SIST EN 14525:2005

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.FHPHQWDGroßbereichskupplungen und -flanschadapter aus duktilem Gusseisen zur Verbindung von Rohren aus unterschiedlichen Werkstoffen: Duktiles Gusseisen, Grauguss, Stahl, PVC-U, PE, FaserzementAdaptateurs 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-cimentDuctile iron wide tolerance couplings and flange adaptors for use with pipes of different materials: ductile iron, Grey iron, Steel, PVC-U PE, Fibre-cement23.040.60Prirobnice, oglavki in spojni elementiFlanges, couplings and joints23.040.10Železne in jeklene ceviIron and steel pipesICS:Ta slovenski standard je istoveten z:EN 14525:2004SIST EN 14525:2005en01-januar-2005SIST EN 14525:2005SLOVENSKI
STANDARD



SIST EN 14525:2005



EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14525November 2004ICS 23.040.10; 23.040.60English versionDuctile iron wide tolerance couplings and flange adaptors foruse with pipes of different materials: ductile iron, Grey iron,Steel, PVC-U PE, Fibre-cementAdaptateurs de brides et manchons à larges tolérances enfonte ductile destinés à être utilisés avec des tuyaux faitsde différents matériaux : fonte ductile, fonte grise, acier,PVC-U, PE, fibre-cimentGroßbereichskupplungen und -flanschadapter aus duktilemGusseisen zur Verbindung von Rohren ausunterschiedlichen Werkstoffen: Duktiles Gusseisen,Gusseisen mit Lamellengraphit, Stahl, PVC-U, PE,FaserzementThis European Standard was approved by CEN on 23 September 2004.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2004 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14525:2004: ESIST EN 14525:2005



EN 14525:2004 (E) 2 Contents Page Foreword.4 Introduction.5 1 Scope.6 2 Normative references.6 3 Terms and definitions.7 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 4.2 Dimensional requirements.12 4.2.1 Wall thickness.12 4.2.2 Joint gap and depth of engagement.12 4.3 Mechanical properties of ductile iron.14 4.3.1 Tensile properties.14 4.3.2 Hardness.14 4.4 Coatings.14 4.4.1 General.14 4.4.2 Coating of ductile iron components.14 4.4.3 Coating of bolts and nuts.14 4.5 Product information.15 4.5.1 Marking requirements.15 4.5.2 Additional information.15 4.6 Leak tightness.15 4.6.1 Couplings and flange adaptors.15 4.6.2 Joints.15 5 Performance requirements for joints.16 5.1 General.16 5.2 Pressure rating.16 5.3 Flexible joints.16 5.3.1 General.16 5.3.2 Angular deflection.16 5.3.3 Test conditions.17 5.3.4 Test parameters.17 5.4 Restrained flexible joints.17 5.5 Flanged joints.19 6 Test methods.19 6.1 Tensile testing.19 6.1.1 Samples.19 6.1.2 Preparation of test bar.19 6.1.3 Apparatus and test method.20 6.1.4 Test results.20 6.2 Brinell hardness.20 6.3 Works leak tightness test.20 6.3.1 General.20 6.3.2 Air test.20 6.3.3 Hydrostatic pressure test.20 7 Performance tests.21 SIST EN 14525:2005



EN 14525:2004 (E)
37.1 Leak tightness of joints to positive internal pressure.21 7.1.1 Coupling.21 7.1.2 Flange adaptor.22 7.2 Leak tightness of joints to negative internal pressure.22 7.3 Leak tightness of joints to dynamic internal pressure.23 Annex A (informative)
Outside diameters of existing pipes.24 Annex B (informative)
Quality assurance.27 Bibliography.28
SIST EN 14525:2005



EN 14525:2004 (E) 4 Foreword This document (EN 14525:2004) 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 May 2005, and conflicting national standards shall be withdrawn at the latest by May 2005. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. SIST EN 14525:2005



EN 14525:2004 (E)
5Introduction This standard 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 standard : a) this standard provides no information as to whether the product may be used without restriction in any of the member states of the EU or EFTA ; b) it should be noted that, while awaiting the adoption of verifiable European criteria, existing national regulations concerning the use and/or the characteristics of this product remain in force. SIST EN 14525:2005



