SIST EN 13244-3:2003
(Main)Plastics piping systems for buried and above-ground pressure systems for water for general purposes, drainage and sewerage - Polyethylene (PE) - Part 3: Fittings
Plastics piping systems for buried and above-ground pressure systems for water for general purposes, drainage and sewerage - Polyethylene (PE) - Part 3: Fittings
This Part of EN (155wi017) specifies the characteristics of fittings made from polyethylene (PE) intended to be used in the field of buried and above-ground pressure systems for water for general purposes, drainage and sewerage. It also specifies the test parameters for the test methods referred to in this standard.
Kunstoff-Rohrleitungssysteme für erd- und oberirdisch verlegte Druckrohrleitungen für Brauchwasser, Entwässerung und Abwasser - Polyethylen (PE) - Teil 3: Formstücke
Dieser Teil von EN 13244 legt die Anforderungen an Formstücke aus Polyethylen (PE) fest, die für unter- und oberirdisch verlegte Druckrohrleitungen für Brauchwasser, Entwässerung und Abwasser eingesetzt werden. Er gilt auch für Abwasser-Vakuumsysteme.
ANMERKUNG 1 Brauchwasser ist nicht für den menschlichen Gebrauch bestimmt und Rohrleitungsteile, die dieser Norm entsprechen, sollten nicht für die Wasserversorgung für den menschlichen Gebrauch verwendet werden. Rohrleitungsteile aus PE für die Verwendung in der Wasserversorgung für den menschlichen Gebrauch und die Fortleitung von Rohwasser, das zur Aufbereitung von Trinkwasser genutzt wird, siehe EN 12201.
Er legt auch die Prüfparameter für die Prüfverfahren fest, auf die in dieser Norm verwiesen wird.
Zusammen mit den übrigen Teilen der EN 13244 (siehe Vorwort) gilt dieser Teil für Formstücke aus PE, deren Verbindungen untereinander sowie mit Rohrleitungsteilen aus anderen Werkstoffen, die zur Verwendung unter den folgenden Bedingungen vorgesehen sind:
Verlegung im Rohrgraben;
Entwässerung ins Meer (Siele);
Überlandleitungen in Binnengewässern oder in Kanälen;
Düker oder Brückenleitungen;
der maximal zulässige Betriebsdruck MOP beträgt nicht mehr als 25 bar ;
es gilt eine Betriebstemperatur von 20 °C als Bezugstemperatur.
ANMERKUNG 2 Für Anwendungsgebiete, in denen konstante Betriebstemperaturen über 20 °C bis maximal 40 °C auftreten, können Minderungsfaktoren verwendet werden, siehe Anhang A, EN 13244-1:2002.
EN 13244 enthält Festlegungen über maximal zulässige Betriebsdrücke und legt Anforderungen an die Einfärbung von Rohrleitungsteilen sowie die Verwendung von Zusatzstoffen fest.
ANMERKUNG 3 Der Anwender bzw. Auftraggeber ist unter Berücksichtigung der eigenen Anforderungen sowie der geltenden nationalen Empfehlungen oder Festlegungen und Verlegepraktiken für die entsprechende Auswahl dieser Kriterien verantwortlich.
Diese Norm gilt für die folgenden Arten von Formstücken:
a) Schweißv
Systemes de canalisations en plastique pour les applications générales de transport d'eau, de branchement et de collecteurs d'assainissement enterrés sous pression - Polyéthylene (PE) - Partie 3: Raccords
La présente partie de l'EN (155wi017) spécifie les aspects généraux des raccords réalisés en polyéthylene, destinés a etre utilisés dans le domaine des systemes de canalisations en plastique pour des applications générales de transport d'eau, de branchements et de collecteurs d'assainissement, enterrés et aériens sous pression. Elle spécifie également les parametres d'essai pour les méthodes d'essai auxquelles il est fait référence dans la présente normLa présente partie de l'EN 13244 spécifie les aspects généraux des systemes de canalisations en polyéthylene pour les applications générales de transport d'eau, de branchements et de collecteurs d'assainissement enterrés et aériens sous pression. Elle s'applique aussi aux systemes de collecteurs par le vide.
