SIST EN 1971-1:2020
(Main)Copper and copper alloys - Eddy current test for measuring defects on seamless round copper and copper alloy tubes - Part 1: Test with an encircling test coil on the outer surface
Copper and copper alloys - Eddy current test for measuring defects on seamless round copper and copper alloy tubes - Part 1: Test with an encircling test coil on the outer surface
This document specifies a procedure for the eddy current test with an encircling test coil for measuring defects on the outer surface of seamless round copper and copper alloy tubes.
NOTE The eddy current test method(s) required, together with the size range and acceptance level, are defined in the relevant product standard.
The choice of the method for eddy current test:
- with an encircling test coil on the outer surface according to prEN 1971-1;
or
- with an internal probe on the inner surface according to prEN 1971-2;
is at the discretion of the manufacturer if there are no other agreements between the purchaser and the supplier.
Kupfer und Kupferlegierungen - Wirbelstromprüfung an Rohren zur Messung von Fehlern an nahtlos gezogenen runden Rohren aus Kupfer und Kupferlegierungen - Teil 1: Prüfung mit umfassender Spule auf der Außenseite
Dieses Dokument legt ein Verfahren für die Wirbelstromprüfung mit umfassender Prüfspule zur Messung von Fehlern auf der Außenseite von nahtlosen Rundrohren aus Kupfer und Kupferlegierungen fest.
ANMERKUNG Das (Die) geforderte(n) Wirbelstromprüfverfahren sowie der Maßbereich und die Sortiergrenze sind in der entsprechenden Produktnorm festgelegt.
Die Wahl des Verfahrens für die Wirbelstromprüfung mit
- umfassender Spule auf der Außenseite nach EN 1971-1
oder
- Innensonde auf der Innenseite nach EN 1971-2
obliegt dem Hersteller, wenn keine anderen Vereinbarungen zwischen Hersteller und Lieferer getroffen wurden.
Cuivre et alliages de cuivre - Méthode de contrôle par courants de Foucault pour le mesurage des défauts des tubes ronds sans soudure en cuivre et alliages de cuivre - Partie 1 : Essai avec une bobine encerclante sur la paroi externe
Le présent document spécifie un mode opératoire relatif au contrôle par courants de Foucault pour le mesurage des défauts présents sur la paroi externe des tubes ronds sans soudure en cuivre et alliages de cuivre, au moyen d’une bobine encerclante.
NOTE La ou les méthodes de contrôle par courants de Foucault requises, ainsi que les gammes de dimensions concernées et le niveau d'acceptation, sont spécifiés dans la norme de produit correspondante.
Le choix de la méthode de contrôle par courants de Foucault :
- avec une bobine encerclante sur la paroi externe selon le prEN 1971-1 ;
ou
- avec un capteur interne sur la paroi interne selon le prEN 1971-2 ;
est laissé à la discrétion du fabricant, sauf accord contraire entre le client et le fournisseur.
Baker in bakrove zlitine - Metoda preskušanja z vrtinčnimi tokovi za merjenje napak na nevarjenih okroglih ceveh iz bakra in bakrovih zlitin - 1. del: Preskus s preskusno tuljavo, ki obdaja zunanjo površino
Ta dokument določa postopek za metodo preskušanja z vrtinčnimi tokovi s preskusno tuljavo za merjenje napak na zunanji površini nevarjenih okroglih cevi iz bakra in bakrovih zlitin.
OPOMBA: Zahtevane metode preskušanja z vrtinčnimi tokovi ter razpon velikosti in meja sprejemljivosti so določeni v ustreznem standardu za izdelek.
Metodo za preskušanje z vrtinčnimi tokovi:
– s preskusno tuljavo, ki obdaja zunanjo površino, v skladu s standardom prEN 1971-1; ali
– z notranjo tuljavo ob notranji površini v skladu s standardom prEN 1971-2;
izbere proizvajalec, če ne obstaja drugačen dogovor med kupcem in dobaviteljem.
