EN 1857:2003
(Main)Chimneys - Components - Concrete flue liners
Chimneys - Components - Concrete flue liners
This European Standard specifies the material, dimensional and performance requirements, including methods of test, for factory-made concrete flue liners and fittings for the construction of multi-wall chimneys.
This standard also relates to storey-height and reinforced flue liners.
NOTE 1 Classes in this standard, unless otherwise specified, e.g. resistance to fire, are not derived from conditions referred to in article 3.2 of Directive 89/106/EC, and should only be considered as technical classes in the sense of Commission Guidance Paper E 'Levels and classes in the Construction Products Directive'.
NOTE 2 Any reference to the term flue liners implies both flue liners and their fittings, except where otherwise indicated.
Abgasanlagen - Bauteile - Betoninnenrohre
Diese Europäische Norm legt Werkstoffe, Maße, Leistungsanforderungen sowie die Prüfverfahren für werkmäßig hergestellte Betoninnenrohre und -formstücke fest.
Diese Norm gilt ebenfalls für geschosshohe und bewehrte Innenrohre.
ANMERKUNG 1 Wenn nicht anders festgelegt, ist die Klassenbildung z.B. für Temperatur, Druck in dieser Norm, nicht von den Bedingungen nach Artikel 3.2 der Richtlinie 89/106/EG abgeleitet und sollte nur als technische Klasse im Sinne des Leitpapiers E "Grenzwerte und Klassen in der Bauproduktenrichtlinie" verstanden werden.
ANMERKUNG 2 Der Begriff �Innenrohr" bedeutet in dieser Norm immer �Innenrohr und seine Verbindungsstücke", außer er ist ausdrücklich anders bezeichnet.
Conduits de fumée - Composants - Conduits intérieurs en béton
La présente Norme européenne spécifie les prescriptions relatives aux matériaux, les dimensions et les performances, ainsi que les méthodes d'essai, pour les conduits de fumée intérieurs et les accessoires préfabriqués en béton destinés à la réalisation de conduits de fumée multiparois.
La présente norme couvre également les conduits intérieurs hauteur d'étage et les conduits intérieurs armés.
NOTE 1 Les classes de cette norme, ainsi que les valeurs spécifiées telles que par exemple températures, pressions, ne constituent pas l'application des conditions mentionnées à l'article 3.2 de la Directive 89/106/EC et devraient seulement être considérées comme des classes techniques au sens du guide E de la commission « Niveau et classes dans la Directive produits de Construction ».
NOTE 2 Toute référence au terme conduit implique l'ensemble des conduits et leurs accessoires, sauf si indication différente.
Dimniki – Sestavni deli – Betonske tuljave za dimnike
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 1857:2003
01-december-2003
Dimniki – Sestavni deli – Betonske tuljave za dimnike
Chimneys - Components - Concrete flue liners
Abgasanlagen - Bauteile - Betoninnenrohre
Conduits de fumée - Composants - Conduits intérieurs en béton
Ta slovenski standard je istoveten z: EN 1857:2003
ICS:
91.060.40
91.100.30
SIST EN 1857:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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EUROPEAN STANDARD
EN 1857
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2003
ICS 91.060.40; 91.100.30
English version
Chimneys - Components - Concrete flue liners
Conduits de fumée - Composants - Conduits intérieurs en Abgasanlagen - Bauteile - Betoninnenrohre
béton
This European Standard was approved by CEN on 2 December 2002.
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,
Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, 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
© 2003 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1857:2003 E
worldwide for CEN national Members.
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EN 1857:2003 (E)
Contents
Page
Foreword. 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Materials and designations of flue liners . 6
5 Reinforcement. 9
6 Surface treatment . 9
7 Tolerances. 10
8 Performance requirements. 11
9 Designation . 14
10 Marking . 14
11 Product information . 14
12 Evaluation of conformity. 15
Annex A (normative) Test methods . 16
Annex B (informative) Illustrations of joint types . 34
Annex C (normative) Thermal resistance calculation method. 35
Annex D (normative) Requirements of sampling plan according to ISO 2859-1 at an
Acceptable Quality Level (AQL) and inspection level S2 Inspection procedure . 37
Annex ZA (informative) Clauses of this European Standard addressing the provisions of
EU Construction Products Directive . 42
Bibliography. 47
2
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EN 1857:2003 (E)
Foreword
This document (EN 1857:2003) has been prepared by Technical Committee CEN /TC 166,
"Chimneys" the secretariat of which is held by UNI.
