Chimneys - Requirements for metal chimneys - Part 2: Metal flue liners and connecting flue pipes

This document specifies the characteristics of performance for rigid or flexible metal flue liners, rigid metal connecting flue pipes and their fittings used to convey the products of combustion from appliances to the outside atmosphere (including their supports).
This document specifies sootfire resistant flue liners, connecting flue pipes and fittings for combustion appliances burning solid, liquid and gaseous fuels and non-sootfire resistant flue liners, connecting flue pipes and fittings for combustion appliances burning liquid and gaseous fuels only.
NOTE      This means that flue liners, connecting flue pipes and fittings designated "O" are not suitable for combustion appliances burning solid fuel.
Vitreous enamelled connecting flue pipes are also covered by this document.
Rigid flue liners can be used as flue liners for renovation or adaptation of existing chimneys and as flue liners of custom built chimneys.
Flexible metal flue liners described in this document are exclusively for renovation or adaptation of existing chimneys. Flexible connecting flue pipes and extensible flexible products designed to be compressed or extended along their length are excluded from the scope of this document.
This document also specifies the characteristics for marking, manufacturer's instructions, product information and evaluation of conformity.
Single wall and multi-wall system chimney products (chimney sections, chimney fittings and terminals, including supports) are covered by prEN 1856-1:2019, even if used as liners for existing chimneys or connecting flue pipes.

Abgasanlagen - Anforderungen an Metall-Abgasanlagen - Teil 2: Innenrohre und Verbindungsstücke aus Metall

Dieses Dokument legt die Leistungseigenschaften für starre und flexible Metallinnenrohre, starre Verbindungsstücke aus Metall und deren Formstücke fest, welche zur Abführung von Verbrennungsprodukten von Feuerstätten an die Außenluft verwendet werden (einschließlich ihrer Halterungen).
Dieses Dokument legt die Spezifikation von rußbrandbeständigen Innenrohren, Verbindungsstücken und Formstücken für Verbrennungseinrichtungen zur Verbrennung fester, flüssiger und gasförmiger Brennstoffe sowie von nicht rußbrandbeständigen Innenrohren, Verbindungsstücken und Formstücken für Verbrennungseinrichtungen nur zur Verbrennung flüssiger und gasförmiger Brennstoffe fest.
ANMERKUNG   Das bedeutet, dass die mit einem "O" gekennzeichneten Innenrohre, Verbindungsstücke und Formstücke nicht für Verbrennungseinrichtungen geeignet sind, in denen feste Brennstoffe verbrannt werden.
Emaillierte Verbindungsstücke sind ebenfalls Gegenstand dieses Dokuments.
Starre Innenrohre können auch als Abgasrohre zur Sanierung oder Querschnittsverminderung bestehender Abgasanlagen sowie als Abgasrohre für maßgefertigte Abgasanlagen verwendet werden.
Flexible Metallinnenrohre nach diesem Dokument werden ausschließlich bei Sanierung oder Querschnittsanpassung einer bestehenden Abgasanlage eingesetzt. Flexible Verbindungsstücke und ausziehbare flexible Produkte, die in ihrer Länge zusammengeschoben oder ausgezogen werden können, fallen nicht in den Anwendungsbereich dieses Dokuments.
Dieses Dokument legt darüber hinaus Merkmale der Kennzeichnung, der Anleitungen des Herstellers, der Produktangaben und der Konformitätsbewertung fest.
Einschalige und mehrschalige System-Abgasanlagen (Abschnitte der Abgasanlagen, Formstücke und Aufsätze, einschließlich der Stützen) werden in prEN 1856 1:2019* behandelt. Dies gilt auch für Innenrohre von bestehenden Abgasanlagen oder für Verbindungsstücke.

Conduits de fumée - Prescriptions pour les conduits de fumée métalliques - Partie 2 : Tubages et éléments de raccordements métalliques

