SY/T 0520-2008Viscosity determination of crude petroleum. Equilibrium method by rotational viscometer (English PDF)
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Issued by
China Textile Commerce Association
Level / Type
National · Recommended
Issue date
December 1, 2015
Implementation date
March 1, 2016
Scope
SY/T 0520-2008 (Viscosity determination of crude petroleum. Equilibrium method by rotational viscometer) is available as an English-translated PDF.
SY/T 0520-2008 — This standard specifies the terms and definitions, classification, grading and marking, technical requirements, testing methods, product descriptions and packaging of PM2.5 protective masks.
This standard applies to the mask used in daily life by the public to prevent PM2.5 inhalation. This standard neither apply to the masks used for protection of harmful gases and steam inhalation, nor apply to the masks used in anoxic environment, escape, fire, medical and other occupational purposes.
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Document preview — SY/T 0520-2008
National Standard of the People's Republic of China
- ICS
- 13.340.30
- Classification
- W 55
Issued by: China Textile Commerce Association
Contents
- Foreword...3
- 1 Scope...4
- 2 Normative references...4
- 3 Terms and definitions...5
- 4 Classification, grading and marking...7
- 5 Technical requirements...8
- 6 Detection method...10
- 7 Product description and packaging...13
- Appendix A (Informative) Guidance for selection and use...15
- Appendix B (Informative) Main dimensions of test head molds...16
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by China Textile Commerce Association.
This standard shall be under the jurisdiction of the China Textile Commerce
Association Safety & Health Protective Products Committee.
The main drafting organizations of this standard. Chinese Academy of Sciences
Urban Environment Study Institute, CAS-Best (Xiamen) Environmental
Technology Co., Ltd., Jiande Chaomei Daily Chemicals Co., Ltd, Zhejiang State
Inspection Technology (Jiangsu) Co., Ltd. Shanghai Gangkai Purifying
Products Co., Ltd., Jingzhou Strong Science and Technology Development Co.,
Ltd, Guangzhou Powecom Safety Goods Manufacturing Co., Ltd, Guangzhou
City Guanhua Labor Protection Products Co., Ltd., Xiamen High-tech Anti-static
Equipment Co., Ltd., Hubei Xianwanli Protective Products Co., Ltd.
1 Scope
This standard specifies the terms and definitions, classification, grading and
marking, technical requirements, testing methods, product descriptions and
packaging of PM2.5 protective masks.
This standard applies to the mask used in daily life by the public to prevent
PM2.5 inhalation.
This standard neither apply to the masks used for protection of harmful gases
and steam inhalation, nor apply to the masks used in anoxic environment,
escape, fire, medical and other occupational purposes.
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.
GBZ 1-2010 Hygienic standards for the design of industrial enterprises
GB 2626-2006 Respiratory protective equipment - Non-powered air-purifying
particle respirator
GB/T 2912.1 Textiles - Determination of formaldehyde - Part 1.Free and
hydrolyzed formaldehyde (water extraction method)
GB 3095-2012 Ambient air quality standard
GB/T 5703 Anthropometric basic items for technical design
GB/T 7573 Textiles - Determination of pH of aqueous extract
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Mist
It refers to the tiny droplets suspended in the air.
[GB/T 18664-2002, definition 3.1.18]
3.2
Haze
It refers to a kind of weather formed by the smoke suspended in the air.
3.3
Aerodynamic diameter
It refers to the diameter of the sphere of the unit density (rho0 = 1 g/cm3)
reaching to the final settlement velocity same as the actual particle when it
is in low Reynolds movement in the static air.
[HJ 653-2013, definition 3.1]
3.4
PM2.5
It refers to the particle in the ambient air for which the aerodynamic
equivalent diameter is less than or equal to 2.5 µm, AND it is also known as
fine particle.
[GB 3095-2012, definition 3.4]
4 Classification, grading and marking
4.1 Classification
Based on structures, the products are divided into disposable masks and
replaceable masks. Based on size, the products are divided into large (L),
medium (M) and small (S).
4.2 Grading
Based on the filtration efficiency, the products are divided into. grade 1 F95 >=
95%; grade 2 F90 >= 90%.
5 Technical requirements
5.1 General requirements
5.1.1 Materials
The material shall comply with the following requirements.
5.1.2 Structural design
Structural design shall comply with the following requirements.
5.1.3 Place of production
The hygiene of the production place of mask shall comply with the Chapter 6
basic hygienic requirements for the workplace of GBZ 1-2010 Hygienic
standards for the design of industrial enterprises.
5.2 Filter efficiency
The filter efficiency will be tested in accordance with the testing methods as
specified in 6.7 of this standard; AND the filter efficiency of each sample shall
always comply with the requirements of Table 2.
