EN 17970:2024

SLOVENSKI STANDARD
01-september-2024
Cevi iz duktilne železove litine - Spoji za cevne sisteme iz duktilne železove litine -
Odpornost proti vraščanju korenin - Zahteve in preskusne metode
Ductile iron pipes - Push-in joints for ductile iron pipe systems - Resistance against root
intrusion - Requirements and test methods
Rohre aus duktilem Gusseisen - Steckmuffen-Verbindungen für Rohrsysteme aus
duktilem Gusseisen – Widerstandsfähigkeit gegen Wurzeleinwuchs - Anforderungen und
Prüfverfahren
Tuyaux en fonte ductile - Assemblages automatiques pour systèmes de tuyaux en fonte
ductile - Résistance à la pénétration des racines - Exigences et méthodes d’essai
Ta slovenski standard je istoveten z: EN 17970:2024
ICS:
23.040.10 Železne in jeklene cevi Iron and steel pipes
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 17970
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2024
EUROPÄISCHE NORM
ICS 23.040.10
English Version
Ductile iron pipes - Push-in joints for ductile iron pipe
systems - Resistance against root penetration -
Requirements and test methods
Tuyaux en fonte ductile - Assemblages automatiques Rohre aus duktilem Gusseisen - Steckmuffen-
pour systèmes de canalisation en fonte ductile - Verbindungen für Rohrsysteme aus duktilem
Résistance à la pénétration des racines - Exigences et Gusseisen - Widerstandsfähigkeit gegen
méthodes d'essai Wurzeleinwuchs - Anforderungen und Prüfverfahren
This European Standard was approved by CEN on 19 May 2024.

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, Türkiye 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
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 17970:2024 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 Requirements . 6
5 Test method . 6
5.1 Principle . 6
5.2 Preparation of the specimen . 7
5.3 Performing the test . 7
5.4 Evaluation and representation of test results . 8
Annex A (informative) Influences on the resistance against root penetration into assembled
pipe joints .10
Bibliography .11
European foreword
This document (EN 17970:2024) has been prepared by Technical Committee CEN/TC 203 “Cast iron
pipes, fittings and their joints”, the secretariat of which is held by AFNOR.
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 December 2024, and conflicting national standards shall
be withdrawn at the latest by December 2024.
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.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
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, Türkiye and the United
Kingdom.
Introduction
The test described in this document is adjusted from a standardized test method for plastic pipes to the
characteristics of push-in joints for ductile iron pipe systems.
The undesired penetration of tree roots into push-in joints
— causes obstacles to flow with the resulting risks of blockages and backing-up;
— causes leakage in sewage systems with the hazards to the soil and groundwater which this entails;
— leads to high, recurring costs for root removal;
— needs the replacement or renovation of the affected section of sewage or drainage system.
In this case, even after replacement or renovation, the cause often remains in effect – namely the close
proximity of the tree with the route of the drainage and sewage system. Therefore, root-resistant pipe
systems should be used when laying new drainage and sewage systems and replacing existing ones.
1 Scope
This document is applicable to diffusion-tight pipes, accessories and fittings in ductile cast iron to EN 598
and to cast iron pipe systems.
The document gives requirements on the contact pressure based on a risk assessment and gives a test
method that simulates the penetration of a root tip into the sealing gap.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 598:2007+A1:2009, Ductile iron pipes, fittings, accessories and their joints for sewerage applications —
Requirements and test methods
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org
3.1
root penetration
penetration of tree root tips into the sealing gap of push-in-joints
3.2
contact pressure
pressure between the metallic se
...