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 January 2004, and conflicting national standards shall
be withdrawn at the latest by April 2005.
This document has been prepared under a mandate given to CEN by the European Commission and
the European Free Trade Association and supports essential requirements of EU Directives.
For the relationship with the EU Directives, see informative Annex ZA, which is an integral part of this
standard.
This standard is one of a series of standards dealing with the specification, design, testing and execution
of chimneys with concrete liners, both single and multi wall.
The co-ordinated package of standards is further divided by material of construction and this European
Standard is one of a series of specifications and execution documents dealing with design and execution
of concrete chimney products and systems.
The standards in this series for concrete chimney products are :
EN 1857, Chimneys - Components - Concrete flue liners
EN 1858, Chimneys - Components - Concrete flue blocks
EN 12446, Chimneys - Components - Concrete outer wall elements
In this European Standard the Annexes A, C and D are normative and Annexes B and ZA are informative.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Czech
Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg,
Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and the United Kingdom.
3
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EN 1857:2003 (E)
1 Scope
This European Standard specifies the material, dimensional and performance requirements, including
methods of test, for factory-made concrete flue liners and fittings for the construction of multi-wall
chimneys.
This standard also applies to storey-height and reinforced flue liners.
NOTE 1 Classes in this standard, unless otherwise specified, e.g. temperature pressure, are not derived from
conditions referred to in article 3.2 of Directive 89/106/EC, and should only be considered as technical classes in the
sense of Commission Guidance Paper E ‘Levels and classes in the Construction Products Directive’.
NOTE 2 Any reference to the term flue liners implies both flue liners and their fittings, except where otherwise
indicated.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications.
These normative references are cited at the 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 1443:2003, Chimneys — General requirements
EN 1859:2000, Chimneys— Metal chimneys — Test methods
EN 10088-2, Stainless steels — Part 2: Technical delivery conditions for sheet/plate and strip for general
purposes
EN 10218-2, Steel wire and wire products. - General — Part 2: Wire dimensions and tolerances
EN 13384-1 Chimneys – Thermal and fluid dynamic calculation methods – Part 1 : Chimneys serving
one appliance
ISO 2859-1, Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by
acceptable quality limit (AQL) for lot-by-lot inspection (ISO 2859-1:1999).
EN ISO 7500-1, Metallic materials — Verification of static uniaxial testing machines — Part 1:
Tension/compression testing machines (ISO 7500-1:1999)
3 Terms and definitions
For the purposes of this European Standard the terms and definitions given in EN 1443:2003 and the
following apply.
3.1
flue liner bend
flue liner that changes the direction of the flue
3.2
manufacturer’s declared internal transverse dimensions
internal dimensions of the flue liner measured perpendicular to the longitudinal axis
4
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EN 1857:2003 (E)
3.3
manufacturer’s declared length
internal length of the flue liner.
NOTE Examples of measurement are shown in Figure 1.
a) with rebate b) with plain end
L Internal length
Figure 1 — Manufacturers declared length
3.4
manufacturer’s declared structural height
maximum height of construction of the flue liners as declared by the manufacturer
3.5
reinforced flue liner
flue liner having reinforcement to assist handling
NOTE The reinforcement is not for structural stability
3.6
storey-height liner
flue liner having manufacturer’s declared length relating to the floor to floor height of a building
3.7
concrete
material formed by mixing cement, aggregate and water and with or without the incorporation of
admixtures or additions, which develops its properties by hydration of the cement
[EN 206-1:2000]
3.8
precast concrete
concrete cast and cured in a place other than the final location of use
5
L
L
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EN 1857:2003 (E)
3.9
resistance to fire of flue liners
ability of the flue liners and fittings to be resistant to soot fires
4 Materials and designations of flue liners
4.1 Materials
Flue liners shall be precast concrete.
Materials used shall be identified for factory production control purposes.
NOTE 1 Additions may include glass or steel fibres.
NOTE 2 Attention is drawn to Commission decision 96/603/EC, as amended, in which non-combustible
masonry units containing not more than a mass or volume fraction of 1 % (whichever is the more onerous) of
homogeneously distributed organic materials are classified as reaction to fire class A1 without testing.
4.2 Designations and classes
4.2.1 General
Flue liners shall be designated according to clause 9.
