GB/T 4796-2001 Classification and severity classification of environmental parameters for electrical and electronic products

This standard specifies the classification and severity classification of environmental parameters encountered by electrical and electronic products during transportation, storage, installation and use. GB/T 4796-2001 Classification and severity classification of environmental parameters for electrical and electronic products GB/T4796-2001 Standard download decompression password: www.bzxz.net

Ics 19. 040
National Standard of the People's Republic of China
GB/T4796--2001
Idt 1EC 60721-1;1990
Classification of environmental parameters and theirseverities of electric and electronic products2001-07.12Release
Xiaohua People's Republic
National and Mongolian Quality Supervision Inspection and Control General Post
2001-12-01Implementation
GB/T 4796-2001
TFC:Foreword
Referenced Standards
GB/T4795—2001
This standard is a revision of GB/T4795—1934. This standard adopts International Electrotechnical Commission IEC60721-1.1990 (2nd Edition) 3 Classification of environmental conditions Part 1, Environmental factors and their severity ratings and their severity classification 1: 1993, Amendment 2: 1995. This standard has the following differences from GB/T4796—1981: a) This standard adds the foreword and the standard; b) Chapter Definitions; this standard adds \Environmental parameters classification and \Environmental parameters classification and severity classification grudnvimnrnalpreirsadeveriliesc) This standard divides humidity into relative humidity and relative humidity, and grades the different severities. d) This standard is divided into: Air pressure: 20). 30.53.70.84.106.135kPak pressure 200.500.1000.50.2090kP
) Based on GB/T-796-1S84, this standard not only retains the classification of rainfall intensity, but also adds the classification of precipitation and ice and its severity classification.
f) Based on GB/T4796-1984, this standard adds the classification of heat and radiation and its intensity severity classification) Based on GB/T4716-1U94, this standard adds the classification of nitrogen, chlorine, hydrogen monoxide, hydrogen monoxide and other four gases in addition to the production process classification of light, gas, ore, gas, gas and gas. h) Based on GB14796-1281, this standard adds the classification of the severity of dust. i) This standard adds the classification of 9 types of contaminants such as engine oil, gear oil, viscous oil, etc.: GB/T 3/4796-1984.
The standard also adds the classification of external rebound energy and the degree of severity of mechanical components. The standard is revised: 1S5, and the magnetic field, light field, effect, signal, pressure and regular change, induction and transient are divided into charges, and the electromagnetic resistance is divided into these 7 types. The difference between this standard and [EC617211: 1000 (2nd edition) is: for the analysis of product natural environment conditions with GB/T 47799, 1. The product application environment conditions are also revised. The names of the series of standards are coordinated, and the name of this standard is "Classification of environmental parameters of electrical products and their severity classification". From the implementation of this standard, the National Machinery Industry Bureau proposed GB/T4796-1984. This standard is under the jurisdiction of the National Electrical Product Environmental Conditions and Environmental Test Standardization Technical Committee. The drafting unit of this standard: Guangzhou Electric Science Research Institute. The Chinese standard is mainly composed of Jie, Shui Bin, Chen Jie. This standard is entrusted to the National Electrical Product Environmental Conditions and Environmental Test Standardization Technical Committee for interpretation. GB/T 4796:2001
IEC Foreword
1) 1 The formal agreement on technical consultation is drawn up by the Technical Committee, which is composed of representatives of all the countries with a special interest in the subject. It creates a temporary basis for the international discussion of the subject as far as possible. 3) These resolutions or amendments are made available to the international working group in the form of standards and are accepted by the National Committees in this sense.) In order to promote international uniformity, all four committees adopt the publications, texts and standards recommended by C as national standards within the scope permitted by their national conditions. In the event of any inconsistency between the national standard and the IEC standard, it is necessary to clearly indicate in the national standard as far as possible.
