SIST EN 14525:2022
(Main)Ductile iron and steel wide tolerance couplings and flange adaptors for use with pipes of different materials: ductile iron, Grey iron, steel, PVC-U, PVC-O, PE, fibre-cement
Ductile iron and steel wide tolerance couplings and flange adaptors for use with pipes of different materials: ductile iron, Grey iron, steel, PVC-U, PVC-O, PE, fibre-cement
This document specifies the requirements and associated test methods applicable to wide tolerance ductile iron and steel couplings, stepped/reducing couplings and flange adaptors intended for use with pipe components made from a number of pipe materials (ductile iron, grey iron, PE in conformity with EN 12201-1 to EN 12201-5, PVC-U in conformity with EN ISO 1452-1 to EN ISO 1452-5, steel, fibre-cement), for providing a leak tight seal over a wide range of pipe outside diameters:
- to convey water (e.g. water intended for human consumption );
- with or without pressure;
- to be installed below or above ground, inside or outside buildings.
This document is not intended to cover sewerage or gas applications, where additional requirements may be necessary.
This document specifies requirements for materials, dimensions and tolerances, mechanical properties and standard coatings of products.
This document covers wide tolerance couplings, stepped/reducing couplings and flange adaptors:
- Manufactured with socketed or flanged ends;
- Supplied externally and internally coated;
- Suitable for ductile iron in conformity with EN 545, grey iron, PE in conformity with EN 12201-1 to EN 12201-5, PVC-U in conformity with EN ISO 1452-1 to EN ISO 1452-5, steel, fibre-cement in a size range extending from DN 40 to DN 700, for an allowable operating pressure (PFA) up to 16 bar, for fluid temperatures between 0 °C and 25 °C excluding frost. For higher temperatures, (up to 45 °C for PVC-U or 40 °C for PE) the PFA is derated as given in EN ISO 1452 and EN 12201;
- Not intended for use in areas subjected to reaction to fire regulations.
NOTE 1 This does not preclude special arrangements for the products to be used at higher temperatures. Temperature limitations and pressure limitations are those coming from the PVC-U or PE pipes.
This document covers ductile iron couplings, stepped/reducing couplings and flange adaptors cast by any type of foundry process or manufactured by fabrication of cast components, as well as corresponding joints, in a size range extending from DN 40 to DN 700, to be used with pipes of external diameter from 40 mm to 710 mm.
As long as no equivalent European Standard exists for steel accessories, this document also covers couplings and flange adaptors which are fabricated partly or entirely from steel as well as corresponding joints, in a size range extending from DN 60 to DN 700, to be used with pipes of external diameter from 63 mm to 710 mm.
This document specifies requirements for materials, dimensions and tolerances, mechanical properties and standard coatings. It also gives minimum performance requirements for all components, including restrained and non-restrained flexible joints. Joint design and gasket shapes are outside the scope of this document.
NOTE 2 PFA can be limited depending on pipe materials effectively connected.
NOTE 3 In this document, if not specified, all pressures are relative gauge pressures, expressed in bars (100 kPa = 1 bar).
Großbereichskupplungen und Flanschadapter aus duktilem Gusseisen und Stahl zur Verbindung von Rohren aus unterschiedlichen Werkstoffen: duktiles Gusseisen, Grauguss, Stahl, PVC-U, PVC-O, PE, Faserzement
Dieses Dokument legt die Anforderungen und die diesbezüglichen Prüfverfahren fest, die auf Großbereichskupplungen, gestufte/reduzierte Großbereichskupplungen und flanschadapter aus duktilem Gusseisen und Stahl (bei Stahl auf bestimmte Größen begrenzt) anwendbar sind, die zur Verwendung mit Rohrleitungsbauteilen aus einer Reihe von Werkstoffen (duktiles Gusseisen, Grauguss, PE in Überein-stimmung mit EN 12201-1 bis EN 12201-5, PVC U in Übereinstimmung mit EN ISO 1452-1 bis EN ISO 1452-5, PVC O in Übereinstimmung mit EN 17176-1 bis EN 17176-5, Stahl, Faserzement) vorgesehen sind, um für einen großen Bereich von Rohr-Außendurchmessern eine leckagefreie Abdichtung zu erreichen:
- zum Transport von Wasser (z. B. Wasser für den menschlichen Gebrauch);
- mit oder ohne Druck;
- oberirdisch oder erdverlegt, innerhalb oder außerhalb von Gebäuden.
Dieses Dokument gilt nicht für Anwendungsfälle im Bereich der Abwasser- und Gasinstallationen, für die zusätzliche Anforderungen gelten können.
Diese Norm legt die Anforderungen an die Werkstoffe, Maße und Toleranzen, Festigkeitseigenschaften und die Standardbeschichtungen von Produkten fest.
Dieses Dokument behandelt Großbereichskupplungen, gestufte/reduzierte Großbereichskupplungen und Flanschadapter:
- gefertigt mit Muffen oder Flansch als Anschlussenden;
- mit Außen- und Innenbeschichtung geliefert;
- geeignet für Rohre aus duktilem Gusseisen nach EN 545, Grauguss, PE nach EN 12201-1 bis EN 12201-5, PVC U nach EN ISO 1452-1 bis EN ISO 1452-5, PVC O nach EN 17176-1 bis EN 17176-5, Stahl, Faserzement in einem Nennweitenbereich von DN 40 bis DN 800 für einen zulässigen Bauteilbetriebs¬druck (PFA) von bis zu 16 bar für Flüssigkeitstemperaturen zwischen 0 °C und 25 °C ohne Frost. Bei höheren Temperaturen (bis zu 45 °C für PVC U und PVC O oder 40 °C für PE) wird die PFA nach EN ISO 1452 und EN 12201 herabgesetzt;
- nicht für den Einsatz in Bereichen vorgesehen, die Brandschutzbestimmungen unterliegen.
ANMERKUNG 1 Das schließt keine besonderen Vorkehrungen für die Verwendung der Produkte aus, die bei höheren Temperaturen verwendet werden müssen. Temperatur- und Druckbeschränkungen sind die, die von den PVC U-, PVC O- oder PE Rohren ausgehen.
In diesem Dokument werden Kupplungen, gestufte/reduzierte Kupplungen und Flanschadapter aus duktilem Eisen behandelt, die durch jedes Gießverfahren gegossen oder mithilfe von Gussbauteilen gefertigt wurden, sowie entsprechende Verbindungen in einem Nennweitenbereich von DN 40 bis DN 800.
Solange es für Stahlzubehörteile keine gleichwertige europäische Norm gibt, umfasst dieses Dokument auch Kupplungen und Flanschadapter, die teilweise oder vollständig aus Stahl gefertigt sind, sowie entsprechende Verbindungen in einem Nennweitenbereich von DN 600 bis DN 800.
