GB/T 11785-1989 Determination of critical radiant flux of floor covering materials - Radiant heat source method
Some standard content:
1CS59.080.60
National Standard of the People's Republic of China
GB/T11785—2005/ISO9239-1:2002 replaces GB/T11785-1989
Reaction to fire tests for flooringsDetermination of the burning behaviour using a radiant heat source method source(ISO9239-1:2002,IDT)
2005-09-28 Issued
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Standardization Administration of China
2006-04-01 Implementation
GB/T11785-2005/IS09239-1:2002 Foreword
ISO Foreword
EN Foreword
Normative references
Terms and definitions
Test equipment
State adjustment Section
Test procedure
Test results
9Test report
Appendix A (Normative Appendix)
Appendix B (Informative Appendix)
Appendix C (Informative Appendix)
Smoke measurement
Verification of test method
Supply of gas and air
GB/T11785—2005/ISO9239-1:2002 This standard is equivalent to ISO9239-1:2002 "Combustion performance of floor covering materials Part 1: Measurement of combustion performance by radiant heat source method". This standard is a test method jointly developed by the International Organization for Standardization ISO/TC92 and the European Committee for Standardization. It only evaluates the combustion performance of materials under laboratory test conditions and cannot be used alone to describe or evaluate the fire hazard of materials under actual fire conditions, nor can it be used as the only basis for effective evaluation of the combustion hazard of materials. This standard replaces GB/T11785-1989 "Determination of critical auxiliary radiation flux of paving materials by radiation heat source method".
Compared with GB/T11785-1989, this standard has the following main changes: 1. The concept of critical radiation flux when the flame is extinguished is added. (See Chapter 3) The maximum test time is 30 minutes, and the radiation flux value at the flame extinguishing point or the radiation flux value at the corresponding position of the flame front after 30 minutes of testing is taken as the critical radiation flux. (See Chapter 3 and Chapter 7) The wind speed in the flue of the body is changed to (2.5±0.2) m/s, and the original standard requires (1.22±0.02) m/s. (See Chapter 4) The opening position on the calibration plate starts from 110mm, and a hole with a diameter of (26±1) mm is opened every 100mm until 910mm. Different from the original standard starting from 100mm to 900mm. (See Chapter 4) - The igniter for igniting the sample in the test device is 250mm long and consists of 35 small holes in two rows. The original standard is a commercially available Venturitorch blowtorch with an opening diameter of (0.075±0.003) mm. In the test procedure, there is no requirement for specific box temperature values and black body temperature values. It is only required that the box temperature and black body temperature of each test should not exceed the error range of the temperature during calibration, and the required deviation range is different. (See Chapter 7) - The installation requirements for the block material are added. (See Chapter 5) - The test process adds the smoke density value in the test box flue. (See Chapter 7) Appendix A of this standard is a normative appendix, and Appendix B and Appendix C are informative appendices. This standard is proposed by the Ministry of Public Security of the People's Republic of China. This standard is under the jurisdiction of the Seventh Sub-Technical Committee of the National Fire Standardization Technical Committee (SAC/TC113/SC7). The responsible drafting unit of this standard: Sichuan Fire Research Institute of the Ministry of Public Security. Participating drafting units of this standard: Shaanxi Textile Science Research Institute Main drafters of this standard: Zhao Chenggang, Zeng Xubin, Ma Fu. The previous versions of the standards replaced by this standard are: -GB/T11785-1989.
GB/T11785-2005/ISO9239-1:2002ISO Foreword
The International Organization for Standardization (ISO) is a worldwide federation of national standardization bodies (ISO group members). The drafting and formulation of international standards is completed through ISO's technical committees, and each group member has the right to participate in the work of the technical committee. Whether it is a governmental or non-governmental international organization, as long as it has established a liaison relationship with ISO, it can participate in ISO work. ISO and the International Electrotechnical Commission (IEC) have maintained close cooperation in all aspects of electrical standardization. The drafting of international standards is based on the requirements of Part 3 of the ISO/IEC Preparation Procedures. The draft international standards adopted by the technical committee are distributed to each group member for voting, and must be approved by at least 75% of the group members before they can be published as formal international standards. It should be noted that some of the principles of ISO 9239-1 may be subject to intellectual property rights. ISO is not responsible for identifying any or all of the intellectual property rights involved.
