GB/T 5454-1997 English PDF (GBT5454-1997)

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GB/T 5454-1997: Textiles. Burning behaviour. Oxygen index method
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 59.080.01 W 04
GB/T 5454-1997
neq ISO 4589.1984 Replacing GB 5454-1985
Textiles - Burning behavior - Oxygen index method
(neq ISO 4589.1984)
Issued on. June 09, 1997 Implemented on. December 01, 1997
Issued by. State Bureau of Technical Supervision
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Definitions ... 5
4 Principles ... 6
5 Health and safety of testing personnel ... 6
6 Equipment and materials ... 6
7 Specimen and humidity conditioning ... 8
8 Test procedures ... 9
9 Calculation and result representation ... 10
10 Test report ... 13
Appendix A (Normative) Calculation of oxygen concentration ... 14
Appendix B (Informative) Relationship between oxygen concentration and
oxygen, nitrogen flow ... 15
Appendix C (Informative) Equipment calibration ... 19
Appendix D (Informative) Test result example ... 20
Foreword
This standard non-equivalently adopted the international standard ISO 4589. 1984 “Plastics -Burning behavior -Oxygen index method”. It combined the characteristics of the textiles to make modification of the national standard GB 5454-85. Its main technical contents and test methods and procedures are consistent with international standard.
This standard inherits the main technical content of the previous version, makes supplementary and editorial changes of the name of the standard, the arrangement of the clauses, and the technical content. It adds the “foreword”, deletes the additional instructions, and incorporates the content into the foreword
The name of this standard has been changed to “Textiles - Burning behavior - Oxygen index method”.
In clause 1 “Scope”, ADD the test methods contents under which conditions as specified by this standard, in the scope of determination, ADD “including single-component and multi-component”.
In this standard, ADD clause 2 “Normative references”, ADD foreign terms corresponding to 3 nouns and 4 nouns, ADD clause 5 “Testing personnel health and safety”.
In clause 6, MODIFY the “instrument” into “equipment and material”, MAKE editorial changes of the contents, ADD one clause “Gas decompressor”.
In clause 7, MODIFY the “specimen” into “specimen and temperature conditioning”. MODIFY the number of specimen cutting into “take at least 15 pieces along warp and weft for general textiles”, DELETE the specimen preparation test method that “It shall sew three 8 ~ 11 Nm glass fiber when testing the textiles made by fused fiber”. MODIFY “The specimen shall be balanced for over 24 h” into “The specimen is subject to humidity conditioning for 8 ~ 24 h depending on its thickness to make it reach temperature equilibrium”.
In clause 8, ADD “determination of initial oxygen concentration”, “increase decrease method”, and “determination of limiting oxygen index” to replace clause 6.7 of the original standard.
In clause 9 of this standard, for the oxygen index calculation, ADD three clauses “k-value coefficient determination table”, “verification of oxygen concentration interval”, and “precision”.
In this standard, ADD “Appendix A Calculation of oxygen concentration”, CHANGE the name of “Appendix A References” into “Appendix B”, ADD “Appendix C Calibration of equipment” and “Appendix D Example of typical test results”.
This standard was first published in 1985 and revised in 1995.
Appendix A of this standard is normative.
Appendix B, Appendix C, and Appendix D of this standard are informative.
This standard replaced GB 5454-85 from the effective date.
This standard was proposed by the China Textile Federation.
This standard shall be under the jurisdiction of the China Textile Federation
Standardization Institute.
Drafting organizations of this standard. China Textile Association
Standardization Institute.
The main drafters of this standard. Jin Chunxiu, Zhao Shuqing.
Textiles - Burning behavior - Oxygen index method
1 Scope
This standard specifies the test methods for determining the minimum oxygen concentration (also known as limiting oxygen index) required to maintain the burning of the specimen in the mixed flow of oxygen and nitrogen when the specimen is vertical.
This standard applies to the determination of burning behavior of various types of textiles (including single-component or multi-component), such as woven fabrics, knitted fabrics, non-woven fabrics, coated fabrics, laminated fabrics, composite fabrics, carpets (including flame retardant treated and untreated).
This standard is only used to determine the burning behavior of textiles under laboratory conditions and to control the quality of the products. It cannot be used as a basis for assessing the risk of fire under actual conditions of use, or it can only be used to analyze one of the factors when a special purpose material catches fire.
2 Normative references
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. At the time of publication, the editions indicated were valid. All standards will be revised and all parties using this standard shall explore the possibility of using the latest version of the following standards.
GB 6529-86 Standard atmospheres for textiles conditioning and testing
3 Definitions
This standard uses the following definitions.
3.1
Afterflame time
Under the specified test conditions, the duration during which the material continues flame burning after moving the fire source away.
3.2