SIST EN ISO 3459:2022

Plastic piping systems - Mechanical joints between fittings and pressure pipes - Test method for leaktightness under negative pressure (ISO 3459:2022)

This document specifies two methods of testing for checking the leaktightness of assembled joints between mechanical fittings and plastic pressure pipes with diameters up to and including 63 mm. The test applies regardless of the design and material of the fitting used for jointing plastics pipe.
This test method is not applicable to fusion-welded joints.

Kunststoff-Rohrleitungssysteme - Mechanische Verbindungen zwischen Formstücken und Druckrohren - Prüfung der Dichtheit bei Unterdruck (ISO 3459:2022)

Dieses Dokument legt zwei Prüfverfahren zur Prüfung der Dichtheit von montierten Verbindungen zwischen mechanischen Formstücken und Kunststoffdruckrohren mit einem Durchmesser bis einschließlich 63 mm fest. Die Prüfung ist anwendbar unabhängig von Konstruktion und Werkstoff des Formstückes, das zum Verbinden von Kunststoffrohren verwendet wird.
Dieses Prüfverfahren ist nicht für Schmelzschweißverbindungen anwendbar.

Systèmes de canalisations en matières plastiques - Assemblages mécaniques entre raccords et tubes sous pression - Méthode d'essai pour l'étanchéité sous pression négative (ISO 3459:2022)

Le présent document spécifie deux méthodes d’essai pour la vérification de l’étanchéité des assemblages entre raccords mécaniques et tubes sous pression en plastique dont le diamètre est inférieur ou égal à 63 mm. L’essai s’applique quelles que soient la conception et la matière du raccord utilisé pour le raccordement du tube plastique.
La présente méthode d’essai n’est pas applicable aux assemblages soudés par fusion.

Cevni sistemi iz polimernih materialov - Mehanski spoji med fitingi in tlačnimi cevmi - Metoda za preskus tesnjenja spojev, obremenjenih s podtlakom (ISO 3459:2022)

Ta dokument določa dve metodi preskušanja za preverjanje tesnjenja sestavljenih spojev med mehanskimi fitingi in plastičnimi tlačnimi cevmi s premerom do vključno 63 mm. Preskus velja ne glede na zasnovo in material fitinga, ki se uporablja za spajanje plastičnih cevi. Ta preskusna metoda se ne uporablja za talilno zvarjene spoje.

General Information

• Status: Published
• Public Enquiry End Date: 02-Aug-2021
• Publication Date: 05-May-2022
• ICS: 23.040.60 - Flanges, couplings and joints
• Technical Committee: PCV - Plastic pipes, fittings and valves
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 25-Apr-2022
• Due Date: 30-Jun-2022
• Completion Date: 06-May-2022
• Ref Project: EN ISO 3459:2022 - Plastic piping systems - Mechanical joints between fittings and pressure pipes - Test method for leaktightness under negative pressure (ISO 3459:2022)

Relations

• Replaces: SIST EN ISO 3459:2015 - Plastic piping systems - Mechanical joints between fittings and pressure pipes - Test method for leaktightness under negative pressure (ISO 3459:2015)
• Effective Date: 01-Jun-2022

Overview

EN ISO 3459:2022 - “Plastic piping systems - Mechanical joints between fittings and pressure pipes - Test method for leaktightness under negative pressure” - is a CEN-endorsed adoption of ISO 3459:2022. It specifies two laboratory test procedures for verifying the leaktightness of assembled mechanical joints (non‑fusion) between fittings and plastic pressure pipes with diameters up to and including 63 mm when the joint is subjected to external pressure or internal vacuum.

Key topics and technical requirements

• Scope: Applies to mechanical joints regardless of fitting design or material; not applicable to fusion-welded joints. Supersedes EN ISO 3459:2015.
• Two procedures
  • Procedure A (pressure outside): Pipe interior open to atmosphere while an enclosed tank applies external hydraulic pressure to the joint.
  • Procedure B (vacuum inside): A partial vacuum is drawn inside the pipe while atmospheric pressure acts externally.
• Test parameters required by the referring standard (or Annex A if unspecified):
  • Test medium, test pressure, duration, test temperature, free length.
• Apparatus examples
  • Procedure A: enclosed tank, hydraulic pump (pressure control ±0.05 bar), pressure gauge, temperature control (±2 °C), visual access.
  • Procedure B: vacuum pump, vacuum gauge (accuracy ±0.01 bar), shut‑off valve, end‑seals and thermometers.
• Specimen and preparation
  • Test pieces consist of fitting(s) assembled with pipe segments; assembly per manufacturer’s instructions.
  • Components shall not be tested until 24 h after production (shorter preconditioning allowed for practical reasons; 24 h in disputes).
  • Pipe/fitting dimensions should ideally be near tolerance extremes to simulate worst‑case sealing conditions.
• Procedure highlights
  • Conditioning and temperature stabilization, drying the internal surface (Procedure A), staged pressure application with minimum hold times (typically 1 hour at each stage), and inspection for leakage.
  • Test report requirements and measurable criteria for accepting leaktightness are defined in the standard.

