This document specifies the classification and codes, requirements, inspection rules, and marking, packaging, transportation and storage of hardly flammable plywood, and describes the corresponding test methods.
This document is applicable to the production, sale, and inspection of hardly flammable plywood products for general use and hardly flammable decorative veneered plywood products.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions 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.
GB/T 2828.1-2012 Sampling procedures for inspection by attributes - Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
GB/T 5907.1-2014 Fire protection vocabulary - Part 1: General terms
GB 8624-2012 Classification for burning behavior of building materials and products
GB/T 8626-2007 Test method of flammability for building materials
GB/T 17657-2022 Test methods of evaluating the properties of wood-based panels and surface decorated wood-based panels
GB/T 18259-2018 Terminology for wood-based panels and their surface decoration
GB 18580-2017 Indoor decorating and refurbishing materials - Limit of formaldehyde emission of wood-based panels and finishing products
GB/T 19367-2022 Determination of dimensions of wood-based panels
GB/T 20284-2006 Single burning item test for building materials and products
GB/T 20285-2006 Toxic classification of fire effluents hazard for materials
GB/T 39600-2021 Formaldehyde emission grading for wood-based panel and finishing products
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 5907.1-2014, GB 8624-2012, GB/T 8626-2007, GB/T 9846-2015, GB/T 18259-2018 and GB/T 20284-2006 as well as the following apply.
3.1
hardly flammable plywood
plywood for general use and decorative veneered plywood that have undergone flame retardant treatment and meet the requirements for hardly flammable grade in terms of burning performance
3.2
burning performance
reaction characteristics of a material or substance to fire under specified conditions
[Source: GB/T 5907.1-2014, 2.25, modified]
3.3
combustibility
characteristic of a material that can be ignited and have sustained flaming under specified test conditions
[Source: GB/T 5907.1-2014, 2.54]
3.4
flaming droplets/particles
substances or particles separated from the specimen during the combustion test
[Source: GB 8624-2012, 3.13]
3.5
fire growth rate index; FIGRA
maximum value of the ratio of the heat release rate of a specimen during combustion to its corresponding time, used for classifying burning performance
Note: The fire growth rate index (0.2 MJ), i.e., FIGRA0.2 MJ, refers to the FIGRA when the heat release of the specimen reaches 0.2 MJ. The fire growth rate index (0.4 MJ), i.e., FIGRA0.4 MJ, refers to the FIGRA when the heat release of the specimen reaches 0.4 MJ.
[Source: GB 8624-2012, 3.15, modified]
3.6
smoke growth rate index; SMOGRA
maximum value of the ratio of the smoke generation rate of a specimen during combustion to its corresponding time
[Source: GB 8624-2012, 3.18]
3.7
smoke toxicity
degree of injury/harm caused by toxic and harmful substances in smoke
[Source: GB 8624-2012, 3.19]
4 Classification and codes
4.1 By burning performance grade:
a) The hardly flammable plywood that meets Grade B within Grade B1 specified in GB 8624-2012 is represented by the code B1(B);
b) The hardly flammable plywood that meets Grade C within Grade B1 specified in GB 8624-2012 is represented by the code B1(C).
4.2 By smoke generation characteristics:
a) The hardly flammable plywood that meets Grade s1 specified in GB 8624-2012 is represented by the codes B1(B-s1) or B1(C-s1);
b) The hardly flammable plywood that meets Grade s2 specified in GB 8624-2012 is represented by the codes B1(B-s2) or B1(C-s2);
c) The hardly flammable plywood that meets Grade s3 specified in GB 8624-2012 is represented by the codes B1(B-s3) or B1(C-s3).
4.3 By smoke toxicity:
a) The hardly flammable plywood that meets Grade t0 specified in GB 8624-2012 is represented by the codes B1(B-t0) or B1(C-t0);
b) The hardly flammable plywood that meets Grade t1 specified in GB 8624-2012 is represented by the codes B1(B-t1) or B1(C-t1);
c) The hardly flammable plywood that meets Grade t2 specified in GB 8624-2012 is represented by the codes B1(B-t2) or B1(C-t2).
4.4 By flaming droplets/particles grade:
a) The hardly flammable plywood that meets Grade d0 specified in GB 8624-2012 is represented by the codes B1(B-d0) or B1(C-d0);
b) The hardly flammable plywood that meets Grade d1 specified in GB 8624-2012 is represented by the codes B1(B-d1) or B1(C-d1);
c) The hardly flammable plywood that meets Grade d2 specified in GB 8624-2012 is represented by the codes B1(B-d2) or B1(C-d2).
Contents Foreword II 1 Scope 2 Normative references 3 Terms and definitions 4 Classification and codes 5 Requirements 6 Test methods 7 Inspection rules 8 Marking, packaging, transportation and storage
Hardly flammable plywood
1 Scope
This document specifies the classification and codes, requirements, inspection rules, and marking, packaging, transportation and storage of hardly flammable plywood, and describes the corresponding test methods.
