SIST EN ISO 1182:2002
(Main)Reaction to fire tests for building products - Non-combustibility test (ISO 1182:2002)
Reaction to fire tests for building products - Non-combustibility test (ISO 1182:2002)
This European Standard specifies a method of test for determining the non-combustibility performance, under specified conditions, of homogeneous building products and substantial components of non-homogeneous building products.
Information on the precision of the test method is given in annex A.
Prüfungen zum Brandverhalten von Bauprodukten - Nichtbrennbarkeitsprüfung (ISO 1182:2002)
Diese Europäische Norm legt ein Prüfverfahren zur Bestimmung des Brandverhaltens zur Nichtbrennbarkeit von homogenen Bauprodukten und substantiellen Bestandteilen von nichthomogenen Bauprodukten unter festgelegten Bedingungen fest.
Informationen zur Genauigkeit des Prüfverfahrens sind Anhang A zu entnehmen.
Essais de réaction au feu des produits de construction - Essai d'incombustibilité (ISO 1182:2002)
La présente Norme européenne prescrit une méthode d'essai permettant de déterminer, dans des conditions spécifiées, les performances d'incombustibilité des produits de construction homogenes et des composants substantiels des produits de construction hétérogenes.
L'annexe A fournit des informations sur la fidélité de la méthode d'essai.
Preskusi odziva gradbenih proizvodov na ogenj - Preskus negorljivosti (ISO 1182:2002)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 1182:2002
01-september-2002
Preskusi odziva gradbenih proizvodov na ogenj - Preskus negorljivosti (ISO
1182:2002)
Reaction to fire tests for building products - Non-combustibility test (ISO 1182:2002)
Prüfungen zum Brandverhalten von Bauprodukten - Nichtbrennbarkeitsprüfung (ISO
1182:2002)
Essais de réaction au feu des produits de construction - Essai d'incombustibilité (ISO
1182:2002)
Ta slovenski standard je istoveten z: EN ISO 1182:2002
ICS:
13.220.50 Požarna odpornost Fire-resistance of building
gradbenih materialov in materials and elements
elementov
SIST EN ISO 1182:2002 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 1182:2002
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SIST EN ISO 1182:2002
EUROPEAN STANDARD
EN ISO 1182
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2002
ICS 13.220.50
English version
Reaction to fire tests for building products - Non-combustibility
test (ISO 1182:2002)
Essais de réaction au feu des produits de construction - Prüfungen zum Brandverhalten von Bauprodukten -
Essai d'incombustibilité (ISO 1182:2002) Nichtbrennbarkeitsprüfung (ISO 1182:2002)
This European Standard was approved by CEN on 3 May 2001.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2002 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 1182:2002 E
worldwide for CEN national Members.
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SIST EN ISO 1182:2002
EN 1182:2002 (E)
Contents
page
Foreword .3
Introduction .4
1 Scope.5
2 Normative references.5
3 Terms and definitions.5
4 Test apparatus.6
5 Test specimen .12
6 Conditioning .13
7 Test procedure .13
8 Expression of results.22
9 Test report.22
Annex A (informative) Precision of test method .24
Annex B (informative) Typical designs of test apparatus .27
Annex C (normative) Thermocouples for additional measurements .30
(informative)
Annex D Temperature recording .32
2
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SIST EN ISO 1182:2002
EN 1182:2002 (E)
Foreword
The text of EN ISO 1182:2002 has been prepared by Technical Committee CEN/TC 127 “Fire safety
in buildings”, the secretariat of which is held by BSI in collaboration with Technical Committee ISO/TC
92 “Fire safety”.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by August 2002, and conflicting national standards shall
be withdrawn at the latest by December 2003.
Annexes A, B and D are informative. Annex C is normative.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, the Czech
Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta,
Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.
3
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SIST EN ISO 1182:2002
EN 1182:2002 (E)
Introduction
This fire test has been developed for use by those responsible for selection of construction products
which, whilst not completely inert, produce only a very limited amount of heat and flame when
exposed to temperatures of approximately 750 °C.
The limitation of the field of application to testing homogeneous products and substantial components
of non-homogeneous products was introduced because of problems in defining specifications for the
specimens. The design of the specimen of non-homogeneous products strongly influences the test
results, which is the reason why non-homogenous products cannot be tested to this standard.