International Standard ISO 9239-1 was developed by the European Committee for Standardization (CEN) in collaboration with ISO Technical Committee ISO/TC 92\Fire safety\SC1\Initiation and development of fire\, and ISO and CEN cooperate in accordance with the provisions of the Convention of Venetian.
Throughout this text, "European Standard" means "International Standard". This is the second edition, which has been revised in terms of technical content and replaces and annuls the first edition ISO 9239-1:1997. ISO 9239 contains the following two parts under the general title "Combustion behaviour of floor coverings": - Part 1: Measurement of combustion behaviour using a radiant heat source; Part 2: Measurement of flame spread at a thermal radiation of 25 kW/m2. Annex A of this standard is normative, while Annex B and Annex C are informative. EN Foreword
GB/T11785-2005/IS09239-1:2002ENISO9239-1:2002 Standard was prepared by Technical Committee BSICEN/TC127\Fire Safety in Buildings and Technical Committee ISO/TC92\Fire Safety.
This European Standard shall obtain the status of an international standard by the publication of a formal document or by written approval at the latest by July 2002 and conflicting international standards shall be withdrawn at the latest by November 2003. In accordance with the CEN/CENELEC Internal Regulations, the following Member States of the International Organization for Standardization are bound to implement this European Standard: Austria, Belgium, Czechoslovakia, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. 1 Scope
GB/T11785—2005/IS09239-12002 Determination of Combustion Performance of Flooring Materials
Radiant Heat Source Method
This standard specifies the method for evaluating the combustion performance of flooring materials. This method is to ignite the flooring materials placed horizontally and exposed to the inclined heat source in the test combustion box with a small flame to evaluate its flame propagation ability. This method is applicable to various flooring materials, such as textile carpets, cork boards, wooden boards, rubber boards, plastic floors and floor spray materials. The results can reflect the combustion performance of flooring materials (including substrates). Changes in backing materials, base materials or other aspects of flooring materials may affect the test results.
This standard is applicable to testing and describing the combustion performance of flooring materials under controlled laboratory conditions. It is not a method used alone to describe and evaluate the fire hazard of flooring materials under actual fire conditions. :. Appendix B gives the verification of the accuracy of this test method. 2 Normative references
The clauses in the following documents become clauses of this standard through reference in this standard. For any dated referenced document, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, parties that reach an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For any undated referenced document, the latest version applies to this standard. EN13238 General provisions for state adjustment procedures and selection of substrates for combustion performance tests of building products 3 Terms and definitions
The following terms and definitions apply to this standard. 3.1
Radiant flux (kW/m2) heatflux (kW/m) Human radiant heat per unit area, including radiant heat flux and convective heat flux. 3.2
Critical radiation flux at extinguishment (CHF) criticalheatfluxatextinguishment (CHF) The radiation flux corresponding to the position on the specimen surface where the flame stops propagating and extinguishes (kW/m\). 3.3
Radiation flux at X minutes (HF-X) heatfluxatXmin (HF-X) The radiation flux corresponding to the farthest distance of flame propagation on the specimen when the test starts for one minute (kW/m). 3.4
Critical radiation flux criticalheatflux The radiation flux at the flame extinguishment (CHF) or the radiation flux corresponding to the farthest position to which the flame propagates during the test for 30 minutes (HF30), the lowest of the two (i.e. the radiation flux corresponding to the farthest distance of flame propagation within 30 minutes). 3.5
Radiation flux distribution curve fluxprofile The relationship curve between the distance of each point on the surface of the radiation plate from the zero point and the radiation flux. The stupid point in the radiation flux curve corresponds to the inner edge of the hot end of the specimen fixture. 3.6
sustained flaming
Sustained flame
Flames that continue to burn for more than 4 seconds on or above the specimen. Distance of flame spread distanceofflamespreadThe maximum distance that a sustained flame spreads along the length of the specimen within a specified time. GB/T11785—2005/IS09239-1;20023.8
Flooring
Surface decorative layer laid on the upper surface of the floor, composed of backing material, accompanying pad, middle pad and/or adhesive. 3.9
Substratesubstrate
Material used directly under the product and meeting the corresponding requirements. For flooring, it refers to the floor (the laying on the floor) or the material representing the floor.
