This standard specifies the glow-wire test method for the flammability test of samples of solid electrical insulating materials and other solid combustible materials. The test results can be used to evaluate the performance of the above-mentioned materials, namely the ability of the flame to extinguish after the heated glow-wire is removed and the ability of the burning sample to produce glowing particles without igniting the bottom layer of silk paper under the test sample. This test method is not suitable for determining the flammability of all items in the equipment, because the size and structure of the insulation system or combustible parts and the heat transfer of adjacent metal or non-metallic parts have a great influence on the flammability of the materials used. In addition, this test method is not suitable for determining the fire resistance or fire hazard of the equipment. GB/T 5169.12-1999 Test method for fire hazard test of electrical and electronic products Glow-wire flammability test of materials GB/T5169.12-1999 Standard download decompression password: www.bzxz.net

GB/T 5169.12-1999
This standard is equivalent to the International Electrotechnical Commission IEC695-2-1/2:1994 (1st Edition) "Fire Hazard Tests Part 2: Test Methods Part 1/Chapter 2: Glow-wire Flammability Tests for Materials". This standard is a basic electrical safety standard for electrical and electronic products and their materials, and specifies the glow-wire flammability test method for solid electrical insulating materials or other solid combustible materials. GB/T5169.4-1985 "Fire hazard testing of electric and electronic products - Glow-wire test methods and guidelines" is replaced by the following standards: GB/T 5169.10-1997 Fire hazard testing of electric and electronic products - Test methods - Glow-wire test methods - General principles (idt IEC 695-2-1/0:1994) Test methods - Glow-wire test and guidelines for finished products GB/T 5169.11-1997 Fire hazard testing of electric and electronic products - Test methods - Glow-wire flammability test for materials (idt IEC 695-2-1/1:1994) GB/T5169.12-1999 Fire hazard testing of electric and electronic products - Test methods - Glow-wire flammability test for materials (idt IEC 695-2-1/2:1994)
GB/T5169.13-1999 Fire hazard test for electric and electronic products Test method Glow-wire ignitability test for materials (idt IEC 695-2-1/3:1994)bzxz.net
Test method Glow-wire test method
This standard is used together with GB/T5169.10-1997 "General Rules for Fire Hazard Tests for Electric and Electronic Products".
From the date of entry into force, this standard will replace GB/T5169.4-1985. This standard was proposed by the State Bureau of Machinery Industry. This standard is under the jurisdiction of the National Technical Committee for Environmental Conditions and Environmental Testing for Electric and Electronic Products. This standard was drafted by Guangzhou Electric Science Research Institute. The main drafters of this standard are Fang Peiwen, Huang Wenxiu, and Liu Yuezhan. This standard is entrusted to Guangzhou Electric Science Research Institute for interpretation. 508
GB/T5169.12--1999
IEC Foreword
1) IEC (International Electrotechnical Commission) is a worldwide standardization organization composed of national electrotechnical committees (IEC National Committees). The mission of IEC is to promote international cooperation on various standardization issues in the field of electrical and electronic engineering. To this end, in addition to organizing other activities, it also publishes various international standards. IEC international standards are entrusted to technical committees for formulation. Any IEC National Committee interested in the issue under discussion can participate in this formulation work, and international organizations, governmental and non-governmental organizations that have established relations with IEC can also participate in this formulation work. IEC cooperates closely with the International Organization for Standardization (ISO) in accordance with the agreement it has reached with it. 2) IEC's formal resolutions or agreements on issues are formulated by technical committees represented by national committees that are particularly interested in the issue, and express the international consensus on the issue as accurately as possible. 3) These resolutions or agreements are published in the form of standards, technical reports or guidelines, and are recommended for international use and accepted by national committees in this sense.
4) In order to promote international unification, IEC National Committees undertake to adopt IEC International Standards as faithfully as possible in their national or regional standards. Any inconsistencies between IEC standards and corresponding national or regional standards shall be clearly pointed out in the national or regional standards as far as possible.
This International Standard IEC695-2-1/2 was prepared by IECTC89 (Technical Committee for Fire Hazard Testing). This International Standard is a basic safety standard in accordance with IEC104 Guide. This International Standard is based on the following documents. Draft International Standard
89 (Central Office) 22
Voting Report
89 (Central Office) 30
Voting Full information on this standard can be found in the voting report indicated in the table above. Part 1 of IEC695-2 cancels and replaces IEC695-2-1 published in 1991, Chapter 7 of IEC707 published in 1981 and Chapter 6 of IEC829 published in 1988.
