EN 12814-8:2024
(Main)Testing of welded joints of thermoplastics semi-finished products - Part 8: Requirements
Testing of welded joints of thermoplastics semi-finished products - Part 8: Requirements
This document provides the requirements for the tests made on welded thermoplastics semi-finished products.
The selection of the appropriate test method(s) is made in accordance with the particular type and application of welded product.
The test results depend on the conditions of manufacture for the test specimen and on the test conditions. They can therefore only be related to the behaviour of the product or can only be used for designing a structure, if the test conditions can be related to the service conditions.
Prüfen von Schweißverbindungen aus thermoplastischen Kunststoffen - Teil 8: Anforderungen
In diesem Dokument werden Anforderungen an Prüfungen festgelegt, die an Schweißverbindungen aus thermoplastischen Kunststoffen durchgeführt werden.
Die Wahl des zweckmäßigen Prüfverfahrens wird entsprechend der jeweiligen Ausführung und Anwendung des geschweißten Produkts getroffen.
Die Prüfergebnisse sind von den Herstellbedingungen für die Probekörper und von den Prüfbedingungen abhängig. Sie können deshalb auf das Verhalten der Erzeugnisse oder für die Berechnung einer Konstruktion nur übertragbar sein, wenn die auftretenden Praxisbeanspruchungen den Prüfbedingungen entsprechen.
Essais des assemblages soudés sur produits semi-finis en thermoplastiques - Partie 8 : Exigences
Le présent document définit les exigences pour les essais réalisés sur les produits semi-finis soudés en thermoplastiques.
Le choix de la (des) méthode(s) d’essai appropriée(s) est fait conformément au type particulier et à l’application du produit soudé.
Les résultats des essais dépendent des conditions d’élaboration pour les éprouvettes et des conditions d’essai. Ils ne peuvent donc être liés qu'au comportement du produit ou ne peuvent être utilisés pour la conception d'une structure que si les conditions d'essai peuvent être liées aux conditions de service.
Preskušanje zvarjenih spojev plastomernih polizdelkov - 8. del: Zahteve
Ta dokument določa zahteve za preskuse varjenih plastomernih polizdelkov. Ustrezna preskusna metoda oziroma metode se izberejo v skladu z določeno vrsto in uporabo varjenega izdelka.
Rezultati preskusa so odvisni od pogojev izdelave za preskušanca in preskusnih pogojev. Zato jih je mogoče povezati z obnašanjem izdelka oziroma uporabiti za načrtovanje konstrukcije le, kadar obstaja povezava med preskusnimi pogoji in pogoji uporabe.
General Information
Relations
Overview
EN 12814-8:2024 (CEN) specifies the requirements for testing welded joints of thermoplastics semi-finished products. It sets pass/fail criteria and acceptance limits for destructive tests used to assess weld quality and mechanical behaviour of welded thermoplastic components. The standard applies to common materials such as PE, PP (block, homopolymer, random), PVC-U, PVC-C, PVDF and PA‑U (PA‑U 11 180 and PA‑U 12 180).
This part of EN 12814 defines how to interpret test outcomes (bend, tensile, creep, peel, low‑temperature, macroscopic and waisted tensile tests) so that test results can be related to service conditions and used for design, quality control and certification.
Key Topics and Requirements
- Scope and materials: Lists applicable thermoplastics and clarifies PA‑U designations.
- Referenced test methods: Directs users to EN 12814‑1 to EN 12814‑7 for specific test procedures (bend, tensile, tensile creep, peel, macroscopic exam, low‑temperature tensile, waisted tensile).
- Bend test: Minimum bend angles and ram displacement acceptance curves are provided per material and welding process (heated tool, extrusion, hot gas). Acceptance values are shown as figures for each material/process combination.
- Tensile requirements: Specifies minimum short‑term tensile welding factors (f_s) and long‑term tensile welding factors (f_l) for different welding processes; values vary by material and process and typically range from about 0.4 to 0.9 depending on service duration and method.
- Tensile creep and low‑temperature tests: Minimum long‑term and low‑temperature welding factors are required to demonstrate durability under sustained or cold service conditions.
- Peel and decohesion tests: For PE, brittle decohesion must not exceed 33% of the fusion zone; crush‑mode fracture in fusion plane must not exceed 33% of fusion zone length. Other material limits to be agreed between contracting parties where not specified.
- Macroscopic examination: Requirements are defined by relevant application standards.
