Plastics piping systems for water supply, and for drainage and sewerage under pressure - Polyethylene (PE) - Part 4: Valves

This Part of EN 12201 specifies the characteristics of valves or valve bodies made from polyethylene (PE 100 and PE 80) for buried and above ground applications, intended for the conveyance of water for human consumption, raw water prior to treatment, drainage and sewerage under pressure, vacuum sewer systems, and water for other purposes.
NOTE 1   For valves or valve bodies intended for drainage and sewerage under pressure, additional specifications/tests may be necessary according to the requirements of the purchaser, especially for the chemical resistance of the components in contact with the fluids and functioning characteristics.
NOTE 2   For PE components intended for the conveyance of water for human consumption and raw water prior to treatment attention is drawn to 5.4. Components manufactured for water for other purposes may not be suitable for water supply for human consumption.
It also specifies the test parameters for the test methods referred to in this European Standard.
NOTE 3   Valves made from material other than polyethylene (PE) designed for the supply of water intended for human consumption to a relevant standard(s) can be used in PE piping systems conforming to EN 12201 when they have relevant PE connection for butt fusion or electrofusion ends (see EN 12201-3:2011).
In conjunction with Parts 1, 2, 3 and 5 of EN 12201 it is applicable to PE valves, their joints and to joints with components of PE and other materials intended to be used under the following conditions:
a)   allowable operating pressure, PFA, up to 25 bar  )
b)   an operating temperature of 20 °C as a reference temperature;
c)   buried in the ground;
d)   sea outfalls;
e)   laid in water;
f)   above ground, including pipes suspended below bridges.
NOTE 4   For applications operating at constant temperature greater than 20 °C and up to 40 °C, see EN 12201 1:2011, Annex A.
EN 12201 covers a range of allowable operating pressures and gives requirements concerning colours and additives.
NOTE 5   It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects, taking into account their particular requirements and any relevant national guidance or regulations and installation practices or codes.
This Part of EN 12201 covers valves for pipes with a nominal outside diameter dn ≤ 315 mm.

Kunststoff-Rohrleitungssysteme für die Wasserversorgung und für Entwässerungs- und Abwasserdruckleitungen - Polyethylen (PE) - Teil 4: Armaturen

Dieser Teil von EN 12201 legt die Eigenschaften von Armaturen oder Armaturenkörpern aus Polyethylen (PE 100 und PE 80) fest, die für erdverlegte und oberirdische Anwendungen für den Transport von Trinkwasser, einschließlich des Transports des zur Aufbereitung zu Trinkwasser verwendeten Rohwassers, für Entwässerungs- und Abwasserdruckleitungen, Unterdruckentwässerungssystemen sowie für Wasser für andere Zwecke, vorgesehen sind. ANMERKUNG 1 Für Armaturen oder Armaturenkörper für Entwässerungs- und Abwasserdruckleitungen können entsprechend den Anforderungen des Anwenders zusätzliche Spezifikationen/Prüfungen erforderlich sein, insbesondere hinsichtlich der chemischen Beständigkeit der Rohrleitungsteile in Kontakt mit den Medien sowie der Eigenschaften der Funktionsfähigkeit. ANMERKUNG 2 In Zusammenhang mit Rohrleitungsteilen aus PE für die Wasserversorgung für den menschlichen Ge-brauch sowie für die Fortleitung von Rohwasser vor der Aufbereitung zu Trinkwasser wird auf 5.4 verwiesen. Für Wasser für andere Verwendungszwecke gefertigte Rohrleitungsteile sind möglicherweise nicht für die Wasserversorgung für den menschlichen Gebrauch geeignet. Er legt auch die Prüfparameter für die Prüfverfahren fest, auf die in dieser Europäischen Norm verwiesen wird. ANMERKUNG 3 Armaturen aus anderen Werkstoffen als Polyethylen (PE), die für den Einsatz in der Wasserversorgung für den menschlichen Gebrauch vorgesehen sind und die die Anforderungen der entsprechenden Norm(en) erfüllen, können in Rohrleitungssystemen aus PE nach EN 12201 eingebaut werden, wenn die Verschweißbarkeit mit den entsprechenden Anschlüssen aus PE mittels Stumpf- oder Heizwendelschweißung (siehe EN 12201-3:2011) sichergestellt ist. Zusammen mit den Teilen 1, 2, 3 und 5 der EN 12201 gilt er für Armaturen aus PE, deren Verbindungen untereinander, mit anderen Rohrleitungsteilen aus PE sowie aus anderen Werkstoffen, die zur Verwendung unter den folgenden Bedingungen vorgesehen sind: a) zulässiger Betriebsdruck PFA bis 25 bar1); b) eine Betriebstemperatur von 20 °C als Bezugstemperatur; c) erdverlegt; d) Entwässerung ins Meer (Siele); e) in Gewässern verlegt; f) oberirdisch verlegt, einschließlich Düker und Brückenleitungen. ANMERKUNG 4 Für Anwendungsgebiete, in denen konstante Betriebstemperaturen über 20 °C bis 40 °C auftreten, siehe EN 12201-1:2011, Anhang A. EN 12201 enthält Festlegungen über zulässige Betriebsdrücke und legt Anforderungen an die Einfärbung sowie die Verwendung von Zusatzstoffen fest. ANMERKUNG 5 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. Dieser Teil der EN 12201 gilt für Armaturen für Rohre mit einem Nenn-Außendurchmesser von dn <+/- 315 mm.