Safety warning
The attention of all persons concerned with managing and carrying out this test is drawn to the fact
that fire testing may be hazardous and that there is a possibility that toxic and/or harmful smoke and
gases may be evolved during the test. Operational hazards may also arise during the testing of
specimens and the disposal of test residues.
An assessment of all potential hazards and risks to health should be made and safety precautions
should be identified and provided. Written safety instructions should be issued. Appropriate training
should be given to relevant personnel. Laboratory personnel should ensure that they follow written
safety instructions at all times.
4
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SIST EN ISO 1182:2002
EN 1182:2002 (E)
1 Scope
This European Standard specifies a method of test for determining the non-combustibility
performance, under specified conditions, of homogeneous building products and substantial
components of non-homogeneous building products.
Information on the precision of the test method is given in annex A.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at appropriate places in the text, and the
publications are listed hereafter. For dated references subsequent amendments to or revisions of, any
of these publications apply to this European Standard only when incorporated in it by amendment or
revision. For undated references the latest edition of the publication referred to applies (including
amendments).
EN 13238, Reaction to fire tests for building products — Conditioning procedures and general rules
for selection of substrates.
EN ISO 13943, Fire safety — Vocabulary (ISO 13943:1999).
EN 60584-2, Thermocouples — Part 2: Tolerances (IEC 60584-2:1982+A1:1989).
3 Terms and definitions
For the purpose of this European Standard, the terms and definitions given in EN ISO 13943, together
with the following, apply:
3.1
product
material, element or component about which information is required
3.2
material
a single basic substance or uniformly dispersed mixture of substances e.g. metal, stone, timber,
concrete, mineral wool with uniformly dispersed binder, polymers
3.3
loose fill material
material without any physical shape
3.4
homogeneous product
a product, consisting of a single material, having uniform density and composition throughout the
product
3.5
non-homogeneous product
a product that does not satisfy the requirements of a homogeneous product. It is a product composed
of more than one component, substantial and/or non-substantial
5
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SIST EN ISO 1182:2002
EN 1182:2002 (E)
3.6
substantial component
a material that constitutes a significant part of a non-homogeneous product. A layer with a mass/unit
2
or a thickness 1,0 mm is considered to be a substantial component
area 1,0 kg/m
4 Test apparatus
4.1 General
4.1.1 The test apparatus shall be capable of creating the conditions specified in 7.1. A typical
design of furnace is given in annex B; other designs of furnace may be used.
4.1.2 All dimensions given in the description of the test apparatus are nominal values, unless
tolerances are specified.
4.1.3 The apparatus shall consist of a furnace comprising essentially a refractory tube surrounded
by a heating coil and enclosed in an insulated surround. A cone-shaped airflow stabilizer shall be
attached to the base of the furnace and a draught shield to its top.
4.1.4 The furnace shall be mounted on a stand and shall be equipped with a specimen holder and a
device for inserting the specimen-holder into the furnace tube.
4.1.5 Thermocouples, as specified in 4.4, shall be provided for measuring the furnace temperature
and the furnace wall temperature. annex C gives details of additional thermocouples to be used if the
specimen surface temperature and the specimen centre temperature are required. The thermal
sensor, as specified in 4.5, shall be provided for measuring the furnace temperature along its central
axis.
4.2 Furnace, stand and draught shield
4.2.1 The furnace tube shall be made of an alumina refractory material as specified in Table 1, of
3
density (2 800 ± 300) kg/m and shall be (150 ± 1) mm high with an internal diameter of (75 ± 1) mm
and a wall thickness of (10 ± 1) mm.
Table 1 — Composition of the furnace tube refractory material
Material Composition
% (kg/kg mass)
Alumina (Al O ) > 89
2 3
Silica and alumina (SiO , Al O )> 98
2 2 3
Ferric oxide (Fe O) < 0,45
2
Titanium dioxide (TiO ) < 0,25
2
Manganese oxide (Mn O )< 0,1
3 4
Other trace oxides (sodium, potassium, calcium and magnesium oxides) The balance
4.2.2 The furnace tube shall be fitted in the centre of a surround made of insulating material
150 mm in height and of 10 mm wall thickness, and fitted with top and bottom plates recessed
internally to locate the ends of the furnace tube. The annular space between the tubes shall be filled
with a suitable insulating material. A typical example is given in annex B.
