 Visual inspection
According to the requirements of various technical requirements (see Appendix
A), before performing laboratory performance testing, the samples shall be
visually inspected.
6.2 Pretreatment
6.2.1 Temperature and humidity pretreatment
6.2.1.1 Number of samples and requirements
2 un-conditioned samples; or quantities required by other testing methods.
6.2.1.2 Testing equipment
The testing equipment shall meet the following requirements.
a) The technical performance of the high temperature test chamber shall
meet the requirements of GB/T 11158;
b) The technical performance of the low temperature test chamber shall meet
the requirements of GB/T 10589;
c) The technical performance of the damp heat test chamber shall meet the
requirements of GB/T 10586.
6.2.1.3 Testing methods
Remove the samples from the original packaging and process them in the
following order.
a) Place it at (38 ± 2.5) °C and (85 ± 5)% relative humidity for (24 ± 1) h;
b) Place it in a dry environment at (70 ± 3) °C for (24 ± 1) h;
c) Store it at (-30 ± 3) °C for (24 ± 1) h.
The pretreatment method used shall avoid thermal shock; allow the sample
temperature to return to room temperature for at least 4 hours before
subsequent pretreatment or testing.
6.2.2 Mechanical strength pretreatment
6.2.2.1 Number of samples and requirements
It is only applicable to replaceable filter elements. 2 untreated samples; or
quantities required by other testing methods.
6.2.2.2 Testing equipment
The vibration test device is as shown in Figure 1.The device consists of a steel
box, a steel platform, a cam, a drive, a control system on which the sample is
placed; the steel box is fixed on a support that can be moved vertically. The
steel box is lifted by 20 mm through the rotation of the cam. Then let it fall on a
steel platform by its own weight, to generate a vibration. The mass of the steel
box shall be greater than 10 kg. The mass of the steel platform shall be at least
10 times the mass of the steel box. The cam’s rotation frequency is (100 ± 5)
r/min.
6.2.2.3 Test methods
Take the sample out of the package. The non-encapsulated filter element shall
be the smallest sales package.
Place the sample laterally in the steel box; the placement method shall ensure
that the samples will not contact each other during the test. It allows for 6 mm
horizontal movement interval and free vertical movement distance.
The duration of vibration testing is 20 min.
After the test is over, perform the follow-up tests.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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