GB 2626-2006 English PDF

GB 2626-2006: [Replaced by GB 2626-2019] Respiratory protective equipment -- Non-powered air-purifying particle respirator
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GB 2626-2006
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 13.340.30
C 73
Replacing GB/T 2626-1992, GB/T 6223-1997, GB/T 6224.1~6224.4-1986
Respiratory protective equipment -
Non-powered air-purifying particle respirator
ISSUED ON: MARCH 27, 2006
IMPLEMENTED ON: DECEMBER 01, 2006
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine of the PRC;
Standardization Administration of the PRC.
Table of Contents
Foreword ... 3 
1 Scope ... 5 
2 Normative references ... 5 
3 Terms and definitions ... 6 
4 Classification and marking ... 8 
5 Technical requirements ... 9 
6 Testing methods ... 15 
7 Identification ... 33 
Appendix A (Informative) Summary of testing requirements ... 35 
Appendix B (Informative) Main dimensions of test head mold ... 38 
Appendix C (Informative) Comparison of the revised standard with the previous
standard and some superseded standards ... 39 
Bibliography ... 42 
Respiratory protective equipment -
Non-powered air-purifying particle respirator
1 Scope
This Standard specifies the technical requirements, testing methods, and
identification of non-powered air-purifying particle respirator.
This Standard applies to non-powered air-purifying respiratory protective
equipment against all kinds of particles.
This Standard does not apply to respiratory protective equipment against
harmful gases and vapors. It does not apply to the respiratory protective
equipment for hypoxic environments, underwater operations, escape, fire-
fighting.
2 Normative references
The following documents contain provisions which, through reference in this
Standard, constitute provisions of this Standard. For the dated references, their
subsequent amendments (excluding corrections) or revisions do not apply to
this Standard. However, the parties who enter into agreement based on this
Standard are encouraged to investigate whether the latest editions of these
documents are applicable. For undated reference documents, the latest
editions apply to this Standard.
GB/T 2891 Performance test methods for facepiece of filter type respirator
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
3 Terms and definitions
The following terms and definitions apply to this Standard.
3.1 Particle
Solid, liquid or particle mixed with solid and liquid suspended in air, such as
dust, fume, 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 Fume
The tiny solid particles suspended in the air, which are generally produced by
the condensation of gas or vapor, and of which the particle size is usually
smaller than that of dust.
[GB/T 18664-2002, definition 3.1.17]
3.4 Mist
The tiny droplets suspended in the air.
[GB/T 18664-2002, definition 3.1.18]
3.5 Microorganism
Tiny creatures in nature with small shapes and simple structures which cannot
be observed directly with the eye and can only be seen under an optical
microscope or an electron microscope.
3.6 Non-powered air-purifying respiratory protective equipment
Filtered respiratory protective equipment that relies on the wearer’s breathing
to overcome the airflow resistance of the component.
[GB/T 18664-2002 , definition 3.1.3]
3.7 Tight-fitting facepiece
A facepiece that can cover the mouth and nose and fit tightly to the face, or a
facepiece that can cover the eyes, mouth, and nose and fit tightly to the head
and face. The tight-fitting facepiece is divided into a half facepiece and a full
facepiece.
[GB/T 18664-2002, definition 3.1.5]
3.8 Half facepiece
A tight-fitting facepiece that covers the mouth and nose, or covers the mouth,
nose, and jaw.
3.9 Full facepiece
A tight-fitting facepiece that covers mouth, nose, eyes, and jaw.
3.10 Disposable facepiece
A half facepiece mainly composed of a filter material, with or without an
exhalation valve, which cannot be cleaned and reused and shall be discarded
immediately when any component fails.
3.11 Replaceable facepiece
A tight-fitting facepiece with single or multiple replaceable filter elements, with
or without breathing valve, with or without breathing hose.
3.12 Inhalation valve
The check valve on the respiratory protective equipment, which only allows
inhalable gas to enter the facepiece and prevents exhaled air from exiting
through it.
3.13 Exhalation valve
The check valve on the respiratory protective equipment, which only allows
exhaled gas to exit the facepiece and prevents inhaled air from entering the
facepiece through it.
3.14 Breathing hose
A flexible, air-tight air hose for connecting a facepiece to a filter element.
3.15 Filter element
Filter materials or filter components used in air-purifying respiratory protective
equipment to filter out harmful substances in the inhaled air.
Example: canisters (filter cartridges), dust canisters, filter media, etc.
[GB/T 18664-2002, definition 3.1.22]
3.16 Filter efficiency
Percentage of particle removed by the filter element under specified testing
conditions.
3.17 Total inward leakage; TIL
The ratio OF the concentration of the simulant leaking into the facepiece from
all the facepiece components including the filter element TO the concentration
of the simulant in the inhaled air, when the subject inhales, under the testing
conditions specified by the laboratory, expressed as a percentage.
