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GB 8624-2012 PDF English

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GB 8624-2012: Classification for burning behavior of building materials and products
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GB 8624: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] deliveryName of Chinese StandardStatus
GB 8624-2012English85 Add to Cart 0-9 seconds. Auto-delivery Classification for burning behavior of building materials and products Valid
GB 8624-2006EnglishRFQ ASK 9 days Classification for burning behavior of building materials and products Obsolete
GB 8624-1997English199 Add to Cart 2 days Classification on burning behaviour for building meterials Obsolete
GB 8624-1988EnglishRFQ ASK 3 days Classified method for burning behaviour of building materials Obsolete

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GB 8624-2012: Classification for burning behavior of building materials and products

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GB ICS 13.220.50 C 80 NATIONAL STANDARD Replacing GB 8624-2006 Classification for burning behavior of building materials and products Issued on. DECEMBER 31, 2012 Implemented on. OCTOBER 01, 2013 Jointly issued by. General Administration of Quality Supervision, Inspection and Quarantine (AQSIQ); and the Standardization Administration (SAC) of the People's Republic of China.

Table of Contents

Foreword... 3 Introduction... 5 1 Scope... 6 2 Normative References... 6 3 Terms and Definitions... 7 4 Burning Behavior Grade... 9 5 Burning Behavior Classification Criteria... 10 5.1 Building Materials... 10 5.2 Building Products... 12 6 Mark of Burning Behavior Grade... 14 7 Classification Inspection Report... 14 Appendix A... 16 Appendix B... 22 Appendix C... 24 Bibliography... 25

Foreword

Chapter 4, Chapter 5 and 6.1 of this standard are compulsory; the rest are recommendatory. This standard was drafted according to the rules given in GB/T 1.1-2009. This standard replaces GB 8624-2006 "Classification for burning behavior of building materials and products". Compared with GB 8624-2006, the main technical changes, except the editorial modifications, are as follows. - Modify the Foreword, Introduction and part of Terms and Definitions. Delete the Symbols and Abbreviations; - Modify the division and classification criteria of burning behavior grade (see Chapter 4 and 5; Chapter 4, 10 and 11 in Edition 2006). - Add the burning behavior classification of building products (see 5.2); - Delete the test methods; test principles and test sample preparation; classification test quantity; test of building products (except the flooring materials); test of flooring material; and application scope of this classification (see Chapters 5, 6, 7, 8,9 and 13 of Edition 2006); - Modify the grade mark of burning behavior, additional information and mark (see Chapter 6 and Appendix B; Chapters 4 and 12 in Edition 2006); - Delete the contents of previous Appendix A, Appendix B and Appendix C. Supplement the contents of new Appendix A, Appendix B and Appendix C. This standard is reference to EN 13501-1.2007 "Fire classification of construction products and building elements - Part 1.Classification using data from reaction to fire tests". This standard was proposed by the Ministry of Public Security of the People's Republic of China. This standard shall be under the jurisdiction of the Fireproof Materials Technical Subcommittee of National Technical Committee on Fire Protection of Standardization Administration of China (SAC/TC 13/SC 7). Responsible drafting organization of this standard. Sichuan Fire Research Institute of Ministry of Public Security. Participating drafting organizations of this standard. Technical Supervision and Research Center of the Building Materials Industry, China Building Materials Academy, Institute of Fire Prevention of China Academy of Building Research, Research Institute of Wood Industry of Chinese Academy of Forestry, Bayer Materials Science (China) Co., Ltd., Armacell Thermal Insulation Materials (Guangzhou) Co., Ltd., Owens Corning (China) Investment Co., Ltd., Aeroflex International Co., Ltd. Shanghai Armstrong Building Products Co., Ltd., Huamei Group Co., Ltd., Changzhou Jingxue Insulation Technology Co., Ltd., Kingfa Science and Technology Co., Ltd., Wanhua Chemical Group Co., Ltd., and Feininger (Nanjing) Energy Saving Technology Co., Ltd. Main drafting staffs of this standard. Li Feng, Zhao Chenggang, Lu Guojian, Zeng Xubin, Deng Xiaobing, Liu Songlin, Liu Wuqiang, Liu Haibo, Ma Daozhen, and Chen Zhilin. The previous editions of this standard are. - GB 8624-1988, GB 8624-1997 and GB 8624-2006.

1 Scope

This standard specifies the terms and definitions, burning behavior grades, burning behavior grade criteria, burning behavior grade identification and inspection report of building materials and products. This standard is applicable to burning behavior classification and judgment of building materials, decoration materials and products in construction engineering.

