IEC 60695 11 10 Edition 2 0 2013 05 INTERNATIONAL STANDARD NORME INTERNATIONALE Fire hazard testing – Part 11 10 Test flames – 50 W horizontal and vertical flame test methods Essais relatifs aux risqu[.]
Vertical and horizontal testing
Fire tests conducted on materials under specified conditions are crucial for comparing the burning behavior of various materials, managing manufacturing processes, and evaluating changes in burning characteristics The outcomes of these fire test methods are influenced by the shape and orientation of the test specimen, the surrounding environment, and the ignition conditions.
The key aspect of fire test methods is the positioning of test specimens, which can be either horizontal or vertical This arrangement allows for the differentiation of various classes of material flammability.
NOTE 1 The results obtained by the horizontal burning (HB) and vertical burning (V) methods are not equivalent
The results from the HB and V methods differ from the 5VA and 5VB burning tests outlined in IEC 60695-11-20, as the thermal power of the test flame in these methods is 50 W, compared to 500 W in the IEC standard.
Limitations on the use of test results
Results obtained in accordance with this standard shall not be used solely to describe or appraise the fire hazard presented by a particular material under actual fire conditions
Evaluating fire hazards involves analyzing various factors, including the contribution of fuel, the intensity of burning measured by the rate of heat release, the products of combustion, and environmental conditions Key elements to consider are the type of ignition source, the orientation of materials exposed to fire, and the ventilation conditions present.
Physical properties that can affect burning behaviour
Burning behaviour, as measured by these test methods, is affected by such factors as density, any anisotropy of the material and the thickness of the test specimen.
Shrinkage and distortion
Certain test specimens may shrink from or be distorted by the applied flame without igniting
To achieve valid results, it is necessary to use additional test specimens of the same thickness If valid results cannot be obtained at this thickness, the materials tested at that specific thickness are deemed unsuitable for evaluation using these test methods.
To classify the flammability of thin flexible test specimens, ISO 9773 offers an appropriate testing method, especially when multiple specimens shrink from the flame without igniting.
Effects of test specimen conditioning
The burning behavior of certain plastics can alter over time, making it essential to conduct tests before and after conditioning using a suitable method The recommended conditioning procedure involves 168 hours ± 2 hours at 70 °C ± 2 °C Alternative conditioning times and temperatures may be utilized if agreed upon by the involved parties, and any deviations should be documented in the test report.
Laboratory fume hood/chamber
The laboratory fume hood must have a minimum internal volume of 0.5 m³, allowing for observation of ongoing tests while ensuring a draught-free environment and normal thermal air circulation around the test specimen during combustion The chamber's interior surfaces should be dark, and when a light meter is placed at the rear, the light level should be below 20 lx For safety, the enclosure should be completely closable and equipped with an extraction device, such as an exhaust fan, to eliminate potentially toxic combustion products This extraction system should remain off during testing and activated immediately afterward to clear fire effluents, possibly requiring a positive closing damper.
NOTE Placing a mirror in the chamber to provide a rear view of the test specimen has been found to be useful.
Laboratory burner
The laboratory burner shall conform to IEC 60695-11-4.
Support stand
The support stand shall have clamps or the equivalent, adjustable for the positioning of the test specimen (see Figures 1 and 3).
Timing device
The timing device shall have a resolution of 0,5 s or less
NOTE Some laboratories have found it useful to utilize a sound activated timer as a means of counting the flame application time.
Measuring scale
The measuring scale shall be graduated in millimetres.
Wire gauze
The wire gauze shall be 20 mesh (approximately 20 openings per 25 mm), made from steel wire 0,40 mm to 0,45 mm in diameter and cut into approximately 125 mm squares.
Conditioning chamber
The conditioning chamber shall be maintained at 23 °C ± 2 °C and a relative humidity of
NOTE Standard atmospheres for the conditioning and testing of plastic materials are described in ISO 291:2008.
Micrometer
The micrometer must achieve a resolution of 0.01 mm or finer for test specimens with a thickness of 0.25 mm or greater, and a resolution of 0.001 mm or finer for test specimens with a thickness of less than 0.25 mm.