Systèmes de canalisations en plastique pour l'alimentation en eau et pour les branchements et les collecteurs d'assainissement avec pression - Polyéthylène (PE) - Partie 4: Robinets

La présente partie de l'EN 12201 spécifie les caractéristiques des robinets ou des corps de robinets en
polyéthylène (PE 100 et PE 80) pour les applications enterrées et non enterrées, prévus pour le transport
d'eau destinée à la consommation humaine, y compris d'eau brute avant traitement, les branchements et les
collecteurs d'assainissement avec pression, les réseaux d'évacuation des eaux usées sous vide et l'eau
destinée à d'autres usages.
NOTE 1 Pour les robinets ou corps de robinets prévus pour les branchements et les collecteurs d'assainissement avec
pression, des spécifications/essais supplémentaires peuvent être nécessaires conformément aux exigences de l'acheteur,
en particulier pour la résistance chimique des composants en contact avec les fluides et les caractéristiques de
fonctionnement.
NOTE 2 Pour les composants en polyéthylène (PE) prévus pour le transport d'eau destinée à la consommation
humaine et d'eau brute avant traitement, l'attention est attirée sur le 5.4. Les composants fabriqués pour l'eau destinée à
d'autres usages peuvent s'avérer inaptes pour l'alimentation en eau destinée à la consommation humaine.
Elle spécifie également les paramètres d'essai des méthodes d'essai auxquelles il est fait référence dans la
présente Norme européenne.
NOTE 3 Les robinets fabriqués à partir d'autres matières que le polyéthylène (PE) prévus pour l'alimentation d'eau
destinée à la consommation humaine, conformes à une ou plusieurs normes correspondantes, peuvent être utilisés dans
les systèmes de canalisations en PE conformes à l'EN 12201 à condition qu'ils aient des extrémités en PE adaptées à
l'assemblage par soudage bout-à-bout ou par électrosoudage (voir l'EN 12201-3:2011).
Conjointement avec les Parties 1, 2, 3 et 5 de l'EN 12201, elle s'applique aux robinets fabriqués en
polyéthylène (PE) et leurs assemblages, ainsi qu'aux assemblages avec des composants fabriqués en
polyéthylène et en d'autres matières, destinés à être utilisés dans les conditions suivantes :
a) avec une pression de service admissible, PFA, jusqu'à 25 bar1) ;
b) à une température de service de 20 °C comme température de référence ;
c) enterrés dans le sol ;
d) comme émissaires de rejet en mer ;
e) posés dans l'eau ;
f) non enterrés, y compris canalisations suspendues sous des ponts.
NOTE 4 Pour les applications à température de service constante supérieure à 20 °C et jusqu'à 40 °C, voir
l’EN 12201-1:2011, Annexe A.
L’EN 12201 couvre une plage de pressions de service admissibles et définit des exigences concernant les
couleurs et les additifs.
NOTE 5 Il incombe à l'acheteur ou au prescripteur la responsabilité de réaliser une sélection convenable de ces
aspects en prenant en compte les exigences particulières ainsi que les directives ou règles nationales et les pratiques et
codes de pose en usage dans son pays.
La présente partie de l’EN 12201 traite des robinets pour les tubes ayant un diamètre extérieur nominal
dn <+/- 315 mm.

