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GB/T 4797.6-2013: Classification of environmental conditions -- Environmental conditions appearing in nature -- Dust, sand, salt mist
Status: Valid GB/T 4797.6: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 4797.6-2013 | English | 559 |
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Classification of environmental conditions -- Environmental conditions appearing in nature -- Dust, sand, salt mist
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GB/T 4797.6-2013
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| GB/T 4797.6-1995 | English | 799 |
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Environmental conditions appearing in nature for electric and electronic products. Dust, sand, salt mist
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GB/T 4797.6-1995
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PDF similar to GB/T 4797.6-2013
Basic data | Standard ID | GB/T 4797.6-2013 (GB/T4797.6-2013) | | Description (Translated English) | Classification of environmental conditions -- Environmental conditions appearing in nature -- Dust, sand, salt mist | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | A21 | | Classification of International Standard | 19.020 | | Word Count Estimation | 24,259 | | Older Standard (superseded by this standard) | GB/T 4797.6-1995 | | Quoted Standard | GB/T 4797.5; GB/T 10593.2-2012; ISO 9225-2012 | | Adopted Standard | IEC 60721-2-5-1991, MOD | | Regulation (derived from) | National Standards Bulletin No. 22 of 2013 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the dust, sand, salt spray characteristics occur in nature, as well as the impact of these environmental factors on the storage, transport and use of exposure during one of the products. Although the impact of these environmental f | GB/T 4797.6-2013: Classification of environmental conditions -- Environmental conditions appearing in nature -- Dust, sand, salt mist
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Classification of environmental conditions - Environmental conditions appearing in nature - Dust, sand, salt mist
ICS 19.020
A21
National Standards of People's Republic of China
Replacing GB/T 4797.6-1995
Classification of environmental conditions of the natural environment conditions
Dust, sand, salt spray
Environmentalconditionsappearinginnature-Dust, sand, saltmist
(IEC 60721-2-5.1991, Classificationofenvironmentalconditions-Part 2.
Environmentalconditionsappearinginnature-Section5. Dust, sand, saltmist, MOD)
Issued on. 2013-11-12
2014-03-07 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Table of Contents
Introduction Ⅲ
1 Scope 1
2 Normative references 1
3 Dust, sand, salt mist affect the product 1
4 dust and sand Natural Environment 1
4.1 Classification of dust and sand 1
Type and characteristics of dust 4.2 2
Factors that affect dust environment 4.3 5
5 blinds closed box and field dust 8
5.1 Dust features 8
5.2 Factors Affecting dust environment 9
9 6 Salt
6.1 salt spray characteristics 9
Factors that affect spray environment 12 6.2
Salt fog saline areas 7 13
13 7.1 Distribution of Saline Soil
Saline soil salinity 7.2 Composition 14
7.3 salt dust cloud formation and influence 14
Examples Appendix A (informative) dust concentration varies with height 15
Annex B (informative) movement of dust in the gas stream 16
Annex C (informative) sea salt spray particles to land transport and distribution 19
Foreword
GB/T 4797 standard is currently divided into eight sections.
--- GB/T 4797.1 electric and electronic products natural environmental conditions of temperature and humidity;
--- GB/T 4797.2 electric and electronic products natural environmental conditions Altitude and air pressure, water depth and water pressure;
--- GB/T 4797.3 electric and electronic products biological natural environmental conditions;
--- GB/T 4797.4 electric and electronic products and natural conditions of solar radiation temperature;
--- GB/T 4797.5 electric and electronic products Classification of environmental conditions of the natural environment precipitation and wind conditions;
--- GB/T 4797.6 Classification of environmental conditions natural conditions of dust, sand, salt spray;
--- GB/T 4797.7 electric and electronic products Classification of environmental conditions natural environment earthquake vibration and shock;
--- GB/T 4797.8 electric and electronic products Classification of environmental conditions of the natural environment fire exposure conditions.
This section GB/T Section 64797 of.
This section drafted in accordance with GB/T 1.1-2009 given rules.
