SIST EN 12201-3:2003
(Main)Plastics piping systems for water supply - Polyethylene (PE) - Part 3: Fittings
Plastics piping systems for water supply - Polyethylene (PE) - Part 3: Fittings
This Part of prEN 12201 specifies the characteristics of fittings made from polyethylene (PE) intended for the conveyance of water for human consumption including raw water prior to treatment. It also specifies the test parameters for the test methods referred to in this standard. In conjunction with other Parts of prEN 12201 it is applicable to PE fittings, their joints and to joints with components of PE and other materials intended to be used under the following conditions: a) a maximum operating pressure, MOP, up to and including 25 bar; b) an operating temperature of 20°C as a reference temperature.
Kunststoff-Rohrleitungssysteme für die Wasserversorgung - Polyethylen (PE) - Teil 3: Formstücke
Diese Norm legt Anforderungen an Formstücke aus PE fest, die für die Wasserversorgung für den menschlichen Gebrauch sowie für die Fortleitung von Rohrwasser, das zur Aufbereitung zu Trinkwasser verwendet wird, eingesetzt werden. Sie legt auch die Prüfparameter für die Prüfverfahren fest, auf die in dieser Norm verwiesen wird. Zusammen mit den übrigen Teilen der prEN 12201 gilt dieser Teil für Formstücke aus PE, deren Verbindungen untereinander sowie mit Rohrleitungsteilen aus PE und anderen Werkstoffen, die unter den folgenden Bedingungen für die Wasserversorgung vorgesehen sind: a) der MOP beträgt nicht mehr als 25 bar.
Systemes de canalisations en plastique pour l'alimentation en eau - Polyéthylene (PE) - Partie 3 : Raccords
La présente partie de l'EN 12201 spécifie les caractéristiques des raccords pour les systemes de canalisations en polyéthylene (PE) dans le domaine de l'alimentation en eau destinée a la consommation humaine, y compris le transport des eaux brutes avant traitement.
Elle spécifie également les parametres d'essai pur les méthodes d'essai auxquelles il est fait référence dans la présente norme.
Conjointement aux autres parties du prEN 12201, elle s'applique aux raccords, a leurs assemblages et aux assemblages avec des composants en PE et d'autres matériaux destinés a etre utilisés selon les conditions suivantes :
a) une pression de service maximale, MOP, pouvant atteindre jusqu'a 25 bar ) inclus ;
b) une température de service de 20 °C comme température de référence.
NOTE 1 Pour des applications fonctionnant a des températures constantes supérieures a 20 °C et jusqu'a 40 °C voir l'Annexe A de l'EN 12201-1:2003.
La présente Norme européenne comprend une gamme étendue de pressions de service et spécifie les exigences concernant les couleurs et les additifs.
NOTE 2 Il est de la responsabilité de l'acheteur ou du prescripteur d'effectuer le choix approprié de ces aspects, prenant en compte les exigences particulieres et les regles nationales correspondantes ainsi que les pratiques ou les codes de pose.
Les types de raccords peuvent etre les suivants :
3 raccords soudables :
3 raccords soudables bout a bout ;
3 raccords a emboîture soudables (voir Annexe A) ;
3 raccords électrosoudables ;
3 raccords mécaniques :
3 raccords a compression ;
3 raccords a bride.
Cevni sistemi iz polimernih materialov za oskrbo z vodo - 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.Cevni sistemi iz polimernih materialov za oskrbo z vodo - Polietilen (PE) - 3. del: FitingiKunststoff-Rohrleitungssysteme für die Wasserversorgung - Polyethylen (PE) - Teil 3: FormstückeSystemes de canalisations en plastique pour l'alimentation en eau - Polyéthylene (PE) - Partie 3 : RaccordsPlastics piping systems for water supply - Polyethylene (PE) - Part 3: Fittings91.140.60Sistemi za oskrbo z vodoWater supply systems23.040.45Fitingi iz polimernih materialovPlastics fittingsICS:Ta slovenski standard je istoveten z:EN 12201-3:2003SIST EN 12201-3:2003en01-oktober-2003SIST EN 12201-3:2003SLOVENSKI
STANDARD
SIST EN 12201-3:2003
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12201-3March 2003ICS 23.040.45; 91.140.60English versionPlastics piping systems for water supply - Polyethylene (PE) -Part 3: FittingsSystèmes de canalisations en plastique pour l'alimentationen eau - Polyéthylène (PE) - Partie 3: Aptitude à l'emploiKunststoff-Rohrleitungssysteme für die Wasserversorgung- Polyethylen (PE) - Teil 3: FormstückeThis European Standard was approved by CEN on 4 December 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,Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and UnitedKingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2003 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12201-3:2003 ESIST EN 12201-3:2003