HB support fixture
The HB support fixture shall be used for testing specimens that are not self-supporting (see
Desiccator
The desiccator shall contain anhydrous calcium chloride or other drying agent, which can be maintained at 23 °C ± 2 °C and a relative humidity not exceeding 20 %.
Air-circulating oven
The air-circulating oven shall provide a conditioning temperature of 70 °C ± 2 °C, unless otherwise stated in the relevant specification, whilst providing not less than five air changes per hour.
Cotton pads
The pads shall be made of absorbent cotton designated “100 % cotton” or “pure cotton”
NOTE This is also referred to as “cotton wool”
Test specimen preparation
Test specimens shall be fabricated by the appropriate ISO method, e.g casting and injection moulding in accordance with ISO 294, compression moulding in accordance with ISO 293 or
ISO 295 outlines the process for transfer moulding to achieve the required shape If this method is not feasible, the test specimen must be created using the standard fabrication process typically employed for moulding product parts In cases where this is also not possible, specimens should be cut from a representative sample of the moulded material sourced from the final product.
NOTE If it is not possible to prepare test specimens by any of the methods outlined above, alternative fire test methods may be used (such as IEC 60695-11-5)
After any cutting operation, care shall be taken to remove all dust and any particles from the surface; cut edges shall be fine sanded to a smooth finish.
Test specimen dimensions
Bar test specimens must be 125 mm ± 5 mm in length and 13.0 mm ± 0.5 mm in width, with thicknesses that meet the minimum and maximum requirements for the flame classification being evaluated The recommended thickness values start at 0.1 mm.
0,2 mm, 0,4 mm, 0,75 mm, 1,5 mm, 3,0 mm, 6,0 mm, and/or 12,0 mm
NOTE 1 The gauges found in Figures 9 and 10 have been found useful for confirming proper specimen dimensions
The maximum allowable thickness is 13.0 mm, although alternative thicknesses can be utilized if agreed upon by the involved parties, which must be documented in the test report Additionally, edges must be smooth, and corner radii should not exceed 1.3 mm.
A minimum of 6 bar test specimens for Method A and 20 test specimens for Method B shall be prepared
Thickness measurements of the test specimen should be conducted at the center and both ends using a micrometer The thickness value is determined by calculating the arithmetic mean of the three measurements obtained.
For rigid specimens, thickness measurements shall be performed in accordance with
To comply with ISO 16012, utilize a ratchet micrometer and close it at a rate that allows for easy tracking of the scale or digital display Continue until the ratchet clicks three times, the friction thimble slips, or the contact surfaces are fully engaged with the test specimen, then record the indicated reading.
For flexible, non-rigid, or elastic test specimens, a dial gauge micrometer may be used The closing motion shall be stopped when the pressure foot just contacts the test specimen
NOTE 2 Other measuring devices equivalent to a micrometer may be used to measure thickness if found to be satisfactory
In order for test specimens to accurately represent a nominal thickness, each measurement and the overall average shall meet the tolerances given in Table 1
NOTE 3 For example, to represent a thickness of 1,5 mm, all tested specimens should measure between 1,35 mm and 1,65 mm.
Testing materials – ranges in formulations
General
The results of tests carried out on test specimens of different colour, thickness, density, molecular mass, anisotropic direction and type, or with different additives or fillers/reinforcements can vary.
Density, melt flows and filler/reinforcement
Test specimens exhibiting extreme variations in density, melt flows, and filler/reinforcement content may be deemed representative if they achieve consistent flame test classifications If discrepancies arise in flame test classifications among the specimens, the evaluation will focus solely on those with extreme characteristics Furthermore, specimens with intermediate properties must also be tested to accurately define the representative range for each flame classification.
Colour
Uncoloured bar test specimens and those with the highest levels of organic and inorganic pigment loading are deemed representative of the color range if they yield the same flame test classification It is essential to test specimens containing pigments known to influence flammability characteristics The specimens to be tested include: a) those without any coloring; b) those with the highest levels of organic pigments, colorants, dyes, or carbon black; c) those with the highest levels of inorganic pigments; and d) those containing pigments, colorants, or dyes that negatively impact flammability.