6
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SIST EN ISO 1182:2002
EN 1182:2002 (E)
4.2.3 To the underside of the furnace shall be attached an open-ended cone-shaped air flow
stabilizer 500 mm in length, and reducing uniformly from (75 ± 1) mm internal diameter at the top to
(10 ± 0,5) mm internal diameter at the bottom. The stabilizer shall be manufactured from 1 mm thick
sheet steel, with a smooth finish on the inside. The joint between the stabilizer and the furnace shall
be a close, airtight fit, with a smooth finish internally. The upper half of the stabilizer shall be insulated
externally with a suitable insulating material. A typical example is given in annex B.
4.2.4 A draught shield made of the same material as the stabilizer cone shall be provided at the top
of the furnace. It shall be 50 mm high and have an internal diameter of (75 ± 1) mm. The draught
shield and its joint with the top of the furnace shall have a smooth finish internally, and the exterior
shall be insulated with a suitable insulating material. A typical example is given in annex B.
4.2.5 The assembly of the furnace, stabilizer cone and draught shield shall be mounted on a firm
horizontal stand which shall be provided with a base and draught screen attached to the stand to
reduce draughts around the bottom of the stabilizer cone. The draught screen shall be 550 mm high
and the bottom of the stabilizer cone shall be 250 mm above the base plate.
4.3 Specimen holder and insertion device
4.3.1 The specimen holder shall be as specified in Figure 1, and shall be made of nickel/chromium
or heat-resisting steel wire. A fine metal gauze tray of heat-resisting steel shall be placed in the
bottom of the holder. The mass of the holder shall be (15 ± 2) g.
4.3.2 The specimen holder shall be capable of being suspended from the lower end of a tube of
stainless steel having an outside diameter of 6 mm and a bore of 4 mm.
4.3.3 The specimen holder shall be provided with a suitable insertion device for lowering it precisely
down the axis of the furnace tube without shock, so that the geometric centre of the specimen is
located rigidly at the geometric centre of the furnace during the test. The insertion device shall consist
of a metallic sliding rod moving freely within a vertical guide fitted to the side of the furnace.
7
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SIST EN ISO 1182:2002
EN 1182:2002 (E)
Dimensions in millimetres
o.d. 51
o.d. 6
i.d. 4
1
T
S
30º
i.d. 46
3 x 1,5
T
1,5 T
C
S
AA
T
C
o.d. 48
2
A - A
Key
1 Stainless steel tube T Specimen centre thermocouple
c
2 Aperture mesh 0,9 mm diameter of wire 0,4 mm T Specimen surface thermocouple
s
Note - use of T and T is optional
c s
Figure 1 — Specimen holder
8
57
50
3
25
1,5
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SIST EN ISO 1182:2002
EN 1182:2002 (E)
4.3.4 The specimen holder for loose fill materials shall be cylindrical and of the same outer
dimensions as the specimen (see 5.1) and made of a fine metal wire gauze of heat resisting steel
similar to the wire gauze used at the bottom of the normal holder specified in 4.3.1. The specimen
holder shall have an open end at the top. The mass of the holder shall not exceed 30 g.
4.4 Thermocouples
4.4.1 Thermocouples with a wire diameter of 0,3 mm and an outer diameter of 1,5 mm shall be
used. The hot junction shall be insulated and not earthed. The thermocouples shall be of either type K
or type N. They shall be of tolerance class 1 in accordance with EN 60584-2. The sheathing material
shall be either stainless steel or a nickel based alloy.
4.4.2 All new thermocouples shall be artificially aged before use to reduce reflectivity.
4.4.3 The furnace thermocouple shall be located with its hot junction (10 ± 0,5) mm from the tube
wall and at a height corresponding to the geometric centre of the furnace tube (see Figure 2). The
position of the thermocouple may be set using the locating guide illustrated in Figure 3, and the
correct position shall be maintained with the help of a guide attached to the draught shield.
Details of any additional thermocouples required and their positioning are given in annex C.
4.4.4
4.5 Thermal sensor
The thermal sensor shall be made of a thermocouple of the type specified in 4.4.1 and 4.4.2, brazed
to a copper cylinder of diameter (10 ± 0,2) mm and height (15 ± 0,2) mm.
4.6 Mirror
To facilitate observation of sustained flaming and for the safety of the operators, it is advisable to
provide a mirror above the apparatus, positioned so that it will not affect the test.
A mirror 300 mm square, at an angle of 30° to the horizontal, 1 m above the furnace has been found
suitable.
4.7 Balance
A balance with an accuracy of 0,01 g is required.