3.18 Inward leakage; IL
The ratio OF the concentration of the simulant leaking into the facepiece from
all the facepiece components other than the filter element TO the concentration
of the simulant in the inhaled air, when the subject inhales, under the testing
conditions specified by the laboratory, expressed as a percentage.
3.20 Head harness
A component for fixing the facepiece on the head.
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, according to the filtration performance, 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
harness of replaceable half facepiece and full facepiece shall be designed
to be replaceable;
c) There shall be as little dead space and larger field of view as possible;
e) Respiratory protective equipment which uses replaceable filter elements,
inhalation valves, exhalation valves, head harness shall be designed for
easy replacement; meanwhile it allows the user to check the airtightness
of the facepiece and face at any time and conveniently;
f) The breathing hose shall not restrict the movement of the head or the user;
it shall not affect the tightness of the facepiece; it shall not restrict or block
the airflow;
g) The structure of the disposable facepiece shall ensure close fit with the
face; meanwhile it shall not deform during service life.
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. The head harness shall be
adjustable. The head harness of replaceable facepiece shall be designed to be
replaceable. The lenses of the full facepiece, when wearing, shall not affect the
vision, such as fogging. 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 identifications and various information as provided by the
manufacturer.
5.3 Filter efficiency
USE sodium chloride (NaCl) particles to test the type N filter elements. USE
dioctyl phthalate (DOP) or oily particles (such as paraffin oil) of equivalent
nature to test the type P 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.
facepiece within 60 s shall not be greater than 100 Pa.
5.15 Information to be provided by the manufacturer
Perform inspection in accordance with the method of 6.1.
It shall, in accordance with the relevant provisions of GB/T 18664, judge the
correctness of the information provided by the manufacturer.
5.15.1 The information provided by the manufacturer shall meet the
following requirements:
a) It shall be provided with the smallest sales package.
b) There shall be instructions in Chinese.
c) It shall include the following information that the user must know:
1) Application scope and restrictions;
2) For replaceable filter elements, explain how to use them with full
facepieces or half facepieces. If multiple filter materials are used, they
shall be indicated;
3) Assembly method of replaceable facepiece;
4) Inspection method before use;
5) How to wear and how to do air tightness check;
6) Advice on when to replace the filter element;
7) If applicable, maintenance methods (e.g. cleaning and disinfection
methods);
8) Storage method;
9) Meaning of any symbols and icons used.
d) It shall provide warnings about problems that may be encountered during
use, such as:
1) Fitness;
2) The hair under the seal frame will cause the facepiece to leak;
3) Air quality (pollutants, hypoxia, etc.).
e) The information shall be clear; it may add the help explanations such as
commentary, part number and labeling.
5.16 Packaging
Perform inspection in accordance with the method of 6.1.
Sales packaging shall protect the product from mechanical damage and
contamination before use.
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
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 method
Note: The pretreatment method used shall avoid thermal shock.
Remove the sample from the original packaging and process it in the following
order:
6.2.2 Mechanical strength pretreatment
It is only applicable to replaceable filter elements.
6.2.2.1 Number of samples and requirements
2 un-conditioned 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. Through
the rotation of the cam, the steel box is lifted by 20 mm. 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 r/min.
6.2.2.3 Testing method
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 spacing and free vertical movement distance.
6.3.2.1 Testing system for filter efficiency of NaCl particle
The main technical parameters are as follows:
a) The concentration of NaCl particles does not exceed 200 mg/m3. The
count median diameter (CMD) is (0.075±0.020) μm. The geometric
standard deviation of the particle size distribution is not greater than 1.86;
b) The dynamic range of the particle detector is (0.001~200) mg/m3; the
accuracy is 1%;
c) The testing flow range is (30~100) L/min; the accuracy is 2%;
d) The testing range of filter efficiency is 0~99.999%;
e) There shall be a device capable of neutralizing the charge of the particles
that has occurred.
6.3.2.3 Testing conditions
The testing temperature condition of KN type filter element is (25±5)°C; the
relative humidity is (30±10)%; the concentration of NaCl particles shall not
exceed 200 mg/m3.
The testing temperature condition of KP type filter element is (25±5)°C; the
concentration of oily particles shall not exceed 200 mg/m3.
The testing flow rate is (85±4) L/min. If it is a multiple filter element, the flow
rate shall be divided equally; for example, for a dual filter element design, the
testing flow rate of each filter element shall be (42.5±2) L/min. If multiple filter
elements are likely to be used alone, they shall be tested according to the
testing conditions of a single filter element.
6.3.3 Testing method
First adjust the filter efficiency testing system to the testing state; adjust the
relevant test parameters.
USE appropriate...