GB/T 5169.16-2017 Fire hazard testing for electric and electronic products―Part 16:Test flames―50 W horizontal and vertical flame test methods (English Version)
Fire hazard testing for electric and electronic products - Part 16: Test flames - 50 W horizontal and vertical flame test methods
1 Scope
This part of GB/T 5169 specifies small-scale laboratory test procedures intended to compare the burning behaviour of different materials used in electrotechnical products when vertically or horizontally oriented test bar specimens are exposed to a small flame ignition source with a nominal thermal power of 50 W. These test methods determine either the linear burning rate or the self-extinguishing properties of materials.
These test methods of this part are applicable to solid and cellular materials that have an apparent density of more than 250 kg/m3, determined in accordance with ISO 845.
Two test methods are described. Method A is a horizontal burning test and is intended to determine the linear burning rate of materials under specific test conditions. Method B is a vertical burning test and is intended to determine whether materials self-extinguish under specific test conditions.
Note 1: ISO 9772 describes a test method for the determination of the burning characteristics to be used for materials with an apparent density of 250 kg/m3 or less. ISO 9773 describes a test method for the determination of the burning behaviour to be used for materials that due to their thinness, either distort and/or are burned up to the holding clamp using Method B of this part.
The test methods described provide classifications (see 8.4 and 9.4), which may be used for quality assurance, the pre-selection of component materials of products, or to verify the required minimum flammability classification of materials used in end products.
Note 2: Guidance on pre-selection is given in IEC 60695-1-30.
This part is intended for use by technical committees in the preparation of standards in accordance with the principles laid down in IEC Guide 104 and ISO/IEC Guide 51 .
One of the responsibilities of a technical committee is, wherever applicable, to make use of the series standards in the preparation of its standards. The requirements, test methods or test conditions of this part will not apply unless specifically referred to or included in the relevant standards.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 291:2008 Plastics - Standard atmospheres for conditioning and testing
ISO 293 Plastics - Compression moulding of test specimens of thermoplastic materials
ISO 294 (all parts) Plastics - Injection moulding of test specimens of thermoplastic materials
ISO 295 Plastics - Compression moulding of test specimens of thermosetting materials
ISO 307 Plastics – Polyamides - Determination of viscosity number)
ISO 9773 Plastics - Determination of burning behaviour of thin flexible vertical specimens in contact with a small-flame ignition source
ISO 13943:2008 Fire safety - Vocabulary
ISO 16012 Plastics - Determination of linear dimensions of test specimens
IEC 60695-4 Fire hazard testing - Part 4: Terminology concerning fire tests for electrotechnical products
IEC 60695-11-4 Fire hazard testing - Part 11-4: Test flames - 50 W flames - Apparatus and conformational test method
IEC Guide 104 The preparation of safety publications and the use of basic safety publications and group safety publications
ISO/IEC Guide 51 Safety aspects - Guidelines for their inclusion in standards
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 13943:2008 and IEC 60695-4, some of which are reproduced below for the user’s convenience, as well as the following apply.
3.1
afterflame
flame that persists after the ignition source has been removed under specified test conditions
[ISO 13943:2008, Definition 4.6]
3.2
afterflame time
length of time for which an afterflame persists under specified test conditions
Note: Designated in Method B of this part by the parameters t1 and t2.
[ISO 13943:2008, Definition 4.7]
3.3
afterglow
persistence of glowing combustion after both removal of the ignition source and the cessation of any flaming combustion
[ISO 13943:2008, Definition 4.8]
3.4
afterglow time
length of time which an afterglow persists under specified test conditions
Note: Designated in Method B of this part by t
Contents
Foreword i
Introduction v
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Significance of the fire tests
6 Apparatus
7 Test specimens
8 Test method A - Horizontal burning test
9 Test method B - Vertical burning test
Annex A (Informative) Precision of test method A
Annex B (Informative) Precision of test method B
Bibliography
Figure 1 Horizontal burning test apparatus
Figure 2 Flexible test specimen support fixture - method A
Figure 3 Vertical burning test apparatus - method B
Figure 4 Bar test specimen
Figure 5 Optional clearance gauge
Figure 6 Clearance gauge
Figure 7 Flame application
Figure 8 Flame application when there are molten drips
Figure 9 HB specimen gauge (Example)
Figure 10 V specimen gauge (Example)
Figure 11 Flame front position not classified as “burned to the holding clamp”
Figure 12 Flame front position classified as “burned to the holding clamp”
Table 1 Thickness tolerances
Table 2 Criteria for vertical burning classification
Table A.1 Linear burning rate
Table B.1 Afterflame time and afterflame plus afterglow times
GB/T 5169.16-2017 Fire hazard testing for electric and electronic products―Part 16:Test flames―50 W horizontal and vertical flame test methods (English Version)
Standard No.