This International Standard IEC 5021 was prepared by the IEC Technical Committee TC7s: Classification of Environmental Conditions. This standard TFC. (0721-=2nd edition replaces the 1981 first edition. The principles of this standard are based on the following documents: Six-month method
75 (CO) 57 and 57A
Voting report
75 (C0) 55
All voting information about this standard can be found in the working table friendly voting report. It should be emphasized that this standard is part of a series of standards that constitute the following topics. Environmental parameters and their severity (IEC60721-) Spontaneous combustion system conditions (IEC60721-23
Classification of environmental barriers and their severity (IEC6U21) GB/T 4796
is used to replace the first edition of IEC: 60721-1. It is a collection of environmental parameters and severities of IEC 60721-1, which is a collection of the environmental parameters and severities of the products during operation, installation and use. The standards are mainly about the classification of product resistance. The severity of the materials given in this standard is not applicable to the specified application. The detailed application guidelines in TEC607213 are followed by the National Technical Committee of the People's Republic of China in formulating environmental conditions for products in accordance with TEC60721-3. However, under certain circumstances, the product classification values ​​of TEC60721-3 are not applicable, and the selection of the values ​​recommended in the table of this standard should be carefully considered. 1
1 Yanhan
National Standard of the People's Republic of China
Classification of Environmental Parameters and Severity Classification of Electrical and Electronic Products
Ciassificatinn of cnvironmcntal parameters ind their severities of electric and cleetronic productsGB/T4796—2001
idf 1Ec 60721-1 1,1990
Generation GB/17061SBJ
This standard specifies the classification and main classification of environmental parameters to which electric and electronic products are subjected during transportation, storage, installation and use.
2 Referenced standards
The following standards are the referenced documents of this standard through their use in this standard. The relevant versions of this standard are valid at the time of publication of this standard. All references will be printed in order to discuss the possibility of using the latest version of the following standards for the various supervisory departments applying this standard: GB［2423.5-1995 Environmental testing of electric and electronic products Part 2: Test methods and guidelines for station tests Ea: Shock waves idIEC 6006822Y.1587)
G11/T 3835.1—2000
Electrical equipment for explosion gas circulation Part 1: General requirements (IEC60H079-1993) GB/T4707.1092 Thermal environment conditions for electrical core products, precipitation and wind (NE9C60721--2,19hR) G/T4758.6—1996 External environmental conditions for electrical and electronic product sockets: CE60721-3-6:1997) ISO2041:197E Vibration and shock Notes
3 Definitions
This standard uses the following definitions.
3. Environmental conditions iremluuliin
The physical, chemical and biological conditions to which the product is subjected within a certain period of time. Note: Environmental factors also include environmental conditions in nature and environmental factors generated by the product itself or externally. 3.2 Environmental factors refer to the physical, chemical or biological characteristics of environmental conditions (such as heat, vibration, etc.) formed by the product alone or in combination. 3.3 Environmental parameters - environmental factors describe one or more physical, chemical or biological characteristics of the environment (such as temperature, acceleration, etc.). For example, environmental factors only report the detailed parameters of the dynamic range (such as random, random acceleration, etc.). 3.4 Environmental stress severity sveriryufenvirunencalperemetc refers to the value of an environmental parameter. Example: the value of the acceleration (frequency>2) of the positive vibration severity is characterized. 3.5 Product application conditions plicaorodaplieon refers to the conditions or places where the product is used, such as factories, factories, and ground transportation. The application conditions have nothing to do with the type of product. Approved by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China in 200107-2, Implementation No. 212 GR/T 4796—2001 3.6 Environmental groups and their severity Kroupofenvronaentalparamelersnl tairseverities describe a group of environmental conditions that require a specific application or performance. 4 Environmental factors and parameters
4.1 Conditions
The actual environment of the product is determined by the design and is composed of the environmental factors and related environmental parameters. Therefore, when determining the environmental conditions for the application of a product, the following two points must be considered: List the environmental factors involved!
Select the appropriate parameters for each parameter: Under certain application conditions, the influence of the environment on the product is caused by the following reasons: 1. The surrounding medium conditions (in some cases, the platform is soil filling): 2. The structural conditions connected to the product:
3. The influence from the outside world.
Therefore, the environmental factors and their effects must be selected for the basic conditions of the product protection. When these conditions are out of specification, the impact of the external addiction to the garden will be checked individually, in combination, and in sequence.
The parameters used are consistent with the basic parameters used in (T312425), and the age plan should be as practical as possible. 4.2 List of individual environmental factors and their severity The list of environmental factors is used as a check guide to ensure that most of the relevant factors are taken into account and to achieve the uniformity of the environmental description.