EN 14525:2004 (E) 6 1 Scope This document specifies the requirements and associated test methods applicable to wide tolerance ductile iron couplings and wide tolerance flange adaptors intended for use with pipe components made from a number of pipe materials (ductile iron, grey iron, PE, PVC-U, steel, fibre-cement), for providing a leak tight seal over a wide range of pipe external diameters :  to convey water (e.g. potable water) ;  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 other requirements may be necessary. This document specifies requirements for materials, dimensions and tolerances, mechanical properties and standard coatings of ductile iron products. This standard covers ductile iron products 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 600, 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 50 °C, additional type testing should be carried out. It also gives performance requirements and associated test methods for restrained and non-restrained flexible joints. Joint design and gasket shapes are outside the scope of this standard. NOTE 1 PFA may be limited depending on pipe materials effectively connected. NOTE 2 In this document, all pressures are relative gauge pressures, expressed in bars (100 kPa = 1 bar). NOTE 3 EN 545 gives the specifications for the ductile iron fittings to be used with ductile iron pipes.
NOTE 4 EN 12842 gives the specifications for the ductile iron fittings to be used with PVC-U and PE pipes. 2 Normative references The following referenced documents are indispensable for the application 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 681-1, Elastomeric seals – Material 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 10002-1, Metallic materials – Tensile testing – Part 1 : Method of test at ambient temperature. EN ISO 4016, Hexagon head bolts – Product grade C (ISO 4016:1999). EN ISO 4034, Hexagon nuts – Product grade C (ISO 4034:1999). EN ISO 6506-1, Metallic materials – Brinell hardness test – Part 1 : Test method (ISO 6506-1:1999). EN ISO 7091, Plain washers – Normal series – Product grade C (ISO 7091:2000). SIST EN 14525:2005



EN 14525:2004 (E)
73 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 ductile iron cast iron used for pipes, fittings and accessories in which graphite is present substantially in spheroidal form. 3.2 fitting casting other than a pipe which allows pipeline deviation, change of direction or bore.In addition flanged-socket pieces, flanged spigot pieces and collars are also classified as fittings. 3.3 flange end of a pipe or fitting extending perpendicular to its axis, with bolt holes equally spaced on a circle. NOTE 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 3.11 restrained flexible joint flexible joint in which a means is provided to prevent separation of the assembled joint 3.12 flanged joint joint between two flanged ends SIST EN 14525:2005



EN 14525:2004 (E) 8 3.13 joint angular deflection angle between the axis of two connected pipeline components which a flexible joint can accommodate 3.14 joint gap axial distance between any point of the spigot ends of the pipes to be connected, when aligned (coupling), or, axial distance between any point of the spigot end of the pipe and the flange face, when aligned (flange adaptor) (See also 4.2.2) 3.15 depth of engagement distance between any point of the spigot end and the face of the socket of the coupling or the flange adaptor (See also 4.2.2) 3.16 outside diameter (OD) outside diameter of the pipe(s) to be connected 3.17 nominal size (DN) alphanumerical designation of size for components of a pipework system, which is used for reference purposes. 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. [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. It comprises the letters PN followed by a dimensionless number. [see EN 1333] NOTE 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 [see EN 805] NOTE
In EN 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 [see EN 805] SIST EN 14525:2005



EN 14525:2004 (E)
93.22 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
[see EN 805] NOTE This test pressure is different from the system test pressure (STP), which is related to the design pressure of the pipeline and is intended to ensure its integrity and leak tightness. 3.23 performance test proof of design test which is done once and is repeated only after change of design 3.24 wide tolerance flange adaptor fitting 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 radial and axial displacements NOTE 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 fitting 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. , and,
 allows for radial and axial displacements. NOTE Some couplings are designed such that they can be slid over the pipes in order to facilitate easy assembly. 3.26 wide tolerance stepped or reducer coupling wide tolerance coupling intended for use with pipeline components of different nominal sizes. SIST EN 14525:2005



EN 14525:2004 (E) 10 4 Technical requirements 4.1 General 4.1.1 Diameter range The wide tolerance couplings are defined by the minimum and maximum outside diameters of the pipes to be connected. Within this diameter range, the performance shall be guaranteed at the manufacturer’s declared PFA. The wide tolerance flange adaptors are defined by the DN and the PN of the flange and by the minimum and maximum outside diameters of the pipes to be connected. Within this diameter range, the performance shall be guaranteed at the manufacturer’s declared PFA. The minimum working range of outside diameters for wide tolerance couplings and wide tolerance flange adaptors is given in Table 1. Table 1 – Minimum working diameter range Maximum OD or DN of the pipes to be
connected Minimum working diameter range OD (mm) DN (mm) OD ≤ 110 DN ≤ 100 10 110 < OD ≤ 225 100


