SIST EN ISO 3458:2015

Plastics piping systems - Mechanical joints between fittings and pressure pipes - Test method for leaktightness under internal pressure (ISO 3458:2015)

ISO 3458:2015 specifies the method of test for checking the leak tightness of assembled joints between mechanical fittings and plastic pressure pipes. The test applies regardless of the design and material of the fitting used for jointing plastic pipe.

Kunststoff-Rohrleitungssysteme - Mechanische Verbindungen zwischen Fittings und Druckrohren - Prüfung der Dichtheit bei Innendruck (ISO 3458:2015)

Die vorliegende Internationale Norm legt ein Prüfverfahren zur Überprüfung der Dichtheit von zusammen-gesetzten Verbindungen (ausgenommen Schmelzschweißverbindungen) zwischen mechanischen Fittings und thermoplastischen Druckrohren fest. Die Prüfung ist anwendbar unabhängig von Konstruktion und Werkstoff des Fittings, das für die Verbindung thermoplastischer Rohre verwendet wird.

Systèmes de canalisations en plastique - Assemblages mécaniques entre raccords et tubes sous pression - Méthode d'essai pour l'étanchéité sous pression interne (ISO 3458:2015)

L'ISO 3458 :2015 spécifie une méthode d'essai pour la vérification de l'étanchéité d'assemblages montés entre raccords mécaniques et tubes sous pression plastiques. L'essai est applicable quelles que soient la conception et la matière du raccord utilisé pour le raccordement des tubes plastiques.

Cevni sistemi iz polimernih materialov - Mehanski spoji med fitingi in tlačnimi cevmi - Metoda za preskus tesnjenja spojev, obremenjenih z notranjim hidrostatičnim tlakom (ISO 3458:2015)

General Information

• Status: Published
• Public Enquiry End Date: 14-Nov-2013
• Publication Date: 17-May-2015
• 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: 16-Apr-2015
• Due Date: 21-Jun-2015
• Completion Date: 18-May-2015
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Directive: 89/106/EEC - Construction products
• Directive: 93/38/EEC - Procurement procedures of entities operating in the water, energy, transport and telecommunications sectors
• Mandate: M/BC/CEN/88/15 - Standardization request to CEN/CENELEC in the field of Water supply, drainage and sewerage
• Ref Project: EN ISO 3458:2015 - Plastics piping systems - Mechanical joints between fittings and pressure pipes - Test method for leaktightness under internal pressure (ISO 3458:2015)

Relations

• Replaces: SIST ISO 3458:1995 - Assembled joints between fittings and polyethylene (PE) pressure pipes -- Test of leakproofness under internal pressure
• Effective Date: 04-Jun-2018
• Replaces: SIST EN 715:1997 - Thermoplastics piping systems - End-load bearing joints between small diameter pressure pipes and fittings - Test method for leaktightness under internal water pressure, including end thrust
• Effective Date: 01-Jun-2015

Overview

SIST EN ISO 3458:2015 establishes a standardized test method for evaluating the leaktightness of mechanical joints between fittings and plastic pressure pipes under internal pressure. Developed by the International Organization for Standardization (ISO) in collaboration with CEN, this European Standard replaces the earlier EN 715:1994. It applies comprehensively to any mechanical fitting design and material used in plastic piping systems, ensuring reliable assessment of joints that are critical to piping integrity.

This standard is essential for manufacturers, testing laboratories, and quality control professionals involved in plumbing, fluid transport infrastructure, and pressure piping systems. It provides a consistent methodology to verify that assembled joints maintain leak tightness under conditions exceeding nominal pipe pressure.

Key Topics

• Scope: The test method exclusively applies to mechanical joints between fittings and plastic pressure pipes. Fusion-welded joints are excluded.
• Test Principle: Leak tightness is verified by subjecting the assembled joint to an internal hydrostatic pressure greater than its nominal rating while applying longitudinal pipe stress to simulate actual service conditions.
• Test Parameters: Includes test medium (typically water or air), test pressure, duration, temperature, and free pipe length. Parameters are referenced from related standards or, if unspecified, are provided in Annex A of SIST EN ISO 3458:2015.
• Apparatus: Details a setup including pressure source, test specimen assembly, pressure measuring devices, valves, and supporting frames. A diagram illustrates the typical apparatus configuration.
• Test Pieces: Specifies that joints tested must be assembled according to the manufacturer’s instructions using pipes and fittings intended for the same nominal size and pressure rating. Materials must rest at least 24 hours before testing unless otherwise agreed.
• Procedure: Covers specimen filling, conditioning times based on pipe wall thickness, pressurization steps, and continuous monitoring of leakage and pressure stability. For water tests, removal of all air to prevent false readings is emphasized.
• Test Report: Outlines mandatory documentation including standard references, pipe and fitting identification, test conditions, measured results, and any anomalies encountered during testing.
• Safety Notes: Users must comply with laboratory safety protocols, especially when handling pressurized test media and equipment.