The sample standards given in Table 1 according to the severity of each parameter are used It does not involve the severity of the product itself caused by stress. For example, the severity only involves the ambient pressure (such as air, water, soil, water vapor, ice, oil, etc.) and the temperature of the product structure, and does not involve the temperature of the hot spot of the product itself. This severity meter is related to the limited environmental conditions, that is, it does not include other basic measurement, calculation and other conditions. 4.3 Combined environmental factors
The product is exposed to the right environment and the corresponding environment at the same time. When the combined environment is in the base When the environmental factors have different effects on the product, the combined environmental effects are particularly important. Therefore, when selecting an environmental factor for a product, it is recommended to test the environmental factors and consider the environmental characteristics as much as possible. 4.4 Sequence of environmental factors The product is exposed to two or more parameters in sequence. Two important differences are: Heat shock: put the product after low temperature control to high temperature conditions, or put the product after high temperature control to dry water (rain, water jets). , waves, immersion) will form thermal shock! Freezing: Before or after the product is exposed to water other than the previous place, the net product is exposed to the environment below the freezing point, which will cause freezing. When determining the deterioration conditions under which the product will freeze, these factors should be considered. 2 Climate pollution 1.1 Environmental factors, environmental protection factors and units recommended by the environmental authority, temperature and humidity, 0R/T 4796, production base, freezing point of water ... 4h
Case light number (see note 3)
The degree of production is to be determined by the meteorological factors of the product
This severe single weather condition is located in the market
building (see [H/147HR.6)
For example, when the product is introduced from a medium called
outside) or when the product is exposed to water with different humidity (sunrise and rain), then the product effect is determined by the average temperature shock solution listed in
(air temperature, water) towel
for selection, which can be used as a single environmental factor, combined with the state foreign movement in
Miscellaneous item number
1.2 library
1- 3-
Environmental load, environmental
Safety and unit
Relative degree of mixing. Absolute degree,
6 Water volume
Complete air generation
G/T4796-2001
Table 1 (continued)
Severity degree
Part code (standard 2)
Thinking about the impact of the product on the current relative
Wet treatment and other external environment special data (big hair is to pay attention to the development of the store change group The combined film theory is derived from the weather type and other related original climate factors, environmental sources and location factors, five-way widening rate, kPa/G Open T4796--2001 (minutes) The movement of the product includes the movement of the surrounding external substances, the path, m, s =.5 Precipitation intensity, ntin/ouin intensity, kgm*+) intensity 1 solar radiation intensity, intensity.w/m2 sea and underwater radiation except rain, carbon water, amine water, water conditional substitution (see note 2) intensity refers to the weight of water dripping onto the surface of the water within a single period of time: this can be compared with the weight of water dripping onto the surface of the water during the period of time and kg/m2 = Applicable only to |tt||For the parts near the surface, see 4757.5
For the load caused by ice formation, see B/T4797 for the mutual specification of ice formation. Here, the thermal effect of internal radiation is taken into consideration, except for the wave-like effect
The product
is not required to produce the grade
Xu chain towel
The environmental network spot, environmental
multiple factors and units
water or semi-water
1. 9 Micro-composition
1.1 Ice and required chemical composition
Current concentration.nn/h
Current conditions
Special groups
3 Long-term properties (see 3)
Micro-cliff·ga
One chemical
According to concentration.mg/m
Oxygen
GD/T 4796—2007
Table 1 ()
Severity
(See Note)bzxZ.net
Item Code (See Note 3)
Currently no grade
Pregnant surface moisture No
Change severe source
No severe grade
Other non-productive
Acidity
Present left spray rodents or their animals, including not included, severe
For female gas and transport gas, see CB/T EB36.1
No parameters and capacity requirements are given in advance
Item number
Environmental flash spot, environmental
each teaching and unit
its chemical spot
find degree, mgm
concentration rugim
i agricultural official.mR/m
GB/T 47962001
Table 1 ()
Severe process
《See Note 1>
Tea specification number (see Note 2)
It is not expressed in terms of "equivalent value of oxidation effect6 Environmental factors and their severity levels describe a group of environmental factors that require a particular application or performance. 4 Environmental factors and parameters
4.1 Conditions
The actual environmental factors that the product is exposed to are the product's most realistic and consist of the environmental factors and related environmental parameters. Therefore, when determining the environmental conditions for a product application, the following two points must be considered: List the environmental factors involved!
One must select the appropriate severity level for each parameter: Under certain application conditions, the impact of the environment on the product is caused by the following reasons: 1. The surrounding medium conditions (in some cases, the platform is soil filling): 2. The structural conditions connected to the product:
3. The influence from the outside world.
Therefore, the environmental factors and their effects must be selected for the basic conditions of the product protection. When these conditions are out of specification, the impact of the external addiction to the garden will be checked individually, in combination, and in sequence.
The parameters used are consistent with the basic parameters used in (T312425), and the age plan should be as practical as possible. 4.2 List of individual environmental factors and their severity The list of environmental factors is used as a check guide to ensure that most of the relevant factors are taken into account and to achieve the uniformity of the environmental description.
