Unplasticized poly(vinyl chloride) (PVC-U) profiles for the fabrication of windows and doors - Classification, requirements and test methods - Part 1: Non-coated PVC-U profiles with light coloured surfaces

This European Standard specifies the classifications, requirements and test methods for non-coated unplasticized poly(vinyl chloride) (PVC-U) profiles with light coloured surfaces intended to be used for the fabrication of windows and doors.
It is applicable to PVC-U profiles with the colorimetric co-ordinates measured on the visible surfaces, as follows:
-   L* ≥ 82 (chromaticity co-ordinate Y ≥ 60),
-   -2,5 ≤ a* ≤ 5,
-   -5 ≤ b* ≤ 15.
NOTE 1   For editorial reasons in this document the term "window" is used for window/door.
NOTE 2   Profiles made from PVC-U materials with reinforcements (e.g. glass fibres) are not part of this scope.

Profile aus weichmacherfreiem Polyvinylchlorid (PVC-U) zur Herstellung von Fenstern und Türen - Klassifizierung, Anforderungen und Prüfverfahren - Teil 1: Nicht beschichtete PVC-U Profile mit hellen Oberflächen

Diese Europäische Norm legt die Klassifizierungen, Anforderungen an und Prüfverfahren für nicht be-schichtete, helle Profile aus weichmacherfreiem Polyvinylchlorid (PVC U) zur Herstellung von Fenstern und Türen fest.
Diese Norm gilt für PVC U-Profile mit den folgenden Farbmaßzahlen, die auf sichtbaren Oberflächen ge¬messen wurden:
- L* ≥ 82 (Farbwertkoordinate Y ≥ 60),
- −2,5 ≤ a* ≤ 5,
- −5 ≤ b* ≤ 15.
ANMERKUNG 1 Aus redaktionellen Gründen wird in diesem Dokument die Benennung „Fenster“ für Fenster/Tür an¬gewendet.
ANMERKUNG 2 Profile aus PVC U-Materialien mit Verstärkungsstoffen (z. B. Glasfasern) liegen außerhalb dieses An¬wendungsbereichs.

Profilés de poly(chlorure de vinyle) non plastifié (PVC-U) pour la fabrication des fenêtres et des portes - Classification, exigences et méthodes d'essai - Partie 1 : Profilés en PVC-U non revêtus avec des faces de teinte claire

La présente Norme européenne spécifie les classifications, les exigences et les méthodes d’essai des profilés de poly(chlorure de vinyle) non plastifié (PVC U) non revêtus avec des faces de teinte claire destinés à être utilisés pour la fabrication des fenêtres et des portes.
Elle s’applique aux profilés en PVC U dont les coordonnées colorimétriques mesurées sur les surfaces visibles sont les suivantes :
-   L* ≥ 82 (coordonnée de chromaticité Y ≥ 60),
-   -2,5 ≤ a* ≤ 5,
-   -5 ≤ b* ≤ 15.
NOTE 1   Pour des raisons éditoriales, dans ce document le terme « fenêtre » est utilisé pour « fenêtre/porte ».
NOTE 2   Les profilés fabriqués à partir de matériau PVC U avec renforts (par exemple des fibres de verre) sont en dehors du présent domaine d’application.

Profili iz trdega polivinilklorida (PVC-U) za izdelavo oken in vrat - Razvrščanje, zahteve in preskusne metode - 1. del: Neprevlečeni PVC-U profili s svetlo površino

General Information

Status
Published
Publication Date
02-Sep-2020
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
27-Aug-2020
Due Date
01-Nov-2020
Completion Date
03-Sep-2020

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SLOVENSKI STANDARD
SIST EN 12608-1:2016+A1:2020
01-oktober-2020

Profili iz trdega polivinilklorida (PVC-U) za izdelavo oken in vrat - Razvrščanje,

zahteve in preskusne metode - 1. del: Neprevlečeni PVC-U profili s svetlo površino

Unplasticized poly(vinyl chloride) (PVC-U) profiles for the fabrication of windows and

doors - Classification, requirements and test methods - Part 1: Non-coated PVC-U
profiles with light coloured surfaces