- Fracture mode: For PE in waisted tensile tests, fracture must be ductile; other materials’ acceptance may be agreed contractually.
Applications and Users
This standard is essential for:
- Manufacturers and fabricators of welded thermoplastic pipes, fittings and semi‑finished products
- Test laboratories performing weld qualification and routine quality control
- Certification and conformity assessment bodies
- Design engineers and procurement specialists specifying welded thermoplastic assemblies
EN 12814-8:2024 helps ensure welded joints meet mechanical and durability expectations for intended service conditions.
Related Standards
- EN 12814‑1 to EN 12814‑7 (specific test methods referenced)
- This Part 8 supersedes EN 12814‑8:2021 and is part of the CEN EN 12814 series for welded thermoplastic joints.
Keywords: EN 12814-8:2024, testing of welded joints, thermoplastics, bend test, tensile test, tensile creep, peel test, welded thermoplastics standard, CEN.
Frequently Asked Questions
EN 12814-8:2024 is a standard published by the European Committee for Standardization (CEN). Its full title is "Testing of welded joints of thermoplastics semi-finished products - Part 8: Requirements". This standard covers: This document provides the requirements for the tests made on welded thermoplastics semi-finished products. The selection of the appropriate test method(s) is made in accordance with the particular type and application of welded product. The test results depend on the conditions of manufacture for the test specimen and on the test conditions. They can therefore only be related to the behaviour of the product or can only be used for designing a structure, if the test conditions can be related to the service conditions.
This document provides the requirements for the tests made on welded thermoplastics semi-finished products. The selection of the appropriate test method(s) is made in accordance with the particular type and application of welded product. The test results depend on the conditions of manufacture for the test specimen and on the test conditions. They can therefore only be related to the behaviour of the product or can only be used for designing a structure, if the test conditions can be related to the service conditions.
EN 12814-8:2024 is classified under the following ICS (International Classification for Standards) categories: 25.160.40 - Welded joints and welds. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 12814-8:2024 has the following relationships with other standards: It is inter standard links to EN 12814-8:2021. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase EN 12814-8:2024 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CEN standards.
Standards Content (Sample)
SLOVENSKI STANDARD
01-februar-2025
Preskušanje zvarjenih spojev plastomernih polizdelkov - 8. del: Zahteve
Testing of welded joints of thermoplastics semi-finished products - Part 8: Requirements
Prüfen von Schweißverbindungen aus thermoplastischen Kunststoffen - Teil 8:
Anforderungen
Essais des assemblages soudés sur produits semi-finis en thermoplastiques - Partie 8 :
Exigences
Ta slovenski standard je istoveten z: EN 12814-8:2024
ICS:
25.160.40 Varjeni spoji in vari Welded joints and welds
83.080.01 Polimerni materiali na Plastics in general
splošno
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 12814-8
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2024
EUROPÄISCHE NORM
ICS 25.160.40 Supersedes EN 12814-8:2021
English Version
Testing of welded joints of thermoplastics semi-finished
products - Part 8: Requirements
Essais des assemblages soudés sur produits semi-finis Prüfen von Schweißverbindungen aus
en thermoplastiques - Partie 8 : Exigences thermoplastischen Kunststoffen - Teil 8:
Anforderungen
This European Standard was approved by CEN on 27 October 2024.
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
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12814-8:2024 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms, definitions, symbols and abbreviations . 4
3.1 Terms and definitions . 4
3.2 Symbols and abbreviations . 4
4 Materials and properties . 5
5 Destructive test methods . 5
6 Requirements . 5
6.1 General . 5
6.2 Bend test . 5
6.2.1 Bend angle. 5
6.2.2 Displacement .13
6.3 Tensile test .19
6.4 Tensile creep test .20
6.5 Peel tests .20
6.6 Macroscopic examination .20
6.7 Low temperature tensile test .20
6.8 Tensile test with waisted test specimen .20
European foreword
This document (EN 12814-8:2024) 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 May 2025, and conflicting national standards shall be
withdrawn at the latest by May 2025.
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 12814-8:2021.
— bend angle data and ram displacement requirements as well as tensile requirements for PA-U have
been added.
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 provides the requirements for the tests made on welded thermoplastics semi-finished
products.
The selection of the appropriate test method(s) is made in accordance with the particular type and
application of welded product.
The test results depend on the conditions of manufacture for the test specimen and on the test conditions.