Designation classes for flue liners for temperature, pressure, resistance to soot fire, condensate
resistance and corrosion resistance shall be according to 4.2.1 to 4.2.5.
Abbreviated designations for common types of flue liners, according to temperature, pressure, soot fire
resistance, and condensate resistance (wet or dry conditions) are given in Table 1.
Where a flue liner is manufactured for an application not covered by the abbreviated designations A to L
the manufacturer shall declare the characteristics and appropriate designation in full as in clause 9.
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EN 1857:2003 (E)
Table 1 — Abbreviated designations for common types of concrete flue liners
Temperature Pressure Sootfire
Condensate resistance
Type resistance
A1 T600 Negative N1 Yes G Dry
A2 T600 Negative N2 Yes G Dry
B1 T450 Negative N1 Yes G Dry
B2 T450 Negative N2 Yes G Dry
B3 T450 Negative N1 No O Dry
C1 T400 Negative N1 Yes G Dry
C2 T400 Negative N2 Yes G Dry
C3 T400 Negative N1 No O Dry
D1 T300 Negative N1 No O Dry
D2 T300 Negative N1 No O Wet and Dry
D3 T300 Positive P1 No O Wet and Dry
E1 T250 Negative N1 No O Dry
E2 T250 Negative N1 No O Wet and Dry
E3 T250 Positive P1 No O Wet and Dry
F1 T200 Negative N1 No O Dry
F2 T200 Negative N1 No O Wet and Dry
G1 T160 Negative N1 No O Wet and Dry
G2 T160 Positive P1 No O Wet and Dry
H1 T140 Negative N1 No O Wet and Dry
H2 T140 Positive P1 No O Wet and Dry
J1 T120 Negative N1 No O Wet and Dry
J2 T120 Positive P1 No O Wet and Dry
K1 T100 Negative N1 No O Wet and Dry
K2 T100 Positive P1 No O Wet and Dry
L1 T80 Negative N1 No O Wet and Dry
L2 T80 Positive P1 No O Wet and Dry
NOTE A designated class of flue liner is suitable for use in a chimney with nominal working
temperature up to a maximum of that designated. The designation for pressure, soot fire resistance,
condensate resistance and corrosion resistance apply throughout the temperature range.
7
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EN 1857:2003 (E)
4.2.2 Temperature class.
For temperature class see Table 2.
Table 2 — Temperature class
Nominal working temperature
Temperature class
o
C
T600 600
T450 450
T400 400
T300 300
T250 250
T200 200
T160 160
T140 140
T120 120
T100 100
T080 80
4.2.3 Pressure class
For pressure classes see Table 3. The pressure class is assigned a gas tightness level, expressed as a
maximum leakage rate at a specified test pressure.
for flue liners suitable for negative pressure chimneys : N1 and N2;
for flue liners suitable for positive pressure chimneys : P1 and P2.;
for flue liners suitable for high positive pressure chimneys : H1 and H2.
Table 3 — Pressure classes and gas tightness
Pressure class Test pressure Gas tightness –
Maximum
leakage rate
2
Pa L/s/m
N1 40 2,0
N2 20 3,0
P1 200 0,006
P2 200 0,120
H1 5000 0,006
H2 5000 0,120
8
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EN 1857:2003 (E)
4.2.4 Sootfire resistance class
Sootfire resistance classes :
O for flue liners for chimneys without sootfire resistance;
G for flue liners for chimneys with sootfire resistance.
4.2.5 Condensate resistance class
Condensate resistance classes :
W for flue liners for chimneys intended to operate under wet conditions;
D for flue liners for chimneys intended to operate under dry conditions.
4.2.6 Corrosion resistance class
Corrosion resistance classes for flue liners for chimneys which convey products of combustion from gas
or light oils and natural wood or heavy oils and solid mineral fuels, are given in Table 4.
Table 4 — Corrosion resistance classes
Corrosion from products of Gas Light oils with sulphur Heavy oils with sulphur content
combustion according to content up to 0,2% and over 0,2% and solid mineral
fuel used natural wood fuels and peat
Corrosion resistance class12 3
of flue liners
5 Reinforcement
5.1 In a reinforced liner the reinforcement shall have a diameter of not more than 8 mm and a
minimum concrete cover of 20 mm on all sides.