5.4 Respiratory resistance
USE the test method as specified in 6.9 of this standard to conduct testing, AND
the results shall comply with the requirements of Table 4.
5.5 Connection force between mask lace and main part
USE the method as specified in 6.10 of this standard to conduct test; when the
mask lace is withstanding 10N axial tensile force for 10s, it shall not be slipping
or fracture.
6 Detection method
6.1 Appearance inspection
Based on each technical requirement, before conducting the lab performance
test, it shall conduct visual appearance inspection against the sample. As for
the disposable mask and the replaceable mask, it respectively requires
inspecting 2 samples which are respectively subjected to temperature and
humidity pre-treatment, wherein.
6.2 Temperature and humidity pretreatment
FOLLOW the provisions of 6.2.1 in GB 2626-2006.
6.3 Formaldehyde
FOLLOW the provisions of GB/T 2912.1.The samples were not pretreated AND
the samples were sealed before storage.
6.6 Microbiological indicators
FOLLOW the provisions of Appendix B of GB 15979; before test, the sample
shall be sealed.
6.7 Filter efficiency
FOLLOW the provisions of 6.3 in GB 2626-2006.TAKE 15 disposable masks
or replaceable masks, including 10 untreated samples and 5 temperature and
humidity pretreatment samples.
6.8 Total inward leakage
FOLLOW the provisions of 6.4 in GB 2626-2006.TAKE 10 disposable masks
or replaceable masks, including 5 untreated samples and 5 temperature and
humidity pretreatment samples.
6.9 Respiratory resistance
Testing equipment shall comply with the requirements of 6.5.2 in GB 2626-2006.
As for the inspiratory resistance and expiratory resistance, respectively TAKE 4
samples, including 2 untreated samples and 2 temperature and humidity
pretreatment samples. The main dimensions of the test head mold shall refer
to the requirements of Appendix B, which is divided into large, medium and
small. It shall select appropriate head mold for test based on the model size as
indicated on the tested mask.
6.11 Dead space
FOLLOW the provisions of 6.9 in GB 2626-2006.TAKE 3 samples which are
not pre-treated.
7 Product description and packaging
7.1 Product description
The product description shall provide information that the user must know,
including.
7.2 Packaging
7.2.1 The sales packaging shall protect the product against mechanical
damage and contamination prior to use;
TAJ 1001-2015
AJ
ASSOCIATION STANDARD
OF CHINA TEXTILE COMMERCE ASSOCIATION
ICS 13.340.30
W 55
Registration number
PM2.5 protective mask
Issued on. DECEMBER 1, 2015
Implemented on. MARCH 1, 2016
Issued by. China Textile Commerce Association
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Terms and definitions... 5
4 Classification, grading and marking... 7
5 Technical requirements... 8
6 Detection method... 10
7 Product description and packaging... 13
Appendix A (Informative) Guidance for selection and use... 15
Appendix B (Informative) Main dimensions of test head molds... 16
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by China Textile Commerce Association.
This standard shall be under the jurisdiction of the China Textile Commerce
Association Safety & Health Protective Products Committee.
The main drafting organizations of this standard. Chinese Academy of Sciences
Urban Environment Study Institute, CAS-Best (Xiamen) Environmental
Technology Co., Ltd., Jiande Chaomei Daily Chemicals Co., Ltd, Zhejiang State
Inspection Technology (Jiangsu) Co., Ltd. Shanghai Gangkai Purifying
Products Co., Ltd., Jingzhou Strong Science and Technology Development Co.,
Ltd, Guangzhou Powecom Safety Goods Manufacturing Co., Ltd, Guangzhou
City Guanhua Labor Protection Products Co., Ltd., Xiamen High-tech Anti-static
Equipment Co., Ltd., Hubei Xianwanli Protective Products Co., Ltd.
1 Scope
This standard specifies the terms and definitions, classification, grading and
marking, technical requirements, testing methods, product descriptions and
packaging of PM2.5 protective masks.
This standard applies to the mask used in daily life by the public to prevent
PM2.5 inhalation.
This standard neither apply to the masks used for protection of harmful gases
and steam inhalation, nor apply to the masks used in anoxic environment,
escape, fire, medical and other occupational purposes.
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.
GBZ 1-2010 Hygienic standards for the design of industrial enterprises
GB 2626-2006 Respiratory protective equipment - Non-powered air-purifying
particle respirator
GB/T 2912.1 Textiles - Determination of formaldehyde - Part 1.Free and
hydrolyzed formaldehyde (water extraction method)
GB 3095-2012 Ambient air quality standard
GB/T 5703 Anthropometric basic items for technical design
GB/T 7573 Textiles - Determination of pH of aqueous extract
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Mist
It refers to the tiny droplets suspended in the air.