Le présent document spécifie les caractéristiques de performances des tubages métalliques rigides ou flexibles, des éléments de raccordement métalliques rigides et de leurs éléments de conduit de fumée utilisés pour évacuer dans l'atmosphère extérieure les produits de combustion provenant des appareils (supports compris).
Le présent document spécifie les tubages, les conduits de raccordement et les autres éléments de conduit résistants au feu de cheminée pour les appareils de combustion à combustibles solides, liquides et gazeux ainsi que les tubages, les conduits de raccordement et les autres éléments de conduit non résistants au feu de cheminée pour les appareils de combustion à combustibles liquides et gazeux uniquement.
NOTE      Cela signifie que les tubages, conduits de raccordement et autres éléments de conduit désignés « O » ne sont pas appropriés pour des appareils de combustion à combustible solide.
Les éléments de raccordement en émail vitrifié relèvent aussi du présent document.
Les tubages rigides peuvent être utilisés comme parois intérieures soit pour la rénovation ou l'adaptation de conduits de fumée déjà installés, soit pour les conduits de fumée construits sur site.
Les tubages métalliques flexibles décrits dans le présent document sont exclusivement destinés à la rénovation ou à l'adaptation des conduits de fumée déjà installés. Les éléments de raccordement flexibles et les produits flexibles extensibles conçus pour être comprimés ou déployés dans le sens de la longueur sont exclus du domaine d'application du présent document.
Le présent document spécifie également les caractéristiques de marquage, les instructions du fabricant, les informations afférentes au produit ainsi que l'évaluation de la conformité.
Les produits à conduits simple paroi et à conduits multiparois (éléments droits, éléments de raccordement et terminaux, supports compris) sont couverts par le prEN 1856-1:2019, même lorsqu'ils sont utilisés en tant que tubages pour des conduits de fumée ou des éléments de raccordement existants.

Dimniki - Zahteve za kovinske dimnike - 2. del: Kovinske tuljave in dimniški priključki

General Information

Status
Not Published
Current Stage
4098 - Decision to abandon - Enquiry
Completion Date
30-Mar-2021

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SLOVENSKI STANDARD
oSIST prEN 1856-2:2019
01-september-2019
Dimniki - Zahteve za kovinske dimnike - 2. del: Kovinske tuljave in dimniški
priključki

Chimneys - Requirements for metal chimneys - Part 2: Metal flue liners and connecting

flue pipes
Abgasanlagen - Anforderungen an Metall-Abgasanlagen - Teil 2: Innenrohre und
Verbindungsstücke aus Metall

Conduits de fumée - Prescriptions pour les conduits de fumée métalliques - Partie 2 :

Tubages et éléments de raccordements métalliques
Ta slovenski standard je istoveten z: prEN 1856-2
ICS:
91.060.40 Dimniki, jaški, kanali Chimneys, shafts, ducts
oSIST prEN 1856-2:2019 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 1856-2:2019
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oSIST prEN 1856-2:2019
DRAFT
EUROPEAN STANDARD
prEN 1856-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2019
ICS 91.060.40 Will supersede EN 1856-2:2009
English Version
Chimneys - Requirements for metal chimneys - Part 2:
Metal flue liners and connecting flue pipes

Conduits de fumée - Prescriptions pour les conduits de Abgasanlagen - Anforderungen an Metall-

fumée métalliques - Partie 2 : Tubages et éléments de Abgasanlagen - Teil 2: Innenrohre und

raccordements métalliques Verbindungsstücke aus Metall

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/TC 166.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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 CEN-CENELEC

Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are

aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without

notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 1856-2:2019 E

worldwide for CEN national Members.
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oSIST prEN 1856-2:2019
prEN 1856-2:2019 (E)
Contents Page

European foreword ....................................................................................................................................................... 5

Introduction .................................................................................................................................................................... 6

1 Scope .................................................................................................................................................................... 7

2 Normative references .................................................................................................................................... 7

3 Terms, definitions, symbols, units and abbreviated terms ............................................................. 8

4 Product characteristics ................................................................................................................................. 8

4.1 Dimensions and tolerance ........................................................................................................................... 8

4.2 Mechanical resistance and stability ......................................................................................................... 9

4.2.1 Rigid flue liners and their fittings ............................................................................................................. 9

4.2.2 Connecting flue pipes and their fittings .................................................................................................. 9

4.2.3 Flexible flue liners .......................................................................................................................................... 9

4.3 Reaction to fire .............................................................................................................................................. 10

4.4 Resistance to fire .......................................................................................................................................... 10

4.4.1 Sootfire resistance classes ........................................................................................................................ 10

4.4.2 Sootfire resistance ....................................................................................................................................... 10

4.4.3 Thermal performance at normal operating conditions ................................................................. 11

4.5 Gas tightness .................................................................................................................................................. 11

4.6 Safety in use.................................................................................................................................................... 12

4.6.1 Accidental human contact ......................................................................................................................... 12

4.6.2 Thermal resistance ...................................................................................................................................... 12

4.6.3 Condensate resistance (vapour phase) ................................................................................................ 12

4.6.4 Condensate penetration (liquid phase) ............................................................................................... 12

4.6.5 Flow resistance ............................................................................................................................................. 12

4.7 Durability ........................................................................................................................................................ 13

4.7.1 Durability against corrosion .................................................................................................................... 13

4.7.2 Freeze thaw resistance ............................................................................................................................... 16