4 Test apparatus
4.1 The test apparatus must be placed at least 0.4 m from the wall and ceiling. The dimensions of the apparatus are given in Figures 2 to 5. The test box is composed of a calcium silicate board with a thickness of (13 ± 1) mm and a nominal density of 650 kg/m3 and a fireproof glass with a size of (110 ± 10) mm × (1100 ± 100) mm. The fireproof glass is installed in the front of the box so that the entire length of the specimen can be observed during the test. A metal protective layer can be installed on the outside of the test box. Below the observation window, a tightly closed door is installed, which allows the specimen platform to be moved in or out. From the inner edge of the specimen fixture, a steel ruler with a scale interval of 50 mm and 10 mm should be installed on both sides of the specimen respectively. 4.2 The bottom of the test box is composed of a sliding platform, which can strictly ensure that the specimen fixture is in a fixed horizontal position (Figure 1). The total air flow area between the test chamber and the specimen fixture should be (0.23 ± 0.03) m and evenly distributed on both sides of the long side of the specimen. Lighting device:
Smoke exhaust duct:
Light receiver;
Smoke hood:
Test chamber;
Transmission plate:
Ignition flame ejected from the igniter;
Steel ruler;
Test specimen and specimen fixture together with sliding platform
Air inlet at the bottom of the test chamber,
Figure 1 Perspective view of the test device
Smoke exhaust duct:
Smoke hood;
Test chamber ;
Ray board;
A test piece and test piece fixture;
Observation window;
Test piece entrance and exit door;
GB/T117852005/ISO9239-1;2002Unit is mm
Radiation thermometer:
Lighting device;
10 calibration filter slots;
Light receiver,
Box smoke,
Purified air supply pipe.
Figure 5 is a B-B sectional view.
Figure 4 is a cross-sectional view of A-A
Figure 2 Front view and top view of the test device
GB/T11785-2005/IS09239-1.2002 Smoke exhaust duct:
Lighting device:
Steel pipe for light measurement system;
Light receiver;
Rubber ring,
Calibration filter
Smoke collector;
Test piece and test piece fixture:
"Test box,
Test piece inlet and outlet door;
Purified air supply pipe.
1200±10
Cross-sectional view of test device A-A (see also Figure 2) Unit is mm
Anemometer measurement position;
Measurement beam;
Box flue;
Thermoelectric:
Test box;
A radiation board;
Radiation surface;
Ignitor,
Test piece and test piece fixture;
10~A radiation pyrometer.
380±5
300±10
Note: 8 is the measurement dimension from the exposed surface of the test piece to the edge of the last ray of the radiation board. to
GB/T11785—2005/IS09239-1:2002Unit is mm
Figure 4 Test load A A-Part view
4.3 The radiation heat source is a porous fire-resistant board installed in a metal frame. Its radiation surface size is (300±10) mm×(450±10) mm. The radiation board should be able to withstand a high temperature of 900℃, and the air and gas mixing system must be equipped with an appropriate device to ensure the stability and reproducibility of the test (see Appendix B).
