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呼吸防护 自吸过滤式防颗粒物呼吸器
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GB 2626-2019
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标准编号: GB 2626-2019 (GB2626-2019)
中文名称: 呼吸防护 自吸过滤式防颗粒物呼吸器
英文名称: [N95/KN95 face mask] Respiratory protection -- Non-powered air-purifying particle respirator
行业: 国家标准
中标分类: C73
国际标准分类: 13.340.30
字数估计: 41,438
发布日期: 2019-12-31
实施日期: 2020-07-01
起草单位: 中钢集团武汉安全环保研究院有限公司、军事科学院防化研究院、3M中国有限公司
归口单位: 中华人民共和国应急管理部
提出机构: 中华人民共和国应急管理部
发布机构: 国家市场监督管理总局、国家标准化管理委员会
范围: 本标准适用于防护颗粒物的自吸过滤式呼吸器。本标准不适用于防护有害气体和蒸气的呼吸器，不适用于缺氧环境、水下作业、逃生和消防用呼吸器。
GB 2626-2019: 呼吸防护 自吸过滤式防颗粒物呼吸器
GB 2626-2019 英文名称: [N95/KN95 face mask] Respiratory protection -- Non-powered air-purifying particle respirator
1 范围
本标准规定了自吸过滤式防颗粒物呼吸器的分类和标记、技术要求、检测方法和标识。
本标准适用于防护颗粒物的自吸过滤式呼吸器。
本标准不适用于防护有害气体和蒸气的呼吸器,不适用于缺氧环境、水下作业、逃生和消防用呼
吸器。
2 规范性引用文件
下列文件对于本文件的应用是必不可少的。凡是注日期的引用文件,仅注日期的版本适用于本文
件。凡是不注日期的引用文件,其最新版本(包括所有的修改单)适用于本文件。
GB 2890-2009 呼吸防护 自吸过滤式防毒面具
GB/T 5703 用于技术设计的人体测量基础项目
GB/T 10586 湿热试验箱技术条件
GB/T 10589 低温试验箱技术条件
GB/T 11158 高温试验箱技术条件
GB/T 18664-2002 呼吸防护用品的选择、使用与维护
GB/T 23465-2009 呼吸防护用品 实用性能评价
3 术语和定义
下列术语和定义适用于本文件。
3.1
颗粒物
悬浮在空气中的固态、液态或固态与液态混合的颗粒状物质,如粉尘、烟、雾和微生物。
3.2
粉尘
悬浮在空气中的微小固体颗粒物,一般由固体物料受机械力作用破碎而产生。
3.3
自吸过滤式呼吸器
靠佩戴者呼吸克服部件气流阻力的过滤式呼吸器。
3.4
密合型面罩
能罩住口和鼻,与面部密合的面罩,或能罩住眼睛、口和鼻,与头面部密合的面罩。
注1:密合型面罩分半面罩和全面罩。
注2:改写GB/T 18664-2002,定义3.1.5。
3.5
半面罩
能覆盖口和鼻,或覆盖口、鼻和下颌的密合型面罩。
注:半面罩分随弃式面罩和可更换式半面罩。
3.6
全面罩
能覆盖眼睛、口、鼻和下颌的密合型面罩。
3.7
随弃式面罩
主要是由滤料构成面罩主体的一种半面罩,可设呼气阀。
3.8
可更换式面罩
有单个或多个可更换过滤元件的密合型半面罩和全面罩,可设呼吸气阀和/或呼吸导管。
3.9
吸气阀
只允许吸入气体通过其进入面罩,防止呼出气体通过它排出面罩的单向阀门。
3.10
呼气阀
只允许呼出气体通过其排出面罩,防止吸入气体通过它进入面罩的单向阀门。
3.11
呼吸导管
用于连接面罩与过滤元件的柔软、气密的导气管。
3.12
过滤元件
过滤式呼吸器使用的,可滤除吸入空气中有害物质的过滤材料或过滤组件。
示例:滤毒罐(滤毒盒)、滤尘盒、滤料等。
3.13
过滤效率
在规定检测条件下,过滤元件滤除颗粒物的水平。
3.14
穿透率
在规定检测条件下,颗粒物穿透过滤元件的水平。
注:穿透率=100%-过滤效率。
3.15
总泄漏率
在规定的实验室检测环境下,受试者吸气时从包括过滤元件在内的所有面罩部件泄漏入面罩内的
模拟剂的浓度与呼吸器面罩外测试环境中模拟剂浓度的比值。
3.16
泄漏率
在规定的实验室检测环境下,受试者吸气时从除过滤元件以外的面罩所有其他部件泄漏入面罩内
的模拟剂浓度与呼吸器面罩外测试环境中模拟剂浓度的比值。
3.17
死腔
从前一次呼气中被重新吸入的二氧化碳气体的体积分数。
3.18
头带
用于将面罩固定在头部的部件。
佩戴气密性检查
由呼吸器佩戴者自己进行的一种简便的密合性检查方法,用以确保密合型面罩佩戴正确。
3.20
指定防护因数
一种或一类适宜功能的呼吸防护用品,在适合使用者佩戴且正确使用的前提下,预期能将空气污染
物浓度降低的水平。
3.21
计数中位径
当把颗粒物按粒径大小排序时,比它粒径大的和比它粒径小的颗粒物个数各占颗粒物总数量50%
3.22
质量中位径
当把颗粒物按粒径大小排序时,比它粒径大的和比它粒径小的颗粒物质量各占颗粒物总质量50%
的粒径。
3.23
空气动力学粒径
与所考虑的颗粒物有相同沉降速度的单位密度球形颗粒的直径。
3.24
空气动力学质量中位径
总质量50%的粒径。
4 分类和标记
4.1 面罩分类
面罩按结构分为随弃式面罩、可更换式半面罩和全面罩三类。
4.2 过滤元件分类
过滤元件按过滤性能分为KN和KP两类,KN类只适用于过滤非油性颗粒物,KP类适用于过滤
油性和非油性颗粒物。
4.3 过滤元件级别
根据过滤效率水平,过滤元件的级别按表1分级。
GB 2626-2019
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
6.2 Pretreatment ... 20
6.3 Filter efficiency ... 22
6.4 Leakage ... 26
6.5 Inhalation resistance ... 31
6.6 Exhalation resistance ... 34
6.7 Air tightness of exhalation valve ... 34
6.8 Protection device of exhalation valve ... 36
6.9 Dead space ... 36
6.10 View field ... 38
6.11 Head harness ... 38
6.12 Connections and connecting parts ... 39
6.13 Lens ... 40
6.14 Air tightness ... 40
6.15 Flammability ... 41
6.16 Practical performance ... 42
7 Product marking ... 43
7.1 Markings on the product ... 43
7.2 Marking on the packaging ... 43
Appendix A (Informative) Summary of testing requirements ... 45
Appendix B (Informative) CMD and MMAD conversion method ... 48
Appendix C (Normative) Method for judging whether KP filter element’s loading
filter efficiency continues to decrease ... 51
Appendix D (Normative) Main dimensions of test head mold ... 53
Appendix E (Informative) Main differences between this standard and the 2006
edition ... 54
References ... 57
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
Non-powered air-purifying particle respirator".
Compared with GB 2626-2006, the main changes in this standard are as follows:
- CHANGE the standard name from "Respiratory protection equipment -
Non-powered air-purifying particle respirator" to "Respiratory protection -
Non-powered air-purifying particle respirator";
- DELETE three terms "smoke", "fog" and "microorganism"; ADD seven