NOTE 1 L'eau pour les applications générales n'est pas destinée a la consommation humaine et il convient que les composants conformes a cette norme ne soient utilisés pour des systemes de transport d'eau pour la consommation humaine. Pour les composants PE destinés au transport de l'eau pour la consommation humaine y compris les eaux brutes avant traitement , voir l'EN 12201.
Elle spécifie également les parametres d'essai pour les méthodes d'essai auxquelles il est fait référence dans la présente norme.
Conjointement aux autres parties de l'EN 13244 (voir avant-propos), elle s'applique aux raccords en PE, a leurs assemblages et aux assemblages avec des composants en PE et en d'autres en matieres destinés a etre utilisés selon les conditions suivantes :
enterrés dans le sol ;
déversoirs en mer ;
posés dans l'eau ;
au dessus du sol, y compris les tubes suspendus sous les ponts ;
a une pression de service maximale, MOP, pouvant atteindre jusqu'a 25 bar ) ;
a une température de service de 20 °C comme température de référence.
NOTE 2 Pour des applications fonctionnant a des températures constantes supérieures a 20 °C et jusqu'a 40 °C, voir l'Annexe A de l'EN 13244-1:2002.
L'EN 13244 comprende.
Cevni sistemi iz polimernih materialov, podzemni in nadzemni, za tlačne vodovode splošne namembnosti, odvodnjavanje in kanalizacijo – Polietilen (PE) - 3. del: Fitingi
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.)LWLQJLKunstoff-Rohrleitungssysteme für erd- und oberirdisch verlegte Druckrohrleitungen für Brauchwasser, Entwässerung und Abwasser - Polyethylen (PE) - Teil 3: FormstückeSystemes de canalisations en plastique pour les applications générales de transport d'eau, de branchement et de collecteurs d'assainissement enterrés sous pression - Polyéthylene (PE) - Partie 3: RaccordsPlastics piping systems for buried and above-ground pressure systems for water for general purposes, drainage and sewerage - Polyethylene (PE) - Part 3: Fittings93.030Zunanji sistemi za odpadno vodoExternal sewage systems23.040.45Fitingi iz polimernih materialovPlastics fittingsICS:Ta slovenski standard je istoveten z:EN 13244-3:2002SIST EN 13244-3:2003en01-oktober-2003SIST EN 13244-3:2003SLOVENSKI
STANDARD
SIST EN 13244-3:2003
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 13244-3December 2002ICS 23.040.45; 93.030English versionPlastics piping systems for buried and above-ground pressuresystems for water for general purposes, drainage and sewerage- Polyethylene (PE) - Part 3: FittingsSystèmes de canalisations en plastique pour lesapplications générales de transport d'eau, de branchementet de collecteurs d'assainissement, enterrés sous pression- Polyéthylène (PE) - Partie 3: RaccordsKunstoff-Rohrleitungssysteme für erd- und oberirdischverlegte Druckrohrleitungen für Brauchwasser,Entwässerung und Abwasser - Polyethylen (PE) - Teil 3:FormstückeThis European Standard was approved by CEN on 16 October 2002.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 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 translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2002 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13244-3:2002 ESIST EN 13244-3:2003
EN 13244-3:2002 (E)2ContentspageForeword.4Introduction.61Scope.72Normative references.83Definitions, symbols and abbreviations.94Material.94.1PE compound.94.2Material for non-polyethylene parts.104.2.1General.104.2.2Metal parts.104.2.3Elastomers.104.2.4Other materials.105General characteristics.105.1Appearance.105.2Design.105.3Colour.105.4Electrical characteristics for electrofusion fittings.115.5Appearance of factory made joints.116Geometrical characteristics.116.1Measurement of dimensions.116.2Dimensions of electrofusion sockets.116.2.1Diameters and lengths of electrofusion sockets.116.2.2Wall thicknesses.136.3Dimensions of spigotted fittings.136.4Dimensions of socket fusion fittings.156.5Socketed pipe.166.5.1Dimensions and tolerances of the socket and length of spigot end.176.5.2Equations for calculating the dimensions of sockets of non-end-load-resistant fittings for usewith pipes up to 6 m lengths.176.6Dimensions of mechanical fittings.176.7Dimensions of loose backing flanges and flange adapters.177Mechanical characteristics.177.1General.177.2Conditioning.177.3Requirements.177.4Retest in case of failure at 80 °C.187.5Pressure drop.198Physical characteristics.198.1Conditioning.198.2Requirements.199Chemical characteristics of fittings in contact with chemicals.2010Sealing rings.2011Performance requirements.2012Marking.2012.1General.20SIST EN 13244-3:2003
EN 13244-3:2002 (E)312.2Minimum required marking of fittings.2112.3Minimum required marking on a label.2112.4Fusion system recognition.2113Packaging.22Annex A (normative)
Socket fusion fittings.23Annex B (informative)
Examples of typical terminal connection for electrofusion fittings.25Bibliography.28SIST EN 13244-3:2003