The sample standards given in Table 1 according to the severity of each parameter are used It does not involve the severity of the product itself caused by stress. For example, the severity only involves the ambient pressure (such as air, water, soil, water vapor, ice, oil, etc.) and the temperature of the product structure, and does not involve the temperature of the hot spot of the product itself. This severity meter is related to the limited environmental conditions, that is, it does not include other basic measurement, calculation and other conditions. 4.3 Combined environmental factors
The product is exposed to the right environment and the corresponding environment at the same time. When the combined environment is in the base When the environmental factors have different effects on the product, the combined environmental effects are particularly important. Therefore, when selecting an environmental factor for a product, it is recommended to test the environmental factors and consider the environmental characteristics as much as possible. 4.4 Sequence of environmental factors The product is exposed to two or more parameters in sequence. Two important differences are: Heat shock: put the product after low temperature control to high temperature conditions, or put the product after high temperature control to dry water (rain, water jets). , waves, immersion) will form thermal shock! Freezing: Before or after the product is exposed to water other than the previous place, the net product is exposed to the environment below the freezing point, which will cause freezing. When determining the deterioration conditions under which the product will freeze, these factors should be considered. 2 Climate pollution 1.1 Environmental factors, environmental protection factors and units recommended by the environmental authority, temperature and humidity, 0R/T 4796, production base, freezing point of water ... 4h
Case light number (see note 3)
The degree of production is to be determined by the meteorological factors of the product
This severe single weather condition is located in the market
building (see [H/147HR.6)
For example, when the product is introduced from a medium called
outside) or when the product is exposed to water with different humidity (sunrise and rain), then the product effect is determined by the average temperature shock solution listed in
(air temperature, water) towel
for selection, which can be used as a single environmental factor, combined with the state foreign movement in
Miscellaneous item number
1.2 library
1- 3-
Environmental load, environmental
Safety and unit
Relative degree of mixing. Absolute degree,
6 Water volume
Complete air generation
G/T4796-2001
Table 1 (continued)
Severity degree
Part code (standard 2)
Thinking about the impact of the product on the current relative
Wet treatment and other external environment special data (big hair is to pay attention to the development of the store change group The combined film theory is derived from the weather type and other related original climate factors, environmental sources and location factors, five-way widening rate, kPa/G Open T4796--2001 (minutes) The movement of the product includes the movement of the surrounding external substances, the path, m, s =.5 Precipitation intensity, ntin/ouin intensity, kgm*+) intensity 1 solar radiation intensity, intensity.w/m2 sea and underwater radiation except rain, carbon water, amine water, water conditional substitution (see note 2) intensity refers to the weight of water dripping onto the surface of the water within a single period of time: this can be compared with the weight of water dripping onto the surface of the water during the period of time and kg/m2 = Applicable only to |tt||For the parts near the surface, see 4757.5
For the load caused by ice formation, see B/T4797 for the mutual specification of ice formation. Here, the thermal effect of internal radiation is taken into consideration, except for the wave-like effect
The product
is not required to produce the grade
Xu chain towel
The environmental network spot, environmental
multiple factors and units
water or semi-water
1. 9 Micro-composition
1.1 Ice and required chemical composition
Current concentration.nn/h
Current conditions
Special groups
3 Long-term properties (see 3)
Micro-cliff·ga
One chemical
According to concentration.mg/m
Oxygen
GD/T 4796—2007
Table 1 ()
Severity
(See Note)
Item Code (See Note 3)
Currently no grade
Pregnant surface moisture No
Change severe source
No severe grade
Other non-productive
Acidity
Present left spray rodents or their animals, including not included, severe
For female gas and transport gas, see CB/T EB36.1
No parameters and capacity requirements are given in advance
Item number
Environmental flash spot, environmental
each teaching and unit
its chemical spot
find degree, mgm
concentration rugim
i agricultural official.mR/m
GB/T 47962001
Table 1 ()
Severe process
《See Note 1>
Tea specification number (see Note 2)
It is not expressed in terms of "equivalent value of oxidation effect6 Environmental factors and their severity levels describe a group of environmental factors that require a particular application or performance. 4 Environmental factors and parameters
4.1 Conditions
The actual environmental factors that the product is exposed to are the product's most realistic and consist of the environmental factors and related environmental parameters. Therefore, when determining the environmental conditions for a product application, the following two points must be considered: List the environmental factors involved!
One must select the appropriate severity level for each parameter: Under certain application conditions, the impact of the environment on the product is caused by the following reasons: 1. The surrounding medium conditions (in some cases, the platform is soil filling): 2. The structural conditions connected to the product:
3. The influence from the outside world.
Therefore, the environmental factors and their effects must be selected for the basic conditions of the product protection. When these conditions are out of specification, the impact of the external addiction to the garden will be checked individually, in combination, and in sequence.