terms "penetration", "user face-seal check", "assigned protection factor",
"count median diameter", "mass median diameter", "aerodynamic
diameter", "mass median aerodynamic diameter" (see 3.14 and 3.19 ~
- MODIFY the requirements for inspiratory resistance and expiratory
resistance of various types of respirators (see 5.5);
- MODIFY the requirements and test methods for air tightness of exhalation
valves (see 5.6.1 and 6.7);
- MODIFY the name of the exhalation valve cover to an exhalation valve
protection device (see 5.6.2 and 6.8);
- MODIFY the vision requirements for various types of respirators (see 5.8);
- ADD the requirements and test methods for products that the manufacturer
claims filter elements can be reused after cleaning and / or disinfection [see
- ADD the practical performance requirements and testing methods (see 5.15
and 6.16);
- ADD a description of the method of judging the service life of filter elements
in the information part to be provided by the manufacturer; ADD the
application restrictions on non-flame-retardant products (see 5.16);
- In the testing method of filter efficiency, ADD the conversion method of
particle size used for testing of filter efficiency (see Appendix B),
requirements for accuracy and resolution of particle detector for the filter
efficiency testing equipment (see 6.3.2) and judgment of loading end point
(see 6.3.3);
- In the testing method of leakage, ADD requirements for sample inspection
(see 6.4.1.4); ADD the accuracy requirements for particle detectors (see
6.4.2.4); ADD a formula for calculating the inward leakage by subject [see
formula (5)];
- ADD the schematic diagram of the structure of the built-in breathing hose
for the test head mold for breathing resistance testing and dead space
testing (see Figure 4);
- In the test method of breathing resistance, MODIFY the requirements for
airtightness between the respirator facepiece and the test head mold (see
6.5.4 and 6.6.4);
- MODIFY the schematic diagram of the testing device for dead space (see
Figure 6);
- In the test method of head harness, ADD the requirement to apply the test
tensile force in the direction in which the head harness is stretched during
normal use (see 6.11.3).
Note: See Appendix E for the main differences between this standard and the
2006 edition.
Ministry of Emergency Management of the People's Republic of China.
Drafting organizations of this standard: China Iron and Steel Group Wuhan
Safety and Environmental Protection Research Institute Co., Ltd., Academy of
Military Science and Chemical Research Institute, 3M China Co., Ltd.
The main drafters of this standard: Cheng Jun, Ding Songtao, Yang Xiaobing,
Yao Hong, Zhou Xiaoping, Cai Xialin, Zhang Shouxin, Yu Jingjing.
This standard was first issued in 1981, revised to GB/T 2626-1992 in 1992, then
revised to GB 2626-2006 in 2006.
Respiratory protection - Non-powered air-purifying
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 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
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.
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.
3.4
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.
Note 1: The close-fitting facepiece is divided into a half facepiece and a full
facepiece.
Note 2: Rewrite GB/T 18664-2002, definition 3.1.5.
3.5
A tight-fitting facepiece that covers the mouth and nose, or covers the mouth,
nose, and jaw.
Note: Half facepieces are divided into disposable facepieces and
replaceable half facepieces.
3.6
Full facepiece
Tight-fitting facepiece that covers eyes, mouth, nose and jaw.
3.7
Disposable facepiece
with an exhalation valve.
3.8
Replaceable facepiece
Closed half-facepieces and full facepieces with single or multiple
replaceable filter elements, which can be provided with breathing valves and
/ or breathing hose.
3.9
Inhalation valve
A one-way valve that only allows inhaled air to enter the facepiece and
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