4.8 Voltage stabilizer
This shall be a single-phase automatic voltage stabilizer with a rating of not less than 1,5 kVA.
It shall be capable of maintaining the accuracy of the output voltage within ± 1 % of the rated value
from zero to full load.
4.9 Variable transformer
This shall be capable of handling at least 1,5 kVA and of regulating the voltage output from zero to a
maximum value equal to that of the input voltage. The voltage output shall vary linearly over the
range.
4.10 Electrical input monitor
An ammeter, and voltmeter or wattmeter, shall be provided to enable rapid setting of the furnace to
approximately the operating temperature. Any of these instruments shall be capable of measuring the
levels of electrical power specified in 7.2.3.
9
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SIST EN ISO 1182:2002
EN 1182:2002 (E)
Dimensions in millimetres
3
4
T
F
T
S
T
C
1,5
2
1
1
+
10 0,5
-
5
0
45
-2 15
+
75 1
-
2
Key
1 Furnace wall T Furnace thermocouple
F
2 Mid-height of constant temperature zone T Specimen centre thermocouple
C
3 Sheathed thermocouples T Specimen surface thermocouple
S
4 2 mm diameter hole
5 Contact between thermocouple and material NOTE Use of T and T is optional.
C S
Figure 2 — Relative position of furnace, specimen and thermocouple
10
+
50 2
-
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SIST EN ISO 1182:2002
EN 1182:2002 (E)
Dimensions in millimetres
1
22
2
20
40
A
A
2
Key
1 Wooden handle
2Weld
Figure 3 — A typical locating guide
11
R 37,5
R 26,75
200
1,0
= =
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SIST EN ISO 1182:2002
EN 1182:2002 (E)
4.11 Power controller
This can be used as an alternative to the voltage stabilizer, variable transformer and electrical input
monitor specified in 4.8, 4.9 and 4.10. It shall be of the type which incorporates phase-angle firing
and shall be linked to a thyristor unit capable of supplying 1,5 kVA. The maximum voltage shall not be
greater than 100 V and the current limit shall be adjusted to give "100 % power" equivalent to the
maximum rating of the heater coil. The stability of the power controller shall be approximately 1,0 %
and the setpoint repeatability shall be ± 1,0 %. The power output shall be linear over the setpoint
range.
4.12 Temperature indicator and recorder
The temperature indicator shall be capable of measuring the output from the thermocouple to the
nearest 1 °C or the millivolt equivalent. It shall be capable of producing a permanent record of this at
intervals of not greater than 1 s.
NOTE A suitable instrument is either a digital device or a multirange chart recorder with an operating range
of 10 mV full scale deflection with a "zero" of approximately 700 °C.
4.13 Timing device
The timing device shall be capable of recording elapsed time to the nearest second and shall be
accurate to within 1 s in 1 h.
4.14 Desiccator
This is used for storing the conditioned specimens (see clause 6).
5 Test specimen
5.1 General
The test specimen shall be taken from a sample which is sufficiently large to be representative of the
product.
3
The test specimens shall be cylindrical and each shall have a volume of (76 ± 8) cm , a diameter of
0
( 45 ) mm and a height of (50 ± 3) mm.
2
5.2 Preparation
5.2.1 If the thickness of the material is different from (50 ± 3) mm, specimens of the height of
(50 ± 3) mm shall be made by using a sufficient number of layers of the material and/or by adjustment
of the material thickness.
5.2.2 The layers shall occupy a horizontal position in the specimen holder and shall be held
together firmly, without significant compression, by means of two fine steel wires, of maximum
diameter 0,5 mm, to prevent air gaps between layers. The specimens of loose fill materials shall be
representative in appearance, density etc. as in use.
NOTE When a specimen is composed of a number of layers, the overall density should be as close as possible
to that of the product provided by the manufacturer.
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SIST EN ISO 1182:2002
EN 1182:2002 (E)
5.3 Number
Five specimens shall be tested following the procedure given in 7.4.
NOTE More specimens may be tested as required for any classification system.
6 Conditioning
The test specimens shall be conditioned as specified in EN 13238. Afterwards, they shall be dried in a
ventilated oven maintained at (60 ± 5) °C, for between 20 h and 24 h, and cooled to ambient
temperature in a desiccator prior to testing. The mass of each specimen shall be determined to an
accuracy of 0,01 g prior to test.
7 Test procedure
7.1 Test environment
The apparatus shall not be exposed to draughts or any form of strong direct sunlight or artificial
illumination which would adversely affect the observation of flaming inside the furnace.