Otherwise, individual colours shall be evaluated and classified
8 Test method A – Horizontal burning test
Conditioning and test conditions
General
Unless otherwise required by the relevant specification, the requirements listed below shall apply
8.1.2 “As received” conditioned test specimens
Two sets of three bar test specimens shall be conditioned for a minimum of 48 h at
23 °C ± 2 °C and 50 % ± 10 % relative humidity (see ISO 291:2008, Clause 6, Table 2,
Class 2) Once removed from the conditioning chamber (see 6.7), the test specimens shall be tested within 30 min.
Test conditions
All test specimens shall be tested in a laboratory atmosphere of 15 °C to 35 °C and 75 % or less relative humidity.
Test procedure
Test specimen marking
Three test specimens will be evaluated, each marked with two lines perpendicular to the bar's longitudinal axis, positioned at 25 mm ± 1 mm and 100 mm ± 1 mm from the end that will be subjected to the test flame.
NOTE The gauge found in Figure 9 has been found useful for properly marking a set of 3 specimens at a time.
Test specimen setup
Clamp the test specimen at the end furthest from the 25 mm mark, with its longitudinal axis approximately horizontal and its transverse axis inclined at 45° ± 2°, as illustrated in Figure 1
Clamp the wire gauze horizontally 10 mm ± 1 mm below the lower edge of the test specimen, ensuring that the free end of the specimen is vertically aligned with the edge of the gauze, as illustrated in Figure 1 Prior to each test, any residual material on the wire gauze from previous tests must be burned off, or a new wire gauze should be utilized.
If the test specimen sags at its free end and is not able to maintain the distance of
To ensure proper testing, utilize the support fixture (refer to section 6.9) depicted in Figure 2, maintaining a distance of 10 mm ± 1 mm between the fixture and the test specimen Position the support fixture on the gauze so that it adequately supports the specimen, with the small extended portion of the fixture located approximately 10 mm from the specimen's free end Additionally, ensure sufficient clearance at the clamped end of the test specimen to allow for free lateral movement of the support fixture.
Flame setup
Position the burner tube vertically and ensure it is placed at a distance from the test specimen Adjust the burner to generate a standardized nominal test flame of 50 W, in accordance with IEC 60695-11-4 Confirm the flame under the following conditions: a) when the gas supply is altered, b) when any test apparatus or parameters are modified, or c) in the event of a dispute, with a minimum confirmation frequency of once per month Allow at least 5 minutes for the burner conditions to stabilize before proceeding.
Application of flame and use of the HB support fixture
To ensure accurate testing, maintain the burner tube's central axis at an angle of 45° ± 2° to the horizontal, directed towards the free end of the test specimen Apply the flame to the lower edge of the specimen's free end, ensuring that the burner tube's central axis aligns vertically with the longitudinal bottom edge of the specimen Position the burner to allow the flame to impact the free end of the test specimen over a length of approximately [insert length].
As the flame front advances along the test specimen, it is essential to withdraw the support fixture at a similar rate to prevent any contact between the flame front and the fixture, ensuring that neither the flame nor the burning of the test specimen is affected.
The test flame must be applied in a fixed position for 30 seconds, with a tolerance of ± 1 second, or it should be removed immediately once the flame front on the test specimen reaches the 25 mm mark, if this occurs in less than 30 seconds.
30 s Restart the timing device (see 6.4) when the flame front reaches the 25 mm mark
NOTE Withdrawing the burner a distance of 150 mm from the test specimen has been found to be satisfactory.
Method and observations
If the test specimen continues to burn after the removal of the test flame, record the elapsed time \( t \) in seconds, rounded to the nearest whole second, for the flame front to travel from the initial point.
If the flame front reaches the 25 mm mark but does not extend beyond the 100 mm mark, measure and record the elapsed time \( t \) in seconds, rounded to the nearest whole second, along with the damaged length \( L \) in millimeters, which is the distance from the 25 mm mark to the point where the flame front halts If the flame front surpasses the 100 mm mark, note the damaged length \( L \) as 75 mm.