Profile aus weichmacherfreiem Polyvinylchlorid (PVC-U) zur Herstellung von Fenstern

und Türen - Klassifizierung, Anforderungen und Prüfverfahren - Teil 1: Nicht
beschichtete PVC-U Profile mit hellen Oberflächen

Profilés de poly(chlorure de vinyle) non plastifié (PVC-U) pour la fabrication des fenêtres

et des portes - Classification, exigences et méthodes d'essai - Partie 1 : Profilés en PVC-

U non revêtus avec des faces de teinte claire
Ta slovenski standard je istoveten z: EN 12608-1:2016+A1:2020
ICS:
83.140.99 Drugi izdelki iz gume in Other rubber and plastics
polimernih materialov products
91.060.50 Vrata in okna Doors and windows
SIST EN 12608-1:2016+A1:2020 en,fr,de

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

---------------------- Page: 1 ----------------------
SIST EN 12608-1:2016+A1:2020
---------------------- Page: 2 ----------------------
SIST EN 12608-1:2016+A1:2020
EN 12608-1:2016+A1
EUROPEAN STANDARD
NORME EUROPÉENNE
August 2020
EUROPÄISCHE NORM
ICS 83.140.99; 91.060.50 Supersedes EN 12608-1:2016
English Version
Unplasticized poly(vinyl chloride) (PVC-U) profiles for the
fabrication of windows and doors - Classification,
requirements and test methods - Part 1: Non-coated PVC-U
profiles with light coloured surfaces

Profilés de poly(chlorure de vinyle) non plastifié (PVC- Profile aus weichmacherfreiem Polyvinylchlorid (PVC-

U) pour la fabrication des fenêtres et des portes - U) zur Herstellung von Fenstern und Türen -

Classification, exigences et méthodes d'essai - Partie 1 : Klassifizierung, Anforderungen und Prüfverfahren -

Profilés en PVC-U non revêtus avec des faces de teinte Teil 1: Nicht beschichtete PVC-U Profile mit hellen

claire Oberflächen

This European Standard was approved by CEN on 15 January 2016 and includes Amendment 1 approved by CEN on 15 June

2020.

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 CEN-CENELEC 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 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12608-1:2016+A1:2020 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 12608-1:2016+A1:2020
EN 12608-1:2016+A1:2020 (E)
Contents Page

1 Scope .................................................................................................................................................................... 6

2 Normative references .................................................................................................................................... 6

3 Terms and definitions ................................................................................................................................... 7

3.1 General ................................................................................................................................................................ 7

3.2 Profile definitions ........................................................................................................................................... 7

3.3 Geometrical definitions ................................................................................................................................ 8

3.4 Material definitions ........................................................................................................................................ 9

4 Classifications ................................................................................................................................................ 10

4.1 General ............................................................................................................................................................. 10

4.2 Classification of climatic zones................................................................................................................ 10

4.3 Classification of main profiles according to the resistance to impact by falling mass ........ 11

4.4 Classification of main profiles according to the wall thickness of the external walls ......... 11

5 Requirements ................................................................................................................................................ 13

5.1 Material ............................................................................................................................................................ 13

5.1.1 UV resistant virgin material ..................................................................................................................... 13

5.1.2 Non-UV resistant virgin material ........................................................................................................... 13

5.1.3 Reprocessed, recycled materials and non-UV resistant virgin materials ............................... 13

5.2 Appearance ..................................................................................................................................................... 14

5.3 Dimensions and tolerances ...................................................................................................................... 14

5.3.1 General ............................................................................................................................................................. 14

5.3.2 Nominal shape ............................................................................................................................................... 14

5.3.3 Wall thickness of main profiles ............................................................................................................... 15

5.3.4 Tolerances on other dimensions ............................................................................................................ 15

5.3.5 Deviation from straightness of the main profiles ............................................................................. 15

5.4 Linear weight of the main profiles ......................................................................................................... 15