3
, when measured according to
5.2 In reinforced liners having a bulk density of less than 2 000 kg/m
A.10, any reinforcement shall be protected against corrosion by:
a) use of stainless steel conforming to EN 10088-2;
b) by completely covering any mild steel reinforcement conforming to EN 10218-2 with a coating.
NOTE Typically ordinary Portland cement mixed with water to form a slurry or epoxy resin.)
6 Surface treatment
Any surface treatment of the flue liner, e.g. coatings, shall be factory applied before the product is tested.
9
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EN 1857:2003 (E)
7 Tolerances
7.1 Size
Tolerances on manufacturer’s declared dimensions, including taper, shall be :
a) Declared internal transverse dimensions
below 300 mm : ± 3 mm
300 mm and above : ± 3 % but not more than 10 mm. See A.1.1.
b) Declared length
below 300 mm : ± 5 mm
300 mm to 700 mm : ± 7 mm
above 700 mm : ± 3 % but not more than 10 mm. See A.1.2.
c) Declared wall thickness
below 10 mm : + 2 mm
- 1 mm
10 mm to 40 mm : + 5 mm
- 1,5 mm
above 40 mm : + 12 %
- 5 %
7.2 Straightness
7.2.1 When tested as described in A.2 the limit deviation from straightness of a straight concrete
flue liner of manufacturer’s declared length less than or equal to 1 000 mm shall not be greater than
1% of the declared length.
7.2.2 When tested as described in A.2 for flue liners having a manufacturer’s declared length
greater than 1 000 mm the limit deviation shall not be greater than 0,5 % of the manufacturer’s
declared length.
7.3 Squareness of ends
When tested in accordance with either procedure described in A.3 the flue liner shall not touch the upright
for the first procedure and the dimension ‘G’ shall not be greater than 5 mm for the second procedure.
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EN 1857:2003 (E)
8 Performance requirements
8.1 Heat stress resistance
8.1.1 When a flue liner is tested in accordance with A.4 to the test temperature appropriate to the
flue liner designation given in Table 5, the flue liner shall subsequently meet the requirements of 8.3.
The thermal testing shall be carried out on one size of flue liner for each geometrical configuration, e.g.
circular, rectangular, square, also for each material mix, method of manufacture and wall thickness. For
circular flue liners the size to be tested shall be (200 50) mm internal transverse dimension. For other
geometrical configurations the flue liner shall have an equivalent cross-sectional area.
Table 5 — Heat stress test temperature
Temperature class Temperature of flue gas
°C
50
T 600
700
0
50
T 450
550
0
50
T 400
500
0
35
T 300
350
0
30
T 250
300
0
25
T 200
250
0
19
T 160
190
0
17
T 140
170
0
15
T 120
150
0
12
T 100
120
0
10
T 080
100
0
8.1.2 Flue liner bends or fittings made of the same material mix and by the same method of
manufacture as the tested straight flue liner shall be deemed to conform to the requirement in 8.1.1.
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EN 1857:2003 (E)
8.1.3 Flue liner bends or fittings made of a different material mix or using a different method of
manufacture from those described in 8.1.1, shall be checked for heat stress resistance by testing a
straight test sample in accordance with 8.1.1.
This straight test sample shall be made using the same material mix and manufacturing method as the
bend or fitting.
8.2 Heat shock resistance
8.2.1 Following the heat stress resistance test in 8.1, when a liner designated as soot fire resistant
is tested as described in A.4.4 to a flue gas temperature of 1 000 °C for a period of (30 ± 1) min the
flue liner shall subsequently meet the requirements of 8.3.
8.2.2 Flue liner bends or fittings made of the same material mix and by the same method of
manufacture as the tested straight flue liner shall be deemed to conform to the requirement in 8.2.1.
8.2.3 Flue liner bends or fittings made of a different material mix or using a different method of
manufacture from those described in 8.2.1, shall be checked for heat shock by testing a straight test
sample in accordance with 8.2.1. This straight test sample shall be made using the same material mix
and manufacturing method as the bend or fitting.
8.3 Gas tightness
When tested in accordance with A.6 the gas tightness, expressed as a leakage rate of the walls of the flue
liner, shall not be greater than the values specified in Table 3 for the relevant pressure class.
8.4 Abrasion resistance
All flue liners having satisfied the gas tightness requirements of 8.3, when tested according to A.7 the
2
weight of the deposit collected shall not exceed 0,03 kg/m of the total area of the inner surface of the flue,
and shall subsequently meet the gas tightness requirements of 8.3.