GB/T11785—2005/IS09239-1:2002 The radiation heating board is installed above the specimen fixture, and the angle between its long side and the horizontal direction is (30±1) (see Figure 5). 102±5
60±10
Opening of optical measurement system;||t t||Box flue:
Thermocouple:
Test box,
Radiation board:
Radiation surface,
One steel ruler;
Test piece and test piece fixture;
Test piece sliding platform
Radiation pyrometer.
100±5
1400±10
Test distance from equal point (near edge of test piece fixture) to the inner surface of the test box. h
Test distance from the edge of the radiation board to the inner surface of the test box. o
190±10
Figure 5 Test load BB view
90±10%
Unit is mm4m away, the dimensions of the apparatus are given in Figures 2 to 5. The test chamber is composed of calcium silicate board with a thickness of (13 ± 1) mm and a nominal density of 650 kg/m3 and fireproof glass with a size of (110 ± 10) mm × (1100 ± 100) mm. The fireproof glass is installed in the front of the chamber so that the entire length of the specimen can be observed during the test. A metal protective layer can be installed on the outside of the test chamber. Below the observation window, a tightly closed door is installed, thereby allowing the specimen platform to be moved in or out. From the inner edge of the specimen fixture, steel rulers with scale intervals of 50 mm and 10 mm should be installed on both sides of the specimen respectively. 4.2 The bottom of the test chamber is composed of a sliding platform, which can strictly ensure that the specimen fixture is in a fixed horizontal position (Figure 1). The total air circulation area between the test chamber and the specimen fixture should be (0.23 ± 0.03) m2 and evenly distributed on both sides of the long side of the specimen. Lighting device:
Smoke exhaust duct:
Light receiver;
Smoke hood:
Test chamber;
Transmission plate:
Ignition flame ejected from the igniter;
Steel ruler;
Test piece and test piece fixture together with sliding platform
Air inlet at the bottom of the test chamber,
Figure 1 Perspective view of the test device
Smoke exhaust duct:
Smoke hood;
Test chamber ;
Ray board;
A test piece and test piece fixture;
Observation window;
Test piece entrance and exit door;
GB/T117852005/ISO9239-1;2002Unit is mm
Radiation thermometer:
Lighting device;
10 calibration filter slots;
Light receiver,
Box smoke,
Purified air supply pipe.
Figure 5 is a B-B sectional view.
Figure 4 is a cross-sectional view of A-A
Figure 2 Front view and top view of the test device
GB/T11785-2005/IS09239-1.2002 Smoke exhaust duct:
Lighting device:
Steel pipe for light measurement system;
Light receiver;
Rubber ring,
Calibration filter
Smoke collector;
Test piece and test piece fixture:
"Test box,
Test piece inlet and outlet door;
Purified air supply pipe.wwW.bzxz.Net
1200±10
Cross-sectional view of test device A-A (see also Figure 2) Unit is mm
Anemometer measurement position;
Measurement beam;
Box flue;
Thermoelectric:
Test box;
A radiation board;
Radiation surface;
Ignitor,
Test piece and test piece fixture;
10~A radiation pyrometer.
380±5
300±10
Note: 8 is the measurement dimension from the exposed surface of the test piece to the edge of the last ray of the radiation board. to
GB/T11785—2005/IS09239-1:2002Unit is mm
Figure 4 Test load A A-Part view
4.3 The radiation heat source is a porous fire-resistant board installed in a metal frame. Its radiation surface size is (300±10) mm×(450±10) mm. The radiation board should be able to withstand a high temperature of 900℃, and the air and gas mixing system must be equipped with an appropriate device to ensure the stability and reproducibility of the test (see Appendix B).
GB/T11785—2005/IS09239-1:2002 The radiation heating board is installed above the specimen fixture, and the angle between its long side and the horizontal direction is (30±1) (see Figure 5). 102±5
60±10
Opening of optical measurement system;||t t||Box flue:
Thermocouple:
Test box,
Radiation board:
Radiation surface,
One steel ruler;
Test piece and test piece fixture;
Test piece sliding platform
Radiation pyrometer.