4.7.3 Elastomeric seals .......................................................................................................................................... 16

5 Testing, assessment and sampling methods specific to metal flue liners and

connecting flue pipes .................................................................................................................................. 17

5.1 Measure of diameter of flexible flue liner ........................................................................................... 17

5.1.1 Procedure........................................................................................................................................................ 17

5.1.2 Results .............................................................................................................................................................. 17

5.2 Gas tightness .................................................................................................................................................. 17

5.2.1 General ............................................................................................................................................................. 17

5.2.2 Conditioning and apparatus ..................................................................................................................... 17

5.2.3 Procedure........................................................................................................................................................ 17

5.2.4 Results .............................................................................................................................................................. 17

5.3 Tensile strength ............................................................................................................................................ 17

5.3.1 Test assembly ................................................................................................................................................ 17

5.3.2 Procedure........................................................................................................................................................ 17

5.3.3 Test results ..................................................................................................................................................... 17

5.4 Crushing resistance ..................................................................................................................................... 18

5.4.1 Test apparatus............................................................................................................................................... 18

5.4.2 Procedure........................................................................................................................................................ 18

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5.4.3 Test results ...................................................................................................................................................... 18

5.5 Flexibility test ................................................................................................................................................ 18

5.5.1 Test apparatus ............................................................................................................................................... 18

5.5.2 Test conditioning .......................................................................................................................................... 19

5.5.3 Procedure ........................................................................................................................................................ 19

5.5.4 Results .............................................................................................................................................................. 19

5.6 Torsion strength test ................................................................................................................................... 19

5.6.1 Test apparatus ............................................................................................................................................... 19

5.6.2 Test assembly ................................................................................................................................................. 20

5.6.3 Procedure ........................................................................................................................................................ 20

5.6.4 Results .............................................................................................................................................................. 20

5.7 Thermal performance test ........................................................................................................................ 21

5.7.1 General ............................................................................................................................................................. 21

5.7.2 Apparatus ........................................................................................................................................................ 21

5.7.3 Test structures ............................................................................................................................................... 21

5.7.4 Test samples ................................................................................................................................................... 22

5.7.5 Thermal performance test procedure .................................................................................................. 23

6 Assessment and verification of constancy of performance – AVCP ............................................ 28

6.1 General ............................................................................................................................................................. 28

6.2 Type testing .................................................................................................................................................... 28

6.2.1 General ............................................................................................................................................................. 28

6.2.2 Test samples, testing and compliance criteria ................................................................................... 29

6.2.3 Test reports .................................................................................................................................................... 30

6.2.4 Shared other party results ........................................................................................................................ 30

6.2.5 Cascading determination of the product type results ..................................................................... 31

6.3 Factory production control (FPC) ........................................................................................................... 32

6.3.1 General ............................................................................................................................................................. 32

6.3.2 Characteristics ............................................................................................................................................... 33

6.3.3 Product specific characteristics .............................................................................................................. 35

6.3.4 Initial inspection of factory and of FPC ................................................................................................. 35

6.3.5 Continuous surveillance of FPC ............................................................................................................... 36

6.3.6 Procedure for modifications ..................................................................................................................... 36

6.3.7 One-off components, pre-production products (e.g. prototypes) and components

produced in very low quantity ................................................................................................................. 36

7 Product classification and designation ................................................................................................. 37

7.1 Manufacturer's instructions ..................................................................................................................... 37

7.2 Minimum information to be included in the manufacturer’s documentation and

instructions ..................................................................................................................................................... 37

7.2.1 General ............................................................................................................................................................. 37

7.2.2 Rigid flue liners, and their fittings .......................................................................................................... 37

7.2.3 Connecting flue pipes and their fittings ............................................................................................... 37

7.2.4 Flexible flue liners and their fittings ..................................................................................................... 38

7.3 Classification and designation ................................................................................................................. 38

8 Marking, labelling and packaging ........................................................................................................... 41

8.1 Flue liners, connecting flue pipes and their fittings ......................................................................... 41

8.2 Chimney plate ................................................................................................................................................ 41

8.3 Packaging ......................................................................................................................................................... 41

Annex ZA (informative) Relationship of this European Standard with Regulation (EU)

No.305/2011 .................................................................................................................................................. 43

ZA.1 Scope and relevant characteristics ........................................................................................................ 43

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ZA.2 System of Assessment and Verification of Constancy of Performance (AVCP) ...................... 47

ZA.3 Assignment of AVCP tasks ......................................................................................................................... 47

Bibliography ................................................................................................................................................................. 50

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oSIST prEN 1856-2:2019
prEN 1856-2:2019 (E)
European foreword

This document (prEN 1856-2:2019) has been prepared by Technical Committee CEN/TC 166

“Chimneys”, the secretariat of which is held by ASI.
This document is currently submitted to the CEN Enquiry.