The parameters used are consistent with the basic parameters used in (T312425), and the age plan should be as practical as possible. 4.2 List of individual environmental factors and their severity The list of environmental factors is used as a check guide to ensure that most of the relevant factors are taken into account and to achieve the uniformity of the environmental description.
The sample standards given in Table 1 according to the severity of each parameter are used It does not involve the severity of the product itself caused by stress. For example, the severity only involves the ambient pressure (such as air, water, soil, water vapor, ice, oil, etc.) and the temperature of the product structure, and does not involve the temperature of the hot spot of the product itself. This severity meter is related to the limited environmental conditions, that is, it does not include other basic measurement, calculation and other conditions. 4.3 Combined environmental factors
The product is exposed to the right environment and the corresponding environment at the same time. When the combined environment is in the base When the environmental factors have different effects on the product, the combined environmental effects are particularly important. Therefore, when selecting an environmental factor for a product, it is recommended to test the environmental factors and consider the environmental characteristics as much as possible. 4.4 Sequence of environmental factors The product is exposed to two or more parameters in sequence. Two important differences are: Heat shock: put the product after low temperature control to high temperature conditions, or put the product after high temperature control to dry water (rain, water jets). , waves, immersion) will form thermal shock! Freezing: Before or after the product is exposed to water other than the previous place, the net product is exposed to the environment below the freezing point, which will cause freezing. When determining the deterioration conditions under which the product will freeze, these factors should be considered. 2 Climate pollution 1.1 Environmental factors, environmental protection factors and units recommended by the environmental authority, temperature and humidity, 0R/T 4796, production base, freezing point of water ... 4h
Case light number (see note 3)
The degree of production is to be determined by the meteorological factors of the product
This severe single weather condition is located in the market
building (see [H/147HR.6)
For example, when the product is introduced from a medium called
outside) or when the product is exposed to water with different humidity (sunrise and rain), then the product effect is determined by the average temperature shock solution listed in
(air temperature, water) towel
for selection, which can be used as a single environmental factor, combined with the state foreign movement in
Miscellaneous item number
1.2 library
1- 3-
Environmental load, environmental
Safety and unit
Relative degree of mixing. Absolute degree,
6 Water volume
Complete air generation
G/T4796-2001
Table 1 (continued)
Severity degree
Part code (standard 2)
Thinking about the impact of the product on the current relative
Wet treatment and other external environment special data (big hair is to pay attention to the development of the store change group The combined film theory is derived from the weather type and other related original climate factors, environmental sources and location factors, five-way widening rate, kPa/G Open T4796--2001 (minutes) The movement of the product includes the movement of the surrounding external substances, the path, m, s =.5 Precipitation intensity, ntin/ouin intensity, kgm*+) intensity 1 solar radiation intensity, intensity.w/m2 sea and underwater radiation except rain, carbon water, amine water, water conditional substitution (see note 2) intensity refers to the weight of water dripping onto the surface of the water within a single period of time: this can be compared with the weight of water dripping onto the surface of the water during the period of time and kg/m2 = Applicable only to |tt||For the parts near the surface, see 4757.5
For the load caused by ice formation, see B/T4797 for the mutual specification of ice formation. Here, the thermal effect of internal radiation is taken into consideration, except for the wave-like effect
The product
is not required to produce the grade
Xu chain towel
The environmental network spot, environmental
multiple factors and units
water or semi-water
1. 9 Micro-composition
1.1 Ice and required chemical composition
Current concentration.nn/h
Current conditions
Special groups
3 Long-term properties (see 3)
Micro-cliff·ga
One chemical
According to concentration.mg/m
Oxygen
GD/T 4796—2007
Table 1 ()
Severity
(See Note)
Item Code (See Note 3)
Currently no grade
Pregnant surface moisture No
Change severe source
No severe grade
Other non-productive
Acidity
Present left spray rodents or their animals, including not included, severe
For female gas and transport gas, see CB/T EB36.1
No parameters and capacity requirements are given in advance
Item number
Environmental flash spot, environmental
each teaching and unit
its chemical spot
find degree, mgm
concentration rugim
i agricultural official.mR/m
GB/T 47962001
Table 1 ()
Severe process
《See Note 1>
Tea specification number (see Note 2)
It is not expressed in terms of "equivalent value of oxidation effect2 List of individual environmental factors and their severity The list of environmental factors is used as a checklist to ensure that most of the relevant factors are taken into account and to achieve uniformity in the environmental description. Table 1 only uses the severity levels given for each parameter to classify the severity of the product to which it may be subjected.