5.5 Heat reversion ............................................................................................................................................... 15

5.5.1 Main profile .................................................................................................................................................... 15

5.5.2 Auxiliary profiles .......................................................................................................................................... 15

5.6 Resistance to impact of main profiles by falling mass .................................................................... 15

5.7 Behaviour after heating at 150 °C .......................................................................................................... 15

5.8 Charpy impact resistance of main profile ........................................................................................... 15

5.9 Resistance to weathering .......................................................................................................................... 16

5.9.1 Exposure procedure .................................................................................................................................... 16

5.9.2 Impact strength after artificial weathering of main profiles ....................................................... 16

5.9.3 Colour fastness .............................................................................................................................................. 16

5.10 Strength of welded corners and T-joints of main profiles ............................................................. 17

5.10.1 Test method ................................................................................................................................................... 17

5.10.2 Tensile bending test .................................................................................................................................... 17

5.10.3 Compression bending test ........................................................................................................................ 17

6 Test methods ................................................................................................................................................. 17

6.1 Determination of the appearance .......................................................................................................... 17

6.2 Determination of dimensions .................................................................................................................. 17

6.2.1 Measuring devices ....................................................................................................................................... 17

6.2.2 Test specimen ................................................................................................................................................ 17

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SIST EN 12608-1:2016+A1:2020
EN 12608-1:2016+A1:2020 (E)

6.2.3 Conditioning ................................................................................................................................................... 17

6.2.4 Procedure ........................................................................................................................................................ 18

6.3 Determination of the linear weight of the profile ............................................................................. 18

6.3.1 Apparatus ........................................................................................................................................................ 18

6.3.2 Test specimen ................................................................................................................................................ 18

6.3.3 Conditioning ................................................................................................................................................... 18

6.3.4 Procedure ........................................................................................................................................................ 18

6.4 Determination of the thickness of a coextruded layer .................................................................... 18

6.5 Determination of colorimetric co-ordinates ...................................................................................... 18

6.6 Permissible tolerances on standard colours ...................................................................................... 19

7 !Traceability" ........................................................................................................................................ 19

7.1 !Main profiles ............................................................................................................................................ 19

7.2 Auxiliary profiles .......................................................................................................................................... 19

Annex A (normative) Material characteristics, preparation of samples and requirements ........... 21

A.1 General ............................................................................................................................................................. 21

A.2 Test specimens .............................................................................................................................................. 21

A.3 Preparation of pressed plates .................................................................................................................. 21

A.4 Material characteristics ............................................................................................................................. 21

A.4.1 Vicat softening temperature ..................................................................................................................... 21

A.4.2 Flexural modulus of elasticity .................................................................................................................. 22

A.4.3 Tensile impact strength .............................................................................................................................. 22

A.5 Test report ...................................................................................................................................................... 22

Annex B (normative) Calculation method for the determination of the radiant exposure

and exposure time to be used for artificial weathering.................................................................. 23

B.1 General ............................................................................................................................................................. 23

B.2 Calculation....................................................................................................................................................... 23

Annex C (informative) !Cross-sections of typical profiles ........................................................................ 26

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SIST EN 12608-1:2016+A1:2020
EN 12608-1:2016+A1:2020 (E)
European foreword

This document (EN 12608-1:2016+A1:2020) has been prepared by Technical Committee CEN/TC 249

“Plastics”, the secretariat of which is held by NBN.

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 February 2021, and conflicting national standards

shall be withdrawn at the latest by February 2021.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes !EN 12608:2016".
This document includes Amendment 1 approved by CEN on 15 June 2020.

The start and finish of text introduced or altered by amendment is indicated in the text by tags !".

