EN ISO 3503:2015

Plastics piping systems - Mechanical joints between fittings and pressure pipes - Test method for leaktightness under internal pressure of assemblies subjected to bending (ISO 3503:2015)

ISO 3503:2015 specifies a method for checking the leak tightness under internal pressure of assembled joints between mechanical fittings and plastic pressure pipes when subjected to bending. It defines the calculation method for the average bending radius and how to perform this bending.
Checking of the leak tightness under internal pressure is carried out in accordance with the method given in ISO 3458.
This test method is not applicable to fusion-welded joints.

Kunststoff-Rohrleitungssysteme - Mechanische Verbindungen zwischen Fittings und Druckrohren - Prüfverfahren für die Dichtheit von Verbindungen bei Innendruck und gleichzeitiger Biegebeanspruchung (ISO 3503:2015)

Diese Internationale Norm legt ein Verfahren zur Prüfung der Dichtheit unter Innendruck von zusammen-gesetzten Verbindungen zwischen mechanischen Fittings (Formstücken) und Kunststoff-Druckrohren bei gleichzeitig einwirkender Biegung fest. Sie legt das Berechnungsverfahren für den mittleren Biegeradius und die Ausführung dieser Biegung fest.
Die Prüfung der Dichtheit unter Innendruck erfolgt nach dem in ISO 3458 beschriebenen Verfahren.
Das Prüfverfahren gilt nicht für Schmelzschweißverbindungen.

Systèmes de canalisations en plastique - Assemblages mécaniques entre raccords et tubes sous pression - Méthode d'essai pour l'étanchéité sous pression interne de montages soumis à une courbure (ISO 3503:2015)

L'ISO 3503:2015 spécifie une méthode d'essai pour la vérification de l'étanchéité sous pression interne des assemblages montés entre raccords mécaniques et tubes sous pression plastiques lorsqu'ils sont soumis à une courbure. L'ISO 3503:2015 définit les méthodes de calcul du rayon de courbure moyen et les moyens à utiliser pour réaliser cette courbure.

Cevni sistemi iz polimernih materialov - Mehanski spoji med fitingi in tlačnimi cevmi - Metoda za preskus tesnjenja spojev, obremenjenih z notranjim tlakom in izpostavljenih upogibu (ISO 3503:2015)

General Information

• Status: Published
• Publication Date: 03-Mar-2015
• Withdrawal Date: 29-Sep-2015
• ICS: 23.040.60 - Flanges, couplings and joints
• Technical Committee: CEN/TC 155 - Plastics piping systems and ducting systems
• Drafting Committee: CEN/TC 155 - Plastics piping systems and ducting systems
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 04-Mar-2015
• Completion Date: 04-Mar-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: SIST EN ISO 3503:2015 - Plastics piping systems - Mechanical joints between fittings and pressure pipes - Test method for leaktightness under internal pressure of assemblies subjected to bending (ISO 3503:2015)

Relations

• Replaces: EN 713:1993 - Plastics piping systems - Mechanical joints between fittings and polyolefin pressure pipes - Test method for leaktightness under internal pressure of assemblies subjected to bending
• Effective Date: 11-Mar-2015

Overview

EN ISO 3503:2015 is an international standard published by CEN that specifies the test method for leaktightness of mechanical joints between fittings and plastic pressure pipes when subjected to bending under internal pressure. This standard is crucial for ensuring the reliability and safety of plastics piping systems used in fluid transport applications. Specifically, it addresses the integrity of assemblies subjected to bending stresses, defining how to calculate the average bending radius and execute bending during testing.

This standard applies to mechanical joints and explicitly excludes fusion-welded joints. The leak tightness evaluation is performed in accordance with ISO 3458, another key standard that governs the test method for leaktightness under internal pressure.

Key Topics

• Scope and Application: EN ISO 3503:2015 covers test methods for mechanical joints in plastic pressure piping systems under bending loads, excluding fusion-welded joints.
• Test Principle: The method involves applying an internal pressure to an assembled joint containing one test fitting while bending the pipe with a calculated average bending radius.
• Calculation of Bending Radius: The average bending radius is calculated based on the nominal pipe diameter and internal pressure, ensuring standardized bending conditions during testing.
• Test Parameters: Essential parameters include:
  • Test medium (usually water)
  • Test pressure (expressed in bar or MPa)
  • Test duration (hours)
  • Test temperature (°C)
  • Free length between fittings (usually 10 times nominal pipe diameter)
  • Bending radius, varying with nominal pressure class:
    • 15 times pipe diameter for ≤ 1 MPa
    • 20 times pipe diameter for > 1 MPa
• Apparatus and Setup: The standard describes a suitable test rig including bending gauge, pressurizing system, valves, pressure gauges, and fittings as illustrated in Figure 1 of the document.
• Test Procedure: Specifies how to mount the test specimens on the apparatus, apply bending and pressure according to the parameters, and monitor for leakages.
• Reporting Requirements: The test report must document all relevant details such as the standard references, materials tested, test conditions, bending radius, test results, and any abnormal occurrences.