8.5 Compressive strength
8.5.1 The manufacturer shall declare the structural height. When tested according to A.8, flue liners
and straight fittings shall withstand an intensity of loading equivalent to four times the manufacturer’s
declared structural height.
NOTE The manufacturers’ declared structural height may be derived from the ultimate compressive strength
determined by the method in A.11
8.5.2 Flue liner bends or other fittings made of the same material mix and by the same method of
manufacture as the tested straight flue liner shall be deemed to conform to the requirement in 8.5.1.
8.5.3 Flue liner bends or fittings made of a different material mix or using a different method of
manufacture from those described in 8.5.2, shall be checked for compressive strength by testing a
special straight test sample in accordance with 8.5.1.
This special straight test sample shall be made using the same material mix and manufacturing method
as the bend or fitting.
8.6 Flexural strength
There is no requirement for flexural strength as flue liners are not stand alone elements but are built with
an outer wall to form a chimney.
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EN 1857:2003 (E)
8.7 Corrosion resistance
When flue liners designated condensate resistance class W (suitable for use in wet operating conditions)
are tested as described in A.9, the weight loss of the pieces shall not be greater than 0,1 %.
Flue liners designated condensate resistance class D (dry) and which conform to 8.1 to 8.4 may be
assigned corrosion resistance class 3.
8.8 Condensate resistance
When flue liners designated W (for use in wet operating conditions) are tested as described in A.9 the
+1
maximum mass of test solution passing through the wall of the flue liner during any h test period
24
0
2
shall not be greater than 0,5 g/h·m of the flue liner external surface.
8.9 Bulk density
When flue liners are tested as described in A.10 each bulk density value shall be within a limit deviation of
± 10 % of the manufacturers declared bulk density for the flue liner.
8.10 Thermal resistance
Thermal resistance shall be measured according to the method given in A.5 or calculated according to the
method given in Annex C and its value declared by the manufacturer.
8.11 Resistance to freeze/thaw
Flue liners are not subject to freeze-thaw as they are not stand alone elements but are protected in a
chimney by an outer wall.
8.12 Flow resistance
8.12.1 Flow resistance of flue liners
The manufacturer shall declare the mean value of roughness for a flue liner determined either:
a) by testing in accordance with EN 1859 or
b) from the data obtained in EN 13384-1.
8.12.2 Flow resistance of fittings
The manufacturer shall declare the coefficient of flow resistance due to a directional and/or cross
sectional and/or mass flow change which shall be determined according to the method of EN 1859 or
obtained from the data in EN 13384-1.
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EN 1857:2003 (E)
9 Designation
All concrete flue liners to this standard shall be designated in accordance with 4.2, for which an example
of a designation system is given below :
EN 1857 T 400 N1 D 2 G
The number of this standard
Flue gas temperature class
Negative/positive pressure class
Resistance to condensate
Corrosion resistance
Fire resistance (Sootfire resistance G or O)
10 Marking
A minimum of 20 % of flue liners or fittings in each consignment shall be legibly and indelibly marked or
labelled with the following information :
a) the name or trademark of the manufacturer;
b) the manufacturers batch or date code;
c) the number of this European Standard;
d) the class or classes or full designation;
e) an arrow indicating direction of flue gas flow.
NOTE For CE marking and labelling, see ZA.3.
11 Product information
The manufacturer's printed literature for the product shall include the following:
a) the manufacturer's product description;
b) manufacturer's declared sizes;
c) the product designation;
d) manufacturer's declared structural height;
e) detailed installation instructions including method of jointing.
NOTE For CE marking requirements for information on the product, see ZA.3.
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EN 1857:2003 (E)
12 Evaluation of conformity
12.1 Initial type testing
Type test relating to material composition shall be performed initially together with factory production
control tests as given in Table 6. One test shall be carried out for each requirement.
The thermal testing shall be carried out on one size of flue liner for each geometrical configuration,
e.g. circular, square, rectangular. For circular flue liners, the size to be tested shall be 200 mm ± 50
mm internal diameter. For other geometrical configurations, the flue liner shall have an equivalent
cross-sectional area range.
12.2 Further type tests
Type tests shall be performed when a change is made either in material composition, processing
technique or to the design or method of manufacture of the flue liner, but they may be performed more
frequently by incorporation into a plan for monitoring the consistency of manufacture (see Table 6).