!The major modifications between the previous edition EN 12608:2003 and the new edition EN

12608:2016 are:"

— Change in structure of definitions (general, profile, geometrical and material);

— Review of definitions of own reprocessed (previously reprocessable) material !(3.4.7)" and

external reprocessed (previously reprocessable) material !(3.4.8)";
— Including a new material (non-UV resistant virgin material);

— Review of Table 1, which defines the classification of climatic zones in Europe; (correction of a

mistake in EN 12608:2003);

— Addition of a class (no performance determined) for the classification of main profiles according to

the resistance to impact by falling mass (Table 2);

— Complete review of 5.1, giving the requirements for materials, establishing the distinction between

UV resistant virgin material (5.1.1), non UV-resistant virgin material (5.1.2) and reprocessed

(previously reprocessable), recycled (previously recyclable) materials and non-UV resistant virgin

materials (5.1.3) with the addition of Table 4 which defines the uses allowed according to the type

of material);

— Review of the test of Charpy impact resistance of main profiles (5.8); Introduction of dependence

on classes of wall thickness;
— Review of the methods to determine the colorimetric co-ordinates (6.5);

— Addition of new subclause 6.4 for the determination of the thickness of a co-extruded layer;

— Addition of a requirement for individual values for the Vicat softening temperature (A.4.1);

— Addition of a requirement for individual values for the flexural modulus of elasticity (A.4.2);

— Addition of a requirement for individual values for the tensile impact strength (A.4.3);

---------------------- Page: 6 ----------------------
SIST EN 12608-1:2016+A1:2020
EN 12608-1:2016+A1:2020 (E)

— Deletion of the Charpy impact resistance from Annex A (material characteristics);

— Editorial review of the whole document and updating of normative references.

EN 12608, Unplasticized poly(vinyl chloride) (PVC-U) profiles for the fabrication of windows and doors -

Classification, requirements and test methods consists of the following parts:
— Part 1: Non-coated PVC-U profiles with light coloured surfaces
— Parts 2: PVC-U profiles with laminated foils (in preparation)
— Parts 3: PVC-U profiles with coextruded coloured top-layer (in preparation)
— Parts 4: PVC-U profiles with lacquered-coating (in preparation)

According to the CEN-CENELEC Internal Regulations, the national standards organisations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,

Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of

North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the

United Kingdom.
---------------------- Page: 7 ----------------------
SIST EN 12608-1:2016+A1:2020
EN 12608-1:2016+A1:2020 (E)
1 Scope

This European Standard specifies the classifications, requirements and test methods for non-coated

unplasticized poly(vinyl chloride) (PVC-U) profiles with light coloured surfaces intended to be used for

the fabrication of windows and doors.

It is applicable to PVC-U profiles with the colorimetric co-ordinates measured on the visible surfaces, as

follows:
— L* ≥ 82 (chromaticity co-ordinate Y ≥ 60),
— –2,5 ≤ a* ≤ 5,
— –5 ≤ b* ≤ 15.

NOTE 1 For editorial reasons in this document the term "window" is used for window/door.

NOTE 2 Profiles made from PVC-U materials with reinforcements (e.g. glass fibres) are not part of this scope.

2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. For dated references, only the edition cited applies. For undated

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

!EN 477, Plastics — Poly(vinyl chloride) (PVC) based profiles — Determination of the resistance to

impact of profiles by falling mass

EN 478, Plastics — Poly(vinyl chloride) (PVC) based profiles — Determination of the appearance after

exposure at 150 °C

EN 479, Plastics — Poly(vinyl chloride) (PVC) based profiles — Determination of heat reversion

EN 513, Plastics — Poly(vinyl chloride) (PVC) based profiles — Determination of the resistance to artificial

weathering

EN 514, Plastics — Poly(vinyl chloride) (PVC) based profiles — Determination of the strength of welded

corners and T-joints"

EN ISO 105-A01:2010, Textiles - Tests for colour fastness - Part A01: General principles of testing (ISO

105-A01:2010)
EN ISO 178, Plastics - Determination of flexural properties (ISO 178)

EN ISO 179-1, Plastics - Determination of Charpy impact properties - Part 1: Non-instrumented impact

test (ISO 179-1)

EN ISO 306, Plastics - Thermoplastic materials - Determination of Vicat softening temperature (VST) (ISO

306)

