GB 24539-2021 PDF in English
GB 24539-2021 (GB24539-2021) PDF English
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Protective clothing. Chemical protective clothing
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GB 24539-2021: PDF in English GB 24539-2021
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 13.340.10
CCS C 73
Replacing GB 24539-2009, GB 24540-2009, GB/T 29511-2013
Protective clothing - Chemical protective clothing
ISSUED ON: AUGUST 10, 2021
IMPLEMENTED ON: SEPTEMBER 01, 2022
Issued by: State Administration for Market Regulation.
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 7
4 Types and codes ... 10
5 Technical requirements ... 11
6 Test methods ... 32
7 Signs ... 38
Appendix A (Normative) Test method for overall gas tightness of chemical protective
clothing ... 40
Appendix B (Normative) Test method for inward leakage rate of chemical protective
clothing ... 43
Appendix C (Normative) Test method for liquid tightness performance of chemical
protective clothing ... 50
Appendix D (Normative) Test method for inward leakage rate of chemical protective
clothing providing protection against air borne solid particulate ... 60
Appendix E (Normative) Subject actions assessed by practical performance tests ... 67
Appendix F (Normative) Test method of liquid pressure penetration resistance ... 70
Appendix G (Normative) Test method for clothing material penetration time of woven
material liquid acid and alkali chemical protective clothing ... 83
Appendix H (Normative) Test method for hydrostatic pressure resistance of clothing
materials for woven material liquid acid and alkali chemical protective clothing ... 85
Appendix I (Normative) Test method for liquid repellency of clothing materials of
chemical protective clothing ... 87
Appendix J (Normative) Test method for abrasion resistance of clothing materials of
chemical protective clothing ... 93
Appendix K (Normative) Destructive test method for flexural resistance of clothing
materials of chemical protective clothing ... 96
References ... 99
Protective clothing - Chemical protective clothing
1 Scope
This document stipulates the type division, grading, marking, basic technical
requirements, test methods of chemical protective clothing.
This document applies to the chemical protective clothing required by employees in the
workplace and emergency rescue work.
This document does not apply to chemical protective clothing used in firefighting and
other occasions.
Note 1: This document does not specifically propose performance indicator requirements for
personal protective equipment, such as gloves, protective boots/shoes, protective masks, view
windows, safety glasses, breathing apparatus, unless the protective equipment is an integral part
of the protective clothing and provides corresponding chemical protection properties.
Note 2: The protection objects involved in this document include gaseous, liquid, solid chemical
substances.
2 Normative references
The contents of the following documents constitute essential provisions of this
document through normative references in the text. Among them, for dated reference
documents, only the version corresponding to the date applies to this document; for
undated reference documents, the latest version (including all amendments) applies to
this document.
GB/T 2912.1 Textiles - Determination of formaldehyde - Part 1: Free and
hydrolyzed formaldehyde (water extraction method)
GB/T 3820 Determination of thickness of textiles and textile products
GB/T 3917.3 Textiles - Tear properties of fabrics - Part 3: Determination of tear
force of trapezoid-shaped test specimens
GB/T 3920 Textiles - Tests for color fastness - Color fastness to rubbing
GB/T 3923.1 Textiles - Tensile properties of fabrics - Part 1: Determination of
maximum force and elongation at maximum force using the strip method
GB/T 4669 Textiles - Woven fabrics - Determination of mass per unit length and
mass per unit area
GB/T 4744 Textiles - Testing and evaluation for water resistance - Hydrostatic
pressure method
GB/T 7573 Textiles - Determination of pH of aqueous extract
GB/T 8629 Textiles - Domestic washing and drying procedures for textile testing
GB/T 8685 Textiles - Care labeling code using symbols
GB/T 12586 Rubber-or plastics-coated fabrics - Determination of resistance to
damage by flexing
GB/T 13640 Size designation of protective clothing
GB/T 13773.2 Textiles - Seam tensile properties of fabrics and made-up textile
articles - Part 2: Determination of maximum force to seam rupture using the grab
method
GB/T 17592 Textiles - Determination of the banned azo colorants
GB 18401 National general safety technical code for textile products
GB/T 19981.2 Textiles - Professional care, drycleaning and wet cleaning of fabrics
and garments - Part 2: Procedure for testing performance when cleaning and
finishing using tetrachloroethene
GB/T 20655 Protective clothing - Mechanical properties - Determination of the
resistance to puncture
GB/T 21196.2-2007 Textiles - Determination of the abrasion resistance of fabrics by
the Martindale method - Part 2: Determination of specimen breakdown
GB/T 21294-2014 Testing methods of physical and chemical performance of
garments
GB/T 23344 Textiles - Determination of 4-aminoazobenzene
GB/T 23462 Protective clothing - Test method for chemical protective materials to
permeation by chemicals
ISO 15797 Textiles - Industrial washing and finishing procedures for testing of
workwear
3.6
Gas-tight chemical protective clothing
A single-piece chemical protective clothing with hood, window, hand and foot
protection, which can protect against higher levels of toxic and harmful chemicals
(gas, liquid, solid particles, etc.), when used in conjunction with appropriate
respiratory protective equipment.