General Information
Relations
Overview
EN 1971-1:2019 (CEN) specifies a standardized procedure for an eddy current test with an encircling test coil to measure defects on the outer surface of seamless round copper and copper‑alloy tubes. The method is a non‑destructive testing (NDT) technique intended to detect potential leaks, material inhomogeneities and surface or near‑surface discontinuities during production. The choice between this outer‑surface encircling coil method (EN 1971-1) and an internal probe method (EN 1971-2) is normally at the manufacturer’s discretion unless otherwise agreed with the purchaser.
Key topics and requirements
- Scope: Targets seamless round copper and copper‑alloy tubes; product standards define size ranges and acceptance levels.
- Personnel: Operators must be trained; qualifications can be certified according to EN ISO 9712 when agreed.
- Equipment & operation:
- Drive mechanism must feed tubes through the coil concentrically and vibration‑free.
- Test sensitivity variation due to speed/position must be kept within ±2 dB.
- Probe distance from the tube surface should be minimized for adequate sensitivity.
- Typical coil excitation frequencies are in the range 1 kHz to 125 kHz.
- Reference standard tube:
- A defect‑free tube of the same dimensions is used for instrument adjustment.
- Reference tubes may include one or three calibrated holes (three at 120° or one rotated three times) as signal references.
- Dynamic conditions (line speed) must be accounted for in reference tests.
- Acceptance criteria:
- The sorting limit (rejection threshold) is based on the smallest of the reference signals.
- The standard allows for a secondary lower detection threshold for non‑local discontinuities; manufacturers determine related parameters and allowable defect density per product standard.
- Instrument adjustment & monitoring:
- Systems are adjusted with the reference tube and checked for each product change and at intervals not exceeding 8 hours.
- A sensitivity loss > 2 dB invalidates tubes tested since the last check.
Applications and who uses it
- Tube manufacturers and production quality teams for inline inspection of copper and copper‑alloy tubing.
- NDT technicians and inspection service providers implementing eddy current testing.
- Buyers, purchasers and quality assurance managers who specify acceptance criteria in product contracts.
- Equipment suppliers designing encircling‑coil eddy current systems or calibration references.
Related standards
- EN 1971-2 - internal probe (inner‑surface) eddy current testing for similar tubes.
- EN ISO 9712 - qualification and certification of NDT personnel.
- EN ISO 12718 - eddy current testing vocabulary.
Keywords: EN 1971-1:2019, eddy current test, encircling test coil, copper and copper alloys, seamless round tubes, NDT, acceptance criteria, reference standard tube, instrument adjustment.
Frequently Asked Questions
SIST EN 1971-1:2020 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Copper and copper alloys - Eddy current test for measuring defects on seamless round copper and copper alloy tubes - Part 1: Test with an encircling test coil on the outer surface". This standard covers: This document specifies a procedure for the eddy current test with an encircling test coil for measuring defects on the outer surface of seamless round copper and copper alloy tubes. NOTE The eddy current test method(s) required, together with the size range and acceptance level, are defined in the relevant product standard. The choice of the method for eddy current test: - with an encircling test coil on the outer surface according to prEN 1971-1; or - with an internal probe on the inner surface according to prEN 1971-2; is at the discretion of the manufacturer if there are no other agreements between the purchaser and the supplier.
This document specifies a procedure for the eddy current test with an encircling test coil for measuring defects on the outer surface of seamless round copper and copper alloy tubes. NOTE The eddy current test method(s) required, together with the size range and acceptance level, are defined in the relevant product standard. The choice of the method for eddy current test: - with an encircling test coil on the outer surface according to prEN 1971-1; or - with an internal probe on the inner surface according to prEN 1971-2; is at the discretion of the manufacturer if there are no other agreements between the purchaser and the supplier.
SIST EN 1971-1:2020 is classified under the following ICS (International Classification for Standards) categories: 23.040.15 - Non-ferrous metal pipes; 77.150.30 - Copper products. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 1971-1:2020 has the following relationships with other standards: It is inter standard links to SIST EN 1971-1:2012. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase SIST EN 1971-1:2020 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 SIST standards.