[GB/T 18664-2002, definition 3.1.18]
3.2
Haze
It refers to a kind of weather formed by the smoke suspended in the air.
3.3
Aerodynamic diameter
It refers to the diameter of the sphere of the unit density (rho0 = 1 g/cm3)
reaching to the final settlement velocity same as the actual particle when it
is in low Reynolds movement in the static air.
[HJ 653-2013, definition 3.1]
3.4
PM2.5
It refers to the particle in the ambient air for which the aerodynamic
equivalent diameter is less than or equal to 2.5 µm, AND it is also known as
fine particle.
[GB 3095-2012, definition 3.4]
4 Classification, grading and marking
4.1 Classification
Based on structures, the products are divided into disposable masks and
replaceable masks. Based on size, the products are divided into large (L),
medium (M) and small (S).
4.2 Grading
Based on the filtration efficiency, the products are divided into. grade 1 F95 >=
95%; grade 2 F90 >= 90%.
5 Technical requirements
5.1 General requirements
5.1.1 Materials
The material shall comply with the following requirements.
5.1.2 Structural design
Structural design shall comply with the following requirements.
5.1.3 Place of production
The hygiene of the production place of mask shall comply with the Chapter 6
basic hygienic requirements for the workplace of GBZ 1-2010 Hygienic
standards for the design of industrial enterprises.
5.2 Filter efficiency
The filter efficiency will be tested in accordance with the testing methods as
specified in 6.7 of this standard; AND the filter efficiency of each sample shall
always comply with the requirements of Table 2.
5.4 Respiratory resistance
USE the test method as specified in 6.9 of this standard to conduct testing, AND
the results shall comply with the requirements of Table 4.
5.5 Connection force between mask lace and main part
USE the method as specified in 6.10 of this standard to conduct test; when the
mask lace is withstanding 10N axial tensile force for 10s, it shall not be slipping
or fracture.
6 Detection method
6.1 Appearance inspection
Based on each technical requirement, before conducting the lab performance
test, it shall conduct visual appearance inspection against the sample. As for
the disposable mask and the replaceable mask, it respectively requires
inspecting 2 samples which are respectively subjected to temperature and
humidity pre-treatment, wherein.
6.2 Temperature and humidity pretreatment
FOLLOW the provisions of 6.2.1 in GB 2626-2006.
6.3 Formaldehyde
FOLLOW the provisions of GB/T 2912.1.The samples were not pretreated AND
the samples were sealed before storage.
6.6 Microbiological indicators
FOLLOW the provisions of Appendix B of GB 15979; before test, the sample
shall be sealed.
6.7 Filter efficiency
FOLLOW the provisions of 6.3 in GB 2626-2006.TAKE 15 disposable masks
or replaceable masks, including 10 untreated samples and 5 temperature and
humidity pretreatment samples.
6.8 Total inward leakage
FOLLOW the provisions of 6.4 in GB 2626-2006.TAKE 10 disposable masks
or replaceable masks, including 5 untreated samples and 5 temperature and
humidity pretreatment samples.
6.9 Respiratory resistance
Testing equipment shall comply with the requirements of 6.5.2 in GB 2626-2006.
As for the inspiratory resistance and expiratory resistance, respectively TAKE 4
samples, including 2 untreated samples and 2 temperature and humidity
pretreatment samples. The main dimensions of the test head mold shall refer
to the requirements of Appendix B, which is divided into large, medium and
small. It shall select appropriate head mold for test based on the model size as
indicated on the tested mask.
6.11 Dead space
FOLLOW the provisions of 6.9 in GB 2626-2006.TAKE 3 samples which are
not pre-treated.
7 Product description and packaging
7.1 Product description
The product description shall provide information that the user must know,
including.
7.2 Packaging
7.2.1 The sales packaging shall protect the product against mechanical
damage and contamination prior to use;
......
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 16 pages — is available in the English PDF.
Referenced standards
Normative references
- GB 2626-2006Respiratory protection - Non-powered air-purifying particle respirator
- GB/T 2912.1Textiles -- Determination of formaldehyde -- Part 1: Free and hydrolyzed formaldehyde (water extraction method)
- GB 3095-2012Ambient air quality standards
- GB/T 5703Basic human body measurements for technological design
- GB/T 7573Textiles - Determination of pH of aqueous extract
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Related Standards
GB 3095-2012 — Ambient air quality standards
GB/T 2912.1-2009 — Textiles -- Determination of formaldehyde -- Part 1: Free and hydrolyzed formaldehyde (water extraction method)
GB/T 5703-2023 — Basic human body measurements for technological design
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