EN 13244-3:2002 (E)4ForewordThis document (EN 13244-3:2002) has been prepared by Technical Committee CEN/TC 155 "Plastics pipingsystems 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 orby endorsement, at the latest by June 2003, and conflicting national standards shall be withdrawn at the latest byDecember 2004.For components which have conformed to the relevant national standard before December 2002, as shown by themanufacturer or by a certification body, the national standard may continue to be applied until December 2004.It has been prepared in liaison with CEN/TC 165 "Waste water engineering".This European Standard is a Part of a System Standard for plastics piping systems of a particular material for aspecified application. There are a number of such System Standards.System Standards are based on the results of the work being undertaken in ISO/TC 138 "Plastics pipes, fittingsand valves for the transport of fluids", which is a Technical Committee of the International Organization forStandardization (ISO).They are supported by separate standards on test methods to which references are made throughout the SystemStandard.The System Standards are consistent with standards on general functional requirements and standards oninstallation practices.EN 13244 consists of the following Parts, under the general title Plastics piping systems for buried and above-ground pressure systems for water for general purposes, drainage and sewerage — Polyethylene (PE):— Part 1: General— Part 2: Pipes— Part 3: Fittings (this standard)— Part 4: Valves— Part 5: Fitness for purpose of the system— Part 7: Guidance for the assessment of conformity (to be published as a CEN/TS)NOTEIt was decided not to publish a Part 6: Recommended practice for installation. Instead, existing national practiceswould be applicable.This Part of EN 13244 includes the following:— Annex A (normative): Socket fusion fittings;— Annex B (informative): Examples of typical terminal connection for electrofusion fittings;— Bibliography.System Standards for piping systems of other plastics materials used for the conveyance of water, drainage andsewerage include the following:prEN 14364,
Plastics piping systems for pressure and non-pressure drainage and sewerage — Glass-reinforcedthermosetting (GRP) plastics based on polyester resin (UP).SIST EN 13244-3:2003
EN 13244-3:2002 (E)5EN 1456,
Plastics piping systems for buried and above-ground drainage and sewerage under pressure —Unplasticized poly(vinyl chloride) (PVC-U).According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain,Sweden, Switzerland and the United Kingdom.SIST EN 13244-3:2003
EN 13244-3:2002 (E)6IntroductionEN 13244, of which this is Part 3, specifies the requirements for a piping system and its components when madefrom polyethylene (PE), intended to be used for buried and above-ground pressure systems for water for generalpurposes, drainage and sewerage, including vacuum systems.Requirements and test methods for material and components, other than fittings, are specified in EN 13244-1,EN 13244-2 and EN 13244-4. Characteristics for fitness for purpose are covered in EN 13244-5 andprCEN/TS 13244-7 gives guidance for the assessment of conformity.This Part of EN 13244 covers the characteristics of fittings.SIST EN 13244-3:2003
EN 13244-3:2002 (E)71ScopeThis Part of EN 13244 specifies the characteristics of fittings made from polyethylene (PE) intended for buried andabove-ground pressure systems for water for general purposes, drainage and sewerage. It is also applicable forvacuum sewer systems.NOTE 1Water for general purposes is not intended for human consumption and components conforming to this standardshould not be used in systems conveying water for human consumption. For PE components intended for the conveyance ofwater intended for human consumption and raw water prior to treatment, see EN 12201.It also specifies the test parameters for the test methods referred to in this standard.In conjunction with other Parts of EN 13244 (see Foreword), it is applicable to PE fittings, their joints and to jointswith components of PE and other materials intended to be used under the following conditions:— buried in the ground;— sea outfalls;— laid in water;— above-ground, including pipes suspended below bridges;— a maximum operating pressure, MOP, up to and including 25 bar 1);— an operating temperature of 20 °C as a reference temperature.NOTE 2For applications operating at constant temperatures greater than 20 °C and up to 40 °C, see annex A of EN 13244-1:2002.EN 13244 covers a range of maximum operating pressures and gives requirements concerning colours andadditives.NOTE 3It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects, taking intoaccount their particular requirements and any relevant national guidance or regulations and installation practices or codes.These fittings can be of the following types:a)fusion fittings1) butt fusion fittings;2) socket fusion fittings;3) electrofusion fittings.b)
mechanical fittings1) compression fittings.c)
flanged fittings.