3.7
Chemical protective suits for emergency response team
Type of chemical protective clothing, which is worn by workers during emergency
rescue work.
Note: The abbreviation "ET" represents the chemical protective clothing used by emergency
rescue response teams, such as: gas-tight chemical protective suits for emergency response
team, liquid jet tight chemical protective suits for emergency response team.
3.8
Gas-tight chemical protective suits for emergency response team
A single-piece chemical protective clothing worn by workers during emergency
rescue work, which is equipped a hood, view window, hand and foot protection; can
protect against toxic and harmful chemical substances, such as gases, liquids, solid
particles.
3.9
Liquid tight chemical protective clothing
Protective clothing to protect against liquid chemicals.
Note: A full-body protective suit that maintains a liquid-tight connection, between the
various parts of the protective suit, as well as between the hood, gloves, shoes, visor or
respiratory protection and other equipment used in conjunction with it. It can be a single
jumpsuit, a suit with upper and lower parts, or a matching hood, visor, socks, boots, gloves,
etc.
3.10
Liquid jet tight chemical protective clothing
Full body protective clothing for protection against liquid chemicals with high
pressure.
Note: Maintain spray liquid-tight connections between the various components of the
protective clothing, as well as between the hoods, gloves, shoes, visors or respiratory
protection equipment used with them. It can be a single jumpsuit, an upper and lower body
suit, or it can be equipped with a hood, visor, socks, boots, gloves, etc.
3.11
Liquid spray tight chemical protective clothing
Full-body protective clothing for protection against liquid chemicals with low or no
pressure.
Note: Keep spray liquid-tight connections between the various components of the protective
clothing, as well as between the hoods, gloves, shoes, visors or respiratory protection
equipment used with them. It can be a single jumpsuit, an upper and lower body suit, or it
can be equipped with a hood, visor, socks, boots, gloves, etc.
3.12
Chemical protective clothing providing protection against airborne solid
particulate
Full-body protective clothing to protect against solid chemical particles in the air in
the workplace.
Note: It can be equipped with or without gloves and boot covers.
3.13
Limited liquid spray chemical protective clothing
Full-body protective clothing capable of providing limited protection against liquid
chemicals.
Note: Maintain a limited spray liquid-tight connection between each component of the
protective clothing, as well as between the hood, gloves, shoes, visor or respiratory
protection and other equipment used with it. It can be a single jumpsuit, a two-piece upper
and lower body suit, or it can be equipped with a hood, socks, boots, shoe covers, etc.
3.14
Woven material liquid acid and alkali chemical protective clothing
Protective clothing made of woven clothing materials, that can protect against liquid
acidic and/or alkaline chemicals (excluding hydrofluoric acid, ammonia, organic
acids and bases).