This document has been prepared under a mandate given to CEN by the European Commission and the

European Free Trade Association.

For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this

document.
This document will supersede EN 1856-2:2009.
The main changes in comparison to EN 1856-2:2009 are:

— adoption of the template for harmonized standards under the EU Construction Products Regulation

(305/2011/EU) meaning a clearer definition of the Scope, rewording in Clause 4 "Product

characteristics", Clause 5 "Testing, assessment and sampling methods" and Clause 7 "Product

classification and designation", and adoption of the template for Clause 6 "Assessment and

verification of constancy of performance";
— adoption of the revised "Corrosion tests" specified in prEN 1856-1:2019.
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oSIST prEN 1856-2:2019
prEN 1856-2:2019 (E)
Introduction

The generic word “chimney”, when used in this document, refers to all products used to convey the

products of combustion from appliances to the outside atmosphere, and thus includes all other terms of

common use in the trade, such as: vents, flues, shafts, exhaust systems, ducts, etc.

For addressing the durability against corrosion, a unique corrosion test has been introduced, as described

in prEN 1856-1:2019, Annex A; the material table with minimum material specification of the former

edition has been taken over.
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oSIST prEN 1856-2:2019
prEN 1856-2:2019 (E)
1 Scope

This document specifies the characteristics of performance for rigid or flexible metal flue liners, rigid

metal connecting flue pipes and their fittings used to convey the products of combustion from appliances

to the outside atmosphere (including their supports).

This document specifies sootfire resistant flue liners, connecting flue pipes and fittings for combustion

appliances burning solid, liquid and gaseous fuels and non-sootfire resistant flue liners, connecting flue

pipes and fittings for combustion appliances burning liquid and gaseous fuels only.

NOTE This means that flue liners, connecting flue pipes and fittings designated "O" are not suitable for

combustion appliances burning solid fuel.
Vitreous enamelled connecting flue pipes are also covered by this document.

Rigid flue liners can be used as flue liners for renovation or adaptation of existing chimneys and as flue

liners of custom built chimneys.

Flexible metal flue liners described in this document are exclusively for renovation or adaptation of

existing chimneys. Flexible connecting flue pipes and extensible flexible products designed to be

compressed or extended along their length are excluded from the scope of this document.

This document also specifies the characteristics for marking, manufacturer's instructions, product

information and evaluation of conformity.

Single wall and multi-wall system chimney products (chimney sections, chimney fittings and terminals,

including supports) are covered by prEN 1856-1:2019, even if used as liners for existing chimneys or

connecting flue pipes.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

EN 573-3:2013, Aluminium and aluminium alloys — Chemical composition and form of wrought products

— Part 3: Chemical composition and form of products
EN 1443:2019, Chimneys — General requirements

prEN 1856-1:2019, Chimneys — Requirements for metal chimneys — Part 1: System chimney products

EN 13216-1:2019, Chimneys — Test methods for system chimneys — Part 1: General test methods

EN 10025-5:2004, Hot rolled products of structural steels — Part 5: Technical delivery conditions for

structural steels with improved atmospheric corrosion resistance
EN 10088-1:2014, Stainless steels — Part 1: List of stainless steels

EN 10131:2006, Cold rolled uncoated and zinc or zinc-nickel electrolytically coated low carbon and high

yield strength steel flat products for cold forming — Tolerances on dimensions and shape

EN 10209:2013, Cold rolled low carbon steel flat products for vitreous enamelling — Technical delivery

conditions

EN 10346:2015, Continuously hot-dip coated steel flat products for cold forming — Technical delivery

conditions
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oSIST prEN 1856-2:2019
prEN 1856-2:2019 (E)

EN 13384-1:2015 , Chimneys - Thermal and fluid dynamic calculation methods - Part 1: Chimneys serving

one heating appliance

EN 13501-1:2018, Fire classification of construction products and building elements — Part 1:

Classification using data from reaction to fire tests

EN 14241-1:2013, Chimneys — Elastomeric seals and elastomeric sealants — Material requirements and

test methods — Part 1: Seals in flue liners

EN 15287-1:2007+A1:2010, Chimneys — Design, installation and commissioning of chimneys — Part 1:

Chimneys for non-roomsealed heating appliances
3 Terms, definitions, symbols, units and abbreviated terms