This Part replaces GB/T 4797.6-1995 "Electrical and electronic products natural conditions of dust, sand, salt spray," and GB/T 4797.6-
Compared to 1995, the main changes are as follows.
--- 4.3 increase in the world's major deserts of the data in Table 4;
--- Increased 7, and the original data in Table 9 are incorporated as described in FIG.
This section uses redrafted law revision adopted IEC 60721-2-5.1991 "Classification of environmental conditions - Part 2. Natural Environment
Section 5. Dust, sand, salt mist. "
This part of IEC 60721-2-5.1991 and its technical differences for the following reasons.
--- According to the data of the measured increase of Tables 5, 8, 3, 5, 8, followed by the serial number to be adjusted accordingly;
--- 6.1 salt spray supplement our data, increased 6.1.3 "particle size" of the content;
--- Increased Chapter 7, "salt fog saline areas of" content;
--- Added Appendix B "sand movement in the gas stream" and Appendix C "sea salt spray particles to land transport and distribution" two informative
appendix.
This part of IEC 60721-2-5.1991 compared to the main editorial changes made the following.
--- Remove the IEC 60068-2-61.1991 Foreword and Introduction The increase of national standards foreword;
--- Delete the original IEC Appendix B references.
This part of the National Electrical and Electronic Products Environmental conditions and environmental tests for Standardization Technical Committee (SAC/TC8) and focal points.
This section drafted by. China Electric Apparatus Research Institute Co., Ltd., Defense Aerospace Science and Industry Technology Research Test Center, Ningbo Ou-known electrical appliances
Technology Co., Ltd., Ningbo Jiesheng Ocean Development Co., Ltd. Southern Jiangsu Wuxi Test Equipment Co., Ltd. Ningbo-Run Auto Parts axis, Ningbo
Think of Electrical and Mechanical Services Limited.
The main drafters of this section. Chen Xinxin, Li Hongmin, thanks to Long Ke, Ni Yiming, He waves.
This part of the standard replaces the previous editions are.
--- GB/T 4797.6-1995.
Classification of environmental conditions of the natural environment conditions
Dust, sand, salt spray
1 Scope
This section GB/T 4797 clarified the characteristics of nature appear dust, sand, salt, and these environmental factors during storage, transport
Which affect the product is exposed during transport and use. While the impact of these environmental factors often wind are closely linked, but this part is not
Wind involving environmental factors, see relevant content GB/T 4797.5.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 4797.5 electric and electronic products Classification of environmental conditions of the natural environment precipitation and wind conditions (GB/T 4797.5-2008,
IEC 60721-2-2. 1988, MOD)
GB/T 10593.2-2012 electric and electronic products environmental parameters measuring methods - Salt
ISO 9225.2012 Corrosion of metals and alloys to atmospheric corrosion corrosive effect of atmospheric environmental parameters measured (Corrosion
of metalsand aloys-Corrosivity ofatmospheres-Measurementofenvironmentalparameters
affectingcorrosivityofatmospheres)
3 Dust, sand, salt mist affect the product
3.1 Dust, sand wind, salt spray and associated products can have an impact on all aspects, the most important are.
a) dust seal into the sealed container or body;
b) causing the deterioration of electrical properties, such as contact failure, the contact resistance changes, the potentiometer track resistance changes;
c) caused by a worn or defective bearings, shafts, knobs, and other moving parts;
d) surface erosion (erosion, corrosion);
e) cause blurred optical surface;
f) lubricant contamination;
g) reduced thermal conductivity;
h) lead the work of the ventilation holes, bushings, conduits, filters, holes and other obstruction;
Static when i) high-speed movement (such as sandstorms), the impact of communication systems.
3.2 Dust, sand combined with other environmental factors (such as water vapor) appears, the product will have serious implications, such as corrosion and mildew.
Combined heat and dust chemically corrosive atmosphere can cause corrosion. In the atmosphere, salt spray would have a similar effect.
3.3 Consider ion conductivity and corrosive dust (for example, eliminating ice salt, etc.) influence.
4 Natural dust and sand environment
4.1 Classification of dust and sand
Depending on the aerodynamic characteristics of dust and sand distinction as follows.
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