EN 12201-3:2003 (E)2ContentsForeword.4Introduction.51Scope.62Normative references.63Terms and definitions, symbols and abbreviations.74Material.84.1PE compound.84.2Material for non-polyethylene parts.85General characteristics.95.1Appearance.95.2Design.95.3Colour.95.4Electrical characteristics for electrofusion fittings.95.5Appearance of factory made joints.95.6Effect on water quality.96Geometrical characteristics.106.1Measurement of dimensions.106.2Dimensions of electrofusion sockets.106.3Dimensions of spigotted fittings.116.4Dimensions of socket fusion fittings.136.5Dimensions of electrofusion saddle fittings.136.6Dimensions of mechanical fittings.146.7Dimensions of loose backing flanges and flange adapters.147Mechanical characteristics.147.1General.147.2Conditioning.147.3Requirements.147.4Retest in case of failure at 80 °C.157.5Pressure drop.168Physical characteristics.168.1Conditioning.168.2Requirements.169Chemical resistance of fittings in contact with chemicals.1710Performance requirements.1811Marking.1811.1General.1811.2Minimum required marking of fittings.1811.3Minimum required marking on a label.1811.4Fusion system recognition.19SIST EN 12201-3:2003
EN 12201-3:2003 (E)312Packaging.19Annex A (normative)
Socket fusion fittings.20Annex B (informative)
Examples of typical terminal connection for electrofusion fittings.22Bibliography.24SIST EN 12201-3:2003
EN 12201-3:2003 (E)4ForewordThis document EN 12201-3:2003 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 September 2003, and conflicting national standards shall be withdrawn at thelatest by March 2005.This standard is a Part of a System Standard for plastics piping systems of a particular material for a specifiedapplication. 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.This European Standard consists of the following Parts, under the general title Plastics piping systems for watersupply — 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. 1)NOTEIt was decided not to publish a Part 6: Recommended practice for installation. Instead, existing national practices would beapplicable.This Part of this European Standard 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 include thefollowing:EN 1452, Plastics piping systems for water supply — Unplasticized poly(vinyl chloride) (PVC-U)prEN 1796, Plastics piping systems for water supply with or without pressure — Glass-reinforced thermosettingplastics (GRP) based on polyester resins (UP)For components which have conformed to the relevant national standard before [DAV], as shown by themanufacturer or by a certification body, the national standard may continue to be applied until the [DAV + 24months].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, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,Slovak Republic, Spain, Sweden, Switzerland and the United Kingdom.
1)
to be published as a CEN/TS.SIST EN 12201-3:2003
EN 12201-3:2003 (E)5IntroductionThe System Standard, of which this is Part 3, specifies the requirements for a piping system and its componentswhen made from polyethylene (PE), intended to be used for water supply intended for human consumption,including the conveyance of raw water prior to treatment.In respect of potential adverse effects on the quality of water intended for human consumption, caused by theproduct covered by this standard:a) this standard provides no information as to whether the product may be used without restriction in any of theMember States of the EU or EFTA;b) it should be noted that, while awaiting the adoption of verifiable European criteria, existing national regulationsconcerning the use and/or the characteristics of this product remain in force.Requirements and test methods for material and components, other than fittings, are specified in EN 12201-1,EN 12201-2 and EN 12201-4. Characteristics for fitness of purpose are covered in EN 12201-5 andprCEN/TS 12201-7 gives guidance for the assessment of conformity.This Part of this European Standard covers the characteristics of fittings.SIST EN 12201-3:2003
EN 12201-3:2003 (E)61 ScopeThis Part of this European Standard specifies the characteristics of fittings made from polyethylene (PE) intendedfor the conveyance of water for human consumption, including raw water prior to treatment.It also specifies the test parameters for the test methods referred to in this standard.In conjunction with other Parts of this European Standard (see Foreword) it is applicable to PE fittings, their jointsand to joints with components of PE and other materials intended to be used under the following conditions:a) a maximum operating pressure, MOP, up to 25 bar 2);b) an operating temperature of 20 °C as a reference temperature.NOTE 1For applications operating at constant temperature greater than 20 °C and up to 40 °C, see annex A of EN 12201-1:2003.This European Standard covers a range of maximum operating pressures and gives requirements concerningcolours and additives.NOTE 2It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects, taking into account theirparticular requirements and any relevant national guidance or regulations and installation practices or codes.These fittings can be of the following types:— fusion fittings;— butt fusion fittings;— socket fusion fittings (see annex A);— electrofusion fittings;— mechanical fittings;— compression fittings;— flanged fittings.2 Normative 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 the oxidationinduction time.EN 921:1994,
Plastics piping systems — Thermoplastics pipes — Determination of resistance to internal pressureat constant temperature (including corrigendum of 1995).EN 1716,
Plastics piping systems — Polyethylene (PE) tapping tees — Test method for impact resistance of anassembled tapping tee.EN 12201-1:2003,
Plastics piping systems for water supply — Polyethylene (PE) — Part 1: General.