The room temperature shall not change by more than 5 °C during a test.
7.2 Setting up procedure
7.2.1 Specimen holder
Remove the specimen holder (see 4.3) and its support from the furnace.
7.2.2 Thermocouple
The furnace thermocouple shall be positioned as specified in 4.4.3, and if additional thermocouples
are required they shall be positioned as specified in 4.4.4 and annex C. All thermocouples shall be
connected to the temperature indicator (see 4.12), using compensating cables.
7.2.3 Electricity supply
Connect the heating element of the furnace either to the voltage stabilizer (see 4.8), variable
transformer (see 4.9) and the electrical input monitor (see 4.10) or the power controller (see 4.11) as
shown in Figure 4. Automatic thermostatic control of the furnace shall not be used during testing.
NOTE 1 The heating element should normally draw a current of between 9 A and 10 A at approximately 100 V
under steady state conditions. In order not to overload the winding, it is recommended that the maximum current
does not exceed 11 A.
NOTE 2 A new furnace tube should be subjected to slow heating initially. A suitable procedure has been
found to be to increase the furnace temperature in steps of approximately 200 °C, allowing 2 h heating at each
temperature.
7.2.4 Furnace stabilization
Adjust the power input to the furnace so that the average furnace temperature, as indicated by the
furnace thermocouple (see 4.4), is stabilized for at least 10 minutes at (750 ± 5) °C. The drift (linear
regression) shall be not more than 2 °C during these 10 minutes and there shall be a maximum
deviation from the average temperature of not more than 10 °C in 10 minutes (see annex D).
Take a continuous record of the temperature.
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SIST EN ISO 1182:2002
EN 1182:2002 (E)
1
4
A
3
2
5
9
6
7
8
Key
1 Ammeter 6 Furnace winding
2 Voltage stabilizer 7 Compensating cable
3 Variable transformer 8 Temperature indicator
4 Thermocouples 9 Power controller
5 Terminal blocks
Figure 4 — Layout of apparatus and additional equipment
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SIST EN ISO 1182:2002
EN 1182:2002 (E)
7.3 Calibration procedure
7.3.1 Furnace wall temperature
7.3.1.1 When the furnace temperature is stabilized as given in 7.2.4, measure the temperature of
the furnace wall using a contact thermocouple of the type specified in 4.5 and the temperature
indicator specified in 4.12. Make measurements on three vertical axes of the furnace wall such that
the distances separating each of the axes are the same. Record the temperatures on each axis at a
position corresponding to the mid-height point of the furnace tube and at positions both 30 mm above
and 30 mm below the mid-height point.
This procedure may be conveniently achieved using a suitable thermocouple scanning device with the
thermocouple and insulating tubes in the positions specified above. Particular attention should be paid
to the contact between thermocouple and furnace wall which, if poor, will lead to low temperature
readings. At each measurement point the temperature recorded by the thermocouple shall be stable
before a temperature reading is taken.
Nine temperature readings are obtained T (i = axis 1 to 3; j = level a to c for +30 mm; 0 mm and
i;j
–30 mm) as indicated in Table 2.
Table 2 — Position of furnace wall temperature readings
Level
Vertical axis a at 30 mm b at 0 mm c at – 30 mm
1 (at 0 0) T T T
1;a 1;b 1;c
2 (at 120 0) T T T
2;a 2;b 2;c
3 (at 240 0) T T T
3;c 3;b 3;c
7.3.1.2 Calculate and record the arithmetic mean of the nine temperature readings recorded in
7.3.1.1 as the average furnace wall temperature, T .
avg
T T T T T T T T T
1;a 1;b 1;c 2;a 2;b 2;c 3;a 3;b 3;c
Tavg (1)
9
Calculate the arithmetic means of the temperature readings on the three axes recorded in 7.3.1.1 as
the three vertical axes average furnace wall temperatures.
T T T
1;a 1;b 1;c
T (2a)
avg.axis1
3
T T T
2;a 2;b 2;c
T (2b)
avg.axis2
3
T T T
3;a 3;b 3;c
(2c)
T
avg.axis3
3
15
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SIST EN ISO 1182:2002
EN 1182:2002 (E)
Calculate the absolute percentage value of the deviations of the temperature on the three axes from
the average furnace wall temperature.