Table 6 — Factory production control and type tests
Relevant requirement clauses
Item
Factory production control Type tests
a
12.3 12.1 and 12.2
Straight flue liners 4.1; 5; 6; 7.1, 7.2; 7.3; 8.3; 8.5 and 8.1; 8.2; 8.3; 8.4; 8.5;
8.9 8.6; 8.7; 8.8; 8.10 and
8.11, 8.12
a
The tests carried out during FPC are intended to verify that the performance
requirements assessed through the initial type testing are maintained.
12.3 Factory production control
To achieve compliance with this standard, the manufacturer shall establish and maintain an effective
documented quality system.
Factory production control tests are carried out following manufacture to monitor the quality of product
(see Table 6).
Sampling and testing of any batch shall be completed prior to removal from the works and shall be in
accordance with ISO 2859-1 at an AQL of 10 % and inspection level S2. Isolated batches of units shall
be assessed in accordance with tightened inspection procedures, with a maximum batch size of 2 500
(see Annex D).
Batches rejected under the factory production control procedure may be resubmitted once, after
removal of units with previously undetected visible defects, under the tightened inspection procedures,
in respect only of the defect that caused initial rejection.
NOTE A quality system assessed by a certification body which complies with the requirements of EN 45012
may be applied to ensure that the requirements of EN ISO 9001 and clause 12 are complied with.
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EN 1857:2003 (E)
Annex A
(normative)
Test methods
A.1 Measurement of dimensions
A.1.1 Transverse dimensions
The maximum and minimum internal transverse dimensions of the flue liner shall be those calculated from
the manufacturer’s declared tolerances and the tolerances specified in 7.1. If direct measurement is to be
carried out, two measurements should be taken at the observed maximum and minimum diameters.
The test also can be carried out using two gauges whose diameters are set at the minimum and
°
maximum diameters. The minimum gauge should be able to be turned through 360 within the whole
length of the flue liner. The maximum gauge should not be able to enter the flue liner when turned through
°
a rotation of 360 .
For square and rectangular flue liners, the internal transverse dimensions shall be measured between the
mid points of opposite sides of the flue liner.
A.1.2 Declared length
The maximum and minimum declared lengths of a flue liner shall be those calculated from the
manufacturer’s declared dimensions and the tolerances specified in 7.1. If direct measurement is to be
carried out, two measurements should be taken at the observed maximum and minimum internal lengths.
The test can also be carried out by using two gauges whose heights are set at the minimum and
maximum internal lengths. The minimum gauge should not be able to fit over the internal length of the flue
liner. The maximum gauge should be able to fit over the internal length of the flue liner.
A.1.3 Wall thickness
The maximum and minimum wall thickness dimensions shall be those calculated from the manufacturer’s
declared dimensions and the tolerances specified in 7.1 or direct measurement is to be carried out at the
observed maximum and minimum thickness.
A.2 Straightness
A.2.1 Apparatus
A straightness measuring device, such as a straight edge, having a length 100 mm less than the nominal
length of the flue liner under test.
A.2.2 Procedure
A.2.2.1 Place the measuring device along the line L as shown in Figure A.1
T
A.2.2.2 Measure the maximum distance from the centre of the straight line created by the
apparatus in A.2.1 spanning any concave curve on the outside of the flue liner to the flue liner surface
(D ) as shown in Figure A.1
S
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EN 1857:2003 (E)
A.2.3 Result
Record any case where D is greater than 1% or, in the case of liners equal to or greater than
S
1000 mm in length, any case where D is greater than 0,5 % of the declared length.
S
L /2 L /2
T T
L
T
L
N
Key
L is the nominal length of the flue liner in mm;
N
L is the test length in mm;
T
D is the deviation from straightness in mm;
S
L - L = 100 mm.
N T
Figure A.1 — Straightness test
A.3 Squareness of ends test
A.3.1 Apparatus
A level test bench with a fixed upright at 90°, see Figure A.2 a);
A square having one arm 300 mm long and second arm 400 mm long.
A.3.2 First procedure
Place the flue liner upright on the test bench with the base of the liner touching the collar. Rotate the liner
through 360°.
A.3.3 Result
Record any case where the flue liner touches the upright.
A.3.4 Second procedure
Place the flue liner upright on the test bench and apply one arm of the square along its side with the other
arm touching the end of the liner. Rotate the square a
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