This document is applicable to the production, sale, and inspection of hardly flammable plywood products for general use and hardly flammable decorative veneered plywood products.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions 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.
GB/T 2828.1-2012 Sampling procedures for inspection by attributes - Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
GB/T 5907.1-2014 Fire protection vocabulary - Part 1: General terms
GB 8624-2012 Classification for burning behavior of building materials and products
GB/T 8626-2007 Test method of flammability for building materials
GB/T 9846-2015 Plywood for general use
GB/T 15104-2021 Decorative veneered wood-based panel
GB/T 17657-2022 Test methods of evaluating the properties of wood-based panels and surface decorated wood-based panels
GB/T 18259-2018 Terminology for wood-based panels and their surface decoration
GB 18580-2017 Indoor decorating and refurbishing materials - Limit of formaldehyde emission of wood-based panels and finishing products
GB/T 19367-2022 Determination of dimensions of wood-based panels
GB/T 20284-2006 Single burning item test for building materials and products
GB/T 20285-2006 Toxic classification of fire effluents hazard for materials
GB/T 39600-2021 Formaldehyde emission grading for wood-based panel and finishing products
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 5907.1-2014, GB 8624-2012, GB/T 8626-2007, GB/T 9846-2015, GB/T 18259-2018 and GB/T 20284-2006 as well as the following apply.
3.1
hardly flammable plywood
plywood for general use and decorative veneered plywood that have undergone flame retardant treatment and meet the requirements for hardly flammable grade in terms of burning performance
3.2
burning performance
reaction characteristics of a material or substance to fire under specified conditions
[Source: GB/T 5907.1-2014, 2.25, modified]
3.3
combustibility
characteristic of a material that can be ignited and have sustained flaming under specified test conditions
[Source: GB/T 5907.1-2014, 2.54]
3.4
flaming droplets/particles
substances or particles separated from the specimen during the combustion test
[Source: GB 8624-2012, 3.13]
3.5
fire growth rate index; FIGRA
maximum value of the ratio of the heat release rate of a specimen during combustion to its corresponding time, used for classifying burning performance
Note: The fire growth rate index (0.2 MJ), i.e., FIGRA0.2 MJ, refers to the FIGRA when the heat release of the specimen reaches 0.2 MJ. The fire growth rate index (0.4 MJ), i.e., FIGRA0.4 MJ, refers to the FIGRA when the heat release of the specimen reaches 0.4 MJ.
[Source: GB 8624-2012, 3.15, modified]
3.6
smoke growth rate index; SMOGRA
maximum value of the ratio of the smoke generation rate of a specimen during combustion to its corresponding time
[Source: GB 8624-2012, 3.18]
3.7
smoke toxicity
degree of injury/harm caused by toxic and harmful substances in smoke
[Source: GB 8624-2012, 3.19]
4 Classification and codes
4.1 By burning performance grade:
a) The hardly flammable plywood that meets Grade B within Grade B1 specified in GB 8624-2012 is represented by the code B1(B);
b) The hardly flammable plywood that meets Grade C within Grade B1 specified in GB 8624-2012 is represented by the code B1(C).
4.2 By smoke generation characteristics:
a) The hardly flammable plywood that meets Grade s1 specified in GB 8624-2012 is represented by the codes B1(B-s1) or B1(C-s1);
b) The hardly flammable plywood that meets Grade s2 specified in GB 8624-2012 is represented by the codes B1(B-s2) or B1(C-s2);
c) The hardly flammable plywood that meets Grade s3 specified in GB 8624-2012 is represented by the codes B1(B-s3) or B1(C-s3).
4.3 By smoke toxicity:
a) The hardly flammable plywood that meets Grade t0 specified in GB 8624-2012 is represented by the codes B1(B-t0) or B1(C-t0);
b) The hardly flammable plywood that meets Grade t1 specified in GB 8624-2012 is represented by the codes B1(B-t1) or B1(C-t1);
c) The hardly flammable plywood that meets Grade t2 specified in GB 8624-2012 is represented by the codes B1(B-t2) or B1(C-t2).
4.4 By flaming droplets/particles grade:
a) The hardly flammable plywood that meets Grade d0 specified in GB 8624-2012 is represented by the codes B1(B-d0) or B1(C-d0);
b) The hardly flammable plywood that meets Grade d1 specified in GB 8624-2012 is represented by the codes B1(B-d1) or B1(C-d1);
c) The hardly flammable plywood that meets Grade d2 specified in GB 8624-2012 is represented by the codes B1(B-d2) or B1(C-d2).
Contents of GB/T 18101-2024
Contents
Foreword II
1 Scope
2 Normative references
3 Terms and definitions
4 Classification and codes
5 Requirements
6 Test methods
7 Inspection rules
8 Marking, packaging, transportation and storage