T T
. 1
avg avg axis
T 100 (3a)
dev.axis1
T
avg
T T
avg avg.axis2
T 100 (3b)
dev.axis2
T
avg
T T
avg avg.axis3
T 100 (3c)
dev.axis3
T
avg
Calculate and record the average deviation (arithmetic mean) of the average temperature on each the
three axes and the average furnace wall temperature.
T T T
dev.axis1 dev.axis2 dev.axis3
T (4)
. .
avg dev axis
3
Calculate the arithmetic means of the temperature readings on the three levels recorded in 7.1.6.1 as
the three level average furnace wall temperatures.
T T T
1;a 2;a 3;a
(5a)
T
avg.level a
3
T T T
1; 2; 3;
b b b
(5b)
T
avg.levelb
3
T T T
1;c 2;c 3;c
(5c)
T
avg.level c
3
16
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SIST EN ISO 1182:2002
EN 1182:2002 (E)
Calculate the absolute percentage value of the deviations of the temperature on the three levels from
the average furnace wall temperature.
T T
avg avg.level a
(6a)
T 100
dev.level a
T
avg
T T
avg avg.level b
(6b)
T 100
dev.level b
T
avg
T T
avg avg.level c
(6c)
T 100
dev.level c
T
avg
Calculate and record the average deviation (arithmetic mean) of the average temperature on each of
the three levels and the average furnace wall temperature.
T T T
dev.level a dev.level b dev.level c
T (7)
avg.level c
3
The average deviation of the temperature on the three vertical axes from the average furnace wall
T (4) shall be less than 0,5 %.
temperature
avg.dev.axis
The average deviation of the temperature on the three levels from the average furnace wall
temperature T (7) shall be less than 1,5 %.
avg.dev.level
7.3.1.3 Check that the average wall temperature at level (+30 mm) T (5a) is less than the
avg.level a
the average wall temperature at level (-30 mm), T (5c).
avg.level c
7.3.2 Furnace temperature
When the furnace temperature is stabilized as given in 7.2.4 and when the furnace wall temperature
is checked as given in 7.3.1, measure the temperature of the furnace along its central axis using the
thermal sensor specified in 4.5 and the temperature indicator specified in 4.12. The following
procedure shall be achieved using a suitable positioning device to locate precisely the thermal sensor.
The reference for the vertical positioning shall be the top surface of the copper cylinder of the thermal
sensor.
Record the temperature of the furnace along its central axis at a position corresponding to the mid
height point of the furnace tube.
From this position, move the thermal sensor downwards in steps of maximum 10 mm until the bottom
of the furnace tube is reached and record the temperature at each position once it has stabilized.
Move the thermal sensor from the lowest position upwards in steps of maximum 10 mm until the top
of the furnace is reached and record the temperature in each position once it has stabilized.
From the top of the furnace move the thermal sensor downwards in 10 mm steps until the mid point of
the furnace is reached and record the temperature in each position once it has stabilized.
17
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SIST EN ISO 1182:2002
EN 1182:2002 (E)
For each position, two temperatures are recorded, one going upwards and one downwards. Report
the arithmetic mean of these temperature records with distance.
The calculated mean temperature at each level used shall be inside the limits specified as follows
(see Figure 5):
-4 3 -7 4
T = 541,653 + (5,901 x) – (0,067 x²) + (3,375 10 x ) – (8,553 10 x )
min
-4 3 -6 4)
T = 613,906 + (5,333 x) – (0,081 x² ) + (5,779 10 x )- (1,767 10 x
max
where x is the furnace height in mm and x =0 mm corresponds to the bottom of the furnace
The values in Figure 5 are given in Table 3.
18
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SIST EN ISO 1182:2002
EN 1182:2002 (E)
3
150
3
140
5
130
120
110
4
100
90
80
1
70
60
50
40
30
20
10
6
0
550 570 590 610 630 650 670 690 710 730 750 770
2
Key
1 Furnace height (mm)
2 Temperature (°C)
3 Top of the furnace
4 Lower limit (T min)
5 Upper limit (T max)
6 Bottom of the furnace
Figure 5 — Furnace temperature profile along its central axis measured with the thermal sensor
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SIST EN ISO 1182:2002
EN 1182:2002 (E)
Table 3 — Furnace temperature profile values
furnace height T T
min max
(mm) (°C) (°C)
145 639,4 671,0
135 663,5 697,5
125 682,8 716,1
115 697,9 728,9
105 709,3 737,4
95 717,3 742,8
85 72
...
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