Standards Content (Sample)
SLOVENSKI STANDARD
01-januar-2020
Nadomešča:
SIST EN 1971-1:2012
Baker in bakrove zlitine - Metoda preskušanja z vrtinčnimi tokovi za merjenje
napak na nevarjenih okroglih ceveh iz bakra in bakrovih zlitin - 1. del: Preskus s
preskusno tuljavo, ki obdaja zunanjo površino
Copper and copper alloys - Eddy current test for measuring defects on seamless round
copper and copper alloy tubes - Part 1: Test with an encircling test coil on the outer
surface
Kupfer und Kupferlegierungen - Wirbelstromprüfung an Rohren zur Messung von
Fehlern an nahtlos gezogenen runden Rohren aus Kupfer und Kupferlegierungen - Teil
1: Prüfung mit umfassender Spule auf der Außenseite
Cuivre et alliages de cuivre - Méthode de contrôle par courants de Foucault pour le
mesurage des défauts des tubes ronds sans soudure en cuivre et alliages de cuivre -
Partie 1 : Essai avec une bobine encerclante sur la paroi externe
Ta slovenski standard je istoveten z: EN 1971-1:2019
ICS:
23.040.15 Cevi iz neželeznih kovin Non-ferrous metal pipes
77.150.30 Bakreni izdelki Copper products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 1971-1
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2019
EUROPÄISCHE NORM
ICS 23.040.15; 77.150.30 Supersedes EN 1971-1:2011
English Version
Copper and copper alloys - Eddy current test for
measuring defects on seamless round copper and copper
alloy tubes - Part 1: Test with an encircling test coil on the
outer surface
Cuivre et alliages de cuivre - Méthode de contrôle par Kupfer und Kupferlegierungen - Wirbelstromprüfung
courants de Foucault pour le mesurage des défauts des an Rohren zur Messung von Fehlern an nahtlos
tubes ronds sans soudure en cuivre et alliages de gezogenen runden Rohren aus Kupfer und
cuivre - Partie 1 : Essai avec une bobine encerclante Kupferlegierungen - Teil 1: Prüfung mit umfassender
sur la paroi externe Spule auf der Außenseite
This European Standard was approved by CEN on 4 September 2019.
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
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1971-1:2019 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 General requirements . 5
4.1 Personnel qualification . 5
4.2 Condition of tube to be tested . 5
4.3 Equipment . 6
5 Reference standard tube . 7
6 Acceptance criteria . 8
6.1 Detection of local discontinuities by encircling coils systems . 8
6.2 Detection of non-local discontinuities by encircling coils systems with lower
detection levels . 8
6.3 Other test methods . 9
7 Instrument adjustment . 9
Bibliography . 10
European foreword
This document (EN 1971-1:2019) has been prepared by Technical Committee CEN/TC 133 “Copper and
copper alloys”, the secretariat of which is held by DIN.
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 2020, and conflicting national standards shall be
withdrawn at the latest by May 2020.
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 1971-1:2011.
The following modifications were implemented in this new edition of EN 1971-1:
— updated normative references.
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.
Introduction
The eddy current test described in this document has the objective of detecting during production
potential leaks and serious defects in seamless round copper and copper alloy tubes.
The eddy current test is able to detect material inhomogeneities and their positions throughout the
length of tubes. The eddy current signals of material inhomogeneities are compared with reference
signals of artificially produced test defects. It is possible to identify these inhomogeneities on the inner
and outer surfaces as well as within the tube wall.
Since the distribution of eddy currents decreases as the distance from the test coil increases, the
amplitude of defect signals also decreases with increasing distance from the test coil. Thus the eddy
current test with encircling test coil on the outer surface is less sensitive to defects on the inner surface.
The purpose of this European Standard is not to define a method of measuring the actual extent of the
material inhomogeneities as the signal amplitude is dependent on, amongst other factors, volume, form
and position of the inhomogeneity.
Due to end effects, it is not possible to effectively test the ends of the tubes. The purchaser and the
supplier could agree that the end effect may be overcome by cutting to length after testing.
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