1)
1 bar = 105 N/m2.SIST EN 13244-3:2003
EN 13244-3:2002 (E)82Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text, and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies (including amendments).EN 681-1,
Elastomeric seals — Material requirements for pipe joint seals used in water and drainage applications— Part 1: Vulcanized rubber.EN 681-2,
Elastomeric seals — Material requirements for pipe joint seals used in water and drainage applications— Part 2: Thermoplastics elastomers.EN 728,
Plastics piping and ducting systems — Polyolefin pipes and fittings — Determination of oxidationinduction time.EN 921:1994,
Plastics piping systems — Thermoplastics pipes — Determination of resistance to internal pressureat constant temperature.EN 13244-1:2002,
Plastics piping systems for buried and above-ground pressure systems for water for generalpurposes, drainage and sewerage — Polyethylene (PE) — Part 1: General.EN 13244-2:2002,
Plastics piping systems for buried and above-ground pressure systems for water for generalpurposes, drainage and sewerage — Polyethylene (PE) — Part 2: Pipes.EN 13244-5:2002,
Plastics piping systems for buried and above-ground pressure systems for water for generalpurposes, drainage and sewerage — Polyethylene (PE) — Part 5: Fitness for purpose of the system.EN ISO 1133:1999,
Plastics — Determination of the melt-mass flow rate (MFR) and the melt-volume flow rate(MVR) of thermoplastics.prEN ISO 3126:1999,
Plastics piping systems — Plastics piping components — Measurement and determinationof dimensions (revision of prEN 496:1991 and ISO 3126:1974) (ISO/DIS 3126:1999).ISO 4059:1978,
Polyethylene (PE) pipes — Pressure drop in mechanical pipe-jointing systems — Method of testand requirements.ISO 4433-1:1997,
Thermoplastics pipes — Resistance to liquid chemicals — Classification — Part 1: Immersiontest method.ISO 4433-2:1997,
Thermoplastics pipes — Resistance to liquid chemicals — Classification — Part 2: Polyolefinpipes.ISO 9624,
Thermoplastics pipes for fluids under pressure — Mating dimensions of flange adapters and loosebacking flanges.ISO 13953:2001,
Polyethylene (PE) pipes and fittings — Determination of the tensile strength and failure mode oftest pieces from a butt-fused joint.ISO 13954:1997,
Plastics pipes and fittings — Peel decohesion test for polyethylene (PE) electrofusion assembliesof nominal outside diameter greater than or equal to 90 mm.ISO 13955:1997,
Plastics pipes and fittings — Crushing decohesion test for polyethylene (PE) electrofusionassemblies.SIST EN 13244-3:2003
EN 13244-3:2002 (E)93Definitions, symbols and abbreviationsFor the purposes of this European Standard the terms, definitions, symbols and abbreviations given in EN 13244-1together with the following apply.3.1electrofusion socket fittingpolyethylene (PE) fitting which contains one or more integral heating elements, that are capable of transformingelectrical energy into heat to realise a fusion joint with a spigot end or a pipe3.2spigot end fittingpolyethylene (PE) fitting where the outside diameter of the spigot length is equal to the nominal outside diameter,dn, of the corresponding pipe3.3mechanical fittingfitting for assembling polyethylene (PE) pipe to an other PE pipe or any other element of the piping system. Themechanical fitting may be supplied for field assembly or pre-assembled by the manufacturer. The fitting generallyincludes a compression part to provide pressure integrity, leaktightness and resistance to end loads. A supportsleeve inserted into the pipe bore provides a permanent support for the PE pipe to prevent creep in the pipe wallunder radial compressive forcesNOTE 1The metallic parts of the fitting can be assembled to metallic pipes by screw threads, compression joints, welded orflanged connections, including PE flanges. The fitting can allow either a dismountable or permanently assembled joint.NOTE 2In some cases the supporting ring can also act as a grip ring.3.4push-fit fittingfitting which includes one or more integral sealing rings, located in a groove (or grooves) in a preformed socket,which is assembled by inserting a chamfered and lubricated spigot, in an axial direction, past the sealing ring(s), toa recommended depth. Both end-load-resistant and non-end-load-resistant designs are available3.5fabricated fittingfitting produced from pipe conforming to EN 13244-2 and/or from injection moulded fittings conforming to thisstandard3.6voltage regulationcontrol of energy supplied, during the fusion process of an electrofusion fitting, by means of the voltage parameter3.7intensity regulationcontrol of energy supplied, during the fusion process of an electrofusion fitting, by means of the current parameter4Material4.1PE compoundThe PE compound from which the fittings are made shall conform to EN 13244-1.SIST EN 13244-3:2003