!EN ISO 21306-2:2019, Plastics — Unplasticized poly(vinyl chloride) (PVC-U) moulding and extrusion

materials — Part 2: Preparation of test specimens and determination of properties (ISO 21306-2:2019)"

EN ISO 8256, Plastics - Determination of tensile-impact strength (ISO 8256)
---------------------- Page: 8 ----------------------
SIST EN 12608-1:2016+A1:2020
EN 12608-1:2016+A1:2020 (E)

EN ISO 11664-1, Colorimetry - Part 1: CIE standard colorimetric observers (ISO 11664-1)

EN ISO 11664-2, Colorimetry - Part 2: CIE standard illuminants (ISO 11664-2)
EN ISO 11664-4, Colorimetry - Part 4: CIE 1976 L*a*b* Colour space (ISO 11664-4)

EN 20105-A02, Textiles - Tests for colour fastness - Part A02: Grey scale for assessing change in colour

(ISO 105-A02)
ISO 18314-1, Analytical colorimetry — Part 1: Practical colour measurement
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 General
3.1.1
durability

ability of a profile to maintain satisfactory properties in a window over an estimated working life which

is at least the economically reasonable working life of the window installed in a building (works)

Note 1 to entry: The indications given on the working life of a product cannot be interpreted as a guarantee

given by the producer, but are regarded only as a means for choosing the right products in relation to the expected

economically reasonable working life of the works.
3.2 Profile definitions
3.2.1
profile
product produced by extrusion
3.2.2
non-coated profile
profile without any surface treatment and without non-PVC-U coextruded layer(s)
EXAMPLE Profiles without laminated foils or painted surfaces.
3.2.3
main profile
profile, which defines the structure of the window
3.2.4
auxiliary profile

profile intended to be used for the fabrication of a window which is not a main profile

Note 1 to entry: Main and auxiliary profiles can be different according to the window construction techniques in

the individual countries.
3.2.5
external wall (of a main profile)
wall of a main profile corresponding to its sight and non-sight surfaces
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SIST EN 12608-1:2016+A1:2020
EN 12608-1:2016+A1:2020 (E)
3.2.6
sight surface
surface of a profile exposed to view when the installed window is closed
Note 1 to entry: See Figure C.1 in Annex C."
!deleted text"
3.2.7
visible surface

any surface or parts of surface of a profile which can be exposed to UV radiation after installation of the

window, open or closed
3.2.8
coextruded profile

profile produced by using more than one extruder with different PVC-U materials according to 3.4 in

one production process without mixing them
3.3 Geometrical definitions
3.3.1
nominal profile shape
shape and dimensions of a profile, as specified by the manufacturer
3.3.2
deviation from straightness
deviation of the longitudinal axis of a profile from the straight line
3.3.3
depth (of a profile)

dimension, measured at right angles to the glazing plane, between the front and back face surfaces of a

profile
Note 1 to entry: See “d” in Figure 1."
3.3.4
overall width (of a profile)

largest dimension, measured in the direction of the glazing plane, perpendicular to the longitudinal axis

of a profile
Note 1 to entry: See “w” in Figure 1."
---------------------- Page: 10 ----------------------
SIST EN 12608-1:2016+A1:2020
EN 12608-1:2016+A1:2020 (E)
Key
d depth of a profile
w overall width of a profile
!Figure 1" — Cross-section of a typical profile
3.4 Material definitions
3.4.1
material

PVC-U compound in a form of granules or powder for the production of PVC-U profiles intended to be

used for the fabrication of a window
3.4.2
defined formulation
formulation which is a specified composition of polymer, additives and pigments
3.4.3
virgin material

material of a defined formulation, which has not been used or processed other than required for its

manufacture and to which no reprocessed or recycled material has been added
3.4.4
non-UV resistant virgin material
!NUVM"

material according to 3.4.3 but not necessarily satisfying the requirements of the resistance to

weathering
Note 1 to entry: See 5.9.
!3.4.5
UV resistant virgin material
UVM
virgin material which fulfils weathering resistance
3.4.6
reduced UV resistant virgin material
RUVM
virgin material which fulfils reduced weathering resistance"
---------------------- Page: 11 ----------------------
SIST EN 12608-1:2016+A1:2020
EN 12608-1:2016+A1:2020 (E)
!3.4.7"
own reprocessed material
!ORM"