Test two additional new test specimens The contents of the laboratory fume/chamber hood shall be evacuated after each test specimen
If one test specimen from the initial set of three fails to meet the criteria outlined in sections 8.4.1 and 8.4.2, a new set of three test specimens must be tested.
All test specimens from the second set shall conform to all the specified criteria for the relevant classification.
Calculation
Calculate the linear burning rate v, in units of millimetres per minute, for each test specimen where the flame front passes the 100 mm mark, using the following equation:
60 t v L where v is the linear burning rate (see 3.22);
L is the damaged length (see 8.2.5); and t is the time (see 8.2.5).
Classification
General
The materials shall be classified HB, HB40 or HB75 (HB = horizontal burning) in accordance with the criteria given below
NOTE The preferred classifications are HB or HB40 The HB75 rating will be removed from the next edition of this standard.
HB classification
A material classified as HB must meet specific criteria: it either does not sustain a flame after the ignition source is removed, or if it does continue to burn, the flame front must not exceed 100 mm If the flame front does surpass this 100 mm mark, additional considerations apply.
1) it does not have a linear burning rate exceeding 40 mm/min for a thickness of 3,0 mm to 13,0 mm or
2) a linear burning rate not exceeding 75 mm/min for a thickness of less than 3,0 mm;
If the linear burning rate does not exceed 40 mm/min for tests performed with specimens between 1,5 and 3,2 mm, the HB classification shall automatically be accepted down to a
HB40 classification
A material designated as HB40 must meet specific criteria: it should either not burn with a flame after the ignition source is removed, continue to burn with a flame without exceeding a flame front of 100 mm after the ignition source is removed, or if the flame front exceeds 100 mm, it must not have a linear burning rate greater than 40 mm/min.
HB75 classification
A material classified as HB75 must meet specific criteria: it should either not burn with a flame after the ignition source is removed, continue to burn with a flame without exceeding a 100 mm flame front after the ignition source is removed, or if the flame front exceeds 100 mm, it must not have a linear burning rate greater than 75 mm/min.
Test report
The test report must reference the relevant International Standard and include essential details for product identification, such as the manufacturer's name, product number or code, and color, along with the thickness of the test specimen.
– for test specimens 1,0 mm or greater, to the nearest 0,01 mm,
For test specimens measuring less than 1.0 mm, measurements should be taken to the nearest 0.001 mm It is essential to record the nominal apparent density for rigid cellular materials, the direction of any anisotropy in relation to the specimen's dimensions, and details of the conditioning treatment Additionally, any pre-testing treatments, excluding cutting, trimming, and conditioning, must be noted Observations should include whether the specimen continued to burn with a flame after the test flame was applied, and if the flame front passed the 25 mm and 100 mm marks For specimens where the flame front passed the 25 mm mark but not the 100 mm mark, the elapsed time \( t \) and the damaged length \( L \) should be documented Conversely, for specimens where the flame front reached or exceeded the 100 mm mark, the average linear burning rate \( v \) must be recorded It is also important to note whether a flexible test specimen support fixture was utilized, along with the assigned classification and relevant thickness.
9 Test method B – Vertical burning test
Conditioning and test conditions
General
Unless otherwise required by the relevant specification, the requirements listed below shall apply
9.1.2 “As received” conditioned test specimens
Two sets of five bar test specimens shall be conditioned for a minimum of 48 h at 23 °C ± 2 °C and
50 % ± 10 % relative humidity (ISO 291:2008, Table 2, Class 2) Once removed from the conditioning chamber (see 6.7), the test specimens shall be tested within 30 min.
Oven conditioned test specimens
Two sets of five bar test specimens should be conditioned in an air-circulating oven at 70 °C for 168 hours, with a tolerance of ± 2 hours, followed by a cooling period in a desiccator for a minimum of 4 hours Alternatively, industrial laminates can be conditioned for 24 hours.
125 °C ± 2 °C Once removed from the desiccator chamber, the test specimens shall be tested within 30 min.