Note: Woven material liquid acid and alkali chemical protective clothing is divided into
Type 1a: Gas-tight chemical protective clothing with built-in self-contained
breathing apparatus;
For example, chemical protective clothing with built-in self-contained compressed
air breathing apparatus;
Type 1b: Gas-tight chemical protective clothing with external self-contained
breathing apparatus;
For example, chemical protective clothing with external self-contained compressed
air breathing apparatus;
Type 1c: Gas-tight chemical protective clothing that provides positive pressure into
the protective clothing through an external respiratory air source;
For example, long-tube air supply gas-tight protective clothing.
c) All type 1 chemical protective clothing shall be made of clothing materials, that
are resistant to chemical penetration; it shall provide personnel with a clean air
source for breathing through a self-contained (built-in or external to the protective
clothing) respirator or other external air supply device.
d) Type 1a and 1c chemical protective clothing shall be equipped with 2 or more
one-way exhaust valves; type 1b chemical protective clothing shall be equipped
with 1 or more one-way exhaust valves. It is required that when exhausting from
the inside of the chemical protective clothing to the environment, it can
completely prevent the reverse inflow of external gas.
e) Design transparent view windows with chemical protection functions on the eyes
and face to meet the observation needs of the wearer. If necessary, the
manufacturer shall provide defogging measures for the visor.
f) Each product of type 1 chemical protective clothing shall pass the overall gas
tightness test. In addition, type 1b and type 1c chemical protective clothing whose
masks are not permanently fixed to the garment shall also pass the inward leakage
rate test.
g) It is allowed to wear protective clothing, protective gloves and/or protective
boots/shoes outside of chemical protective clothing, to meet all performance
requirements of chemical protective clothing. All parts of the combination and its
layers of materials shall be tested as a chemical protective clothing, as a whole.
5.2.2 Gas-tight chemical protective suits for emergency response team
The design of gas-tight chemical protective suits for emergency response team (Type
1-ET) shall comply with the following requirements:
a) The fully encapsulated chemical protective clothing is designed to provide overall
protection for the wearer’s torso, head, eyes, face, arms, hands, legs, feet.
b) The type 1-ET of gas-tight chemical protective clothing is divided into 1a-ET and
1b-ET types, which provide personnel with a clean air source for breathing
through a self-contained respirator (built-in or external).
Type 1a-ET: Gas-tight chemical protective clothing with built-in self-contained
breathing apparatus for emergency response team;
Type 1b-ET: Gas-tight chemical protective clothing with external self-contained
breathing apparatus for emergency response team.
c) Each product shall pass the overall gas tightness test. In addition, type 1b-ET
chemical protective clothing, in which the mask is not permanently fixed to the
garment, shall also pass the inward leakage rate test.
d) Type 1a-ET chemical protective clothing shall be equipped with two or more one-
way exhaust valves; type 1b-ET chemical protective clothing shall be equipped
with one or more one-way exhaust valves. It is required that the chemical
protective clothing can completely prevent the reverse inflow of external air,
when it exhausts from inside the protective clothing to the environment.
e) Design transparent view windows with chemical protection functions on the eyes
and face, to meet the observation needs of the wearer.
f) It is allowed to meet all performance requirements of chemical protective clothing,
by wearing protective clothing, protective gloves and or protective boots/shoes
over the chemical protective clothing. All multi-layer materials involving
combinations shall be tested as a whole.
5.2.3 Liquid jet tight chemical protective clothing and liquid jet tight chemical
protective suits for emergency response team
The design of liquid jet tight chemical protective clothing (type 3) and liquid jet tight
chemical protective suits for emergency response team (type 3-ET) shall comply with
the following requirements:
a) It shall provide at least protection for the wearer’s torso, head, arms, legs;
b) Chemical protective clothing materials shall meet the penetration and permeation
requirements of chemical substances;
c) Chemical protective clothing shall pass the liquid-tight jet test.