Cevni sistemi iz polimernih materialov za oskrbo z vodo in za odvodnjavanje in kanalizacijo pod tlakom - Polietilen (PE) - 4. del: Ventili

Ta del standarda EN 12201 določa značilnosti ventilov ali ohišij ventilov iz polietilena (PE), ki se uporabljajo pri transportu pitne vode, vključno s transportom neobdelane vode pred obdelavo.
Določa tudi preskusne parametre za preskusne metode iz tega standarda.
OPOMBA 1: S cevnimi sistemi iz polietilena v skladu s standardom prEN 12201 se smejo uporabljati ventili, ki niso narejeni iz polietilena, so namenjeni oskrbi s pitno vodo in so skladni z zadevnimi standardi, če imajo ustrezne priključke za soležno taljene ali elektrofuzijske konce (glej prEN 12201-3).
Ta standard se v povezavi z drugimi deli standarda prEN 12201 uporablja za ventile iz polietilena, njihove spoje ter spoje s komponentami iz polietilena in drugih materialov, namenjene uporabi v naslednjih pogojih:
a) najvišji obratovalni tlak MOP do vključno 25 barov;
b) obratovalna temperatura 20 °C kot referenčna temperatura.
OPOMBA 2: V zvezi z napravami, ki delujejo pri konstantnih temperaturah med 20 in 40 °C, glejte dodatek A k standardu prEN 12201-1:1999.
prEN 12201 zajema razpon najvišjih obratovalnih tlakov in določa zahteve glede barv in aditivov.
OPOMBA 3: Za ustrezno izbiro med temi vidiki je odgovoren kupec, pri čemer mora upoštevati konkretne zahteve ter vse pomembne nacionalne predpise in prakse ali kodekse vgradnje.
Ta del standarda EN 12201 zajema ventile za cevi z nominalnim zunanjim premerom dn £ 225 mm.

General Information

Status
Published
Publication Date
31-Jan-2012
Current Stage
9092 - Decision on results of review/2YR ENQ - revise - Review Enquiry
Due Date
15-Apr-2017
Completion Date
09-Aug-2018

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Cevni sistemi iz polimernih materialov za oskrbo z vodo in za odvodnjavanje in kanalizacijo pod tlakom - Polietilen (PE) - 4. del: VentiliKunststoff-Rohrleitungssysteme für die Wasserversorgung und für Entwässerungs- und Abwasserdruckleitungen - Polyethylen (PE) - Teil 4: ArmaturenSystèmes de canalisations en plastique pour l'alimentation en eau et pour les branchements et les collecteurs d'assainissement avec pression - Polyéthylène (PE) - Partie 4: RobinetsPlastics piping systems for water supply, and for drainage and sewerage under pressure - Polyethylene (PE) - Part 4: Valves93.030Zunanji sistemi za odpadno vodoExternal sewage systems91.140.60Sistemi za oskrbo z vodoWater supply systems23.060.01Ventili na splošnoValves in generalICS:Ta slovenski standard je istoveten z:EN 12201-4:2012SIST EN 12201-4:2012en,fr,de01-maj-2012SIST EN 12201-4:2012SLOVENSKI

STANDARDSIST EN 13244-4:2003SIST EN 12201-4:20021DGRPHãþD
SIST EN 12201-4:2012
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12201-4

February 2012 ICS 23.060.01; 91.140.60 Supersedes EN 12201-4:2001, EN 13244-4:2002English Version

Plastics piping systems for water supply, and for drainage and sewerage under pressure - Polyethylene (PE) - Part 4: Valves for water supply systems

Systèmes de canalisations en plastique pour l'alimentation en eau et pour les branchements et les collecteurs d'assainissement avec pression - Polyéthylène (PE) - Partie 4: Robinets pour les systèmes d'alimentation en eau Kunststoff-Rohrleitungssysteme für die Wasserversorgung und für Entwässerungs- und Abwasserdruckleitungen - Polyethylen (PE) - Teil 4: Armaturen für Wasserversorgungssysteme This European Standard was approved by CEN on 16 December 2011.