They can therefore only be related to the behaviour of the product or can only be used for designing a
structure, if the test conditions can be related to the service conditions.
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 12814-1, Testing of w
...
The standard EN 12814-8:2024 plays a crucial role in ensuring the reliability and performance of welded joints in thermoplastics semi-finished products. Its primary scope focuses on establishing comprehensive requirements for the testing processes involved in assessing these welded joints. By outlining specific test methods tailored to the variety of thermoplastic products and their intended applications, the standard enhances the ability of manufacturers and engineers to select the most suitable testing approach. One notable strength of this standard is its emphasis on the relationship between manufacturing conditions and test conditions, which highlights the significance of context in evaluating test results. The document recognizes that accurate assessments of welded joint performance can only be made when the test conditions align with the actual service conditions anticipated in real-world applications. This aspect is particularly relevant for industries that rely on the integrity of thermoplastic materials in structural applications, as it underscores the need for rigorous testing protocols to ensure safety and performance. Moreover, EN 12814-8:2024 addresses the variability and complexity associated with thermoplastic welding, providing a structured framework that aids stakeholders, including engineers and quality assurance professionals, in understanding the nuances of testing procedures. This ensures that test outcomes are not only applicable but also relevant for effective design and maintenance strategies. Overall, the requirements set forth in the standard establish a robust foundation for testing welded joints of thermoplastics, making EN 12814-8:2024 a vital reference for ensuring quality and reliability in thermoplastic applications. Its comprehensive approach reaffirms the importance of standards in advancing industry practices and enhancing product performance in various applications.
SIST EN 12814-8:2025は、熱可塑性半製品の溶接接合部の試験に関する規格であり、その内容は非常に重要です。このドキュメントでは、溶接された熱可塑性半製品に対する試験の要件を明確に示しています。規格の範囲は、さまざまな製品の種類と適用に応じた適切な試験方法の選定をカバーしており、製品の品質を保証するための基盤を提供しています。 この標準の強みは、試験結果が製品の製造条件および試験条件に依存することを明示している点にあります。これにより、設計者やエンジニアは、試験条件が使用条件に関連付けられる場合に限り、試験結果を信頼性のあるものとして活用できることが強調されています。このアプローチは、特に製品が使用される環境を考慮する際に重要であり、製品性能への直接的な影響を評価するための指針となります。 規格は、熱可塑性材料の接合技術における安全性と信頼性を確保する上で不可欠な要素であり、建設や製造業などの分野での適用が期待されています。これにより、業界全体で均一な品質基準を持つことが可能となり、製品の寿命や動作の信頼性を向上させる助けとなるでしょう。この標準の重要性は、品質管理や工程改善のためのツールとしても機能する点で、熱可塑性製品の市場において益々重要な役割を果たすことが予想されます。
SIST EN 12814-8:2025 문서는 열가소성 반제품의 용접 접합부 테스트에 관한 요구 사항을 명확히 제시하고 있다. 이 표준의 범위는 용접된 열가소성 반제품에 대한 테스트 요구 사항을 제공하며, 특정 유형 및 적용에 따라 적절한 테스트 방법의 선택이 이루어진다. 이는 다양한 열가소성 반제품의 품질과 신뢰성을 확보하기 위한 중대한 요소로, 제조업체가 제품의 성능을 평가하는 데 있어 필수적인 기준이 된다. 이 표준은 테스트 결과가 테스트 샘플의 제조 조건과 테스트 조건에 따라 달라질 수 있음을 강조한다. 이는 열가소성 제품의 행동을 이해하거나 구조 설계를 위한 자료로 사용할 수 있도록 돕는다. 특히, 테스트 조건이 서비스 조건과 연관될 수 있는 경우에만 결과가 의미 있는 정보를 제공할 수 있다는 점에서, 표준의 적용성과 중요성이 더욱 부각된다. SIST EN 12814-8:2025 문서는 열가소성 반제품의 용접 접합부 테스트에 대한 신뢰할 수 있는 기준을 제공함으로써, 품질 관리 및 구조적 안전성을 보장하는 데 필수적인 역할을 수행한다. 이러한 요구 사항은 제조업체가 제품의 설계 및 적합성을 검토하는 데 있어 실질적인 지침을 제공하며, 따라서 이 표준은 산업 전반에 걸쳐 중요한 참고자료로 자리 잡고 있다.
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