SIST EN 513:2026

• Abstract:

  This document specifies a method for exposing specimens made from poly(vinyl chloride) (PVC) based profiles to xenon-arc radiation, in order to assess changes in characteristics.; It is applicable to PVC based profiles including those covered with foil, paint, print, thermo-laminated foils or coextruded.; NOTE The determination of changes in colour and variations of properties after exposure of PVC based profiles to xenon-arc radiation is described in an informative Annex A.

• Status: Published
• Public Enquiry End Date: 09-Jul-2025
• Publication Date: 20-Aug-2026
• ICS: 83.140.99 - Other rubber and plastics products
• Technical Committee: IPMA - Polimer materials and products
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 13-Aug-2026
• Due Date: 18-Oct-2026
• Completion Date: 21-Aug-2026
• Ref Project: EN 513:2026 - Plastics - Poly(vinyl chloride) (PVC) based profiles - Determination of the resistance to artificial weathering

• Refers: SIST EN ISO 4892-2:2013 - Plastics - Methods of exposure to laboratory light sources - Part 2: Xenon-arc lamps (ISO 4892-2:2013)
• Effective Date: 02-Sep-2026
• Referred By: SIST EN 14471:2006 - Chimneys - System chimneys with plastic flue liners - Requirements and test methods
• Effective Date: 12-Aug-2026
• Referred By: SIST EN 89:2015 - Gas-fired storage water heaters for the production of domestic hot water
• Effective Date: 12-Aug-2026
• Referred By: SIST EN 12608:2003 - Unplasticized polyvinylchloride (PVC-U) profiles for the fabrication of windows and doors - Classification, requirements and test methods
• Effective Date: 12-Aug-2026
• Referred By: SIST EN 12608-1:2016 - 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
• Effective Date: 12-Aug-2026
• Referred By: SIST EN 607:2023 - Eaves gutters and fittings made of PVC-U - Definitions, requirements and testing
• Effective Date: 12-Aug-2026
• Referred By: SIST EN 607:2005 - Eaves gutters and fittings made of PVC-U - Definitions, requirements and testing
• Effective Date: 12-Aug-2026
• Referred By: SIST EN 26:2015 - Gas-fired instantaneous water heaters for the production of domestic hot water
• Effective Date: 12-Aug-2026
• Referred By: SIST EN 13245-1:2026 - Plastics - Unplasticized poly(vinyl chloride) (PVC-U) profiles for building applications - Part 1: Designation of PVC-U profiles
• Effective Date: 12-Aug-2026
• Referred By: SIST EN 13245-3:2026 - Plastics - Unplasticized poly(vinyl chloride) (PVC-U) profiles for building applications - Part 3: Designation of PVC-UE profiles
• Effective Date: 12-Aug-2026
• Referred By: SIST EN 12608-2:2023 - Unplasticized poly(vinyl chloride) (PVC-U) profiles for the fabrication of windows and doors - Classification, requirements and test methods - Part 2: PVC-U profiles covered with foils bonded with adhesives
• Effective Date: 12-Aug-2026
• Referred By: SIST EN 12608-1:2016+A1:2020 - 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
• Effective Date: 12-Aug-2026
• Revises: SIST EN 513:2019 - Plastics - Poly(vinyl chloride) (PVC) based profiles - Determination of the resistance to artificial weathering
• Effective Date: 11-Dec-2024

SIST EN 513:2026 is the Slovenian national standard identical to EN 513:2026, published by SIST. It specifies a xenon-arc artificial weathering method for PVC-based profiles to assess changes in characteristics after exposure. The standard is used for profiles including foil-covered, painted, printed, thermo-laminated and coextruded products, and it is aimed at manufacturers, test laboratories and quality teams who need a repeatable weathering check.

What does SIST EN 513:2026 specify?

SIST EN 513:2026 specifies how to expose specimens taken from poly(vinyl chloride) (PVC) based profiles to xenon-arc radiation and then assess changes after exposure. It applies to profiles with surface finishes such as foil, paint, print, thermo-laminated foil and coextrusion.