It does not involve the severity caused by the stress of the product itself. For example, the severity only involves the temperature of the surrounding medium (such as air, water, soil, water vapor, ice, oil, etc.) and the temperature of the structure connected to the product, but does not involve the temperature of the hot spot of the product itself. This severity level is not related to the limited environmental conditions, that is, it does not include other basic measurement, calculation and other conditions. 4.3 Combined environmental factors
The product is exposed to the right environment and related conditions at the same time. When the combination of environmental factors and the same series of environmental factors have different effects on the product, the influence of the combined environment is particularly important. Therefore, when selecting environmental factors for a certain product, it is recommended to test the environmental factors and try to consider the environmental factors as much as possible.
4.4 Items not included in the environmental factor test
The impact of product environmental factors on the product performance is particularly important. Two important differences in the results of exposure to two or more parameters in sequence are:
Thermal shock: placing the product after low temperature exposure to high temperature conditions, or directly exposing the product after high temperature exposure to water (rain, water jets, sea waves, immersion) will cause thermal shock! Freezing: before or after the product is exposed to zero dew, mixed air, rain or other water other than the previous place, the net product is exposed to ice In an environment below 100 °C, freezing may occur. When determining the conditions under which a fruit product will freeze, these factors should be considered. 2 Climate Factors 1.1 Environmental Factors, Environmental Factors, Recommended Numbers and Units, Health and Safety Index, Temperature and Air Temperature Index 0R/T 4796 Egg Production Base 1> Freezing Point of Water—36-120 °C 4h
Case light number (see note 3)
The degree of production is to be determined by the meteorological factors of the product
This severe single weather condition is located in the market
building (see [H/147HR.6)
For example, when the product is introduced from a medium called
outside) or when the product is exposed to water with different humidity (sunrise and rain), then the product effect is determined by the average temperature shock solution listed in
(air temperature, water) towel
for selection, which can be used as a single environmental factor, combined with the state foreign movement in
Miscellaneous item number
1.2 library
1- 3-
Environmental load, environmental
Safety and unit
Relative degree of mixing. Absolute degree,
6 Water volume
Complete air generation
G/T4796-2001
Table 1 (continued)
Severity degree
Part code (standard 2)
Thinking about the impact of the product on the current relative
Wet treatment and other external environment special data (big hair is to pay attention to the development of the store change group The combined film theory is derived from the weather type and other related original climate factors, environmental sources and location factors, five-way widening rate, kPa/G Open T4796--2001 (minutes) The movement of the product includes the movement of the surrounding external substances, the path, m, s =.5 Precipitation intensity, ntin/ouin intensity, kgm*+) intensity 1 solar radiation intensity, intensity.w/m2 sea and underwater radiation except rain, carbon water, amine water, water conditional substitution (see note 2) intensity refers to the weight of water dripping onto the surface of the water within a single period of time: this can be compared with the weight of water dripping onto the surface of the water during the period of time and kg/m2 = Applicable only to |tt||For the parts near the surface, see 4757.5
For the load caused by ice formation, see B/T4797 for the mutual specification of ice formation. Here, the thermal effect of internal radiation is taken into consideration, except for the wave-like effect
The product
is not required to produce the grade
Xu chain towel
The environmental network spot, environmental
multiple factors and units
water or semi-water
1. 9 Micro-composition
1.1 Ice and required chemical composition
Current concentration.nn/h
Current conditions
Special groups
3 Long-term properties (see 3)
Micro-cliff·ga
One chemical
According to concentration.mg/m
Oxygen
GD/T 4796—2007
Table 1 ()
Severity
(See Note)
Item Code (See Note 3)
Currently no grade
Pregnant surface moisture No
Change severe source
No severe grade
Other non-productive
Acidity
Present left spray rodents or their animals, including not included, severe
For female gas and transport gas, see CB/T EB36.1
No parameters and capacity requirements are given in advance
Item number
Environmental flash spot, environmental
each teaching and unit
its chemical spot
find degree, mgm
concentration rugim
i agricultural official.mR/m
GB/T 47962001
Table 1 ()
Severe process
《See Note 1>
Tea specification number (see Note 2)
It is not expressed in terms of "equivalent value of oxidation effect2 List of individual environmental factors and their severity The list of environmental factors is used as a checklist to ensure that most of the relevant factors are taken into account and to achieve uniformity in the environmental description. Table 1 only uses the severity levels given for each parameter to classify the severity of the product to which it may be subjected.