Applications

EN ISO 3503:2015 is vital for manufacturers, testing laboratories, and quality assurance professionals involved in the development, certification, and maintenance of plastic piping systems used in industries such as:

• Water supply and distribution
• Industrial fluid transport
• HVAC systems involving plastic pressure pipes
• Infrastructure projects where mechanical fittings in plastic pipes are standard
• Ensuring compliance with safety and performance requirements for piping under bending stresses

Applying this standard helps verify that mechanical pipe fittings maintain leak tightness even when bent, ensuring system integrity and preventing fluid leakage failures during installation or operation.

Related Standards

• ISO 3458: Specifies the test method for leaktightness under internal pressure and is referenced by EN ISO 3503:2015 for carrying out the leak tightness check.
• EN 713:1993: The previous European standard superseded by EN ISO 3503:2015.
• Other relevant standards in the ISO/TC 138 series related to plastics piping systems that address different aspects of pipe joints, fittings, valves, and testing methods.

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Keywords: EN ISO 3503:2015, plastics piping systems, mechanical joints, pressure pipes, bending test, leak tightness, internal pressure, test method, plastic fittings, leaktightness testing, pipe bending radius, plastic pipe assemblies, mechanical fitting integrity, ISO 3458, plastic pipe testing standards.

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-2015
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SIST EN 713:1997
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Plastics piping systems - Mechanical joints between fittings and pressure pipes - Test
method for leaktightness under internal pressure of assemblies subjected to bending
(ISO 3503:2015)
Kunststoff-Rohrleitungssysteme - Mechanische Verbindungen zwischen Fittings und
Druckrohren - Prüfverfahren für die Dichtheit von Verbindungen bei Innendruck und
gleichzeitiger Biegebeanspruchung (ISO 3503:2015)
Systèmes de canalisations en plastique - Assemblages mécaniques entre raccords et
tubes sous pression - Méthode d'essai pour l'étanchéité sous pression interne de
montages soumis à une courbure (ISO 3503:2015)
Ta slovenski standard je istoveten z: EN ISO 3503:2015
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 3503
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2015
ICS 23.040.60 Supersedes EN 713:1993
English Version
Plastics piping systems - Mechanical joints between fittings and
pressure pipes - Test method for leaktightness under internal
pressure of assemblies subjected to bending (ISO 3503:2015)
Systèmes de canalisations en plastique - Assemblages Kunststoff-Rohrleitungssysteme - Mechanische
mécaniques entre raccords et tubes sous pression - Verbindungen zwischen Fittings und Druckrohren -
Méthode d'essai pour l'étanchéité sous pression interne de Prüfverfahren für die Dichtheit von Verbindungen bei
montages soumis à une courbure (ISO 3503:2015) Innendruck und gleichzeitiger Biegebeanspruchung (ISO
3503:2015)
This European Standard was approved by CEN on 8 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 3503:2015 E
worldwide for CEN national Members.

Contents Page
Foreword .3
Foreword
This document (EN ISO 3503:2015) 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 September 2015, and conflicting national standards shall be
withdrawn at the latest by September 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 713:1993.
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 3503:2015 has been approved by CEN as EN ISO 3503:2015 without any modification.
INTERNATIONAL ISO
STANDARD 3503
Second edition
2015-03-01
Plastics piping systems — Mechanical
joints between fittings and pressure
pipes — Test method for leaktightness
under internal pressure of assemblies
subjected to bending
Systèmes de canalisations en plastique — Assemblages mécaniques
entre raccords et tubes sous pression — Méthode d’essai pour
l’étanchéité sous pression interne de montages soumis à une courbure
Reference number
ISO 3503:2015(E)
©
ISO 2015
ISO 3503:2015(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.
ISO copyright office
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Tel. + 41 22 749 01 11
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Published in Switzerland
ii © ISO 2015 – All rights reserved

ISO 3503:2015(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Principle . 1
4 Test parameters and requirements . 1
5 Apparatus . 2
6 Test pieces . 4
7 Procedure. 4
8 Test report . 4
Annex A (normative) Test parameters . 5
...