Dieses Dokument legt die Anforderungen an die Werkstoffe, Maße und Toleranzen, Festigkeitseigenschaften und die Standardbeschichtungen fest. Es enthält auch Mindestanforderungen an die Funktionstüchtigkeit für alle Bauteile, einschließlich beweglicher längskraftschlüssiger und nicht längskraftschlüssiger Verbindungen. Die Ausführung der Verbindungen und die Formen der Dichtungen fallen nicht in den Anwendungsbereich dieses Dokuments.
ANMERKUNG 2 Der zulässige Bauteilbetriebsdruck (PFA) kann je nach dem Werkstoff des angeschlossenen Rohres begrenzt sein.
ANMERKUNG 3 Wenn nicht anders festgelegt, sind in diesem Dokument alle Drücke relative Überdrücke und werden in bar angegeben (100 kPa = 1 bar).
Manchons et adaptateurs de brides à larges tolérances en fonte ductile et acier destinés à être utilisés avec des tuyaux faits de différents matériaux : fonte ductile, fonte grise, acier, PVC-U, PVC-O, PE, fibre-ciment
Le présent document spécifie les prescriptions et les méthodes d’essai associées applicables aux manchons, aux manchons dissymétriques/de réduction et aux adaptateurs de brides à larges tolérances en fonte ductile et en acier (dimensions restreintes pour l’acier), destinés à être utilisés avec des tuyaux faits d’un certain nombre de matériaux (fonte ductile, fonte grise, PE en conformité avec les normes EN 12201 1 à EN 12201 5, PVC-U en conformité avec les normes EN ISO 1452 1 à EN ISO 1452 5, PVC-O en conformité avec les normes EN 17176 1 à EN 17176 5, acier, fibre-ciment), afin d’assurer un assemblage étanche sur une large plage de diamètres extérieurs de tuyaux :
pour transporter de l’eau (par exemple de l’eau destinée à la consommation humaine) ;
avec ou sans pression ;
pour être installés dans le sol ou en aérien, à l’intérieur ou à l’extérieur des bâtiments.
Le présent document ne couvre pas les applications assainissement ou gaz, où des prescriptions supplémentaires peuvent être nécessaires.
Ce document spécifie les prescriptions relatives aux matériaux, aux dimensions et aux tolérances, aux propriétés mécaniques et aux revêtements normalisés des produits.
Le présent document couvre les manchons, les manchons dissymétriques/de réduction et les adaptateurs de brides à larges tolérances :
fabriqués avec des extrémités à emboîture ou à bride ;
livrés revêtus extérieurement et intérieurement ;
adaptés pour les tuyaux en fonte ductile en conformité avec l’EN 545, la fonte grise, le PE en conformité avec les normes EN 12201 1 à EN 12201 5, le PVC-U en conformité avec les normes EN ISO 1452 1 à EN ISO 1452 5, le PVC-O en conformité avec les normes EN 17176 1 à EN 17176 5, l’acier, la fibre-ciment pour la gamme des DN 40 à DN 800, pour une pression de fonctionnement admissible (PFA) allant jusqu’à 16 bar et des températures de fluide comprises entre 0 °C et 25 °C, hors gel. Pour des températures supérieures (jusqu’à 45 °C pour le PVC-U et le PVC-O ou 40 °C pour le PE), la PFA est réduite conformément à l’EN ISO 1452 et à l’EN 12201 ;
non destinés à l’usage dans des domaines soumis une réglementation sur les risques d’incendie.
NOTE 1 Ceci n’exclut pas les dispositions spéciales permettant d’utiliser les produits à des températures plus élevées. Les limitations de température et de pression sont celles qui proviennent des tuyaux en PVC-U, en PVC O ou en PE.
Le présent document traite des manchons, des manchons dissymétriques/de réduction et des adaptateurs de brides en fonte ductile, coulés par tout procédé de fonderie ou fabriqués à partir de composants moulés, ainsi que les assemblages correspondants, pour la gamme des DN 40 à DN 800.
Dans la mesure où aucune Norme européenne équivalente n’existe pour les accessoires en acier, le présent document traite également des manchons et des adaptateurs de brides fabriqués à partir d’acier, ainsi que les assemblages correspondants, pour la gamme des DN 600 à DN 800.
Ce document spécifie les prescriptions relatives aux matériaux, aux dimensions et aux tolérances, aux propriétés mécaniques et aux revêtements normalisés. Il indique également des prescriptions de performance minimales pour tous les composants, y compris les assemblages flexibles verrouillés ou non. La conception des assemblages et la forme des garnitures de joints sortent du domaine d’application du présent document.
NOTE 2 Selon le matériau de tuyau effectivement assemblé, la PFA peut être réduite.
NOTE 3 Dans ce document, si cela n’est pas précisé, toutes les pressions sont des pressions relatives, exprimées en bars (100 kPa = 1 bar).
Spojke in prirobnične prilagoditve široke uporabe za cevi iz različnih materialov: duktilne litine, sive litine, jekla, PVC-U, PVC-O, PE, vlaknatega cementa
Ta dokument določa zahteve in povezane preskusne metode, ki se uporabljajo za spojke iz duktilne litine in jekla široke uporabe, stopenjske/redukcijske spojke in prirobnične prilagoditve za sestavne dele cevi iz različnih materialov (duktilne litine, sive litine, PE v skladu s standardi od EN 12201-1 do EN 12201-5, PVC-U v skladu s standardi od EN ISO 1452-1 do EN ISO 1452-5, jekla, vlaknatega cementa) za zagotavljanje neprepustnega tesnila v širokem razponu zunanjih premerov cevi:
– za prenos vode (npr. pitne vode);
– tlačnih ali netlačnih;
– za podzemno ali nadzemno vgradnjo v stavbah ali na prostem.
Ta dokument ne zajema področja kanalizacije ali uporabe plina, pri katerem so lahko potrebne dodatne zahteve.
Ta dokument določa zahteve za materiale, dimenzije in tolerance ter mehanske lastnosti in standardne premaze izdelkov.
Ta dokument zajema spojke široke uporabe, stopenjske/redukcijske spojke in prirobnične prilagoditve, ki:
– so izdelane z vtičnimi ali prirobničnimi zaključki;
– so dobavljene z zunanjim in notranjim premazom;
– so primerne za duktilno litino v skladu s standardom EN 545, sivo litino, PE v skladu s standardi od EN 12201-1 do EN 12201-5, PVC-U v skladu s standardi od EN ISO 1452-1 do EN ISO 1452-5, jeklo in vlaknati cement velikosti od DN 40 do DN 700, z dovoljenim obratovalnim tlakom (PFA) do 16 barov ter temperaturami tekočine med 0 °C in 25 °C, brez zamrznitve. Za višje temperature (do 45 °C za PVC-U ali 40 °C za PE) je PFA omejen, kot je določeno v standardih EN ISO 1452 in EN 12201;
– niso za uporabo na področjih, za katere veljajo predpisi o odzivu na ogenj.