Applications

SIST EN ISO 3458:2015 is applicable across sectors that require dependable plastic piping systems with pressure-bearing capabilities, such as:

• Water supply and distribution systems
• Industrial fluid transport networks
• Irrigation and agricultural piping
• HVAC systems involving plastic pressure pipes
• Infrastructure requiring certified leak-resistant joints
  The standard assists manufacturers and engineers in validating mechanical joint performance to prevent leaks, minimize maintenance, and improve system safety. Test results support quality assurance, product certification, and compliance with regulatory requirements.

Related Standards

• ISO 138: Plastics pipes, fittings and valves for the transport of fluids - General standards for plastics piping components.
• EN 715:1994 - The previous European standard superseded by SIST EN ISO 3458:2015 for mechanical joint leak tightness testing.
• Other ISO standards addressing test methods and material specifications for plastic piping systems.

By following SIST EN ISO 3458:2015, stakeholders ensure rigorous, internationally recognized testing of plastic pressure pipe mechanical joints, enhancing durability, safety, and operational reliability of piping installations worldwide.

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-2015
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SIST EN 715:1997
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Plastics piping systems - Mechanical joints between fittings and pressure pipes - Test
method for leaktightness under internal pressure (ISO 3458:2015)
Kunststoff-Rohrleitungssysteme - Mechanische Verbindungen zwischen Fittings und
Druckrohren - Prüfung der Dichtheit bei Innendruck (ISO 3458:2015)
Systèmes de canalisations en plastique - Assemblages mécaniques entre raccords et
tubes sous pression - Méthode d'essai pour l'étanchéité sous pression interne (ISO
3458:2015)
Ta slovenski standard je istoveten z: EN ISO 3458:2015
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.

EUROPEAN STANDARD
EN ISO 3458
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2015
ICS 23.040.60 Supersedes EN 715:1994
English Version
Plastics piping systems - Mechanical joints between fittings and
pressure pipes - Test method for leaktightness under internal
pressure (ISO 3458:2015)
Systèmes de canalisations en plastique - Assemblages Kunststoff-Rohrleitungssysteme - Mechanische
mécaniques entre raccords et tubes sous pression - Verbindungen zwischen Fittings und Druckrohren - Prüfung
Méthode d'essai pour l'étanchéité sous pression interne der Dichtheit bei Innendruck (ISO 3458:2015)
(ISO 3458:2015)
This European Standard was approved by CEN on 14 November 2014.

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

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 3458:2015 E
worldwide for CEN national Members.

Contents Page
Foreword .3
Foreword
This document (EN ISO 3458:2015) 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 2015, and conflicting national standards shall be withdrawn at
the latest by October 2015.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 715:1994.
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, 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 the United Kingdom.
Endorsement notice
The text of ISO 3458:2015 has been approved by CEN as EN ISO 3458:2015 without any modification.

INTERNATIONAL ISO
STANDARD 3458
Second edition
2015-04-01
Plastics piping systems — Mechanical
joints between fittings and pressure
pipes — Test method for leaktightness
under internal pressure
Systèmes de canalisations en plastique — Assemblages mécaniques
entre raccords et tubes sous pression — Méthode d’essai pour
l’étanchéité sous pression interne
Reference number
ISO 3458:2015(E)
©
ISO 2015
ISO 3458:2015(E)
© ISO 2015
All rights reserved. Unless otherwise specified, 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.
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ii © ISO 2015 – All rights reserved

ISO 3458:2015(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Principle . 1
3 Test parameters and requirements . 1
4 Apparatus . 1
5 Test pieces . 3
6 Procedure. 3
7 Test report . 3
Annex A (normative) Test parameters . 5
ISO 3458:2015(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 Commissi
...