GB/T 41879-2022 (GB/T41879-2022, GBT 41879-2022, GBT41879-2022) & related versions
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Plastics -- Burning behaviour -- Intermediate-scale fire-resistancetesting of fibre-reinforced polymer composites
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GB/T 41879-2022
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GBT 41879-2022
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GB/T 41879-2022: PDF in English (GBT 41879-2022)
GB/T 41879-2022
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 83.080.01
CCS G 31
Plastics - Burning behavior - Intermediate-scale fire-
resistance testing of fiber-reinforced polymer composites
塑料 燃烧性能 纤维增强聚合物
(ISO 30021:2013, MOD)
ISSUED ON: OCTOBER 12, 2022
IMPLEMENTED ON: OCTOBER 12, 2022
Issued by: State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
Introduction ... 5
1 Scope ... 6
2 Normative references ... 6
3 Terms and definitions ... 7
4 General rule ... 7
5 Instruments and equipment ... 7
6 Specimens ... 8
7 Conditioning and test environment ... 8
8 Test steps ... 9
9 Test report ... 12
References ... 14
Plastics - Burning behavior - Intermediate-scale fire-
resistance testing of fiber-reinforced polymer composites
Warning -- All persons involved in the management and conduct of the fire
resistance test shall pay attention that toxic and/or harmful smoke and gases may
be released during the test, which is dangerous. There is also a risk of mechanical
injury during the construction of test assemblies or devices, testing and disposal of
residues and waste. It is critical to assess all potential hazards and health risks,
and to identify and provide safety precautions. In addition, it is essential to issue
written safe operating procedures and train relevant personnel to ensure that all
personnel in the laboratory follow the procedures at all times.
1 Scope
This document describes a method for the determination of the fire resistance of non-
loadbearing individual members made of fibre-reinforced plastics (FRP) when being
heated on one side.
This document applies to FRP products whose end-use dimensions are generally
smaller than those specified in GB/T 9978.1, such as fire barriers used in the
transportation industry.
This document applies to FRP products with a substantially flat surface, and also to
sandwich panel members containing reinforced components and surfaces made of FRP.
2 Normative references
The following documents contain the provisions which, through normative reference in
this document, constitute the essential provisions of this document. For the dated
referenced documents, only the versions with the indicated dates are applicable to this
document; for the undated referenced documents, only the latest version (including all
the amendments) is applicable to this document.
GB/T 2035 Terms and definitions for plastics (GB/T 2035-2008, ISO 472:1999,
IDT)
GB/T 5907.2 Fire protection vocabulary - Part 2: Fire prevention
GB/T 9978.1 Fire-resistance tests－Elements of building construction－Part 1:
General requirements (GB/T 9978.1-2008, ISO 834-1:1999, MOD)
ISO 834-12 Fire resistance tests - Elements of building construction - Part 12:
Specific requirements for separating elements evaluated on less than full scale
furnaces
EN 1363-2 Fire resistance tests - Part 2: Alternative and additional procedures
3 Terms and definitions
The terms and definitions defined in GB/T 2035, GB/T 5907.2, and ISO 834-12 apply
to this document.
4 General rule
The fire resistance of a vertically or horizontally oriented intermediate-scale specimen
is determined by exposing its surfaces to the conditions specified in ISO 834-12. The
time-temperature curve specified in EN 1363-2 can also be used when it needs to be
related to the end-use conditions of the product under test.
5 Instruments and equipment
5.1 General requirements
The test equipment shall include combustion furnaces, restraints and support frames,
and other instruments in accordance with GB/T 9978.1 or ISO 834-12, and contain
specimen mounting frames in accordance with 5.2.
5.2 Specimen mounting frame
The specimen mounting frame (hereinafter referred to as the frame) shall be made of
non-combustible materials, namely steel or concrete. During the test, the structure of
the frame shall be strong enough to support the specimen at a high temperature.
Deformation of the frame shall not adversely affect the specimen.
NOTE: The specimen is not stressed in this test.
The frame lining in direct contact with the specimen shall be made of non-combustible
materials, such as calcium silicate board, with a dry density of (950±100) kg/m3 and a
minimum thickness of 50 mm. When the test is carried out under the high-temperature
conditions specified in ISO 834-12, the frame shall be strong enough to support the
specimen.
6 Specimens
6.1 Number of specimens
For symmetrical structures or members requiring fire protection only from one specific
side, one specimen shall be tested. For asymmetric structures requiring fire protection
on both sides, two specimens shall be tested so that each side of the member is exposed
to flame.
6.2 Dimensions
The vertical and horizontal dimensions of the specimen should not be less than
(1000±30) mm. The configuration of the specimen shall be representative of the end
use of the member, for which purpose the size of the specimen shall be increased to that
of the end use condition. The length and width of the FRP specimen mounted in the
vertical and horizontal directions should be 1.5 m. The specimen shall be mounted in
such a way as to reflect the end-use conditions, including when there are reinforcing
members and/or thermal insulation systems.
6.3 Structure
The specimens should include all reinforcing members that are parts of the end-use
configuration of the FRP product.