OPOMBA 1: To ne izključuje posebnih ureditev za izdelke, ki se uporabljajo pri višjih temperaturah. Omejitve glede temperature in tlaka veljajo za cevi iz PVC-U ali PE.
Ta dokument zajema spojke iz duktilne litine, stopničaste/redukcijske spojke in prirobnične prilagoditve, ulite s katerim koli livarskim postopkom ali proizvedene z izdelavo litih sestavnih delov, ter ustrezne spoje velikosti od DN 40 do DN 700, ki se uporabljajo s cevmi z zunanjim premerom od 40 mm do 710 mm.
Če za sklope iz jekla ni enakovrednega evropskega standarda, ta dokument zajema tudi spojke in prirobnične prilagoditve, ki so v celoti ali delno izdelane iz jekla, ter ustrezne spoje velikosti od DN 60 do DN 700, ki se uporabljajo s cevmi z zunanjim premerom od 63 mm do 710 mm.
Ta dokument določa zahteve za materiale, dimenzije in tolerance ter mehanske lastnosti in standardne premaze. Določa tudi zahteve glede zmogljivosti za vse sestavne dele, vključno s pritrjenimi in nepritrjenimi gibkimi spoji. Zasnova spojev in oblike tesnil ne spadajo na področje uporabe tega dokumenta.
OPOMBA 2: Dovoljeni obratovalni tlak je lahko omejen, kar je odvisno od učinkovitosti povezave materialov cevi.
OPOMBA 3: Če ni drugače navedeno, so vsi tlaki v tem dokumentu relativni tlaki v merilniku, izraženi v barih (100 kPa = 1 bar).
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 14525:2022
01-november-2022
Nadomešča:
SIST EN 14525:2005
Spojke in prirobnične prilagoditve široke uporabe za cevi iz različnih materialov:
duktilne litine, sive litine, jekla, PVC-U, PVC-O, PE, vlaknatega cementa
Ductile iron and steel wide tolerance couplings and flange adaptors for use with pipes of
different materials: ductile iron, Grey iron, steel, PVC-U, PVC-O, PE, fibre-cement
Großbereichskupplungen und Flanschadapter aus duktilem Gusseisen und Stahl zur
Verbindung von Rohren aus unterschiedlichen Werkstoffen: duktiles Gusseisen,
Grauguss, Stahl, PVC-U, PVC-O, PE, Faserzement
Manchons et adaptateurs de brides à larges tolérances en fonte ductile et acier destinés
à être utilisés avec des tuyaux faits de différents matériaux : fonte ductile, fonte grise,
acier, PVC-U, PVC-O, PE, fibre-ciment
Ta slovenski standard je istoveten z: EN 14525:2022
ICS:
23.040.10 Železne in jeklene cevi Iron and steel pipes
23.040.60 Prirobnice, oglavki in spojni Flanges, couplings and joints
elementi
SIST EN 14525:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST EN 14525:2022
---------------------- Page: 2 ----------------------
SIST EN 14525:2022
EN 14525
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2022
EUROPÄISCHE NORM
ICS 23.040.60 Supersedes EN 14525:2004
English Version
Ductile iron and steel wide tolerance couplings and flange
adaptors for use with pipes of different materials: ductile
iron, Grey iron, steel, PVC-U, PVC-O, PE, fibre-cement
Manchons et adaptateurs de brides à larges tolérances Großbereichskupplungen und Flanschadapter aus
en fonte ductile et acier destinés à être utilisés avec des duktilem Gusseisen und Stahl zur Verbindung von
tuyaux faits de différents matériaux : fonte ductile, Rohren aus unterschiedlichen Werkstoffen: duktiles
fonte grise, acier, PVC-U, PVC-O, PE, fibre-ciment Gusseisen, Grauguss, Stahl, PVC-U, PVC-O, PE,
Faserzement
This European Standard was approved by CEN on 8 August 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, 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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14525:2022 E
worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 14525:2022
EN 14525:2022 (E)
Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 6
3 Terms and definitions . 6
4 Technical requirements . 10
4.1 General .10
4.1.1 Diameter range . 10
4.1.2 Surface condition and repairs . 10
4.1.3 Types of joints and interconnection . 11
4.1.4 Materials in contact with water intended for human consumption . 11
4.2 Dimensional requirements .12
4.2.1 Minimum wall thickness of ductile iron couplings and flange adaptors . 12
4.2.2 Minimum wall thickness of steel couplings and flange adaptors . 12
4.2.3 Joint gap and depth of engagement . 13
4.2.4 Angular deflection . 14
4.3 Material characteristics .14
4.3.1 Ductile iron . 14
4.3.2 Mild steel for couplings and flange adaptors (DN600 to DN800 only) . 14
4.3.3 Fastener for couplings and flange adaptors . 15
4.4 Coatings .15
4.5 Product information .15
4.5.1 Marking requirements. 15
4.5.2 Additional information . 16
4.6 Water tightness .16
4.6.1 Couplings and flange adaptors . 16
4.6.2 Joints . 16
5 Performance requirements for joints . 16
5.1 General .16
5.2 Pressure rating .17
5.3 Water tightness of flexible joints .17
5.3.1 General – performance tests principles . 17
5.3.2 Test conditions. 17
5.4 Restrained flexible joints .18
5.5 Long term hydrostatic strength test .21
5.5.1 PE pipes . 21
5.5.2 Pull out test at 25 °C for PE restrained joints . 21
5.5.3 PVC pipes . 22
5.6 Flanged joints .22
6 Test methods . 22
6.1 Tensile testing .22
2
---------------------- Page: 4 ----------------------
SIST EN 14525:2022
EN 14525:2022 (E)
6.1.1 Samples .2 2
6.1.2 Preparation of test bar .2 3
6.1.3 Apparatus and test method .2 3
6.1.4 Test results .2 3
6.2 Brinell hardness . 24
6.3 Routine water tightness test . 24
6.3.1 General.2 4
6.3.2 Air test .2 4
6.3.3 Hydrostatic pressure test .2 4
7 Performance tests . 24
7.1 Positive internal pressure joint water tightness . 24
7.1.1 Coupling .2 4
7.1.2 Flange adaptor .2 5
7.2 Negative internal pressure joint . 26
7.3 Dynamic internal pressure joint water tightness . 26
7.4 Long term hydrostatic strength test for joints for PE pipes . 27
7.4.1 Test piece .2 7
7.4.2 Test procedure .2 7
7.5 Pull out test at 25 °C for restrained joints for PE pipes . 27
7.5.1 Test assembly .2 7
7.5.2 Apparatus .2 7
7.5.3 Test procedure .2 7
7.6 Long term hydrostatic strength test for joints of fittings for PVC pipe . 28
7.6.1 Test piece .2 8
7.6.2 Test procedure .2 8
Annex A (informative) Outside diameters of existing pipes . 29
Annex B (informative) Quality assurance . 32
B.1 General . 32
B.2 Performance test . 32
B.3 Manufacturing process . 33
Bibliography . 34
3
---------------------- Page: 5 ----------------------
SIST EN 14525:2022
EN 14525:2022 (E)
European foreword
This document (EN 14525:2022) has been prepared by Technical Committee CEN/TC 203 “Cast iron
pipes, fittings and accessories”, 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 April 2023, and conflicting national standards shall be
withdrawn at the latest by April 2023.