GB/T 5169.16-2017
Status
valid
Language
English
File Format
PDF
Word Count
14500 words
Price(USD)
400.0
Implemented on
2018-7-1
Delivery
via email in 1 business day
Detail of GB/T 5169.16-2017
Standard No.
GB/T 5169.16-2017
English Name
Fire hazard testing for electric and electronic products―Part 16:Test flames―50 W horizontal and vertical flame test methods
Fire hazard testing for electric and electronic products - Part 16: Test flames - 50 W horizontal and vertical flame test methods
1 Scope
This part of GB/T 5169 specifies small-scale laboratory test procedures intended to compare the burning behaviour of different materials used in electrotechnical products when vertically or horizontally oriented test bar specimens are exposed to a small flame ignition source with a nominal thermal power of 50 W. These test methods determine either the linear burning rate or the self-extinguishing properties of materials.
These test methods of this part are applicable to solid and cellular materials that have an apparent density of more than 250 kg/m3, determined in accordance with ISO 845.
Two test methods are described. Method A is a horizontal burning test and is intended to determine the linear burning rate of materials under specific test conditions. Method B is a vertical burning test and is intended to determine whether materials self-extinguish under specific test conditions.
Note 1: ISO 9772 describes a test method for the determination of the burning characteristics to be used for materials with an apparent density of 250 kg/m3 or less. ISO 9773 describes a test method for the determination of the burning behaviour to be used for materials that due to their thinness, either distort and/or are burned up to the holding clamp using Method B of this part.
The test methods described provide classifications (see 8.4 and 9.4), which may be used for quality assurance, the pre-selection of component materials of products, or to verify the required minimum flammability classification of materials used in end products.
Note 2: Guidance on pre-selection is given in IEC 60695-1-30.
This part is intended for use by technical committees in the preparation of standards in accordance with the principles laid down in IEC Guide 104 and ISO/IEC Guide 51 .
One of the responsibilities of a technical committee is, wherever applicable, to make use of the series standards in the preparation of its standards. The requirements, test methods or test conditions of this part will not apply unless specifically referred to or included in the relevant standards.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 291:2008 Plastics - Standard atmospheres for conditioning and testing
ISO 293 Plastics - Compression moulding of test specimens of thermoplastic materials
ISO 294 (all parts) Plastics - Injection moulding of test specimens of thermoplastic materials
ISO 295 Plastics - Compression moulding of test specimens of thermosetting materials
ISO 307 Plastics – Polyamides - Determination of viscosity number)
ISO 9773 Plastics - Determination of burning behaviour of thin flexible vertical specimens in contact with a small-flame ignition source
ISO 13943:2008 Fire safety - Vocabulary
ISO 16012 Plastics - Determination of linear dimensions of test specimens
IEC 60695-4 Fire hazard testing - Part 4: Terminology concerning fire tests for electrotechnical products
IEC 60695-11-4 Fire hazard testing - Part 11-4: Test flames - 50 W flames - Apparatus and conformational test method
IEC Guide 104 The preparation of safety publications and the use of basic safety publications and group safety publications
ISO/IEC Guide 51 Safety aspects - Guidelines for their inclusion in standards
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 13943:2008 and IEC 60695-4, some of which are reproduced below for the user’s convenience, as well as the following apply.
3.1
afterflame
flame that persists after the ignition source has been removed under specified test conditions
[ISO 13943:2008, Definition 4.6]
3.2
afterflame time
length of time for which an afterflame persists under specified test conditions
Note: Designated in Method B of this part by the parameters t1 and t2.
[ISO 13943:2008, Definition 4.7]
3.3
afterglow
persistence of glowing combustion after both removal of the ignition source and the cessation of any flaming combustion
[ISO 13943:2008, Definition 4.8]
3.4
afterglow time
length of time which an afterglow persists under specified test conditions
Note: Designated in Method B of this part by t
Contents of GB/T 5169.16-2017
Contents
Foreword i
Introduction v
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Significance of the fire tests
6 Apparatus
7 Test specimens
8 Test method A - Horizontal burning test
9 Test method B - Vertical burning test
Annex A (Informative) Precision of test method A
Annex B (Informative) Precision of test method B
Bibliography
Figure 1 Horizontal burning test apparatus
Figure 2 Flexible test specimen support fixture - method A
Figure 3 Vertical burning test apparatus - method B
Figure 4 Bar test specimen
Figure 5 Optional clearance gauge
Figure 6 Clearance gauge
Figure 7 Flame application
Figure 8 Flame application when there are molten drips
Figure 9 HB specimen gauge (Example)
Figure 10 V specimen gauge (Example)
Figure 11 Flame front position not classified as “burned to the holding clamp”
Figure 12 Flame front position classified as “burned to the holding clamp”
Table 1 Thickness tolerances
Table 2 Criteria for vertical burning classification
Table A.1 Linear burning rate
Table B.1 Afterflame time and afterflame plus afterglow times