Conditioning of the cotton pads
The cotton pads shall be conditioned in a desiccator for at least 24 h prior to use Once removed from the desiccator, the cotton pad shall be used within 30 min.
Test conditions
All test specimens shall be tested in a laboratory atmosphere of 15 °C to 35 °C and 40 % to
Test procedure
Test specimen setup
Clamp the test specimen using the upper 6 mm of its length with the longitudinal axis vertical
The lower end of the test specimen shall be 300 mm ± 10 mm above the horizontal cotton pad
(see 6.12) The cotton pad shall be approximately 50 mm × 50 mm × 6 mm uncompressed thickness and shall have a maximum mass of 0,08 g (see Figure 3).
Flame setup
Position the burner tube vertically and ensure it is placed away from the test specimen Adjust the burner to generate a standardized nominal test flame of 50 W, in accordance with IEC 60695-11-4 The flame must be verified under the following conditions: a) when the gas supply is altered, b) when any test apparatus or parameters are modified, or c) in the event of a dispute, with a minimum verification frequency of once per month.
Wait for a minimum of 5 min to allow the burner conditions to reach equilibrium.
Flame application and observations
To conduct the test, keep the burner tube's central axis vertical and horizontally position the test specimen towards its wide face Direct the flame to the center of the bottom edge of the specimen, ensuring that the top of the burner is aligned properly.
Position the burner 10 mm ± 1 mm below the test specimen and maintain this distance for 10 s ± 0.5 s, starting when the flame is fully aligned under the specimen Adjust the burner vertically to accommodate any changes in the length or position of the test specimen during this time.
NOTE 1 For test specimens which move under the influence of the burner flame, the use of a clearance gauge attached to the burner (see Figure 5), as described in IEC 60695-11-4, has been found to be satisfactory in maintaining the 10 mm distance between the top of the burner and the major portion of the test specimen
When conducting the flame application test, if the specimen generates molten drips, adjust the burner to a tilt of up to 45° perpendicular to the specimen's wide side, as illustrated in Figures 6 and 8.
Withdraw the burner just enough to avoid any material falling into its barrel, while ensuring a spacing of 10 mm ± 1 mm between the burner outlet and the main part of the test specimen, disregarding any molten material strings After applying the flame to the test specimen, record the results.
After a duration of 10 seconds ± 0.5 seconds, withdraw the burner to prevent any impact on the test specimen At the same time, start the timing device to measure the afterflame time \( t_1 \) in seconds Record \( t_1 \) along with observations regarding any particles or molten drips, noting if they ignited the layer of cotton.
NOTE 2 Withdrawing the burner a distance of 150 mm from the test specimen while measuring t 1 has been found to be satisfactory
Once the flaming of the test specimen stops, promptly reposition the test flame beneath it, ensuring the burner tube's central axis remains vertical and the burner top is 10 mm ± 1 mm below the specimen's lower edge for 10 s ± 0.5 s If needed, adjust the burner to avoid molten drips After this second flame application, extinguish the burner or move it away to prevent affecting the specimen, and simultaneously start timing the afterflame time \( t_2 \) and afterglow time \( t_3 \) to the nearest second Record \( t_2 \), \( t_3 \), and their sum \( t_2 + t_3 \) Additionally, document whether any particles or molten drips fall from the specimen and if they ignite the cotton pad, as well as whether the specimens burned to the holding clamp.
NOTE 3 Measuring and recording the afterflame time t 2 and then continuing the measurement of the sum of the afterflame time t 2 and the afterglow time t 3 (without resetting the timing device) has been found to be satisfactory in the recording of t 3
NOTE 4 Withdrawing the burner to a distance of 150 mm from the test specimen while measuring t 2 and t 3 has been found to be satisfactory
Conduct the testing procedure repeatedly until five specimens conditioned per section 9.1.2 and five specimens conditioned per section 9.1.3 have been evaluated Ensure that the laboratory fume hood or chamber is thoroughly evacuated after each test.
