GB 24540-2009 English PDF (GB24540-2009)

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GB 24540-2009: Protective clothing -- Protective clothing against liquid acids and alkalis
GB 24540-2009
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 13.340.10
C 73
Personal Clothing -
Protective Clothing against Liquid Acids and Alkalis
ISSUED ON: OCTOBER 30, 2009
IMPLEMENTED ON: SEPTEMBER 01, 2010
Issued by: General Administration of Quality Supervision, Inspection
and Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Terms and Definitions ... 5
4 Grading ... 6
5 Technical Requirements ... 6
6 Test Methods ... 10
7 Inspection Rules ... 12
8 Marking ... 13
Appendix A (Normative) Test Methods for Penetration Time of Fabric Protective
Clothing against Liquid Acids and Alkalis ... 15
Appendix B (Normative) Test Methods for Permeation Time of Non-Fabric
Protective Clothing against Liquid Acids and Alkalis – Concentration Method
... 17
Appendix C (Normative) Test Methods for Non-Fabric Protective Clothing
against Liquid Acids and Alkalis – Indicator Method ... 19
Appendix D (Normative) Test Methods for Liquid-Repellence Efficiency ... 20
Appendix E (Normative) Test Methods for Hydrostatic Pressure Resistance 24
Appendix F (Normative) Test Methods for Strength Decline Rate of Fabric
Protective Clothing against Liquid Acids and Alkalis ... 26
Appendix G (Normative) Test Methods for Strength Decline Rate of Non-Fabric
Protective Clothing against Liquid Acids and Alkalis ... 28
Appendix H (Normative) Test Methods for Seam Breaking Strength ... 29
Appendix I (Informative) Test Methods for Spray Liquid Tightness ... 30
Appendix J (Informative) Test Methods for Jet Liquid Tightness ... 33
Appendix K (Normative) Washing Methods ... 35
Appendix L (Normative) List of Reagents ... 36
Bibliography ... 37
Personal Clothing -
Protective Clothing against Liquid Acids and Alkalis
1 Scope
This Standard specifies the grading, technical requirements, test methods, inspection
rules and marking of protective clothing against liquid acids and alkalis.
This Standard is applicable to protective clothing against liquid acids and alkalis used
by operators in industrial workplaces.
This Standard is not applicable to protective clothing against liquid acids and alkalis
used in fire-fighting, emergency rescue and other workplaces.
This Standard is not applicable to protective clothing against hydrofluoric acid,
ammonia, organic acids and alkalis.
NOTE: The protection objects of products covered by this Standard are liquid acids and alkalis;
but this Standard cannot cover the protection against all liquid acids and alkalis. Users shall
combine the protection performance data provided by the manufacturer according to the actual
situation on site to choose appropriate protective equipment by referring to relevant selection
and preparation standards.
2 Normative References
The provisions in following documents become the provisions of this Standard through
reference in this Standard. For dated references, the subsequent amendments
(excluding corrigendum) or revisions do not apply to this Standard, however, parties
who reach an agreement based on this Standard are encouraged to study if the latest
versions of these documents are applicable. For undated references, the latest edition
of the referenced document applies.
GB/T 2912.1-1998 Textiles - Determination of Formaldehyde - Part 1: Free and
Hydrolyzed Formaldehyde (Water Extraction Method) (eqv ISO 14184-1:1997)
GB/T 3917.3-1997 Textiles - Tear Properties Fabrics - Part 3: Determination of
Tear Force of Trapezoidal Shaped Test Specimens (eqv ISO 9073-4:1984)
GB/T 3920-2008 Textiles - Tests for Color Fastness - Color Fastness to Rubbing
(ISO 105-X12:2001, MOD)
GB/T 3923.1-1997 Textiles - Tensile Properties of Fabrics - Part 1: Determination
pinholes or defects.
3.5 Permeation
The process of chemical molecules passing through the protective clothing, including
the process of the adsorption of chemical molecules by the clothing material, the
diffusion in the clothing material, and the desorption from the other side of the clothing
material.
4 Grading
Fabric protective clothing is divided into Grade-I, Grade-II and Grade-III according to
penetration time and liquid static pressure resistance; non-fabric protective clothing is
divided into Grade-I, Grade-II and Grade-III according to penetration time. Among them,
the protection performance of the Grade-I is the lowest; and the protection
performance of the Grade-III is the highest. The lowest level among the grading
conditions is taken as the protection level.
5 Technical Requirements
5.1 General requirements
5.1.1 The structure of the clothing shall be conducive to the safety and hygiene of the
wearer. The materials in direct contact with the skin shall be free of skin irritation or
other harmful health effects, and shall not affect the normal physiological requirements
of the human body.
5.1.2 The clothing shall be easy to put on and take off and facilitate physical activities
during operation.
5.1.3 Jacket of the two-piece protective clothing shall be "neckline tight, cuffs tight and
hem tight"; while the pants shall be straight pants (see Figure 1 for schematic diagram).
One-piece protective clothing shall be "neckline tight, cuffs tight, bottom of pants tight"
(see Figure 2 for schematic diagram). The clothing shall be as light as possible and
easy to act and easy to put on and take off.
5.1.4 The joint portions of the protective clothing shall be tight and reasonable to
prevent intrusion of acids and alkalis; the structure of the protective clothing shall be
considered for use with other protective equipment, such as jacket sleeves and
protective gloves, pants and protective shoes (boots), the joint parts of which shall be
tight and reasonable to prevent intrusion of acids and alkalis.
5.1.5 There shall be no patch pockets and other structures on the clothing that can
store acids and alkalis, but there may be inside pockets.
6.5 Seam breaking strength
The seam breaking strength shall be tested according to Appendix H.
6.6 Spray liquid tightness
The spray liquid tightness shall be tested according to Appendix I.
6.7 Jet liquid tightness
The jet liquid tightness shall be tested according to Appendix J.
6.8 Wear resistance
The non-fabric protective clothing against liquid acids and alkalis shall be tested
according to 4.3.1 in AQ 6102-2007.
6.9 Flexibility resistance
The non-fabric protective clothing against liquid acids and alkalis shall be tested
according to Method-A in GB/T 12586-2003.
6.10 Puncture resistance
The non-fabric protective clothing against liquid acids and alkalis shall be tested
according to GB/T 20655-2006.
6.11 Breaking strength and tearing strength
The breaking strength and tearing strength of the fabric protective clothing against
liquid acids and alkalis shall be tested according to GB/T 3923.1-1997; while the
tearing strength shall be tested according to GB/T 3917.3-1997. The breaking strength
of the non-fabric protective clothing against liquid acids and alkalis shall be tested
according to HG/T 2580-1994.
6.12 Color fastness to dry rubbing
The fabric protective clothing against liquid acids and alkalis shall be tested according
to GB/T 3920-2008.
6.13 Formaldehyde content
The fabric protective clothing against liquid acids and alkalis shall be tested according
to GB/T 2912.1-1998.
6.14 pH value
The fabric protec...