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 normative document (including all corrigenda) applies. GB/T 2406.2 Plastics - Determination of Burning Behavior by Oxygen Index - Part 2.Ambient-temperature Test GB/T 8408 Plastics - Determination of Burning Characteristics - Horizontal and Vertical Test GB/T 5169.16 Fire Hazard Testing for Electric and Electronic Products - Part 16. Test Flames - 50W Horizontal and Vertical Flame Test Methods GB/T 6454 Textiles - Burning Behavior - Oxygen Index Method GB/T 5455 Textiles - Burning Behavior - Vertical Method GB/T 5464 Non-combustibility Test Method of Building Materials GIB/T 5907 Fundamental Terminology of Fire Protection. Part 1 GB/T 8333 Test Method for Flammability of Rigid Cellular Plastic - Vertical Burning Method GB/T 8626 Test Method of Flammability for Building Materials GB/T 8627 Test Method for Density of Smoke from the Burning or Decomposition of Building Materials GB/T 11785 Reaction to Fire Tests for Floorings - Determination of the Burning Behavior Using a Radiant Heat Source GB/T 14402 Reaction to Fire Tests for Building Materials and Products - Determination of the Heat of Combustion GB/T 16172 Test Method for Heat Release Rate of Building Mate GB/T 17596 Textiles - Commercial Laundering Procedure for Textile Fabrics Prior to Flammability Testing GB 17927.1 Upholstered furniture - Assessment of the Resistance to Ignition of Mattress and Sofa - Part 1.Smouldering Cigarette GB/T 20284 Single Burning Item Test for Building Materials and Products GB/T 20285 Toxic Classification of Fire Effluents Hazard for Materials GB/T 27904 Testing Method for Fire Characteristics of Furniture and Subassemblies Exposed to Flaming Ignition Source

3 Terms and Definitions

For the purposes of this document, the following terms and definitions AND those defined in GB/T 5907 apply. 3.1 Product The building material, composite material or module of which the information is required. 3.2 Material The mixture of single substance or uniform distribution, such as metal, stone, wood, concrete, mineral fiber and polymer. 3.3 Linear pipe thermal insulation product Round pipeline product with insulating property, such as rubber and plastic insulating pipe and fiber glass insulating pipe. 3.4 Homogeneous product Product that is composed of single material or with uniform density and composition inside. 3.5 Non-homogeneous product The product not in accordance with the definition of homogeneous product and composed of one or more categories of substantial or non-substantial component(s). 3.6 Substantial component Substantial substance of non-homogeneous product, such as the material with single-layer surface density ≥1.0kg/m2 or single-layer thickness ≥1.0mm. 3.7 Non-substantial component Secondary structured substance of non-homogeneous product, such as the materials with single-layer surface density< 1.0 kg/m2 and single-layer thickness < 1.0 mm. Directly adjacent two-layer or multi-layer non-substantial components (no substantial component between them) may be regarded as a non-substantial component, when the combination meets the requirements of non-substantial components. 3.8 Internal non-substantial component Non-substantial component with both sides contacting a kind of substantial components at least. 3.9 External non-substantial component Non-substantial component with one side not contacting substantial component(s). 3.10 Flooring Materials or products that may be laid on floor. 3.11 Substrate A certain product in direct contact with the backside (or bottom side) of building products, such as concrete wall surface. 3.12 Standard substrate Product that may represent substrate for practical application. 3.13 Flaming droplets/particles Substance or particles that are separated from sample, during the process of combustion test. 3.14 Critical heat flux CHF The heat radiation flux at the flame quenching position; or the heat radiation flux at the farthest position where the flame can propagate to, when testing for 30 min. 3.15 Fire growth rate index FIGRA Maximum ratio between the heat release rate and the corresponding time of the sample burning. It is used in the classification of burning behavior. 3.16 FIGRA0.2MJ Fire growth rate index where the released heat of sample burning reaches 0.2 MJ. 3.17 FIGRA0.4MJ The fire growth rate index when the released heat of sample burning reaches 0.4 MJ. 3.18 Smoke growth rate index SMOGRA The maximum ratio between the smoke production rate and the corresponding time of the sample burning. 3.19 Smoke toxicity The degree of damage/harm caused by toxic and hazardous substances in smoke.

4 Burning Behavior Grade

5 Burning Behavior Classification Criteria

5.1 Building Materials 5.1.1 Tabular building materials Grades and classification criteria for burning behavior of tabular building materials and products are shown in Table 2.In this table, it is Grade A, if Grades A1 and A2 are met; it is Grade B1, if Grades B and C are met; and it is Grade B2, if Grades D and E are met. 5.1.3 Tubular thermal insulation material Grades of and classification criteria for burning behavior of tubular thermal insulation materials are shown in Table 4.In this table, it is Grade A, if Grades A1 and A2 are met; it is Grade B1, if Grades B and C are met; and it is Grade B2, if Grades D and E are met. 5.2 Building Products 5.2.1 Building products are classified into four categories. 5.2.2 The grades of and classification criteria for burning behavior of curtain, and decorative fabrics of furniture product, etc. are shown in Table 5.For washable fabrics, they shall be washed for at least 5 times before burning behavior test according to those specified in GB/T 17596. 5.2.3 The grades and classification criteria of burning behavior of wire and cable casing as well as enclosures and accessories of electrical equipment are shown in Table 6. 5.2.4 The grades and classification criteria for burning behavior of foamed plastics used for electrical apparatus and furniture products are shown in Table 7.

6 Mark of Burning Behavior Grade

6.1 For the inspected building materials and products that have complied with the requirements of this standard, the corresponding marks of burning behavior grade shall be made on the products or in the instructions. 6.2 The additional information and marks of burning behavior grade for building materials and products are shown in Appendix B.

7 Classification Inspection Report

The following contents shall be included in the classification inspection report. - Number and date of inspection report; - Entrusting party of the inspection report; - Organization that issues the inspection report; - Name and purpose of building materials and products; - Detailed description of building materials and products, including detailed description or drawing for relevant components and assembly method; - Test methods and test results; - Classification methods; - Conclusion. the burning behavior grade of building materials and products; - Relevant instructions of inspection report, see Appendix C; - Signatures of reporting superintendent and the organization’s superintendent. ......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.


      

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