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 14525:2004.
The significant changes made since the previous edition EN 14525:2004 are:
— allowance of steel as material (as EN 12842);
— introduction of type test for pipes made from ductile iron in delivery conditions;
— introduction of long-term testing for pipes made from PVC-U and PE (as per EN 12842);
— correction on pressure testing depending on pipe material (as per EN 12842);
— wording and paragraphs harmonized with EN 12842 and EN 545.
This document is in conformity with the general requirements already established by CEN/TC 164 in the
field of water supply.
In respect of potential adverse effects on the quality of water intended for human consumption caused
by the product covered by this document:
— this document provides no information as to whether the product may be used without restriction
in any of the member states of the EU or EFTA;
— it should be noted that, while awaiting the adoption of verifiable European criteria, existing national
regulations concerning the use and/or the characteristics of these products remain in force.
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.
4
---------------------- Page: 6 ----------------------
SIST EN 14525:2022
EN 14525:2022 (E)
1 Scope
This document specifies the requirements and associated test methods applicable to wide tolerance
ductile iron and steel (restricted sizes for steel) couplings, stepped/reducing couplings and flange
adaptors intended for use with pipe components made from a number of pipe materials (ductile iron,
grey iron, PE in conformity with EN 12201-1 to EN 12201-5, PVC-U in conformity with EN ISO 1452-1 to
EN ISO 1452-5, PVC-O in conformity with EN 17176-1 to EN 17176-5, steel, fibre-cement), for providing
a leak tight seal over a wide range of pipe outside diameters:
— to convey water (e.g. water intended for human consumption);
— with or without pressure;
— to be installed below or above ground, inside or outside buildings.
This document is not intended to cover sewerage or gas applications, where additional requirements may
be necessary.
This document specifies requirements for materials, dimensions and tolerances, mechanical properties
and standard coatings of products.
This document covers wide tolerance couplings, stepped/reducing couplings and flange adaptors:
— manufactured with socketed or flanged ends;
— supplied externally and internally coated;
— suitable for pipes made from ductile iron in conformity with EN 545, grey iron, PE in conformity with
EN 12201-1 to EN 12201-5, PVC-U in conformity with EN ISO 1452-1 to EN ISO 1452-5, PVC-O in
conformity with EN 17176-1 tot EN 17176-5, steel, fibre-cement in a size range extending from
DN 40 to DN 800, for an allowable operating pressure (PFA) up to 16 bar, for fluid temperatures
between 0 °C and 25 °C excluding frost. For higher temperatures, (up to 45 °C for PVC-U and PVC-O
or 40 °C for PE) the PFA is derated as given in EN ISO 1452 and EN 12201;
— not intended for use in areas subjected to reaction to fire regulations.
NOTE 1 This does not preclude special arrangements for the products to be used at higher temperatures.
Temperature limitations and pressure limitations are those coming from the PVC-U, PVC-O or PE pipes.
This document covers ductile iron couplings, stepped/reducing couplings and flange adaptors cast by any
type of foundry process or manufactured by fabrication of cast components, as well as corresponding
joints, in a size range extending from DN 40 to DN 800.
As long as no equivalent European Standard exists for steel accessories, this document also covers
couplings and flange adaptors which are fabricated partly or entirely from steel as well as corresponding
joints, in a size range extending from DN 600 to DN 800.
This document specifies requirements for materials, dimensions and tolerances, mechanical properties
and standard coatings. It also gives minimum performance requirements for all components, including
restrained and non-restrained flexible joints. Joint design and gasket shapes are outside the scope of this
document.
NOTE 2 PFA can be limited depending on pipe materials effectively connected.
NOTE 3 In this document, if not specified, all pressures are relative gauge pressures, expressed in bars
(100 kPa = 1 bar).
5
---------------------- Page: 7 ----------------------
SIST EN 14525:2022
EN 14525:2022 (E)
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 545, Ductile iron pipes, fittings, accessories and their joints for water pipelines — Requirements and test
methods
EN 681-1, Elastomeric seals — Materials requirements for pipe joint seals used in water and drainage
applications — Part 1: Vulcanized rubber
EN 805, Water supply — Requirements for systems and components outside buildings
EN 1092-2, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN
designated — Part 2: Cast iron flanges
EN 10025-1:2004, Hot rolled products of structural steels — Part 1: General technical delivery conditions
EN 10310, Steel tubes and fittings for onshore and offshore pipelines — Internal and external polyamide
powder based coatings
EN 14901-1, Ductile iron pipes, fittings and accessories — Requirements and test methods for organic
coatings of ductile iron fittings and accessories — Part 1: Epoxy coating (heavy duty)
EN 15189, Ductile iron pipes, fittings and accessories — External polyurethane coating for pipes —
Requirements and test methods
EN 15655-1, Ductile iron pipes, fittings and accessories — Requirements and test methods for organic
linings of ductile iron pipes and fittings — Part 1: Polyurethane lining of pipes and fittings
EN ISO 4016, Hexagon head bolts — Product grade C (ISO 4016)
EN ISO 4034, Hexagon regular nuts (style 1) — Product grade C (ISO 4034)
EN ISO 6506-1, Metallic materials — Brinell hardness test — Part 1: Test method (ISO 6506-1)
EN ISO 6892-1, Metallic materials — Tensile testing — Part 1: Method of test at room temperature
(ISO 6892-1)
EN ISO 7091, Plain washers — Normal series — Product grade C (ISO 7091)
EN ISO 11177, Vitreous and porcelain enamels — Inside and outside enamelled valves and pressure pipe
fittings for untreated and potable water supply — Quality requirements and testing (ISO 11177)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/ui
— IEC Electropedia: available at https://www.electropedia.org/
6
---------------------- Page: 8 ----------------------
SIST EN 14525:2022
EN 14525:2022 (E)
3.1
ductile iron
cast iron used for pipes, fittings and accessories in which graphite is present substantially in spheroidal
form
3.2
fitting and accessory
casting or manufactured steel component other than a pipe which allows pipeline deviation, change of
direction or bore
Note 1 to entry: Flanged-socket pieces, flanged spigot pieces are also classified as fittings (EN 545) as far as their
dimension are defined in EN 545. As they have no dimensional requirement in EN 545 couplings, stepped/reducing
couplings and flange adaptors are defined as accessories in EN 545.