IEC695~2-1 consists of the following chapters: IEC695-2-1/0 Fire hazard testing Part 2: Test methods Part 1/Chapter 0: Glow-wire test method General IEC695-2-1/1 Fire hazard testing Part 2: Test methods Part 1/Chapter 1: Glow-wire test and guidance for finished products IEC695-2-1/2 Fire hazard testing Part 2: Test methods Part 1/Chapter 2: Glow-wire flammability test on materials IEC695-2-1/3 Fire hazard testing Part 2: Test methods Part 1/Chapter 3: Glow-wire ignitability test on materials This standard is used together with IEC695-2-1/0. 509
1 Scope
National Standard of the People's Republic of China
Fire hazard testing for electric and electronic products-Test methods-Glow-wire flammability test on materials
Fire hazard testing for electric and electronic products-Test methods-Glow-wire flammability test on materialsGB/T 5169.12—1999
idtIEC695-2-1/2:1994
Replaces GB/T5169.4—1985
This standard specifies the glow-wire test method for flammability testing of samples of solid electrical insulating materials and other solid combustible materials. The test results can be used to evaluate the performance of the above-mentioned materials, namely, the ability of the flame to extinguish after the heated glow-wire is removed and the ability of the burning sample to produce glowing particles without igniting the base paper underneath the test sample. This test method is not applicable to determine the flammability of all items in the equipment, because the size and structure of the insulation system or combustible parts and the heat transfer of adjacent metal or non-metallic parts have a great influence on the flammability of the materials used. In addition, this test method is not applicable to determine the fire resistance or fire hazard of the equipment. 2 Referenced standards and definitions
2.1 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard was published, the versions shown were valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T10580--1989 Standard conditions for solid electrical insulating materials before and during testing (eqVIEC212:1971) (For details, see GB/T5169.10--1997 Fire hazard test methods for electric and electronic products General principles for glow-wire test methods (idtIEC695-2-1/0:1994))
2.2 Definitions
This standard adopts the following definitions.
Flammability
The ability of a material or product to burn with flame under specified test conditions (see Article 2.57 of GB/T5169.1-1997). Glow-wire flammability index (GWFI) glow-wire flammability index In three consecutive tests, the flame or glow of the test sample is extinguished within 30 seconds after the glow-wire is removed, and the specified laying substrate does not ignite due to burning drops or particles. The highest test temperature. 3 Test description
The test sample should be a fixed size and have a sufficiently large flat part. The tested flat part should be in a vertical position during the test. The test sample can be made by the following methods: compression molding, transfer molding, injection molding, casting or machining from a plate or a part with a sufficiently large flat section.
Approved by the State Administration of Quality and Technical Supervision on October 10, 1999 510
Implementation on May 1, 2000
The dimensions of the flat section of the test sample should be:
Length ≥ 60mm,
Width (inside the fixture) ≥ 60mm;
Thickness (3.0±0.2) mm.
GB/T 5169.12—1999
According to the requirements of this test, a group of 10 test samples is usually required to evaluate flammability. Note: The flammability usually changes with the thickness of the tested material. In addition to the specified standard thickness, thicknesses of 0.8 mm, 1.6 mm and 6.0mm test sample, the test results obtained are also useful. The test sample is placed so that its free plane is in a vertical position. In order to assess the possibility of fire spread caused by burning or glowing particles falling from the test sample during the test, a specified base layer should be placed under the test sample. During the test, the top of the electrically heated glow wire is in contact with the free plane of the test sample. A new sample is used for each test. The test is repeated with different test temperatures of the glow wire to determine the GWFI of the test material.
Description of the test apparatus
Description of the test apparatus is shown in GB/T5169.10. The base layer placed under the test sample and the distance between the base layer and the glow wire when the glow wire is applied to the test sample should be as specified in GB/T5169.10.
5 Severity level
The top temperature of the glow wire and the duration of applying the glow wire to the test sample should be selected from Table 1. Table 1
Test temperature, ℃
Note: Test duration, = (30 ± 1)s6 Calibration and verification of temperature measurement system
Calibration and verification of temperature measurement system refer to the provisions in GB/T5169.10. 7 Pretreatment
The base layer shall be pretreated in accordance with the provisions in GB/T5169.10. Allowable deviation, K
Before the test, the test sample shall be pretreated in standard atmosphere B in accordance with GB/T10580 for 48h (48h/23℃/50%). 8 Initial measurement
The test sample shall be fully marked and visually inspected. 511
Measure and record the thickness of the test sample.
9 Test procedure
Notes refer to GB/T5169.10.
GB/T 5169.12—-1999
9.1 When installing or clamping the test sample, it should be ensured that the heat dissipation caused by its support or fastening device can be ignored. The layout of the test sample should be:
The plane area of ​​the test surface is perpendicular
The top of the glow wire acts on the center of the plane area of ​​the test sample surface. 9.2 See GB/T5169.10.
9.3 The glow wire is electrically heated to a certain test temperature specified in Chapter 5 that is considered to be just sufficient to ignite the test sample, and measured with a calibrated thermocouple. Before starting the test, it is necessary to ensure that the temperature and heating current remain constant for at least 60s, and during this time or during the calibration process, a certain distance is maintained between the glow wire and the test sample or a suitable shield is used. Ensure that the test sample is not affected by thermal radiation.
9.4 In addition to 9.4 of GB/T 5169.10, the duration of contact between the top of the glow-wire and the test sample shall be (30 ± 1) s as specified in Chapter 5.