Evaluation of “burned to the holding clamp”
The condition known as "burned to the holding clamp" is assessed by first allowing the sample to cool After cooling, a soft, dry cloth should be used to remove soot and residue, followed by an examination of the sample 2 mm below the clamp line for any signs of combustion or pyrolysis Any thermal damage, such as melting or distortion below the clamp, is disregarded If the damage observed is due to the visible test flame during application, it does not qualify as being burned to the holding clamp A material is deemed burned to the holding clamp if the damage results from the burning flame front on the test specimen, or if the test specimen is completely consumed.
Criteria for retest
If one out of five test specimens fails to meet the classification criteria after a conditioning treatment, a new set of five specimens must be tested under the same conditions Additionally, if the total afterflame time (\$t_f\$) falls between 51 to 55 seconds for V-0 or 251 to 255 seconds for other classifications, another set of five test specimens is required for testing.
V-1 and V-2 (See 9.4) All test specimens from the second set shall conform to all the specified criteria for the classification.
Calculation of the total afterflame time, t f
For each set of five test specimens from the two conditioning treatments, calculate the total afterflame time for the set t f, in seconds, using the following equation:
The total afterflame time (\$t_f\$) is measured in seconds and is calculated by considering the first afterflame time (\$t_{1,i}\$) and the second afterflame time (\$t_{2,i}\$) for each test specimen (\$i\$).
Classification
Materials are classified as V-0, V-1, or V-2 based on vertical burning criteria outlined in Table 2 If the test results do not meet these specified criteria, the material cannot be classified using this method.
Table 2 – Criteria for vertical burning classification
Individual test specimen afterflame times (t 1 , t 2 ) 10 s 30 s 30 s
Total afterflame time t f for any conditioned set of five specimens 50 s 250 s 250 s
Individual test specimen afterflame time plus afterglow time after the second flame application (t 2 t 3 )
Afterflame and/or afterglow of any specimen burned to the holding clamp No No No
Cotton indicator pad ignited by flaming particles or drops No No Yes
For polyamide (type 66) materials classified as V-2, the relative viscosity of a supplied solution must be below 225 ml/g when measured with the 96% sulphuric acid method, or below 210 ml/g using the 90% formic acid method, in accordance with ISO 307 If the relative viscosity exceeds these thresholds, the viscosity of a solution from the moulded test specimen must be at least 70% of the viscosity of the supplied material.
Test report
The test report must reference the relevant International Standard and include essential details for product identification, such as the product number or code, color, and manufacturer's name, along with the thickness of the test specimen.
– for test specimens 1,0 mm or greater, to the nearest 0,01 mm,
For test specimens measuring less than 1.0 mm, measurements should be taken to the nearest 0.001 mm It is essential to record the nominal apparent density for rigid cellular materials, the direction of any anisotropy in relation to the dimensions of each specimen, and details of the conditioning treatment applied Additionally, any pre-testing treatments, excluding cutting, trimming, and conditioning, must be noted Individual values of t1, t2, t3, and the sum of t2 plus t3 should be documented for each specimen, along with the total afterflame time (tf) for each set of five specimens subjected to the two conditioning treatments Observations regarding whether any particles or molten drips fell from the specimens and ignited the cotton, as well as whether any specimens burned to the holding clamp, should also be included Finally, the assigned classification must be noted in conjunction with the relevant thickness.
Figure 1 – Horizontal burning test apparatus
Figure 2 – Flexible test specimen support fixture – method A
Figure 3 – Vertical burning test apparatus – method B
Figure 8 – Flame application when there are molten drips
3 specimens fit across inside width 40 Shaded areas recessed 1,3 mm
Figure 9 – HB Specimen Gauge (Example)
Tab to rest on burner Approx 1 mm
1 Specimen – the amount of specimen that last is not relevant, only the burning front matters
3 Examination line (2mm below the clamp line) of combustion or pyrolysis
5 Tip of the burning flame
Figure 11 – Flame front position not classified as “burned to the holding clamp”
1 Specimen – the amount of specimen that last is not relevant, only the burning front matters
3 Examination line (2mm below the clamp line) of combustion or pyrolysis
5 Tip of the burning flame
Figure 12 – Flame front position classified as “burned to the holding clamp”
In 1988, an interlaboratory experiment involving ten laboratories assessed precision data across three materials, with each material tested in three replicates using the average of three data points All tests were performed on 3.0 mm thick specimens, and the results were analyzed following ISO 5725-2 standards, as summarized in Table A.1.