3.3
flange
end of a pipe or fitting extending perpendicular to its axis, with bolt holes equally spaced on a circle
Note 1 to entry: A flange may be fixed (e.g. integrally cast or welded-on) or adjustable; an adjustable flange
comprises a ring, in one or several parts assembled together, which bears on an end joint hub and can be freely
rotated around the axis before jointing. See EN 545.
3.4
spigot
male end of a pipe or fitting
3.5
socket
female end of a pipe or fitting to make the connection with the spigot of the next component
3.6
gasket
sealing component of a joint
3.7
joint
connection between the ends of two pipes and/or fittings in which a gasket is used to effect a seal
3.8
flexible joint
joint which permits significant angular deflection both during and after installation and which can accept
a slight offset of the centreline
3.9
push-in flexible joint
flexible joint assembled by pushing the spigot through the gasket in the socket of the mating component
3.10
mechanical flexible joint
flexible joint in which sealing is obtained by applying pressure to the gasket by mechanical means, e.g. a
gland
7
---------------------- Page: 9 ----------------------
SIST EN 14525:2022
EN 14525:2022 (E)
3.11
restrained flexible joint
flexible joint in which a means is provided to prevent axial separation of the assembled joint
3.12
flanged joint
joint between two flanged ends
3.13
joint angular deflection
angle between the axis of two connected pipeline components which a flexible joint can accommodate
3.14
joint gap/ withdrawal
axial distance between any point of the spigot ends of the pipes to be connected, when aligned (couplings,
stepped/reducing couplings), or, axial distance between any point of the spigot end of the pipe and the
flange face, when aligned (flange adaptor)
Note 1 to entry: See also 4.2.3. The word joint gap is used for accessories where withdrawal is used for socketed
pipes as per EN 545.
3.15
depth of engagement
when jointed, the distance between the end of the spigot and the face of the socket on a coupling,
stepped/reducing couplings and flange adaptors
Note 1 to entry: See also 4.2.3.
3.16
outside diameter
OD
nominal outside diameter of the pipe(s) to be connected and current designation of PVC-U and PE
diameter designation
3.17
nominal size
DN
alphanumerical designation of size for components of a pipework system, which is used for reference
purposes
Note 1 to entry: it comprises the letters DN followed by a dimensionless whole number which is indirectly related
to the physical size, in millimetres, of the bore or outside diameter of the end connections.
Note 2 to entry: See EN ISO 6708.
3.18
nominal pressure
PN
alphanumerical designation used for reference purposes related to a combination of mechanical and
dimensional characteristics of a component of a pipework system
Note 1 to entry: It comprises the letters PN followed by a dimensionless number. (See EN 1333.)
Note 2 to entry: All equipment of the same nominal size DN designated by the same PN number have compatible
mating dimensions.
8
---------------------- Page: 10 ----------------------
SIST EN 14525:2022
EN 14525:2022 (E)
3.19
Water tightness test pressure
pressure applied to a component during manufacture in order to ensure its water tightness
3.20
allowable operating pressure
PFA
maximum hydrostatic pressure that a component is capable of withstanding continuously in service
Note 1 to entry: See EN 805.
Note 2 to entry: In EN ISO 1452 and EN 12201, the term nominal pressure (PN) at 20 °C is used in place of PFA.
3.21
allowable maximum operating pressure
PMA
maximum pressure occurring from time to time, including surge, that a component is capable of
withstanding in service
Note 1 to entry: See EN 805.
3.22
allowable test pressure
PEA
maximum hydrostatic pressure that a newly installed component is capable of withstanding for a
relatively short duration, in order to insure the integrity and tightness of the pipeline
Note 1 to entry: See EN 805.
3.23
performance test
proof of design test which is done once and is repeated after change of design or change of elastomeric
or plastic components (source or grade)
3.24
wide tolerance flange adaptor
accessory intended for use with pipes of various materials which:
— is used in a pipeline to make the connection with a spigot of a pipe or a fitting and the flange of
another component of the pipeline (e.g. pipe, fitting, valve, etc.); and
— allows for angular and axial displacements for unrestrained joints and angular displacements for
restrained flexible joints
Note 1 to entry: Some flange adaptors are designed such that they can be slid over the pipes in order to facilitate
easy assembly.
3.25
wide tolerance coupling
accessory intended for use with pipes of various materials which:
— is used in a pipeline to make the connection between two spigots of pipes, fittings or valves, etc. of
the same nominal size; and
9
---------------------- Page: 11 -----
...