9.5 Unless the criteria specified in Chapter 11 are met, the test shall be repeated with a new test sample, and the temperature of the repeated test shall be higher or lower, depending on whether the previous test ignites. 10 Observation and measurement
During the application of the glow-wire and within 30 s after the application, the test sample and the underlying substrate shall be observed and the following records shall be made:
a) The duration from the top of the glow-wire touching the test sample or the underlying substrate igniting (ti); b) The duration from the top of the glow-wire touching the test sample to the flame extinguishing (t.), which may be during or after the application. 11 Evaluation of test results
The test sample is considered to have withstood the test if both of the following conditions are met: a) the flame or glow of the test sample is extinguished within 30 s after the glow-wire is removed, and b) the silk paper placed as a base under the test sample does not ignite. If these two conditions are met, the test should be repeated with a new test sample at a higher test temperature selected from the table in Chapter 5.
If both or one of the above conditions is not met, the test should be repeated with a new test sample at a lower test temperature selected from the table in Chapter 5.
The test should be repeated two more times at the highest test temperature that the test sample can withstand. The glow-wire flammability index (GWFI) to be determined is the highest test temperature for which conditions a) and b) are met in three consecutive tests. The GWFI should be recorded as follows:
For example, for a 3 mm thick test sample, the test temperature is 850 ° C, then record: GWFI: 850/3. 0
12 Test report
The test report should include the following:
--The test method of this standard is referenced;
GB/T5169.12-1999
The complete identification of the test material, including the model and manufacturer (Chapter 8); Description of the test sample preparation method (Chapter 3); Pretreatment (Chapter 7);
Glow Wire Flammability Index (GWFI) (Chapter 11). 5135 Unless the criteria specified in clause 11 are met, the test shall be repeated with a new test specimen, at a higher or lower temperature, depending on whether ignition occurred in the previous test. 10 Observations and measurements
During the application of the glow-wire and within 30 s after its application, the test specimen and the underlying substrate shall be observed and the following shall be recorded:
a) the duration of ignition from the time the top of the glow-wire touches the test specimen or the underlying substrate (ti); b) the duration of ignition from the time the top of the glow-wire touches the test specimen until the flame goes out (t.), which may be during or after the application. 11 Evaluation of test results
A test specimen is considered to have withstood the test if both of the following conditions are met: a) the flame or glow of the test specimen goes out within 30 s after the glow-wire is removed, and b) the underlying tissue paper does not ignite. If these two conditions are met, the test shall be repeated with a new test specimen, at a higher test temperature selected from the table in clause 5.
If either or both of the above conditions are not met, the test shall be repeated with a new test sample at a lower test temperature selected from the table in Chapter 5.
The test shall be repeated two more times at the highest test temperature to which the test sample can withstand. The Glow Wire Flammability Index (GWFI) to be determined is the highest test temperature at which conditions a) and b) are met in three consecutive tests. The GWFI should be recorded as follows:
For example, for a 3 mm thick test sample, the test temperature is 850 ° C, then record: GWFI: 850/3. 0
12 Test report
The test report should include the following:
--The test method of this standard is referenced;
GB/T5169.12-1999
The complete identification of the test material, including the model and manufacturer (Chapter 8); Description of the test sample preparation method (Chapter 3); Pretreatment (Chapter 7);
Glow Wire Flammability Index (GWFI) (Chapter 11). 5135 Unless the criteria specified in clause 11 are met, the test shall be repeated with a new test specimen, at a higher or lower temperature, depending on whether ignition occurred in the previous test. 10 Observations and measurements
During the application of the glow-wire and within 30 s after its application, the test specimen and the underlying substrate shall be observed and the following shall be recorded:
a) the duration of ignition from the time the top of the glow-wire touches the test specimen or the underlying substrate (ti); b) the duration of ignition from the time the top of the glow-wire touches the test specimen until the flame goes out (t.), which may be during or after the application. 11 Evaluation of test results
A test specimen is considered to have withstood the test if both of the following conditions are met: a) the flame or glow of the test specimen goes out within 30 s after the glow-wire is removed, and b) the underlying tissue paper does not ignite. If these two conditions are met, the test shall be repeated with a new test specimen, at a higher test temperature selected from the table in clause 5.
If either or both of the above conditions are not met, the test shall be repeated with a new test sample at a lower test temperature selected from the table in Chapter 5.
The test shall be repeated two more times at the highest test temperature to which the test sample can withstand. The Glow Wire Flammability Index (GWFI) to be determined is the highest test temperature at which conditions a) and b) are met in three consecutive tests. The GWFI should be recorded as follows:
For example, for a 3 mm thick test sample, the test temperature is 850 ° C, then record: GWFI: 850/3. 0
12 Test report
The test report should include the following:
--The test method of this standard is referenced;
GB/T5169.12-1999
The complete identification of the test material, including the model and manufacturer (Chapter 8); Description of the test sample preparation method (Chapter 3); Pretreatment (Chapter 7);
Glow Wire Flammability Index (GWFI) (Chapter 11). 513
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