2)1 bar = 105 N/m2SIST EN 12201-3:2003
EN 12201-3:2003 (E)7EN 12201-2:2003,
Plastics piping systems for water supply — Polyethylene (PE) — Part 2: Pipes.EN 12201-5,
Plastics piping systems for water supply — Polyethylene (PE) — Part 5: Fitness for purpose of thesystem.EN ISO 1133:1999,
Plastics — Determination of the melt-mass flow rate (MFR) and the melt-volume flow rate(MVR) of thermoplastics (ISO 1133:1997).prEN ISO 3126:1999,
Plastics piping systems — Plastics piping components — Measurement and determinationof dimensions (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) electrofusionassemblies of nominal outside diameter greater than or equal to 90 mm.ISO 13955:1997,
Plastics pipes and fittings — Crushing decohesion test for polyethylene (PE) electrofusionassemblies.ISO/DIS 13956:1996,
Plastics pipes and fittings — Determination of cohesive strength — Tear test forpolyethylene (PE) assemblies.3 Terms and definitions, symbols and abbreviationsFor the purposes of this European Standard, the terms and definitions, symbols and abbreviations given inEN 12201-1:2003 and the following apply.3.1electrofusion socket fittingpolyethylene (PE) fitting which contains one or more integrated heating elements, that are capable of transformingelectrical energy into heat to realise a fusion joint with a spigot end or a pipe3.2electrofusion saddle fittingpolyethylene (PE) fitting which contains one or more integrated heating elements, that are capable of transformingelectrical energy into heat to realise a fusion on to a pipe3.2.1tapping teeelectrofusion saddle fitting (top loading or wrap round) which contains an integral cutter, to cut through the wall ofthe main pipe. The cutter remains in the body of the saddle after installation3.2.2branch saddleelectrofusion saddle fitting (top loading or wrap round) which requires an ancillary cutting tool for drilling the hole inthe adjoining main pipeSIST EN 12201-3:2003
EN 12201-3:2003 (E)83.3spigot end fittingpolyethylene (PE) fitting where the outside diameter of the spigot length is equal to the nominal outside diameter,dn, of the corresponding pipe3.4mechanical fittingfitting for assembling polyethylene (PE) pipe to another PE pipe or any other element of the piping systemThe mechanical fitting can be supplied for field assembly or pre-assembled by the manufacturer. The fittinggenerally includes a compression part to provide pressure integrity, leaktightness and resistance to end loads. Asupport sleeve inserted into the pipe bore provides a permanent support for the PE pipe to prevent creep in thepipe wall under radial compressive forces.NOTE 1The metallic parts of the fitting can be assembled to metallic pipes by screw threads, compression joints, welded or flangedconnections, 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.3.5voltage regulationcontrol of energy supplied, during the fusion process of an electrofusion fitting, by means of the voltage parameter3.6intensity regulationcontrol of energy supplied, during the fusion process of an electrofusion fitting, by means of the current parameter4 Material4.1 PE compoundThe PE compound from which the fittings are made shall conform to EN 12201-1:2003.4.2 Material for non-polyethylene parts4.2.1 GeneralAll components shall conform to the relevant European Standard(s). Alternative standards may be utilised in caseswhere suitable European Standards do not exist provided that the 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 12201-2:2003 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.4.2.2 Metal 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.SIST EN 12201-3:2003
EN 12201-3:2003 (E)94.2.3 ElastomersElastomeric materials used for the manufacture of seals shall conform to EN 681-1 or EN 681-2, as applicable.4.2.4 Other materialsGreases or lubricants shall not exude on to the fusion areas, and shall not affect the long-term performance of thefitting nor have any adverse effect on the quality of the water.5 General characteristics5.1 AppearanceWhen 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.5.2 DesignThe 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.5.3 ColourThe fitting shall be blue or black.NOTEFor above ground installations, all blue components should be protected from direct UV light.5.4 Electrical characteristics for electrofusion fittingsThe electrical protection that shall be provided by the system depends on the voltage and the current intensity 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 1This type of fitting is a part of an electrical system as defined in EN 60335-1[1], IEC 60364-1[2] and IEC 60449[3]. Aprotection against direct contacts with active parts (live conductors) is required for conformity to EN 60529[4]. This protection isa 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 %).5.5 Appearance 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.5.6 Effect on water qualityAttention is drawn to the requirements of national regulations (see introduction).SIST EN 12201-3:2003