SLOVENSKI STANDARD
oSIST prEN 14525:2020
01-september-2020
Spojke in prirobnične prilagoditve široke uporabe za cevi iz različnih materialov:
duktilne litine, sive litine (z lamelastim grafitom), jekla, PVC-U, PE, vlaknatega
cementa
Ductile iron wide tolerance couplings and flange adaptors for use with pipes of different
materials: ductile iron, Grey iron, Steel, PVC-U, PE, Fibre-cement
Großbereichskupplungen und -flanschadapter aus duktilem Gusseisen zur Verbindung
von Rohren aus unterschiedlichen Werkstoffen: Duktiles Gusseisen, Grauguss, Stahl,
PVC-U, PE, Faserzement
Adaptateurs de brides et manchons a larges tolérances en fonte ductile destinés a etre
utilisés avec des tuyaux faits de différents matériaux : fonte ductile, fonte grise, acier,
PVC-U, PE, fibre-ciment
Ta slovenski standard je istoveten z: prEN 14525
ICS:
23.040.10 Železne in jeklene cevi Iron and steel pipes
23.040.60 Prirobnice, oglavki in spojni Flanges, couplings and joints
elementi
oSIST prEN 14525:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
oSIST prEN 14525:2020
---------------------- Page: 2 ----------------------
oSIST prEN 14525:2020
DRAFT
EUROPEAN STANDARD
prEN 14525
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2020
ICS 23.040.60 Will supersede EN 14525:2004
English Version
Ductile iron wide tolerance couplings and flange adaptors
for use with pipes of different materials: ductile iron, Grey
iron, Steel, PVC-U, PE, Fibre-cement
Großbereichskupplungen und -flanschadapter aus
duktilem Gusseisen zur Verbindung von Rohren aus
unterschiedlichen Werkstoffen: Duktiles Gusseisen,
Grauguss, Stahl, PVC-U, PE, Faserzement
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 203.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 14525:2020 E
worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
oSIST prEN 14525:2020
prEN 14525:2020 (E)
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 5
3 Terms and definitions . 6
4 Technical requirements . 9
4.1 General . 9
4.2 Dimensional requirements .11
4.3 Material Characteristics .14
4.4 Coatings .15
4.5 Product information .15
4.6 Leak tightness .16
5 Performance requirements for joints .16
5.1 General .16
5.2 Pressure rating .17
5.3 Leak tightness of flexible joints .17
5.4 Restrained flexible joints .18
5.5 Long term hydrostatic strength test .21
5.6 Flanged joints .22
6 Test methods .23
6.1 Tensile testing .23
6.2 Brinell hardness .24
6.3 Works leak tightness test .24
7 Performance tests .24
7.1 Leak tightness of joints to positive internal pressure.24
7.2 Leak tightness of joints to negative internal pressure .26
7.3 Leak tightness of joints to dynamic internal pressure .26
7.4 Long term hydrostatic strength test for joints for PE pipes .27
7.5 Pull out test at 25 ºC for restrained joints for PE pipes .27
7.6 Long term hydrostatic strength test for joints of fittings for PVC-U pipe.28
Annex A (informative) Outside diameters of existing pipes.29
Annex B (informative) Quality assurance .31
Bibliography .32
2
---------------------- Page: 4 ----------------------
oSIST prEN 14525:2020
prEN 14525:2020 (E)
European foreword
This document (prEN 14525:2020) has been prepared by Technical Committee CEN/TC 203 “Cast iron
pipes, fittings and accessories”, the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 14525:2004.
The significant changes made since the previous version are:
— Allowance of steel as material (as EN 12842);
— Introduction of type test for ductile iron in delivery conditions;
— Introduction of long term testing for PVC-U and PE (as per EN 12842);
— Correction on pressure testing depending on pipe material (as per EN 12842);
— Wording and paragraphs harmonized with EN 12842 and EN 545.
This document is in conformity with the general requirements already established by CEN/TC 164 in the
field of water supply.
In respect of potential adverse effects on the quality of water intended for human consumption caused
by the product covered by this document:
— this document provides no information as to whether the product may be used without restriction
in any of the member states of the EU or EFTA;
— it should be noted that, while awaiting the adoption of verifiable European criteria, existing national
regulations concerning the use and/or the characteristics of these product remain in force.
3
---------------------- Page: 5 ----------------------
oSIST prEN 14525:2020
prEN 14525:2020 (E)
1 Scope
This document specifies the requirements and associated test methods applicable to wide tolerance
ductile iron and steel couplings, stepped/reducing couplings and flange adaptors intended for use with
pipe components made from a number of pipe materials (ductile iron, grey iron, PE in conformity with
EN 12201-1 to EN 12201-5, PVC-U in conformity with EN ISO 1452-1 to EN ISO 1452-5, steel, fibre-
cement), for providing a leak tight seal over a wide range of pipe outside diameters:
— to convey water (e.g. water intended for human consumption );
— with or without pressure;
— to be installed below or above ground, inside or outside buildings.
This document is not intended to cover sewerage or gas applications, where additional requirements may
be necessary.
This document specifies requirements for materials, dimensions and tolerances, mechanical properties
and standard coatings of products.
This document covers wide tolerance couplings, stepped/reducing couplings and flange adaptors:
— Manufactured with socketed or flanged ends;
— Supplied externally and internally coated;
— Suitable for ductile iron in conformity with EN 545, grey iron, PE in conformity with EN 12201-1 to
EN 12201-5, PVC-U in conformity with EN ISO 1452-1 to EN ISO 1452-5, steel, fibre-cement in a size
range extending from DN 40 to DN 700, for an allowable operating pressure (PFA) up to 16 bar, for
fluid temperatures between 0 °C and 25 °C excluding frost. For higher temperatures, (up to 45 °C for
PVC-U or 40 °C for PE) the PFA is derated as given in EN ISO 1452 and EN 12201;
— Not intended for use in areas subjected to reaction to fire regulations.
NOTE 1 This does not preclude special arrangements for the products to be used at higher temperatures.
Temperature limitations and pressure limitations are those coming from the PVC-U or PE pipes.
This document covers ductile iron couplings, stepped/reducing couplings and flange adaptors cast by any
type of foundry process or manufactured by fabrication of cast components, as well as corresponding
joints, in a size range extending from DN 40 to DN 700, to be used with pipes of external diameter from
40 mm to 710 mm.
As long as no equivalent European Standard exists for steel accessories, this document also covers
couplings and flange adaptors which are fabricated partly or entirely from steel as well as corresponding
joints, in a size range extending from DN 60 to DN 700, to be used with pipes of external diameter from
63 mm to 710 mm.
This document specifies requirements for materials, dimensions and tolerances, mechanical properties
and standard coatings. It also gives minimum performance requirements for all components, including
restrained and non-restrained flexible joints. Joint design and gasket shapes are outside the scope of this
document.
NOTE 2 PFA can be limited depending on pipe materials effectively connected.
NOTE 3 In this document, if not specified, all pressures are relative gauge pressures, expressed in bars
(100 kPa = 1 bar).
4
---------------------- Page: 6 ----------------------
oSIST prEN 14525:2020
prEN 14525:2020 (E)
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 545, Ductile iron pipes, fittings, accessories and their joints for water pipelines - Requirements and test
methods
EN 681-1, Elastomeric seals - Materials requirements for pipe joint seals used in water and drainage
applications - Part 1: Vulcanized rubber
EN 805, Water supply - Requirements for systems and components outside buildings
EN 1092-2, Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN
designated - Part 2: Cast iron flanges
EN 1514 (all parts), Flanges and their joints - Dimensions of gaskets for PN-designated flanges.