The document is organized into clauses for scope, references, terms and definitions, symbols, principle, apparatus, test specimens, conditioning, weathering test conditions, procedure and test report. It also includes one informative annex.

Annex	What it covers
Annex A	Determination of changes in colour and variations of properties after exposure to xenon-arc radiation

What are the key requirements of SIST EN 513:2026?

SIST EN 513:2026 requires exposure of specimens to xenon-arc radiation under controlled irradiance, temperature, humidity and spray cycling. In practice, this means the weathering step is tightly controlled so results can be compared between laboratories.

Exposure setup and apparatus

The apparatus must comply with EN ISO 4892-1 and EN ISO 4892-2. Clause 6 calls for a xenon-arc lamp using method A, black-standard and white-standard thermometers, a device for measuring radiant exposure, and open-frame specimen holders that leave the back of the specimen exposed. This matters because the lamp, filtering and specimen mounting all affect how the sample ages.

Test conditions

Clause 9 defines two weathering methods:

• method 1 for moderate climate (M)
• method 2 for severe climate (S)

The choice of method is given in EN 12608-1:2026, Annex B. The clause also sets the dry and spray cycle structure, together with the target irradiance, relative humidity and BST/WST temperature ranges. In practice, the selected method should match the intended outdoor severity of use.

Specimens and preparation

Clause 7 requires specimens to come from the surface of the profile exposed to UV radiation, with the longitudinal direction aligned to the profile. The non-exposed reference specimens must be stored in the dark. Clause 8 says conditioning is normally not required before exposure unless the referring standard says otherwise.

Exposure procedure and records

Clause 10 requires the specimens to be placed in the holders, the apparatus to be operating at the required conditions before exposure starts, and the surfaces to face the xenon-arc lamps. During exposure, the air temperature, BST temperature and irradiance are recorded, while WST is monitored. When the specified radiant exposure is reached, exposure stops and specimens are removed without cleaning unless the referring standard allows it.

Test report

Clause 11 lists what the report must state, including the standard reference, exposure method, sample identification, test period, cleaning method if used, apparatus details, specimen holder type, temperature settings, humidity, air temperature, cycle used, radiant exposure, exposure time and any operating incidents. This is important for traceability and for comparing results from different tests.

Annex A evaluations

Informative Annex A gives practical methods for follow-up checks after weathering. It covers colour change, grey-scale assessment, colorimetric coordinates, and property checks such as Charpy impact strength, tensile impact, flexural properties, chalking, coating adhesion, peel strength and falling weight impact resistance for PVC UE profiles.

What terms does SIST EN 513:2026 define?

• Radiant exposure - the time integral of irradiance, measured in joules per square metre (J/m²).
• PVC-U - unplasticized poly(vinyl chloride).
• PVC-UE - expanded unplasticized poly(vinyl chloride).
• BST - black-standard thermometer used to monitor specimen heating.
• WST - white-standard thermometer used to monitor specimen heating.

Who uses SIST EN 513:2026?

SIST EN 513:2026 is used by producers of PVC-based profiles, especially for outdoor applications. It is also used by testing laboratories, quality assurance teams and technical buyers who need to check whether a profile formulation, coating or surface finish withstands artificial weathering.

In practice, users apply it to window and door profiles, laminated profiles and other PVC-based products where long-term appearance or property retention matters after UV exposure.

What changed in SIST EN 513:2026 from the previous edition?

SIST EN 513:2026 supersedes EN 513:2018. The foreword states these significant changes:

• the test report now includes the type of specimen holder, backed or open framed
• an alternative colour measurement method using EN ISO/CIE 11664-6 and CIEDE2000 was added for uniform colours in Annex A.2.3
• references were updated

Which standards are used with SIST EN 513:2026?

SIST EN 513:2026 uses EN ISO 472 for plastics vocabulary, EN ISO 4892-1:2024 for general laboratory light-exposure requirements, EN ISO 4892-2:2013 for xenon-arc lamps and method A, and ISO 9370:2017 for radiant exposure measurement.