EN 12201-3:2003 (E)106 Geometrical characteristics6.1 Measurement of dimensionsThe dimensions of the fittings shall be measured in accordance with prEN ISO 3126:1999. In the case of disputethe measurement of dimensions shall be made not less than 24 h after manufacture after being conditioned for atleast 4 h at (23 ± 2) °C.6.2 Dimensions of electrofusion sockets6.2.1 Diameters 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.Table 1 — Electrofusion socket dimensionsDimensions in millimetresNominal diameterof the fittingDesign depthFusion zonednL1,minL1,maxL2,minaIntensity regulationVoltage regulation20253240506375901101251401601802002252502803153554004505005606302020202020232528323538424650557381899911012213514716125252525283135405358626874808895104115127140155170188209414144495563707982879298105112120129139150164179195212235255101010101011121315161820212326333539424751566167aIncreased fusion zone lengths are applicable for fittings rated to higher pressures, in order to meet the performancerequirements of this standardThe mean inside diameter of the fitting in the middle of the fusion zone, Dl, shall not be less than dn.SIST EN 12201-3:2003
EN 12201-3:2003 (E)11The 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.KeyD1is the "mean inside diameter in the fusion zone" measured in a plane parallel to the plane of the mouth at a distance of L3 + 0,5L2;D2is the bore which is the minimum diameter of the flow channel through the body of the fitting where D2 ³ (dn - 2emin);L1is the "design penetration depth" of the pipe or male end of a spigot fitting. In the case of a coupling without a stop, it is not greaterthan 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 the fusion zone;L3is the distance between the mouth of the fitting and the start of the fusion zone as declared by the manufacturer to be the nominalunheated entrance length of the fitting L3 shall be ³ 5 mm.Figure 1 — Dimensions of electrofusion sockets6.2.2 Wall 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 wall thickness, 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.NOTEFittings conforming to ISO 8085-3 [5] are deemed to satisfy the requirements of this standard.6.3 Dimensions of spigotted fittingsWhen measured in accordance with 6.1, the spigot dimensions shall conform to the requirements given in Table 3(see Figure 2).SIST EN 12201-3:2003
EN 12201-3:2003 (E)12Table 3 — Spigot dimensionsDimensions in millimetresMean outside diameter of thefusion end aFor electrofusion and butt fusionSocketfusionFor butt fusion onlyNominaloutsidediameterof spigotGrade AGrade BOut-of-roundnessMin.boreCut backlengthTubularlength bTubularlengthOut-of-roundnessCut backlengthTubularlengthNormal cTubularlengthSpecial ddnD1,minD1,maxD1,maxmax.D2L1,minL2,minL2,minmax.L1,minL2,minL2,min202532405063759011012514016018020022525028031535540045050056063020,025,032,040,050,063,075,090,0110,0125,0140,0160,0180,0200,0225,0250,0280,0315,0355,0400,0450,0500,0560,0630,0————————————————282,6317,9358,2403,6454,1504,5565,0635,720,325,332,340,450,463,475,590,6110,7125,8140,9161,0181,1201,2226,4251,5281,7316,9357,2402,4452,7503,0563,4633,80,30,40,50,60,80,91,21,41,71,92,12,42,73,03,43,84,24,85,46,06,87,58,49,51318253139495971879911112714315917919922325128331935939944750325252525252525283235384246505560757575751001001001004141444955637079828792981051121201301391501651801952152352551112,514,617202425283235———————————————————1,51,61,82,22,52,83,23,64,04,55,09,811,112,514,015,617,519,622,1—————56688888810101010101015202020—————16192228323540455055607080909560606060—————56688888810101010121215151520a
Tolerance grades A and B are in accordance with ISO 11922-1[6].b
The values of L2 (electrofusion) are based on the following equations:for dn £ 90, L2 = 0,6dn + 25 mm;for dn ³ 110, L2 = dn/3 + 45 mm.c
Used by preference.d
Used for fittings fabricated in the factory.SIST EN 12201-3:2003
EN 12201-3:2003 (E)13KeyD1is the "mean outside diameter" of the fusion end piece, measured in any plane parallel to the plane of the entrance face at adistance not greater than L2 (tubular length) from that plane;D2is the "minimum bore" which comprises the minimum diameter of the flow channel through the body of the fitting. Themeasurement of the diameter does not include the fusion pad if any;Eis the "body wall thickness of the fitting", which comprises the thickness measured at any point of the wall of the fitting;E1is the "fusion face wall thickness" measured at any point at a maximum distance of L1 (cut back length) from the entrance face;and shall be equal to the pipe wall thickness and tolerance to which it is intended to be butt fused as specified in Table 2 ofEN 12201-2:2003;L1is the "cut back length" of the fusion end piece, which comprises the initial depth of the spigot end, which is necessary to buttfusion or reweld. This length may be obtained by joining a length of pipe to the spigot end of the fitting provided that the wallthickness of th
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