Practical applications

• Quality assurance and type testing of mechanical fittings and joint systems for water distribution, drainage, and other fluid transport where negative pressure or external loading could occur.
• Verification of joint performance in product development, manufacturing QC, conformity assessment and third‑party certification.
• Useful for manufacturers, test laboratories, standards bodies, product certification agencies, and installers specifying compliant components.

Who should use this standard

• Manufacturers of plastic pipes and mechanical fittings
• Independent test laboratories performing leaktightness testing
• Certification bodies and compliance engineers
• Design and installation professionals specifying components for systems exposed to vacuum or external pressure

Related standards / notes

• EN ISO 3459:2022 was prepared by ISO/TC 138 and CEN/TC 155 and is intended to be referenced by other product or system standards specifying test parameter values. Always consult the referring standard for project‑specific test conditions.

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-2022
Nadomešča:
SIST EN ISO 3459:2015
Cevni sistemi iz polimernih materialov - Mehanski spoji med fitingi in tlačnimi
cevmi - Metoda za preskus tesnjenja spojev, obremenjenih s podtlakom (ISO
3459:2022)
Plastic piping systems - Mechanical joints between fittings and pressure pipes - Test
method for leaktightness under negative pressure (ISO 3459:2022)
Kunststoff-Rohrleitungssysteme - Mechanische Verbindungen zwischen Formstücken
und Druckrohren - Prüfung der Dichtheit bei Unterdruck (ISO 3459:2022)
Systèmes de canalisations en matières plastiques - Assemblages mécaniques entre
raccords et tubes sous pression - Méthode d'essai pour l'étanchéité sous pression
négative (ISO 3459:2022)
Ta slovenski standard je istoveten z: EN ISO 3459:2022
ICS:
23.040.60 Prirobnice, oglavki in spojni Flanges, couplings and joints
elementi
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 3459
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2022
EUROPÄISCHE NORM
ICS 23.040.60 Supersedes EN ISO 3459:2015
English Version
Plastic piping systems - Mechanical joints between fittings
and pressure pipes - Test method for leaktightness under
negative pressure (ISO 3459:2022)
Systèmes de canalisations en matières plastiques - Kunststoff-Rohrleitungssysteme - Mechanische
Assemblages mécaniques entre raccords et tubes sous Verbindungen zwischen Formstücken und
pression - Méthode d'essai pour l'étanchéité sous Druckrohren - Prüfung der Dichtheit bei Unterdruck
pression négative (ISO 3459:2022) (ISO 3459:2022)
This European Standard was approved by CEN on 27 March 2022.

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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 3459:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 3459:2022) has been prepared by Technical Committee ISO/TC 138 "Plastics
pipes, fittings and valves for the transport of fluids" in collaboration with Technical Committee CEN/TC
155 “Plastics piping systems and ducting systems” the secretariat of which is held by NEN.
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 October 2022, and conflicting national standards shall
be withdrawn at the latest by October 2022.
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 ISO 3459:2015.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations 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.
Endorsement notice
The text of ISO 3459:2022 has been approved by CEN as EN ISO 3459:2022 without any modification.

INTERNATIONAL ISO
STANDARD 3459
Third edition
2022-03
Plastic piping systems — Mechanical
joints between fittings and pressure
pipes — Test method for leaktightness
under negative pressure
Systèmes de canalisations en matières plastiques — Assemblages
mécaniques entre raccords et tubes sous pression — Méthode d'essai
pour l'étanchéité sous pression négative
Reference number
ISO 3459:2022(E)
ISO 3459:2022(E)
© ISO 2022
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
ISO 3459:2022(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Test parameters and requirements .1
6 Apparatus . 2
6.1 Apparatus for Procedure A . 2
6.2 Apparatus for Procedure B . 3
7 Test pieces .4
8 Procedure A: Pressure outside .4
9 Procedure B: Vacuum inside .5
10 Test report . 5
Annex A (normative) Test parameters . 6
iii
ISO 3459:2022(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduct
...