It does not involve the severity caused by the stress of the product itself. For example, the severity only involves the temperature of the surrounding medium (such as air, water, soil, water vapor, ice, oil, etc.) and the temperature of the structure connected to the product, but does not involve the temperature of the hot spot of the product itself. This severity level is not related to the limited environmental conditions, that is, it does not include other basic measurement, calculation and other conditions. 4.3 Combined environmental factors
The product is exposed to the right environment and related conditions at the same time. When the combination of environmental factors and the same series of environmental factors have different effects on the product, the influence of the combined environment is particularly important. Therefore, when selecting environmental factors for a certain product, it is recommended to test the environmental factors and try to consider the environmental factors as much as possible.
4.4 Items not included in the environmental factor test
The impact of product environmental factors on the product performance is particularly important. Two important differences in the results of exposure to two or more parameters in sequence are:
Thermal shock: placing the product after low temperature exposure to high temperature conditions, or directly exposing the product after high temperature exposure to water (rain, water jets, sea waves, immersion) will cause thermal shock! Freezing: before or after the product is exposed to zero dew, mixed air, rain or other water other than the previous place, the net product is exposed to ice In an environment below 100 °C, freezing may occur. When determining the conditions under which a fruit product will freeze, these factors should be considered. 2 Climate Factors 1.1 Environmental Factors, Environmental Factors, Recommended Numbers and Units, Health and Safety Index, Temperature and Air Temperature Index 0R/T 4796 Egg Production Base 1> Freezing Point of Water—36-120 °C 4h
Case light number (see note 3)
The degree of production is to be determined by the meteorological factors of the product
This severe single weather condition is located in the market
building (see [H/147HR.6)
For example, when the product is introduced from a medium called
outside) or when the product is exposed to water with different humidity (sunrise and rain), then the product effect is determined by the average temperature shock solution listed in
(air temperature, water) towel
for selection, which can be used as a single environmental factor, combined with the state foreign movement in
Miscellaneous item number
1.2 library
1- 3-
Environmental load, environmental
Safety and unit
Relative degree of mixing. Absolute degree,
6 Water volume
Complete air generation
G/T4796-2001
Table 1 (continued)
Severity degree
Part code (standard 2)
Thinking about the impact of the product on the current relative
Wet treatment and other external environment special data (big hair is to pay attention to the development of the store change group The combined film theory is derived from the weather type and other related original climate factors, environmental sources and location factors, five-way widening rate, kPa/G Open T4796--2001 (minutes) The movement of the product includes the movement of the surrounding external substances, the path, m, s =.5 Precipitation intensity, ntin/ouin intensity, kgm*+) intensity 1 solar radiation intensity, intensity.w/m2 sea and underwater radiation except rain, carbon water, amine water, water conditional substitution (see note 2) intensity refers to the weight of water dripping onto the surface of the water within a single period of time: this can be compared with the weight of water dripping onto the surface of the water during the period of time and kg/m2 = Applicable only to |tt||For the parts near the surface, see 4757.5
For the load caused by ice formation, see B/T4797 for the mutual specification of ice formation. Here, the thermal effect of internal radiation is taken into consideration, except for the wave-like effect
The product
is not required to produce the grade
Xu chain towel
The environmental network spot, environmental
multiple factors and units
water or semi-water
1. 9 Micro-composition
1.1 Ice and required chemical composition
Current concentration.nn/h
Current conditions
Special groups
3 Long-term properties (see 3)
Micro-cliff·ga
One chemical
According to concentration.mg/m
Oxygen
GD/T 4796—2007
Table 1 ()
Severity
(See Note)
Item Code (See Note 3)
Currently no grade
Pregnant surface moisture No
Change severe source
No severe grade
Other non-productive
Acidity
Present left spray rodents or their animals, including not included, severe
For female gas and transport gas, see CB/T EB36.1
No parameters and capacity requirements are given in advance
Item number
Environmental flash spot, environmental
each teaching and unit
its chemical spot
find degree, mgm
concentration rugim
i agricultural official.mR/m
GB/T 47962001
Table 1 ()
Severe process
《See Note 1>
Tea specification number (see Note 2)
It is not expressed in terms of "equivalent value of oxidation effect6) For example, when the product is exposed to a medium with different humidity (sun, rain, etc.), or when the product is exposed to water, the product's performance after the shock is determined by the average temperature (air, water) listed in the table. The product can be used as a single environmental factor and combined with the state of the state in the miscellaneous model number 1.2.