EN 13244-3:2002 (E)104.2Material for non-polyethylene parts4.2.1GeneralAll components shall conform to the relevant European Standard(s). Alternative standards may be utilised in caseswhere suitable European Standards do not exist provided a fitness for purpose can be demonstrated.The materials and constituent elements used in making the fitting (including elastomers, greases, and any metalparts) shall be as resistant to the external and internal environments as the other elements of the piping systemand shall have a life expectancy under the following conditions at least equal to that of the PE pipe conforming toEN 13244-2 with which they are intended to be used:a) during storage;b) under the effect of the fluids being conveyed;c) taking account of the service environment and operating conditions.The requirements for the level of material performance for non-polyethylene parts shall be at least as stringent asthat of the PE compound for the piping system.Fittings material in contact with the PE pipe shall not adversely affect the pipe performance or initiate stresscracking.4.2.2Metal partsAll parts susceptible to corrosion shall be adequately protected.When dissimilar metallic materials are used which may be in contact with moisture, steps shall be taken to avoidgalvanic corrosion.4.2.3ElastomersElastomeric materials used for the manufacture of seals shall conform to EN 681-1 or EN 681-2, as applicable.4.2.4Other materialsGreases or lubricants shall not exude on to the fusion areas, and shall not affect the long-term performance of thefitting.5General characteristics5.1AppearanceWhen viewed without magnification, the internal and external surfaces of the fitting shall be smooth, clean and freefrom scoring, cavities and other surface defects to an extent that would prevent conformity of the fitting to thisstandard.5.2DesignThe design of the fitting shall be such that, when assembling the fitting onto the pipe or other components, theelectrical coils and/or seals are not displaced.5.3ColourUnless other colours are specified by national regulations the colour of the PE fittings shall be black.NOTE 1Where national regulations require an alternative colour to black, pipes coloured blue or black with blue stripesshould not be used for this application. The blue colour indicates that the components are suitable for the conveyance of waterintended for human consumption as specified in EN 12201.SIST EN 13244-3:2003
EN 13244-3:2002 (E)11NOTE 2For above ground installations, fittings manufactured in colours other than black compound conforming toEN 13244-1 should be protected from direct UV light.5.4Electrical characteristics for electrofusion fittingsThe electrical protection that shall be provided by the system depends on the voltage and the current strength usedand on the characteristics of the electricity power.For voltages greater than 25 V, direct human contact with the energised parts shall not be possible when the fittingis in the fusion cycle during assembly in accordance with the instructions of the manufacturer of the fittings and theassembly equipment, as applicable.NOTE 1During the fusion process, this type of fitting is a part of an electrical system as defined inEN 60335-1[1], IEC 60364-1[2] and IEC 60449[3]. A protection against direct contacts with active parts (live conductors) isrequired in conformity to EN 60529[4]. This protection is a function of the work site conditions.NOTE 2See annex B for examples of typical electrofusion terminal connectors.The surface finish of the terminal pins shall allow a minimum contact resistance in order to satisfy the resistancetolerance requirements (nominal value ± 10 %).5.5Appearance of factory made jointsThe internal and external surfaces of the pipe and fitting after fusion jointing, examined visually withoutmagnification, shall be free from melt exudation outside the confines of the fitting, apart from that which may bedeclared acceptable by the fitting manufacturer or used as a fusion marker.Any