NOTE: ISO 10295-1 specifies fire resistance tests for penetration-proof seals in building elements.
6.4 Thermal insulation of specimens
In the end use, an additional thermal insulation system is required on the FRP member,
and such FRP members need to have fire resistance. If the additional thermal insulation
system is used under the end-use conditions, the thermal insulation system shall be
mounted and fixed on the specimen as closely as possible to the end-use condition.
The thermal insulation system is usually mounted on the side where the fire risk is
greater. During the test, the thermal insulating side of the specimen shall be exposed to
the combustion furnace.
In the thermal insulation system representative of end-use conditions, the specimen
shall be provided with a vertical joint and/or a horizontal joint.
7 Conditioning and test environment
The specimen shall be conditioned for at least 24 hours at a temperature of (23±2) °C
and a relative humidity of 50%~75%, and shall be tested in an environment with a
The furnace temperature controlled by the thermocouple (8.2) shall comply with the
temperature conditions specified in GB/T 9978.1. The time-temperature curve specified
in EN 1363-2 can also be used when it needs to be related to the end-use conditions of
the product under test.
8.7 Measurement and observation
8.7.1 Temperature and pressure
The temperature and furnace pressure of all thermocouples shall be measured and
recorded in accordance with the provisions of GB/T 9978.1 or ISO 834-12, and the
recording interval shall not exceed 1 min.
8.7.2 Smoke and gas penetration
Observe the deformation of the specimen, the penetration of smoke and/or hot gas
through the specimen and other phenomena (if any), and record the time of occurrence.
The penetration of hot gas shall be checked with absorbent cotton.
8.7.3 Deformation and formation of holes and cracks
When measuring, attention shall be paid to the generation and development of holes or
cracks on the unexposed surface of the specimen, because this problem will be
considered when determining the integrity time (that is, the time when holes and cracks
lead to integrity failure); the integrity time shall be determined and recorded in
accordance with GB/T 9978.1.
8.7.4 Deflection
During the test, the deflection of the center of the specimen shall be measured at least
once per minute, and the deflection measurement accuracy shall be ±2 mm.
NOTE: The application guidance on deflection measurement has been given in GB/T 9978.1.
8.7.5 Photographing
During the test and after the test, the specimen shall be photographed, and the date and
time of photographing shall be recorded.
NOTE: A video recording of the unexposed surface is useful for recording the time when integrity failure
occurs.
8.8 Test termination
According to the provisions of GB/T 9978.1, the test of FRP specimens may be
terminated due to one or more of the following reasons:
a) There is a safety problem for personnel or the equipment is about to be damaged;
b) The failure criteria specified in the product standard are met;
c) The entrusting party requests it.
However, in the case of b), the test can be continued to obtain more data.
8.9 Observation after the test
After the test, the condition of and any damage to the specimen, including the thermal
insulation system, shall be observed and recorded.
9 Test report
The test report shall include the following contents:
a) the document number;
b) test date;
c) laboratory name and address;
d) the name and address of the test-entrusting party;
e) the name and address of the manufacturer of the product;
f) the name and/or trademark (if any) of the product;
g) assembly steps, construction details and components (including reinforcing
members) of the specimen, with accompanying drawings (including
dimensions of the components) and, if possible, photos;
h) the general structure of the composite material, such as the number of layers,
thickness, and composition;
i) all information pertaining to the position of the thermocouple on the unexposed
surface and its method of connection to the specimen;
j) heating conditions, such as the time-temperature curve of GB/T 9978.1 or EN
1363-2;
k) test duration;
l) temperature and pressure measurement results and the graph plotted along the
running time of the test;
......
| Standard ID | GB/T 41879-2022 (GB/T41879-2022) | | Description (Translated English) | Plastics -- Burning behaviour -- Intermediate-scale fire-resistancetesting of fibre-reinforced polymer composites | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G31 | | Classification of International Standard | 83.080.01 | | Word Count Estimation | 10,145 | | Date of Issue | 2022-10-14 | | Date of Implementation | 2022-10-12 | | Drafting Organization | Sinopec (Beijing) Chemical Research Institute Co., Ltd., Guangdong Product Quality Supervision and Inspection Research Institute, Zhonglan Chenguang Chengdu Testing Technology Co., Ltd., Guangzhou Quality Supervision and Testing Research Institute, Qianshi Standard Technical Service (Suzhou) Co., Ltd., Zhejiang Huafon New Materials Co., Ltd., Zhejiang Ruigao New Material Co., Ltd., Dongguan Zhongbiao Technology Co., Ltd., Qingdao Product Quality Inspection Research Institute, Shandong Yuanshi New Material Co., Ltd., Jilin Province Product Quality Supervision and Inspection Institute, CGN Juner (Zhejiang) New Materials Co., Ltd., Liaocheng University, Guangdong Shuangla Intelligent Manufacturing Technology Co., Ltd., Anhui Montel Cable Group Co., Ltd. | | Administrative Organization | National Plastics Standardization Technical Committee (SAC/TC 15) | | Proposing organization | China Petroleum and Chemical Industry Federation | | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Management Committee |
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