For the purposes of this document, the terms and definitions given in EN 1443:2019 and

prEN 1856-1:2019 and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
3.1
bending radius
minimum radius measured on the inner side of a flexible flue liner when bent
3.2
double skin flexible flue liner

flexible flue liner consisting of two layers of metal, where the inner layer forming the flue is flat and covers

the corrugations
3.3
flue liner kit

flue liner that is installed using a combination of compatible flue liner components, obtained or specified

as a kit from one manufacturing source with product responsibility for the whole flue liner including all

its components
Note 1 to entry: A flue liner kit is not considered a system chimney.
4 Product characteristics
4.1 Dimensions and tolerance

4.1.1 The thickness of materials from which the flue liners, connecting flue pipes and fittings are made

shall be not less than the minimum declared. The tolerance for material thickness shall not be more than

± 10 % of the nominal thickness.

4.1.2 The declared internal diameter of the flue liner, connecting flue pipe and fitting shall not vary by

more than ± 5 mm from the nominal size.
1) This document is impacted by the amendment EN 13384-1:2015/prA1:2018.
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When measured in accordance with the procedure explained in 5.1 the internal diameter of the flexible

flue liner shall not be less than the declared diameter.

For rigid connecting flue pipe, the characteristics given in prEN 1856-1:2019, 4.2.2 shall apply.

For flexible flue liners, the internal diameter shall be measured in accordance with 5.1.

Oval flexible liners shall only be factory made and the ovalization ratio shall not exceed 1,5 maximum.

4.1.3 The installed length of rigid flue liners or rigid connecting flue pipes (measured on an assembly

including at least one joint) shall be in accordance with prEN 1856-1:2019, 4.2.4.

4.2 Mechanical resistance and stability
4.2.1 Rigid flue liners and their fittings

Rigid flue liners and their fittings shall comply with prEN 1856-1:2019, 4.3.1, 4.3.2 and 4.3.3 except wind

load.
4.2.2 Connecting flue pipes and their fittings

Connecting flue pipes and their fittings shall comply with prEN 1856-1:2019, 4.3.1, 4.3.2 and 4.3.3 except

wind load.
4.2.3 Flexible flue liners
4.2.3.1 General

Flexible flue liners shall comply with the characteristics of 4.2.3.2 to 4.2.3.7.

4.2.3.2 Compressive strength of fittings and supports
The relevant design load of fittings and supports shall be declared.

The compressive strength characteristics shall be in accordance with prEN 1856-1:2019, 4.3.1.1 and

4.3.1.2.
4.2.3.3 Tensile strength
The relevant design load of flexible flue liners shall be declared.

The flexible flue liner, when tested in accordance with 5.3, shall meet the gas tightness requirement of

4.4.
4.2.3.4 Crushing resistance

When tested in accordance with 5.4, the outside diameter of the flexible flue liner shall not have been

reduced to less than 75 % of its original nominal diameter and shall meet the gas tightness requirement

of 4.4.
4.2.3.5 Flexibility

When tested in accordance with 5.5, the flexible flue liner shall meet the gas tightness requirement of 4.4.

When tested in accordance with 5.5, the inner layer of the double skin flexible flue liner shall remain

overlapped at the minimum declared bending radius.

Oval flexible liners shall be subjected to the test method of 5.5 in both axes of the oval shape.

4.2.3.6 Torsion strength

When a flexible flue liner is tested in accordance with 5.6, it shall meet the gas tightness requirement of

4.4.
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4.2.3.7 Pulling force

Before the thermal performance test, as per 5.7.4.1.1, it shall be checked that the pulling force measured

shall be less than 0,5 kN (see also Figure 4).
4.3 Reaction to fire

The reaction to fire shall be declared for chimneys, flue liners, connecting flue pipes, components and

accessories. Classification may be carried out via testing according to the relevant product standard and

in accordance with EN 13501-1:2018.

NOTE Metal chimney liners and connecting flue pipes might be classified A1 according to Commission Decision

[96/603/EC (2)] and need no further testing.
4.4 Resistance to fire
4.4.1 Sootfire resistance classes
The sootfire resistance class of the chimney or product shall be declared.
Sootfire resistance classes are:

— O for chimneys, flue liners, connecting flue pipes, components and accessories without sootfire

resistance;

— G for chimneys, flue liners, connecting flue pipes, components and accessories with sootfire

resistance.

For a sootfire resistant flue liner or connecting flue pipe, the characteristics of 4.4.2 shall be fulfilled.

Under a declared normal operating condition, the characteristics of 4.4.3 shall be fulfilled for the

designated temperature class. Additionally, for both classes G and O, the gas tightness given in 4.5 shall

be met.
4.4.2 Sootfire resistance
4.4.2.1 Rigid flue liners and their fittin
...

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