100±5
1400±10
Test distance from equal point (near edge of test piece fixture) to the inner surface of the test box. h
Test distance from the edge of the radiation board to the inner surface of the test box. o
190±10
Figure 5 Test load BB view
90±10%
Unit is mm4m away, the dimensions of the apparatus are given in Figures 2 to 5. The test chamber is composed of calcium silicate board with a thickness of (13 ± 1) mm and a nominal density of 650 kg/m3 and fireproof glass with a size of (110 ± 10) mm × (1100 ± 100) mm. The fireproof glass is installed in the front of the chamber so that the entire length of the specimen can be observed during the test. A metal protective layer can be installed on the outside of the test chamber. Below the observation window, a tightly closed door is installed, thereby allowing the specimen platform to be moved in or out. From the inner edge of the specimen fixture, steel rulers with scale intervals of 50 mm and 10 mm should be installed on both sides of the specimen respectively. 4.2 The bottom of the test chamber is composed of a sliding platform, which can strictly ensure that the specimen fixture is in a fixed horizontal position (Figure 1). The total air circulation area between the test chamber and the specimen fixture should be (0.23 ± 0.03) m2 and evenly distributed on both sides of the long side of the specimen. Lighting device:
Smoke exhaust duct:
Light receiver;
Smoke hood:
Test chamber;
Transmission plate:
Ignition flame ejected from the igniter;
Steel ruler;
Test piece and test piece fixture together with sliding platform
Air inlet at the bottom of the test chamber,
Figure 1 Perspective view of the test device
Smoke exhaust duct:
Smoke hood;
Test chamber ;
Ray board;
A test piece and test piece fixture;
Observation window;
Test piece entrance and exit door;
GB/T117852005/ISO9239-1;2002Unit is mm
Radiation thermometer:
Lighting device;
10 calibration filter slots;
Light receiver,
Box smoke,
Purified air supply pipe.
Figure 5 is a B-B sectional view.
Figure 4 is a cross-sectional view of A-A
Figure 2 Front view and top view of the test device
GB/T11785-2005/IS09239-1.2002 Smoke exhaust duct:
Lighting device:
Steel pipe for light measurement system;
Light receiver;
Rubber ring,
Calibration filter
Smoke collector;
Test piece and test piece fixture:
"Test box,
Test piece inlet and outlet door;
Purified air supply pipe.
1200±10
Cross-sectional view of test device A-A (see also Figure 2) Unit is mm
Anemometer measurement position;
Measurement beam;
Box flue;
Thermoelectric:
Test box;
A radiation board;
Radiation surface;
Ignitor,
Test piece and test piece fixture;
10~A radiation pyrometer.
380±5
300±10
Note: 8 is the measurement dimension from the exposed surface of the test piece to the edge of the last ray of the radiation board. to
GB/T11785—2005/IS09239-1:2002Unit is mm
Figure 4 Test load A A-Part view
4.3 The radiation heat source is a porous fire-resistant board installed in a metal frame. Its radiation surface size is (300±10) mm×(450±10) mm. The radiation board should be able to withstand a high temperature of 900℃, and the air and gas mixing system must be equipped with an appropriate device to ensure the stability and reproducibility of the test (see Appendix B).
GB/T11785—2005/IS09239-1:2002 The radiation heating board is installed above the specimen fixture, and the angle between its long side and the horizontal direction is (30±1) (see Figure 5). 102±5
60±10
Opening of optical measurement system;||t t||Box flue:
Thermocouple:
Test box,
Radiation board:
Radiation surface,
One steel ruler;
Test piece and test piece fixture;
Test piece sliding platform
Radiation pyrometer.
100±5
1400±10
Test distance from equal point (near edge of test piece fixture) to the inner surface of the test box. h
Test distance from the edge of the radiation board to the inner surface of the test box. o
190±10
Figure 5 Test load BB view
90±10%
Unit is mm
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