5.2.4 Liquid spray tight chemical protective clothing
The design of liquid spray tight chemical protective clothing (type 4) shall comply with
5.3.2.4 Liquid spray tight
According to the provisions of 6.7, the overall liquid spray tight performance test is
conducted on the liquid spray tight chemical protective clothing. The stain area formed
by penetrating liquid on the indicator clothing shall be less than 3 times the calibrated
stain area.
5.3.2.5 Limited liquid spray tight
According to the provisions of 6.8, the overall limited liquid spray tight performance
test is carried out on limited liquid spray chemical protective clothing and woven
material liquid acid and alkali chemical protective clothing. The stain area formed by
penetrating liquid on the indicator clothing shall be less than 3 times the calibrated stain
area.
5.3.2.6 Inward leakage rate of solid particles
According to the provisions of 6.9, the chemical protective clothing providing
protection against air borne solid particulate is tested for the inward leakage rate of solid
particles. The inward leakage rate of solid particles is Ljmn, 82/90 ≤ 30%; the total inward
leakage rate of a single-piece protective clothing is LS, 8/10 ≤ 15%.
Note 1: Ljmn, 82/90: Inward leakage rate is expressed as a percentage. 82/90 means that all 90
leakage rates are arranged, in order from small to large, and the 82nd inward leakage rate is
taken. The 90 data include the inward leakage rate of the all test actions, collection points, test
sample.
Note 2: LS, 8/10: Total inward leakage rate of a single-piece protective clothing. 8/10 refers to the
8th value in ascending order of the inward leakage rates of 10 protective clothing samples;
Note 3: If more than 10 protective clothing samples are tested, Ljmn, 82/90 data is taken at 91%,
from all leakage rates in ascending order; LS, 8/10 data is taken at 80%, from all inward leakage
rates in ascending order.
5.3.2.7 Practical performance
According to the provisions of 6.10, conduct overall practical performance test and
evaluation of gas-tight chemical protective clothing and gas-tight chemical protective
suits for emergency response team.
During the practical performance test, the chemical protective clothing shall not restrict
the subject from completing any prescribed actions.
The subject shall read a mark, which consists of four random characters, which are 100
mm high and 20 mm wide, at a distance of 6 m. If the distance between the hood of the
chemical protective clothing and the subject's glasses is not fixed, the hood or visor
shall be fixed in a typical position during the test.
If the following factors restrict the subject from completing any action of the practical
performance test, the subject shall subjectively evaluate and record relevant factors.
- Strap comfort.
- Safety of connections and joints.
- Ease of operation of control components and pressure gauges (if any).
- Visual clarity of the mask or visor.
- Surround view of the visor.
- Clothing comfort.
- Convenience of verbal communication.
- Other aspects indicated by the subject.
5.3.3 Chemical protective properties of clothing materials
5.3.3.1 Permeation performance
According to the provisions of 6.11, select the chemical substances listed in Table 5, to
conduct the permeation performance test of chemical protective clothing materials.
Grade and mark it according to Table 6, according to the minimum value of the
penetration time test results. Specific requirements are as follows:
a) For gas-tight chemical protective suits for emergency response team (type 1-ET),
at least 15 chemical substances in Table 5 shall be selected for testing; the
permeation properties of the tested 15 chemical substances shall not be lower than
level 3. The test results of the 15 chemical substances shall be listed in the
manufacturer's product technical specifications.
b) For gas-tight chemical protective clothing (type 1), 15 chemical substances in
Table 5 shall be selected for test. The permeation of at least 12 chemical
substances shall not be lower than level 3. The test results of 15 chemical
substances shall be listed in the manufacturer's product technical specifications.
c) For liquid jet tight chemical protective suits for emergency response team (type
3-ET), 15 chemical substances in Table 5 shall be selected for test. The
permeation of at least 12 chemical substances is not less than level 2. The test
results of all 15 chemical substances shall be listed in the manufacturer's product
technical specifications.
d) For liquid jet tight chemical protective clothing (type 3), at least one chemical
substance in Table 5 shall be selected for test; the permeation performance shall
not be lower than level 3.