All values are in millimetres per minute
NOTE Material symbols are defined in ISO 1043-1 [6]
Table A.1 provides a useful framework for understanding the approximate precision of this test method across a limited range of materials However, these data should not be strictly used as criteria for material acceptance or rejection, as they are specific to the interlaboratory test and may not accurately reflect other lots, conditions, thicknesses, materials, or laboratories.
In 1978, an interlaboratory experiment was conducted involving four laboratories, four materials, and two replicates, with precision data determined from the average of five data points The results, analyzed according to ISO 5725-2, are summarized in Table B.1 The nominal test specimens used in the interlaboratory trials were 3.0 mm thick.
Table B.1 – Afterflame time and afterflame plus afterglow times
Stage Time measured Parameter Material
PC PPE + PS ABS PF
After first flame application Afterflame time t 1 Average
0,8 0,3 0,6 After second flame application Afterflame time plus afterglow t 2 + t 3 Average
NOTE Symbols for plastics material are defined in ISO 1043-1
Table B.1 provides a useful framework for understanding the approximate precision of this test method across a limited range of materials However, these data should not be strictly used as criteria for accepting or rejecting materials, as they are specific to the interlaboratory test and may not accurately reflect other lots, conditions, thicknesses, materials, or laboratories.
[1] IEC 60695-1-10:2009, Fire hazard testing – Part 1-10: Guidance for assessing the fire hazard of electrotechnical products – General guidelines
[2] IEC 60695-1-11:2010, Fire hazard testing – Part 1-11: Guidance for assessing the fire hazard of electrotechnical products – Fire hazard assessment
[3] IEC 60695-11-5:2004, Fire hazard testing – Part 11-5: Test methods – Needle-flame test method – Apparatus, confirmatory test arrangement and guidance
[4] IEC 60695-1-30:2008, Fire hazard testing – Part 1-30: Guidance for assessing the fire hazard of electrotechnical products – Preselection testing process – General guidelines
[5] IEC 60695-11-20, Fire hazard testing – Part 11-20: Test flames – 500 W flame test methods
[6] ISO 1043-1, Plastics – Symbols and abbreviated terms – Part 1: Basic polymers and their special characteristics
[7] ISO 5725-2, Accuracy (trueness and precision) of measurement methods and results –
Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method
[8] ISO 9772, Cellular plastics – Determination of horizontal burning characteristics of small specimens subjected to a small flame
[9] ISO 845, Cellular plastics and rubbers – Determination of apparent (bulk) density
5 Signification des essais au feu 49
5.1 Essai avec éprouvettes en position verticale ou horizontale 49
5.2 Limitations d’utilisation des résultats d’essai 49
5.3 Propriétés physiques susceptibles d’affecter le comportement en combustion 49
5.5 Effets du conditionnement des éprouvettes d’essai 50
7.3 Essai des matériaux – gammes de formulations 52
7.3.2 Masse volumique, fusions et charge/renfort 53
8 Méthode d’essai A –Essai de combustion horizontale 53
8.1.2 Eprouvettes conditionnées ‘’en l’état de réception’’ 53
8.2.4 Application de la flamme et utilisation du système de support HB 54
9 Méthode d’essai B – Essai de combustion verticale 57
9.1.2 Eprouvettes conditionnées “en l’état de réception’’ 57
9.1.4 Conditionnement des coussins de coton 57
9.2.3 Application de la flamme et observations 58
9.2.4 Evaluation de l’état ‘’consumé jusqu’à la pince de fixation’’ 58
9.2.5 Critères de répétition d’un essai 59
9.3 Calcul de la durée totale de flamme résiduelle, tf 59
Annexe A (informative) Fidélité de la méthode d’essai A 72
Annexe B (informative) Fidélité de la méthode d’essai B 73
Figure 1 – Appareillage pour l'essai de combustion horizontale 61
