Imperfections in thermoplastic welds - Classification

This document specifies a classification and a description of imperfections likely to be encountered in thermoplastic welded joints.
This document applies to the following welding processes:
-   heated tool welding;
-   electrofusion welding;
-   hot gas welding;
-   extrusion welding.
This document applies to the following group of materials:
-   PVC-C;
-   PVC-U including PVC-NI, PVC-RI, PVC-HI;
-   PP including PP-B, PP-H, PP-R;
-   PE;
-   PVDF;
-   ECTFE;
-   FEP;
-   PFA.
This document is not concerned with the search for the possible influence of these defects on the behaviour of joints in relation to the different types of stress to which the latter may be subjected or on method for preventing such defects.
It cannot therefore be used for the acceptance of welds which is defined in quality level standards (see [1]).
Only defects giving rise to discontinuities of materials or changes in shape are taken into consideration in this document, specifying their type, their shape and their positions, without however always indicating their origin or their causes.

Unregelmäßigkeiten an Schweißverbindungen von thermoplastischen Kunststoffen - Einteilung

Dieses Dokument legt eine Einteilung  und Beschreibung  von  Unregelmäßigkeiten,  die  in  Schweißverbindungen
von thermoplastischen Kunststoffen auftreten können, fest.
Dieses Dokument gilt für folgende Schweißverfahren:
-  Heizelementschweißen;
-  Heizwendelschweißen;
-  Warmgasschweißen;
- Extrusionsschweißen.
Es gilt für folgende Werkstoffgruppen:
- PVC-C;
- PVC-U einschließlich PVC-NI, PVC-RI und PVC-HI;
-  PP einschließlich PP-B, PP-H und PP-R;
- PE;
- PVDF;
- ECTFE;
- FEP;
- PFA.

Défauts dans les assemblages soudés en thermoplastiques - Classification

Le présent document spécifie une classification et une description des défauts susceptibles d�être rencontrés
dans les assemblages soudés en thermoplastiques.
Le présent document s�applique aux procédés de soudage suivants :
-  soudage par élément chauffant ;
-  soudage par électrofusion ;
-  soudage au gaz chaud ;
-  soudage par extrusion.
Le présent document s�applique aux groupes de matériaux suivants :
-  PVC-C ;
-  PVC-U, y compris PVC-NI, PVC-RI, PVC-HI ;
-  PP, y compris PP-B, PP-H, PP-R ;
-  PE ;
-  PVDF ;
-  ECTFE ;

Napake v plastomenih zvarih - Razvrstitev

General Information

Status
Withdrawn
Publication Date
03-May-2005
Withdrawal Date
19-Feb-2019
Current Stage
9960 - Withdrawal effective - Withdrawal
Completion Date
20-Feb-2019

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SLOVENSKI STANDARD
SIST EN 14728:2005
01-julij-2005
Napake v plastomenih zvarih - Razvrstitev
Imperfections in thermoplastic welds - Classification
Unregelmäßigkeiten an Schweißverbindungen von thermoplastischen Kunststoffen -
Einteilung
Défauts dans les assemblages soudés en thermoplastiques - Classification
Ta slovenski standard je istoveten z: EN 14728:2005
ICS:
25.160.40 Varjeni spoji in vari Welded joints
SIST EN 14728:2005 en

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

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SIST EN 14728:2005
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SIST EN 14728:2005
EUROPEAN STANDARD
EN 14728
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2005
ICS 25.160.40
English version
Imperfections in thermoplastic welds - Classification

Défauts dans les assemblages soudés en Unregelmäßigkeiten an Schweißverbindungen von

thermoplastiques - Classification thermoplastischen Kunststoffen - Einteilung
This European Standard was approved by CEN on 21 March 2005.

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 Central Secretariat 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 Central Secretariat has the same status as the official

versions.

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

Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,

Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels

© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14728:2005: E

worldwide for CEN national Members.
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SIST EN 14728:2005
EN 14728:2005 (E)
Contents Page

Foreword......................................................................................................................................................................3

1 Scope ..............................................................................................................................................................4

2 Normative references ....................................................................................................................................4

3 Symbols and designations ...........................................................................................................................5

4 Definition and classification of imperfections............................................................................................5

Annex A (normative) Explanations for characters 3, 4 and 5 according to prCR ISO/TR 17845.....................12

Bibliography ..............................................................................................................................................................14

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SIST EN 14728:2005
EN 14728:2005 (E)
Foreword

This document (EN 14728:2005) has been prepared by Technical Committee CEN/TC 249 “Plastics”, the

secretariat of which is held by IBN/BIN.

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 November 2005, and conflicting national standards shall be withdrawn at the latest

by November 2005.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following

countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark,

Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,

Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

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SIST EN 14728:2005
EN 14728:2005 (E)
1 Scope

This document specifies a classification and a description of imperfections likely to be encountered in thermoplastic

welded joints.
This document applies to the following welding processes:
 heated tool welding;
 electrofusion welding;
 hot gas welding;
 extrusion welding.
This document applies to the following group of materials:
 PVC-C;
 PVC-U including PVC-NI, PVC-RI, PVC-HI;
 PP including PP-B, PP-H, PP-R;
 PE;
 PVDF;
 ECTFE;
 FEP;
 PFA.

This document is not concerned with the search for the possible influence of these defects on the behaviour of

joints in relation to the different types of stress to which the latter may be subjected or on method for preventing

such defects.

It cannot therefore be used for the acceptance of welds which is defined in quality level standards (see [1]).

Only defects giving rise to discontinuities of materials or changes in shape are taken into consideration in this

document, specifying their type, their shape and their positions, without however always indicating their origin or

their causes.
2 Normative references

The following referenced documents are indispensable for the application 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.

CEN ISO/TS 17845, Welding and allied processes — Designation system for imperfections (ISO/TS 17845:2004)

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SIST EN 14728:2005
EN 14728:2005 (E)
3 Symbols and designations
The abbreviations used for thermoplastic materials are listed in Table 1.
Table 1 — Abbreviations used for thermoplastic materials
Abbreviation Thermoplastic material
PVC-C Polyvinyl chloride chlorinated
PVC-U Polyvinyl chloride unplasticized
PVC-NI Polyvinyl chloride normal impact
PVC-RI Polyvinyl chloride raised impact
PVC-HI Polyvinyl chloride high-impact
PP-B Polypropylene block copolymer
PP-H Polypropylene homopolymer
PP-R Polypropylene random copolymer
PE Polyethylene
PVDF Polyvinylidene fluoride
ECTFE Ethylene chlorotrifluoroethylene
FEP Fluorinated ethylene propylene
PFA Perfluoroalkoxy
4 Definition and classification of imperfections

The numbering system used for the classification of imperfections shall be as defined in CEN ISO/TS 17845.

The classification of imperfections for thermoplastic materials is given in Table 2.

Explanations for characters 3, 4 and 5 are given in Annex A.
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