EN 10025-1:2004, Hot rolled products of structural steels - Part 1: General technical delivery conditions
EN 10310, Steel tubes and fittings for onshore and offshore pipelines - Internal and external polyamide
powder based coatings
EN 12201 (all parts), Plastics piping systems for water supply, and for drainage and sewerage under
pressure - Polyethylene (PE)
EN 14901-1, Ductile iron pipes, fittings and accessories - Requirements and test methods for organic
coatings of ductile iron fittings and accessories - Part 1: Epoxy coating (heavy duty)
EN 15189, Ductile iron pipes, fittings and accessories - External polyurethane coating for pipes -
Requirements and test methods
EN 15655-1, Ductile iron pipes, fittings and accessories - Requirements and test methods for organic
linings of ductile iron pipes and fittings - Part 1: Polyurethane lining of pipes and fittings
EN ISO 1452(all parts), Plastic piping systems for water supply and for buried and above-ground drainage
and sewerage under pressure - Unplasticized poly(vinyl chloride) (PVC-U)
EN ISO 4016, Hexagon head bolts - Product grade C (ISO 4016)
EN ISO 4034, Hexagon regular nuts (style 1) - Product grade C (ISO 4034)
EN ISO 6506-1, Metallic materials - Brinell hardness test - Part 1: Test method (ISO 6506-1)
EN ISO 6892-1, Metallic materials - Tensile testing - Part 1: Method of test at room temperature (ISO
6892-1)
EN ISO 7091, Plain washers - Normal series - Product grade C (ISO 7091)
EN ISO 11177, Vitreous and porcelain enamels - Inside and outside enamelled valves and pressure pipe
fittings for untreated and potable water supply - Quality requirements and testing (ISO 11177)
5
---------------------- Page: 7 ----------------------
oSIST prEN 14525:2020
prEN 14525:2020 (E)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• ISO Online browsing platform: available at https://www.iso.org/obp
• IEC Electropedia: available at http://www.electropedia.org/
3.1
ductile iron
cast iron used for pipes, fittings and accessories in which graphite is present substantially in spheroidal
form
3.2
fitting and accessory
casting or manufactured steel component other than a pipe which allows pipeline deviation, change of
direction or bore
Note 1 to entry: Flanged-socket pieces, flanged spigot pieces are also classified as fittings (EN 545) as far as their
dimension are defined in EN 545. As they have no dimensional requirement in EN 545 couplings, stepped/reducing
couplings and flange adaptors are defined as accessories in EN 545.
3.3
flange
end of a pipe or fitting extending perpendicular to its axis, with bolt holes equally spaced on a circle
Note 1 to entry: A flange may be fixed (e.g. integrally cast or welded-on) or adjustable; an adjustable flange
comprises a ring, in one or several parts assembled together, which bears on an end joint hub and can be freely
rotated around the axis before jointing. See EN 545.
3.4
spigot
male end of a pipe or fitting
3.5
socket
female end of a pipe or fitting to make the connection with the spigot of the next component
3.6
gasket
sealing component of a joint
3.7
joint
connection between the ends of two pipes and/or fittings in which a gasket is used to effect a seal
3.8
flexible joint
joint which permits significant angular deflection both during and after installation and which can accept
a slight offset of the centreline
6
---------------------- Page: 8 ----------------------
oSIST prEN 14525:2020
prEN 14525:2020 (E)
3.9
push-in flexible joint
flexible joint assembled by pushing the spigot through the gasket in the socket of the mating component
3.10
mechanical flexible joint
flexible joint in which sealing is obtained by applying pressure to the gasket by mechanical means, e.g. a
gland
3.11
restrained flexible joint
flexible joint in which a means is provided to prevent axial separation of the assembled joint
3.12
flanged joint
joint between two flanged ends
3.13
joint angular deflection
angle between the axis of two connected pipeline components which a flexible joint can accommodate
3.14
joint gap/ withdrawal
axial distance between any point of the spigot ends of the pipes to be connected, when aligned (couplings,
stepped/reducing couplings), or, axial distance between any point of the spigot end of the pipe and the
flange face, when aligned (flange adaptor)
Note 1 to entry: See also 4.2.3. The word joint gap is used for accessories where withdrawal is used for socketed
pipes as per EN 545.
3.15
depth of engagement
when jointed, the distance between the end of the spigot and the face of the socket on a couplings,
stepped/reducing couplings and flange adaptors
Note 1 to entry: See also 4.2.3.
3.16
outside diameter
OD
outside diameter of the pipe(s) to be connected and current designation of PVC-U and PE diameter
designation
3.17
nominal size
DN
alphanumerical designation of size for components of a pipework system, which is used for reference
purposes
Note 1 to entry: It comprises the letters DN followed by a dimensionless whole number which is indirectly related
to the physical size, in millimetres, of the bore or outside diameter of the end connections.
Note 2 to entry: See EN ISO 6708.
7
---------------------- Page: 9 ----------------------
oSIST prEN 14525:2020
prEN 14525:2020 (E)
3.18
nominal pressure
PN
alphanumerical designation used for reference purposes related to a combination of mechanical and
dimensional characteristics of a component of a pipework system
Note 1 to entry: It comprises the letters PN followed by a dimensionless number. (See EN 1333.)
Note 2 to entry: All equipment of the same nominal size DN designated by the same PN number have compatible
mating dimensions.
3.19
leak tightness test pressure
pressure applied to a component during manufacture in order to ensure its leak tightness
3.20
allowable operating pressure
PFA
maximum hydrostatic pressure that a component is capable of withstanding continuously in service
Note 1 to entry: See EN 805.
Note 2 to entry: In EN ISO 1452 and EN 12201, the term nominal pressure (PN) at 20 °C is used in place of PFA.
3.21
allowable maximum operating pressure
PMA
maximum pressure occurring from time to time, including surge, that a component is capable of
withstanding in service
Note 1 to entry: See EN 805.
3.22
allowable test pressure
PEA
maximum hydrostatic pressure that a newly installed component is capable of withstanding for a
relatively short duration, in order to insure the integrity and tightness of the pipeline
Note 1 to entry: See EN 805.
3.23
performance test
proof of design test which is done once and is repeated after change of design or change of elastomeric
or plastic components (source or grade)
3.24
wide tolerance flange adaptor
accessory intended for use with pipes of various materials which:
— is used in a pipeline to make the connection with a spigot of a pipe or a fitting and the flange of
another component of the pipeline (e.g. pipe, fitting, valve, etc.); and
— allows for angular and axial displacements for unrestrained joints and angular displacements for
restrained flexible joints
8
---------------------- Page: 10 ----------------------
oSIST prEN 14525:2020
prEN 14525:2020 (E)
Note 1 to entry: Some flange adaptors are designed such that they can be slid over the pipes in order to facilitate
easy assembly.
3.25
wide tolerance coupling
accessory intended for use with pipes of various materials which:
— is used in a pipeline to make the connection between two spigots of pipes, fittings or valves, etc. of
the same nominal size; and
— allows for angular and axial displacements for unrestrained joints and angular displacements for
restrained flexible joints
3.26
wide tolerance stepped or reducer coupling
wide tolerance coupling intended for use with pipeline components of different nominal sizes
3.27
annulus gap
gap between the sealing surfaces of the gasket chamber and of the outside diameter of the pipe that is
inserted into the socket of the coupling, stepped / reducing coupling or flange adaptor
4 Technical requirements
4.1 General
4.1.1 Diameter range
The diameter range of wide tolerance couplings and flange adaptors is defined by the maximum and
minimum outside diameters of the pipes to be connected. Within this diameter range the performance
shall be guaranteed at the Manufacturers declared PFA.