For method selection and related product requirements, it also points to EN 12608-1:2026. Annex A relies on further standards for colour assessment and property checks, including ISO 4582, EN 20105-A02, EN ISO 105-A03, EN ISO/CIE 11664 series, EN ISO 179-1, EN ISO 8256:2023, EN ISO 178, EN ISO 4628-6, EN ISO 2409, EN 17271 and EN 13245-2:2008.

What does the SIST EN 513:2026 document contain?

The document contains the xenon-arc exposure method, the required apparatus, specimen placement rules, and the two weathering cycles for moderate and severe climate. It also includes a test-report checklist that captures the apparatus settings and exposure history.

Annex A provides practical follow-up methods for colour change and property change evaluation after weathering. It includes visual colour comparison, instrumental colour measurement, and references for impact, flexural, chalking, adhesion, peel and falling-weight tests used to judge how the profiles changed after exposure.

SLOVENSKI STANDARD
01-oktober-2026
Polimerni materiali - Profili na osnovi polivinilklorida (PVC) - Ugotavljanje
odpornosti proti vremenskim vplivom s pospešenim staranjem
Plastics - Poly(vinyl chloride) (PVC) based profiles - Determination of the resistance to
artificial weathering
Kunststoffe - Profile auf Basis von Polyvinylchlorid (PVC) - Bestimmung der
Beständigkeit gegenüber künstlicher Bewitterung
Plastiques - Profilés à base de poly(chlorure de vinyle) (PVC) - Détermination de la
résistance au vieillissement artificiel
Ta slovenski standard je istoveten z: EN 513:2026
ICS:
83.140.99 Drugi izdelki iz gume in Other rubber and plastics
polimernih materialov products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 513
EUROPEAN STANDARD
NORME EUROPÉENNE
August 2026
EUROPÄISCHE NORM
ICS 83.140.99 Supersedes EN 513:2018
English Version
Plastics - Poly(vinyl chloride) (PVC) based profiles -
Determination of the resistance to artificial weathering
Plastiques - Profilés à base de poly(chlorure de vinyle) Kunststoffe - Profile auf Basis von Polyvinylchlorid
(PVC) - Détermination de la résistance au (PVC) - Bestimmung der Beständigkeit gegenüber
vieillissement artificiel künstlicher Bewitterung
This European Standard was approved by CEN on 5 July 2026.

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, Türkiye 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
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 513:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Symbols and abbreviations . 4
5 Principle . 5
6 Apparatus . 5
7 Test specimens . 5
8 Conditioning . 5
9 Weathering test conditions . 6
10 Procedure. 8
11 Test report . 8
Annex A (informative) Determination of changes in colour and variations of properties after
exposure to xenon-arc radiation . 10
A.1 General . 10
A.2 Determination of visual change in colour . 10
A.2.1 Test specimens . 10
A.2.2 Grey scale . 10
A.2.3 Determination of colorimetric coordinates . 10
A.3 Determination of Charpy impact strength . 11
A.3.1 PVC-U profiles . 11
A.3.2 PVC-UE profiles . 11
A.4 Determination of the tensile impact . 12
A.5 Determination of flexural properties . 12
A.6 Determination of chalking . 12
A.7 Determination of adhesion of a coating . 12
A.8 Determination of peel strength . 12
A.9 Determination of falling weight impact resistance (only applicable for PVC UE
profiles) . 13
Bibliography . 14

