SIST EN 13100-4:2014

Non destructive testing of welded joints of thermoplastics semifinished products - Part 4: High voltage testing

This European Standard specifies the equipment and methods for the high voltage testing of butt or overlap welded joints in thermoplastic sheets for locating through-thickness defects only. It applies to new unused constructions only.

Zerstörungsfreie Prüfung von Schweißverbindungen thermoplastischer Kunststoffe - Teil 4: Hochspannungsprüfung

Diese Europäische Norm legt die lediglich zur Lokalisierung von Fehlstellen in Dickenrichtung anzuwendenden Prüfgeräte und -verfahren für die Hochspannungsprüfung von Stumpf- oder Überlapp(schweiß)nähten in thermoplastischen Kunststoffplatten fest. Die Norm gilt nur für neue, unge-brauchte Konstruktionen.

Essais non destructifs des assemblages soudés sur produits semi-finis en thermoplastiques - Partie 4: Essais à haute tension

La présente Norme européenne spécifie l'équipement et les méthodes d'essais à haute tension des
assemblages soudés bout à bout ou à recouvrement de plaques en thermoplastiques permettant de localiser
uniquement les défauts traversants. Elle s'applique uniquement aux constructions neuves non utilisées.

Neporušitveno preskušanje zvarjenih spojev plastomernih polizdelkov - 4. del: Visokonapetostno preskušanje

Ta evropski standard določa opremo in postopke za visokonapetostno preskušanje soležnih ali prekrivnih zvarjenih spojev pri plastomernih ploščah izključno za ugotavljanje napak v debelini. Velja le za nove, neuporabljene konstrukcije.

General Information

• Status: Published
• Public Enquiry End Date: 24-Jun-2011
• Publication Date: 02-Apr-2014
• ICS: 25.160.40 - Welded joints and welds
• ICS: 83.140.01 - Rubber and plastics products in general
• Technical Committee: IPMA - Polimer materials and products
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 25-Mar-2014
• Due Date: 30-May-2014
• Completion Date: 03-Apr-2014
• Ref Project: EN 13100-4:2012 - Non destructive testing of welded joints of thermoplastics semifinished products - Part 4: High voltage testing

Overview

EN 13100-4:2012 - Non destructive testing of welded joints of thermoplastics semifinished products - Part 4: High voltage testing (CEN) specifies equipment, methods and acceptance-oriented procedures for locating through‑thickness defects in butt and overlap welded joints of thermoplastic sheets. The standard applies to new, unused constructions and focuses on high‑voltage (holiday) testing using spark testers and holiday detectors while emphasizing safety and repeatable test reporting.

Key topics and requirements

• Scope and principle: A high voltage is applied to the weld surface while the opposite side is in contact with a conductive substrate (or a wire in overlap joints). Defects are indicated by spark discharge with optical and/or acoustic signals.
• Equipment types:
  • High‑frequency spark tester - mains powered, high voltage (up to ~100 kV), visual spark indication; no substrate connection required if substrate is large metal.
  • DC holiday detector - stabilised DC output (to ~50 kV), meter readout, audio/visual alarms; substrate connection required.
  • Pulsed holiday detector - pulsed DC up to ~50 kV, higher power, works with some surface moisture; requires special meter for crest verification.
• Voltage determination: The standard provides methods to calculate the initial test voltage (VI) from sheet geometry and to calculate breakdown voltage VB = Ds × dt (Ds = dielectric strength; dt = distance through material). If VI exceeds VB, EN 13100‑4 prescribes controlled trial holes and a procedure using the measured sparking voltage (Vo) to derive the actual test voltage (VA).
• Test electrodes and technique:
  • Electrode must make continuous contact; use small brush electrodes for recesses or overlap joints; place an uninsulated wire near the inner edge for overlap tests to lower required voltage.
  • Recommended traverse speeds: up to 40 cm/s for DC/pulsed detectors, up to 20 cm/s for spark testers (manufacturers’ limits apply).
• Safety and environment: Explicit attention to electric shock risks, explosion hazards in flammable atmospheres, and electromagnetic disturbances.
• Reporting: Test report must reference EN 13100‑4 and include object ID, material, weld geometry, thickness, welding process, tester type, electrode, test voltage/spark length, defects and operator/date.

Applications and users

• Practical for NDT technicians, fabricators and quality managers who inspect welded thermoplastic sheets (e.g., geomembranes, liners, tanks, ducts) in manufacturing and field acceptance testing.
• Useful to inspection bodies, manufacturers and contractors who require a repeatable, safety‑aware method to locate through‑thickness defects prior to commissioning.

Related standards

• EN 13100‑1 - Visual examination
• EN 13100‑2 - X‑ray radiographic testing
• EN 13100‑3 - Ultrasonic testing

Keywords: EN 13100-4:2012, high voltage testing, non‑destructive testing, welded joints, thermoplastics, holiday detector, spark tester, dielectric strength, test electrode.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Neporušitveno preskušanje zvarjenih spojev plastomernih polizdelkov - 4. del: Visokonapetostno preskušanjeZerstörungsfreie Prüfung von Schweißverbindungen thermoplastischer Kunststoffe - Teil 4: HochspannungsprüfungEssais non destructifs des assemblages soudés sur produits semi-finis en thermoplastiques - Partie 4: Essais à haute tensionNon destructive testing of welded joints of thermoplastics semifinished products - Part 4: High voltage testing83.140.01Izdelki iz gume in polimernih materialov na splošnoRubber and plastics products in general25.160.40Varjeni spoji in variWelded jointsICS:Ta slovenski standard je istoveten z:EN 13100-4:2012SIST EN 13100-4:2014en,fr,de01-maj-2014SIST EN 13100-4:2014SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 13100-4
October 2012 ICS 25.160.40 English Version
Non destructive testing of welded joints of thermoplastics semifinished products - Part 4: High voltage testing
Essais non destructifs des assemblages soudés sur produits semi-finis en thermoplastiques - Partie 4 : Essais à haute tension
Zerstörungsfreie Prüfung von Schweißverbindungen thermoplastischer Kunstoffe - Teil 4: Hochspannungsprüfung This European Standard was approved by CEN on 22 September 2012.
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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13100-4:2012: ESIST EN 13100-4:2014

Symbol Designation
Unit
Ds
Dielectric strength
Vmm-1 VB Breakdown voltage V dt Distance from test electrode to conductor mm VI Initial test voltage V VA Actual voltage used for the test V Vo Voltage which causes a spark at a hole in the plastic sheet V
4 Principle of the test A high voltage is applied to one side of the joint to be tested using a suitable electrode, the other side of the material needs to be in contact with a conductive substrate which in some cases will need a connection back to the test equipment. The test shall be carried out with a voltage high enough to jump the gap between the test electrode and a conductor. A defect is indicated by a spark discharge and, depending on the equipment used, a simultaneous optical and / or acoustic signal.
The health and safety aspects (e.g. electric shocks, risks of explosions in flammable atmosphere) together with the environmental impacts (e.g. electromagnetic disturbances) shall be thoroughly considered before operating the equipment.
NOTE Moisture in concrete can make it sufficiently conductive to allow high voltage testing to be used. SIST EN 13100-4:2014
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