Environmental load, environmental
Safety and unit
Relative degree of mixing. Absolute degree,
6 Water volume
Complete air generation
G/T4796-2001
Table 1 (continued)
Severity degree
Part code (standard 2)
Thinking about the impact of the product on the current relative
Wet treatment and other external environment special data (big hair is to pay attention to the development of the store change group The combined film theory is derived from the weather type and other related original climate factors, environmental sources and location factors, five-way widening rate, kPa/G Open T4796--2001 (minutes) The movement of the product includes the movement of the surrounding external substances, the path, m, s =.5 Precipitation intensity, ntin/ouin intensity, kgm*+) intensity 1 solar radiation intensity, intensity.w/m2 sea and underwater radiation except rain, carbon water, amine water, water conditional substitution (see note 2) intensity refers to the weight of water dripping onto the surface of the water within a single period of time: this can be compared with the weight of water dripping onto the surface of the water during the period of time and kg/m2 = Applicable only to |tt||For the parts near the surface, see 4757.5
For the load caused by ice formation, see B/T4797 for the mutual specification of ice formation. Here, the thermal effect of internal radiation is taken into consideration, except for the wave-like effect
The product
is not required to produce the grade
Xu chain towel
The environmental network spot, environmental
multiple factors and units
water or semi-water
1. 9 Micro-composition
1.1 Ice and required chemical composition
Current concentration.nn/h
Current conditions
Special groups
3 Long-term properties (see 3)
Micro-cliff·ga
One chemical
According to concentration.mg/m
Oxygen
GD/T 4796—2007
Table 1 ()
Severity
(See Note)
Item Code (See Note 3)
Currently no grade
Pregnant surface moisture No
Change severe source
No severe grade
Other non-productive
Acidity
Present left spray rodents or their animals, including not included, severe
For female gas and transport gas, see CB/T EB36.1
No parameters and capacity requirements are given in advance
Item number
Environmental flash spot, environmental
each teaching and unit
its chemical spot
find degree, mgm
concentration rugim
i agricultural official.mR/m
GB/T 47962001
Table 1 ()
Severe process
《See Note 1>
Tea specification number (see Note 2)
It is not expressed in terms of "equivalent value of oxidation effect6) For example, when the product is exposed to a medium with different humidity (sun, rain, etc.), or when the product is exposed to water, the product's performance after the shock is determined by the average temperature (air, water) listed in the table. The product can be used as a single environmental factor and combined with the state of the state in the miscellaneous model number 1.2.
Environmental load, environmental
Safety and unit
Relative degree of mixing. Absolute degree,
6 Water volume
Complete air generation
G/T4796-2001
Table 1 (continued)
Severity degree
Part code (standard 2)
Thinking about the impact of the product on the current relative
Wet treatment and other external environment special data (big hair is to pay attention to the development of the store change group The combined film theory is derived from the weather type and other related original climate factors, environmental sources and location factors, five-way widening rate, kPa/G Open T4796--2001 (minutes) The movement of the product includes the movement of the surrounding external substances, the path, m, s =.5 Precipitation intensity, ntin/ouin intensity, kgm*+) intensity 1 solar radiation intensity, intensity.w/m2 sea and underwater radiation except rain, carbon water, amine water, water conditional substitution (see note 2) intensity refers to the weight of water dripping onto the surface of the water within a single period of time: this can be compared with the weight of water dripping onto the surface of the water during the period of time and kg/m2 = Applicable only to |tt||For the parts near the surface, see 4757.5
For the load caused by ice formation, see B/T4797 for the mutual specification of ice formation. Here, the thermal effect of internal radiation is taken into consideration, except for the wave-like effect
The product
is not required to produce the grade
Xu chain towel
The environmental network spot, environmental
multiple factors and units
water or semi-water
1. 9 Micro-composition
1.1 Ice and required chemical composition
Current concentration.nn/h
Current conditions
Special groups
3 Long-term properties (see 3)
Micro-cliff·ga
One chemical
According to concentration.mg/m
Oxygen
GD/T 4796—2007
Table 1 ()
Severity
(See Note)
Item Code (See Note 3)
Currently no grade
Pregnant surface moisture No
Change severe source
No severe grade
Other non-productive
Acidity
Present left spray rodents or their animals, including not included, severe
For female gas and transport gas, see CB/T EB36.1
No parameters and capacity requirements are given in advance
Item number
Environmental flash spot, environmental
each teaching and unit
its chemical spot
find degree, mgm
concentration rugim
i agricultural official.mR/m
GB/T 47962001
Table 1 ()
Severe process
《See Note 1>
Tea specification number (see Note 2)
It is not expressed in terms of "equivalent value of oxidation effect
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