EN 14525:2004 (E)
114.1.3 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 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. 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) have been designed to suit. Such flange adaptors shall not compromise functionality or compatibility with EN 1092-2 flanges. NOTE Flange gaskets may be one of those given in EN 1514. 4.1.3.3 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. 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. The manufacturer shall indicate when supporting sleeves are required. 4.1.3.4 Mechanical properties of bolts and nuts Bolts and nuts shall comply as a minimum with the requirements of EN ISO 4016 and EN ISO 4034, grade 4.6. When applicable, washers shall comply with EN ISO 7091. 4.1.3.5 Materials in contact with water intended for human consumption Wide tolerance couplings and wide tolerance flange adaptors include several materials given in this standard. When used under the conditions for which they are designed, in permanent or in temporary contact with water intended for human consumption, wide tolerance 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. NOTE A European Approval Scheme (EAS) is in course of development in relation to the Construction Product Directive and the Drinking Water Directive ; its requirements will be introduced in this standard when completed. SIST EN 14525:2005



EN 14525:2004 (E) 12 4.2 Dimensional requirements 4.2.1 Wall thickness The minimum wall thickness shall be as given in Table 2, provided that they comply to the requirements of 4.6 and of clause 7. Table 2 – Minimum wall thickness Maximum OD or DN of the pipes to be connected Minimum wall thickness OD (mm) DN (mm) OD ≤ 225 DN ≤ 200 4,0 225 < OD ≤ 315 200 < DN ≤ 300 5,0 315 630 300 < DN ≤ 600 6,0 4.2.2 Joint gap and depth of engagement The manufacturer shall declare his maximum allowable joint gap, and it should be not less than the values given in Table 3. NOTE The maximum joint gap between the pipes or the flange to be connected may be affected by pipe contraction or expansion occurring as a result of temperature or pressure change. The depth of engagement is related to the joint design. The manufacturer shall declare the minimum depth of engagement in the jointing instructions for each type of pipe material. The minimum depth of engagement shall be such that the pipes can support the loads imparted by the jointing system. Table 3 – Joint gap Maximum OD or DN of the pipes to be connected Coupling joint gap Flange adaptor joint gap OD (mm) DN (mm) (mm) OD ≤ 110 DN ≤ 100 20 15 110 SIST EN 14525:2005



EN 14525:2004 (E)
13 Key 1 Coupling 2 Depth of engagement 3 Joint gap 4 Joint gasket
Figure 1 – Joint gap for wide tolerance coupling (example)
Key 1 Flange adaptor 2 Depth of engagement 3 Flange face 4 Joint gap
5 Joint gasket
Figure 2 – Joint gap for wide tolerance flange adaptor (example) SIST EN 14525:2005



EN 14525:2004 (E) 14 4.3 Mechanical properties of ductile iron 4.3.1 Tensile properties Ductile iron couplings and flange adaptors shall have a minimum tensile strength, Rm, of 420 MPa and a minimum elongation at fracture of 5 %. The tensile strength shall be tested in accordance with 6.1. 4.3.2 Hardness The Brinell hardness, when measured in accordance with 6.2, shall not exceed 250 HB. For components manufactured by welding, a higher Brinell hardness is allowed in the heat-affected zone of the weld. 4.4 Coatings 4.4.1 General Unless otherwise agreed between manufacturer and purchaser, all couplings and flange adaptors shall be delivered externally and internally coated. The external and internal coatings shall comply with the corresponding EN standards or, where no EN standard exists, they shall comply with ISO standards or with national standards, or with an agreed technical specification. 4.4.2 Coating of ductile iron components Unless otherwise agreed between the manufacturer and the purchaser, one of the coatings listed below shall be used :  epoxy ;  polyamide ;  polyester ;  polyurethane ;  vitreous enamel. Curing shall be sufficient to ensure that it will not stick to adjacent coated pieces. All coatings shall be works-applied. 4.4.3 Coating of bolts and nuts Bolts and nuts shall be suitably protected to inhibit corrosion depending on the external conditions of use. The following coatings may be supplied :  epoxy ;  polyamide ;  zinc based corrosion protection ;  PTFE. SIST EN 14525:2005



EN 14525:2004 (E)
154.5 Product information 4.5.1 Marking requirements All fittings shall be legibly and durably marked and shall bear at least the following information :  manufacturer's name or mark ;  identification of the year of manufacture ;  identification of ductile iron ;  DN and PN rating of flanges when applicable ;  reference to this standard ;  an identification of the minimum and maximum outside diameters (range of external diameters over which the product works) ;  PFA of the coupling or of the flange adaptor. The first five markings given above shall be cast-on or cold stamped ; the other markings can be applied by any method, e.g. painted on the casting or attached to the packaging. 4.5.2 Additional information The following information shall be supplied on or with each product :  maximum joint gap ;  minimum depth of engagement ;  maximum allowable angular deflection ;  pipe materials for which the coupling or the flange adaptor is intended to be used with non-restrained joints, and, if applicable, pipe materi
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