5.3.4.7 High temperature resistance
According to the provisions of 6.27, after the clothing material is pretreated at 70 °C
for 8 hours, the breaking strength of clothing material shall not decrease by more than
30%.
5.3.4.8 Low temperature resistance
According to the provisions of 6.27, after the clothing material is pretreated at -30 °C
for 8 hours, the breaking strength of clothing material shall not decrease by more than
30%.
5.3.5 Material performance requirements for protective view windows, chemical
protective gloves, chemical protective boots/shoes
5.3.5.1 Protective view window
5.3.5.1.1 Permeation performance
The testing and grading of the permeation performance of view window materials shall
comply with the requirements of 5.3.3.1.
The view window material of the type 1-ET gas-tight chemical protective clothing shall
be tested with at least 15 chemicals listed in Table 5. The permeation of the 15 chemicals
shall be no less than level 3.
The view window material of type 1 gas-tight chemical protective clothing shall be
tested with 15 chemical substances in Table 5; the permeation of at least 12 chemical
substances shall not be lower than level 3. The test results for the 15 chemical
substances shall be listed in the manufacturer's product technical specifications.
5.3.5.1.2 Puncture resistance
The testing and grading of puncture resistance of view window materials shall comply
with the requirements of 5.3.4.6.
For gas-tight chemical protective clothing type 1-ET (including reusable chemical
protective clothing and limited use chemical protective clothing) and gas-tight chemical
protective clothing type 1, the puncture resistance of the view window material shall
not be lower than level 3.
5.3.5.2 Chemical protective gloves, chemical protective boots/shoes
5.3.5.2.1 Permeation performance of chemical protective gloves, chemical
protective boots/shoes materials
The testing and grading of the permeation performance of protective gloves and
protective boots/shoes materials shall comply with the requirements of 5.3.3.1.
For protective gloves and protective shoes/boot materials of type 1-ET gas-tight
chemical protective clothing, 15 chemical substances in Table 5 shall be selected for
testing. The permeation performance of the 15 chemicals shall not be lower than level
3.
For protective gloves and protective shoes/boot materials of type 1 gas-tight chemical
protective clothing, 15 chemical substances in Table 5 shall be selected for testing. The
permeation performance of at least 12 chemical substances shall not be lower than level
3. The test results for the 15 chemical substances shall be listed in the manufacturer's
product technical specifications.
5.3.5.2.2 Liquid pressure penetration resistance of chemical protective gloves and
chemical protective boots/shoes materials
The testing and grading of the liquid pressure penetration resistance of protective gloves
and protective boots/shoe materials shall comply with the requirements of 5.3.3.2.
For the chemical protective glove materials and chemical protective boots/shoe
materials of gas-tight chemical protective clothing type 1 and gas-tight chemical
protective clothing type 1-ET, 3 liquid chemical substances in Table 5 shall be selected
for testing; the liquid pressure penetration resistance shall be not less than level 1.
5.3.6 Requirements for joint performance
5.3.6.1 Permeation performance
The testing and grading of joint permeation performance of chemical protective
clothing shall comply with the requirements of 5.3.3.1.
For the joints of the type 1-ET gas-tight chemical protective clothing, 15 chemical
substances in Table 5 shall be selected for testing. The permeation performance of the
15 chemicals shall not be lower than level 3.
For the joints of type 1 gas-tight chemical protective clothing, 15 chemical substances
in Table 5 shall be selected for testing. The permeation performance of at least 12
chemicals shall be no less than level 3.
For the joints of the type 3-ET spray liquid tight chemical protective clothing, 15
chemical substances in Table 5 shall be selected for testing. The permeation
performance of at least 12 chemical substances shall not be lower than level 2.
For the joints of type 3 spray liquid tight chemical protective clothing, at least 1
chemical substance in Table 5 shall be selected for testing. The permeation performance
shall not be lower than level 3.
For the joints of type 4 liquid spray tight chemical protective clothing, at least 1
chemical substance in Table 5 shall be selected for testing. The permeation performance
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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