material prepared from defined formulations, free of degradation, prepared from pre-consumer PVC-U

profiles in conformance with this part of EN 12608, including mis-measured/unused windows and off-

cuts, from window assembling manufacturers, that will be reprocessed by the same manufacturer from

which it was previously extruded

Note 1 to entry: Profiles produced with an own reprocessed material of the same formulation show the same

performance as those made of virgin material.
!3.4.8"
External reprocessed material
!3.4.8.1"
ERMa

material whose characteristics (excluding colour) are in conformance with this part of EN 12608,

prepared from pre-consumer PVC-U profiles including off-cuts, which has been originally produced by

other manufacturers than those carrying out the reprocessing
!3.4.8.2"
ERM

material prepared from pre-consumer PVC-U profiles, regardless of where they were originally

manufactured (e.g. glazing beads with PVC coextrusion/gaskets, coated profiles)
!3.4.9"
recycled material
!3.4.9.1"

material prepared from post-consumer PVC-U product, regardless of where they were originally

manufactured (e.g. glazing beads with PVC coextrusion/gaskets, coated profiles)
!3.4.9.2"
any material which is not defined in !3.4.3 to 3.4.9.1"
4 Classifications
4.1 General

In EN 12608-1 various aspects of performance are classified. The selection of appropriate classes

necessary to fulfil national requirements may be given in a national foreword of EN 12608-1.

4.2 Classification of climatic zones

For the purposes of this document, geographical Europe is divided in two climatic zones M (moderate

climate) and S (severe climate) as defined in Table 1. These climatic zones do not cover climates outside

of geographical Europe.
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SIST EN 12608-1:2016+A1:2020
EN 12608-1:2016+A1:2020 (E)
Table 1 — Classification of climatic zones in Europe
Class Moderate climate M Severe climate S
2 2
a < 5 GJ/m ≥ 5 GJ/m
Annual total solar radiant exposure on horizontal
surface
and or
Average temperature of the warmest month per year < 22 °C ≥ 22 °C

Values measured according the specifications of the World Meteorological Organisation (WMO).

!NOTE For the purpose of this document, “moderate climate” refers in general to warm and humid weathering

conditions and “severe climate” to hot and dry weathering conditions. The relevant moderate and severe test

methods for artificial weathering can be found in EN 513."

Profiles which are designed to be used in a severe climate (S) may also be used in a moderate climate

(M).

In those countries where the two climatic zones exists, care should be taken that profiles designed for a

moderate climate (M) are not used in the severe climate (S).

4.3 Classification of main profiles according to the resistance to impact by falling mass

For the resistance to impact by falling mass at –10 °C, the main profiles shall be classified according to

Table 2.

Table 2 — Classification of main profiles according to the resistance to impact by falling mass

Class 0 I II
Falling mass (g) NPD 1 000 1 000
Falling height (mm) NPD 1 000 1 500
NPD: No Performance Determined.

NOTE This property is assessed to ensure the extrusion process is carried out correctly.

It is recommended that class 0 is applied only when the profile geometry dictates that this test cannot

be performed.

4.4 Classification of main profiles according to the wall thickness of the external walls

!For the wall thickness of the external walls, the main profiles shall be classified according to Figure 2

and Table 3.

Figure 2 shows the areas of typical profiles where the wall thicknesses of external walls shall satisfy the

requirements given in Table 3."
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SIST EN 12608-1:2016+A1:2020
EN 12608-1:2016+A1:2020 (E)
Dimensions in millimetres

Figure 2 — Areas of three typical profiles with required wall thicknesses (and example

measurement methods)"
!Table 3 — Classification of main profiles according to wall thickness
Type of wall Class A Class B Class C
sight surface ≥ 2,8 mm ≥ 2,5 mm No requirement
non-sight surface ≥ 2,5 mm ≥ 2,0
...

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