Figure 2 – Système de support pour éprouvette flexible – méthode A 62
Figure 3 – Appareillage pour l'essai de combustion verticale – méthode B 63
Figure 5 – Fixation optionnelle d'un calibre d'écartement 65
Figure 7 – Application de la flamme 67
Figure 8 – Application de la flamme lorsque des gouttes en fusion sont présentes 68
Figure 9 – Calibre de l’éprouvette pour combustion horizontale – HB (Exemple) 68
Figure 10 – Calibre de l’éprouvette pour combustion verticale – V (Exemple) 69
Figure 11 – Position du front de flamme non classộe ôconsumộe jusqu’à la pince de fixationằ 70
Figure 12 – Position du front de flamme classộe ôconsumộe jusqu’à la pince de fixationằ 71
Tableau 2 – Critères de classification selon la combustion verticale 59
Tableau A.1 – Vitesse linéaire de combustion 72
Tableau B.1 – Durée de flamme résiduelle et durée de flamme résiduelle plus durée d'incandescence résiduelle 73
ESSAIS RELATIFS AUX RISQUES DU FEU –
Partie 11-10: Flammes d'essai – Méthodes d'essai horizontal et vertical à la flamme de 50 W
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La Norme internationale CEI 60695-11-10 a été établie par le comité d'études 89 de la CEI:
Essais relatifs aux risques du feu
Le texte de cette norme est issu des documents suivants:
Le rapport de vote indiqué dans le tableau ci-dessus donne toute information sur le vote ayant abouti à l'approbation de cette norme
Cette publication a été rédigée selon les Directives ISO/CEI, Partie 2
Cette deuxième édition annule et remplace la version consolidée de la CEI 60695-11-10 publiée en 2008 Elle en constitue une révision technique
Les principales modifications apportées par rapport à la première édition sont énumérées ci- dessous:
– Des modifications rédactionnelles ont été faites dans l’ensemble du document en vue d’aligner la CEI 60695-11-10 sur la CEI 00695-11-20
– Des détails sur les dimensions des éprouvettes d’essai ont été ajoutés dans l’Article 7
– Un nouveau Paragraphe 9.1.4 Conditionnement du coussin de coton a été ajouté
– Un nouveau Paragraphe 9.2.4 Evaluation de l’état ‘’consumé jusqu’à la pince de fixation a été ajouté.
– Une nouvelle Annexe C avec des exemples de fiches techniques a été ajoutée
– La Bibliographie a été actualisée et des références ajoutées.
Cette norme a le statut d’une publication fondamentale de sécurité conformément au
Guide CEI 104 et au Guide ISO/CEI 51
La présente norme internationale doit être utilisée conjointement avec la CEI 60695-11-4.
A comprehensive list of all parts of the IEC 60695 series, categorized under the general title Fire Risk Testing, is available on the IEC website.
La Partie 11 comprend les parties suivantes:
Partie 11-2: Flammes d’essai – Flamme à pré mélange de 1 kW nominal – Appareillage, disposition d’essai de vérification et indications
Partie 11-3: Flammes d’essai – Flammes de 500 W – Appareillage et méthodes d’essai de vérification
Partie 11-4: Flammes d’essai – Flamme de 50 W – Appareillage et méthodes d’essai de vérification
Partie 11-5: Flammes d’essai – Méthode d’essai au brûleur-aiguille – Appareillage, dispositif d’essai de vérification et lignes directrices
Partie 11-10: Flammes d’essai – Méthodes d’essai horizontale et verticale à la flamme de
Partie 11-11: Flammes d’essai – Détermination du flux de chaleur caractéristique pour l’allumage à partir d’une flamme source sans contact
Partie 11-20: Flammes d’essai – Méthodes d’essai à la flamme de 500 W
Partie 11-30: Flammes d’essai – Historique et développement de 1979 à 1999
Partie 11-40: Flammes d’essai – Essais de confirmation – Guide
The committee has determined that the content of this publication will remain unchanged until the stability date specified on the IEC website at "http://webstore.iec.ch" in relation to the sought publication On that date, the publication will be updated.
• remplacée par une édition révisée, ou