melt exudation shall not cause wire movement in electrofusion fittings such that it leads to short circuiting,when jointed in accordance with the manufacturer’s instructions. There shall be no excessive creasing of theinternal surfaces of the adjoining pipes.6Geometrical characteristics6.1Measurement of dimensionsThe dimensions of the fittings shall be measured in accordance with prEN ISO 3126. In the case of dispute themeasurement of dimensions shall be made not less than 24 h after manufacture after being conditioned for at least4 h at (23 ± 2) °C.6.2Dimensions of electrofusion sockets6.2.1Diameters and lengths of electrofusion socketsWhen measured in accordance with 6.1 the diameters and lengths of electrofusion sockets (see Figure 1) shallconform to Table 1.SIST EN 13244-3:2003
EN 13244-3:2002 (E)12Table 1 — Electrofusion socket dimensionsDimensions in millimetresNominal diameter ofthe fittingDesign depthFusion zoneadnL1,minL1,maxL2,minIntensity regulationVoltage regulation20253240506375901101251401601802002252502803153554004505005606302020202020232528323538424650557381899911012213514716125252525283135405358626874808895104115127140155170188209414144495563707982879298105112120129139150164179195212235255101010101011121315161820212326333539424751566167aIncreased fusion zone lengths are applicable for fittings rated to higher pressures, in order to meet the performancerequirements of this standard.The mean inside diameter of the fitting in the middle of the fusion zone, D1, shall not be less than dn.The manufacturer shall declare the actual maximum and minimum values of D1 and L1 to determine suitability forclamping and joint assembly.In the case of a fitting having sockets of differing sizes, each one shall conform to the requirements for thecorresponding nominal diameter.SIST EN 13244-3:2003
EN 13244-3:2002 (E)13KeyD1is the "mean inside diameter in the fusion zone" measured in a plane parallel to the plane of the mouthat a distance of L3 + 0,5L2;D2is the bore which is the minimum diameter of the flow channel through the body of the fitting whereD2 ³ (dn - 2emin);L1is the "design penetration depth" of the pipe or of the male end of a spigot fitting. In the case of acoupling without a stop, it is not greater than half the total length of the fitting;L2is the heated length within a socket as declared by the manufacturer to be the nominal length of thefusion zone;L3is the distance between the mouth of the fitting and the start of the fusion zone as declared by themanufacturer to be the nominal unheated entrance length of the fitting L3 shall be ³ 5 mm.Figure 1 — Dimensions of electrofusion sockets6.2.2Wall thicknessesThe wall thickness of the body of the fitting at any point, E, shall be equal to or greater than emin for thecorresponding pipe for any part of the fitting located at a distance beyond 2L1/3 from all entrance faces of the fittingwhen the fitting and the corresponding pipe are made from a polyethylene with the same designation. If the fitting isproduced from a polyethylene with an MRS designation different from that of the corresponding pipe, the preferredrelationship between the wall thickness of the fitting, E, and the pipe, emin, shall conform to Table 2.Table 2 — Relationship between pipe and fitting wall thicknessesMaterialPipeFittingRelationship between fitting wallthickness, E, and pipe wallthickness, eminPE 80PE 100E ³ 0,8eminPE 100PE 80E ³ 1,25eminIn order to prevent stress concentrations, any changes in wall thickness of the fitting body shall be gradual.NOTE Fittings conforming to ISO 8085-3 are deemed to satisfy the requirements of this standard.6.3Dimensions of spigotted fittingsWhen measured in accordance with 6.1, the spigot dimensions shall conform Table 3 (see Figure 2).SIST EN 13244-3:2003
EN 13244-3:2002 (E)14Table 3 — Spigot dimensionsDimensions in millimetresMean outside diameter ofthe fusion end aFor electrofusionSocketfusionFor butt fusionTubularlengthTubularlengthNominaloutsidediameterof spigotGradeAGrade BOut-of-round-nessMin.boreCut backlengthTubularlength bTubularlengthOut-of-round-nessCutbacklengthNormal cSpecial ddnD1,minD1,maxD1,maxmax.D2L1,minL2,minL2,minmax.L1,minL2,minL2,min32405063759011012514016018020022525028031535540045050056063032,040,050,063,075,090,0110,0125,0140,0160,0180,0200,0225,0250,0280,0315,0355,0400,0450,0500,0560,0630,0——————————————28
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