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GB/T 5455-2014 PDF English


Search result: GB/T 5455-2014 English: PDF (GB/T5455-2014)
Standard IDContents [version]USDSTEP2[PDF] delivered inName of Chinese StandardStatus
GB/T 5455-2014English85 Add to Cart 0-9 seconds. Auto-delivery. Textiles -- Burning behaviour -- Determination of damaged length, afterglow time and after flame time of vertically oriented specimens Valid
GB/T 5455-1997English279 Add to Cart 3 days Textiles--Burning behaviour--Vertical method Obsolete
GB/T 5455-1985EnglishRFQ ASK 3 days Textile fabrics--Determination of flame resistance--Vertical method Obsolete
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GB/T 5455-2014: PDF in English (GBT 5455-2014)

GB/T 5455-2014 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 59.080.30 W 04 Replacing GB/T 5455-1997 Textile – Burning Behaviour – Determination of Damaged Length, Afterglow Time and Afterflame Time of Vertically Oriented Specimens ISSUED ON. SEPTEMBER 3, 2014 IMPLEMENTED ON. MARCH 1, 2015 Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China; Standardization Administration of the People's Republic of China. Table of Contents Foreword ... 3  1 Application Scope ... 5  2 Normative References ... 5  3 Terms and Definitions ... 5  4 Principle ... 6  5 Health and Safety of Test Personnel ... 6  6 Apparatus and Materials ... 6  7 Specimen Preparation ... 9  8 Test Conditions ... 10  9 Test Procedure ... 10  10 Calculation of Results ... 11  11 Test Report ... 11  Foreword This Standard was drafted in accordance with the rules given in GB/T 1.1-2009. This Standard replaces GB/T 5455-1997, Textiles – Burning Behavior – Vertical Method. Compared with GB/T 5455-1997, the major changes of this Standard are as follows. -- the standard name is changed into Textile – Burning Behaviour – Determination of Damaged Length, Afterglow Time and Afterflame Time of Vertically Oriented Specimens; -- it modifies the application scope; -- it deletes two terms, “afterflame” and “afterglow” and adds the term “flame application time”; -- it modifies Figure 1 in the original standard; -- it adds the diagram of specimen holder (see Figure 2); -- it deletes the control part of 6.1.5 of the original standard; -- it modifies the description of “gas” (see 6.1.4); -- it adds the requirements for the hook of weights (see 6.3); -- it adds oven and dryer (see 6.6 and 6.7); -- it modifies the dimensions and number of specimens (see 7.1); -- it adds one conditioning condition for option (see 7.3); -- it makes 8.1 “test temperature and humidity” of “test procedure” of the original standard as an independent article (see Article 8); -- it reserves the main technical content of Article 8.1 “test procedure”, describes test procedure once again and adds an optional flame application time; -- it adds the diagram of “damaged length measurement” (see Figure 4); -- it adds one method for calculating results (see Article 10). This Standard was proposed by China National Textile and Apparel Council. This Standard shall be under the jurisdiction of the Basic Technical Subcommittee of the National Standardization Technical Committee on Steels (SAC/TC 209/ SC 1). The drafting organizations of this Standard. Chinatesta Textile (Beijing) Testing and Textile – Burning Behaviour – Determination of Damaged Length, Afterglow Time and Afterflame Time of Vertically Oriented Specimens 1 Application Scope This Standard specifies the test method for the determination of burning behaviour when flame is applied to the bottom edge of textile vertically oriented. This Standard applies to all types of textiles and products. 2 Normative References The following referenced documents are indispensable for the application of this document. For dated references, only the edition dated applies to this document. For undated references, the latest edition of the referenced documents (including all amendments) applies to this Standard. GB/T 6529, Textiles – Standard Atmospheres for Conditioning and Testing 3 Terms and Definitions The following terms and definitions apply to this document. 3.1 afterflame The time of flame combustion of material after withdrawing ignition source under specified conditions, expressed in s. [GB/T 3291.3, Definition 2.145] 3.2 afterglow time The time of flameless combustion of material under specified test conditions, after flame combustion terminates or ignition source is withdrawn if it is originally flameless combustion, expressed in s. [GB/T 3291.3, Definition 2.146] specified in GB/T 6529; conditioned specimens are placed into a sealed container. Condition B. take out specimens after they have been dried in a drying oven for (30 ± 2 min) at (105 ± 3)°C; place into a desiccator for cooling with the time of cooling not less than 30 min. NOTE The results tested under Condition A and Condition B are incomparable. 8 Test Conditions Carry out test in the atmospheric environment of temperature 10°C ~ 30°C and relative humidity 30% ~ 80%. 9 Test Procedure 9.1 Open gas supply valve before closing the front door of test chamber; light up igniter; adjust the height of flame to make it stabilize at (40 ± 2) mm. Before starting the first test, the combustion shall continue stably in this state for 1 min at least and then the flame is put out. 9.2 Take out specimens from sealed container or desiccator; place on specimen holder to make specimen as smooth as possible. The bottom side of specimens shall be aligned with the bottom side of specimen holder. The edge of specimen holder shall be clamped with a sufficient quantity of clamps. Then clamp the upper end of specimens mounted to suspend on the support, to make its side face fixed by specimen holder fixture and specimen holder suspended perpendicularly to the centre of test chamber. 9.3 Close the chamber door; light up igniter; move the flame to make the bottom side of specimen just above the centre of the flame after the flame become stabilized; ignite specimens. At this moment, the time from taking specimens out of sealed container or desiccator shall be within 1 min. 9.4 The time of applying flame to specimens, i.e. flame application time, is subjected to the conditioning condition selected (see 7.3). 12 s for Condition A; 3 s for Condition B. 9.5 After flame application time, withdraw igniter and put out flame; meanwhile, open timer and record afterflame time and afterglow time, accurate to 0.1 s. If any specimen is burned through, it shall be recorded. 9.6 When a fabric made of molten fibre is to be tested, degreasing cotton of 10 mm in thickness shall be used to cover the bottom of test chamber, if molten drops are generated during the combustion of specimens to be tested. Observe whether the molten drops cause the combustion or afterglow of degreasing cotton and take records. a) that test is carried out in accordance with this Standard; b) description of sample; c) conditioning conditions for specimens (Condition A or Condition B); d) atmospheric conditions during test; e) gas selected for test; f) measured value and mean value of afterflame time, afterglow time and damaged length of specimen. If any specimen is burned through, report the afterflame time and afterglow time of the specimens that are not burned through as well as measured value and mean value of damaged length, and indicate how many specimens are burned through; g) characteristics of specimen after combustion, such as carbonization, melting, shrinkage and crimp; h) whether drippings are generated during combustion and whether it causes combustion or afterglow of degreasing cotton; i) test date and test personnel; j) any deviation from this Standard. ......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.