The preferred PFA's are 6 bars, 10 bars and 16 bars.
The minimum diameter range of wide tolerance couplings and flange adaptors is given in Table 1.
NOTE The diameter range of wide tolerance couplings, stepped/reducing couplings and flange adaptors is
applicable to the accessory and is not to be confused with the diameter tolerances of the pipes.
Table 1 — Minimum diameter range
Maximum OD or DN of the pipes Minimum
to be connected diameter range
OD (mm) DN (mm)
OD ≤ 110 DN ≤ 100 10
110 < OD ≤ 225 100
225 < OD ≤ 315 200 < DN ≤ 300 20
315 < OD ≤ 400 300 < DN ≤ 400 25
400 < OD ≤ 710 400 < DN ≤ 700 30
The working range defined by the minimum and the maximum outside diameter range shall be specified
by the manufacturer.
9
---------------------- Page: 11 ----------------------
oSIST prEN 14525:2020
prEN 14525:2020 (E)
Informative Annex A gives the outside diameters of existing pipes, according to current ISO, EN or
national standards.
4.1.2 Surface condition and repairs
Wide tolerance couplings, stepped / reducing couplings and wide tolerance flange adaptors shall be free
from defects and surface imperfections which could lead to non-compliance with Clauses 4 and 5.
When necessary, couplings, stepped / reducing couplings and wide tolerance flange adaptors may be
repaired, for example by welding, in order to remove surface imperfections and localised defects which
do not extend through the entire wall thickness, provided that:
— the repairs are carried out according to the manufacturer’s written procedure;
— the repaired couplings and flange adaptors comply with all the requirements of Clauses 4 and 5.
4.1.3 Types of joints and interconnection
4.1.3.1 General
Rubber gasket materials shall comply with the requirements of EN 681-1 for the type WA.
4.1.3.2 Flexible joints
Flexible joints, restrained or non-restrained, shall meet the performance requirements detailed in
Clause 5.
The manufacturer shall declare for which pipe materials restrained joints may be used.
Due to the effect that temperature and pressure has on PE pipe and the associated tensile loads, all joints
intended for use on this pipe material shall be restrained and meet the requirements of 5.4 and 5.5.
Supporting sleeves (inserts) may be necessary depending on pipe material, on pipe wall thickness, on
joint design and on local authorities. They shall provide adequate support over the entire compression
area of the gasket and restraining mechanism.
4.1.3.3 Flanged joints
Flanged joints shall be constructed in such a way that they may be attached to flanges whose dimensions
and tolerances comply with EN 1092-2. This ensures interconnection between all flanged components
(pipes, fittings, valves, etc.) of the same PN and DN and adequate joint performance.
Bolts and nuts shall comply as a minimum with the requirements of EN ISO 4016 and EN ISO 4034, grade
4.6. Where washers are required they shall comply with EN ISO 7091.
Although it does not affect interconnection, the manufacturer shall state whether their products are
normally delivered with fixed flanges or adjustable flanges.
Flange gaskets may be one of any type given in EN 1514 (all parts).
Flanges may be designed to be compatible with different DN (e.g. DN 50-60-65) and/or different PN (e.g.
PN 10/16).
Certain flange adaptors, especially for repair purposes, are designed to cater for flanges other than
EN 1092-2. Consequently, some dimensions (e.g. thickness, bolt holes) may be designed to suit. Such
flange adaptors shall not compromise functionality or compatibility with EN 1092-2 flanges.
4.1.4 Materials in contact with water intended for human consumption
Wide tolerance couplings, stepped / reducing couplings and wide tolerance flange adaptors include
several materials given in this document. When used under the conditions for which they are designed,
in permanent or in temporary contact with water intended for human consumption, wide tolerance
10
---------------------- Page: 12 ----------------------
oSIST prEN 14525:2020
prEN 14525:2020 (E)
couplings, stepped / reducing couplings and wide tolerance flange adaptors shall not change the quality
of that water to such an extent that it fails to comply with the requirements of national regulations.
For this purpose, reference shall be made to the relevant national regulations and standards, transposing
EN standards when available, dealing with the influence of materials on water quality, and to the
requirements for external systems and components as given in EN 805.
4.2 Dimensional requirements
4.2.1 Minimum wall thickness of ductile iron couplings and flange adaptors
The minimum wall thickness of the ductile iron, at any point, shall be as given in Table 2, provided that
the requirements of 4.3, 4.6 and Clause 7 are complied with.
Table 2 — Minimum wall thickness
Maximum OD or DN of the pipes Minimum wall
to be connected thickness
OD (mm) DN (mm)
OD ≤ 225 DN ≤ 200 4,0
225 < OD ≤ 315 200 < DN ≤ 300 5,0
315
NOTE The thickness given in Table 2 is the minimum wall thickness corresponding to the main part of the
body. The actual thickness at any particular point may need to be increased to meet localized high stresses
depending on the shape of the casting (e.g. at internal radius of bends, at the branch-body junction of tees.).
4.2.2 Minimum wall thickness of steel couplings and flange adaptors
When material complies with 4.3.2 the minimum wall thickness of the steel, at any point, shall be as given
in Table 3, provided that the requirements of 4.3, 4.6 and 7 are complied with.
Table 3— Minimum wall thickness of mild steel couplings and flange adaptors
OD Minimum wall thickness
for material grade as
specified in 4.3.2
mm
OD ≤ 315 3,0
315 < OD ≤ 560 4,0
560 < OD ≤ 710 5,0
For higher grade materials it is permissible to use thicknesses less than specified in Table 3 with an
absolute minimum of 3 mm.
11
---------------------- Page: 13 ----------------------
oSIST prEN 14525:2020
prEN 14525:2020 (E)
4.2.3 Joint gap and depth of engagement
The manufacturer shall declare the maximum joint gap for couplings, stepped / reducing couplings and
flange adaptors, see Figure 1, and it shall not be less than the values given in Table 4.
The manufacturer shall declare both the minimum and maximum depth of engagement in the installation
instructions.
The minimum depth of engagement shall be such that:
— the pipes can support the loads imparted by the jointing/anchorage system;
— with full angular deflection and, in the case of non-restrained joints the pipe fully contracted due to
thermal changes, there is no chance of the gasket being forced off the end of the pipe – i.e. the pipe
comes out of the coupling, stepped / reducing coupling or flange adaptor.
The maximum depth of engagement shall be such that:
— with maximum angular deflection and,
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.