European foreword
This document (EN 513:2026) has been prepared by Technical Committee CEN/TC 249 “Plastics”, the
secretariat of which is held by SIS.
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 2026, and conflicting national standards shall
be withdrawn at the latest by February 2026.
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 513:2018.
This document includes the following significant technical changes with respect to EN 513:2018:
— the type of specimen holder (backed or open framed) has been added to the test report;
— the colour measurement according to EN ISO/CIE 11664-6, calculating the CIEDE2000, has been
added as an alternative method for determining the colorimetric coordinates (for uniform colours
only) in A.2.3;
— references have been updated.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
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, Türkiye and the United
Kingdom.
1 Scope
This document specifies a method for exposing specimens made from poly(vinyl chloride) (PVC) based
profiles to xenon-arc radiation, in order to assess changes in characteristics.
It is applicable to PVC based profiles including those covered with foil, paint, print, thermo-laminated
foils or coextruded.
NOTE The determination of changes in colour and variations of properties after exposure of PVC based profiles
to xenon-arc radiation is described in an informative Annex A.
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 ISO 472, Plastics — Vocabulary (ISO 472)
EN ISO 4892-1:2024, Plastics — Methods of exposure to laboratory light sources — Part 1: General
guidance and requirements (ISO 4892-1:2024)
EN ISO 4892-2:2013, Plastics — Methods of exposure to laboratory light sources — Part 2: Xenon-arc lamps
(ISO 4892-2:2013)
ISO 9370:2017, Plastics — Instrumental determination of radiant exposure in weathering tests — General
guidance and basic test method
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN ISO 472 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
3.1
radiant exposure
H
time integral of irradiance
Note 1 to entry: measured in joules per square metre (J/m ).
[SOURCE: ISO 9370:2017, 3.27]
4 Symbols and abbreviations
For the purposes of this document, the following symbols and abbreviations apply.
PVC-U unplasticized poly(vinyl chloride)
PVC-UE expanded unplasticized poly(vinyl chloride)
BST black-standard thermometer
WST white-standard thermometer
5 Principle
Specimens taken from the surface of a profile, subjected to weathering in practice, shall be exposed to
xenon-arc radiation under specified conditions of irradiance, black and white standard temperatures,
relative humidity and spray cycle.
After the exposure, the changes in characteristics of the specimens are determined.
6 Apparatus
The apparatus shall comply with EN ISO 4892-1 and EN ISO 4892-2 and shall include:
a) a xenon-arc lamp in accordance with method A of EN ISO 4892-2:2013 with a spectral irradiance in
the band pass of 300 nm to 800 nm of (550 ± 55) W/m or a spectral irradiance in the band pass of
2 2
300 nm to 400 nm of (60 ± 2) W/m or a spectral irradiance at 340 nm of (0,51 ± 0,02) W/(m nm).
NOTE 1 In apparatuses with rotating specimen holders, the UV/(UV+VIS) irradiance ratio depends strongly
on the wavelength-dependent reflection behaviour of the specimens in the test chamber. This ratio is not
constant and varies with the reflective properties of the specimens.
NOTE 2 When comparing apparatuses controlled at different wavelength ranges, higher tolerances may be
accepted due to the conversion. Typical range is (550 ± 120) W/m for spectral irradiance in the band pass of
2 2
300 nm to 800 nm, (60 ± 12) W/m for the band pass of 300 nm to 400 nm and (0,51 ± 0,08) W/(m nm) for
spectral irradiance at 340 nm.
b) a black-standard thermometer (BST) in accordance with EN ISO 4892-1:2024, 5.2, and
EN ISO 4892-2:2013, 6.2.1, and a means of recording temperatures during one cycle;
c) a white-standard thermometer (WST) in accordance with EN ISO 4892-1:2024, 5.2, and
EN ISO 4892-2:2013, 6.2.1, and a means of recording temperatures during one cycle;
d) a device to determine the radiant exposures stated in a) according to ISO 9370;
e) specimen holders in the form of an open frame, leaving the back of the specimen exposed according
to EN ISO 4892-2:2013, 4.6.
7 Test specimens
The number of test specimens shall be as specified in the referring standard.
NOTE Additional details regarding test specimens for determining changes in colour and variations of
properties after exposure of PVC based profiles to xenon-arc radiation are given in Annex A.
The test specimens shall be taken from the surface of the profile exposed to UV radiation, ensuring that
the longitudinal direction of the test specimens corresponds to that of the profile.
The non-exposed reference test specimens shall be stored in the dark.
8 Conditioning
Unless otherwise specified, conditioning is not required before an exposure to laboratory radiation
sources.
NOTE Additional details regarding conditioning before determining changes in colour and variations of
properties after exposure of PVC based profiles to xenon-arc radiation are given in Annex A.
9 Weathering test conditions
Two different weathering test conditions of exposure are specified:
— method 1 for moderate clima
...