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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,

B-1000 Brussels © 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12201-4:2012: ESIST EN 12201-4:2012

EN 12201-4:2012 (E) 2 Contents Page Foreword ................................................................................................................................................ 3Introduction ........................................................................................................................................... 41Scope .............................................................................................................................................. 52Normative references ................................................................................................................... 63Terms and definitions, symbols and abbreviations .................................................................. 64Material ........................................................................................................................................... 84.1Compound .................................................................................................................................. 84.2Material for non-polyethylene parts ......................................................................................... 85General characteristics ................................................................................................................ 95.1Appearance of the valve ............................................................................................................ 95.2Colour .......................................................................................................................................... 95.3Design ......................................................................................................................................... 95.4Effect on water quality ............................................................................................................. 106Geometric characteristics .......................................................................................................... 106.1General ...................................................................................................................................... 106.2Measurement of dimensions .................................................................................................. 106.3Dimensions of spigot ends for valves ................................................................................... 106.4Dimensions of valves with electrofusion sockets ................................................................ 106.5Dimensions of the operating device ...................................................................................... 107Mechanical characteristics for assembled valves ................................................................... 117.1General ...................................................................................................................................... 117.2Requirements ........................................................................................................................... 118Physical characteristics ............................................................................................................. 158.1Conditioning ............................................................................................................................. 158.2Requirements ........................................................................................................................... 159Performance requirements ........................................................................................................ 1610Marking......................................................................................................................................... 1610.1General ...................................................................................................................................... 1610.2Minimum required marking of valves .................................................................................... 1710.3Additional Marking ................................................................................................................... 1711Delivery Conditions .................................................................................................................... 17Annex A (normative)

Determination of the leaktightness of seat and packing .......................... 18A.1General ...................................................................................................................................... 18A.2Test method .............................................................................................................................. 18Bibliography ........................................................................................................................................ 19 SIST EN 12201-4:2012

EN 12201-4:2012 (E) 3 Foreword This document (EN 12201-4:2012) has been prepared by Technical Committee CEN/TC 155 “Plastics piping systems 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 or by endorsement, at the latest by August 2012, and conflicting national standards shall be withdrawn at the latest by August 2012. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 12201-4:2001, EN 13244-4:2002. System Standards are based on the results of the work being undertaken in ISO/TC 138 "Plastics pipes, fittings and valves for the transport of fluids", which is a Technical Committee of the International Organization for Standardization (ISO). EN 12201 consists of the following Parts, under the general title Plastics piping systems for water supply and for drainage and sewerage under pressure — Polyethylene (PE):  Part 1: General  Part 2: Pipes  Part 3: Fittings  Part 4: Valves for water supply systems (this standard)  Part 5: Fitness for purpose of the system  Part 7: Guidance for the assessment of conformity (CEN/TS). According to the CEN/CENELEC Internal Regulations, the national standards organizations 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

SIST EN 12201-4:2012

EN 12201-4:2012 (E) 4 Introduction This European Standard, known as the System Standard, specifies the requirements for a piping system and its components when made from polyethylene (PE). The piping system is intended to be used for water supply intended for human consumption, including the conveyance of raw water prior to treatment, drainage and sewerage under pressure, vacuum sewer systems, and water for other purposes. In respect of potential adverse effects on the quality of water intended for human consumption, caused by the product covered by EN 12201: a) this European Standard provides no information as to whether the products may be used without restriction in any of the Member States of the EU or EFTA; b) products intended for use in water supply systems must comply, when existing, with national regulations and testing arrangements that ensure fitness for contact with drinking water. NOTE On April 2006, EC Commission set up a revised mandate (M/136) asking CEN to propose harmonised product standards and support standards for test methods which could be used for assessing the fitness for contact with drinking water. In parallel, EC Commission has launched processes for a regulation of construction products (CPR) to be substituted to CP directive (89/106/EC) and for the revision of drinking water directive (98/83/EC). If relevant, when the outputs of these processes will be known, European Product Standards will be amended by the addition of an Annex Z under Mandate M/136 which will contain formal references to the applicable requirements. Until such amendments, the current national regulations remain applicable. Requirements and test methods for material and components, other than valves, are specified in EN 12201-1:2011, EN 12201-2 and EN 12201-3:2011. Characteristics for fitness of purpose are covered in EN 12201-5. CEN/TS 12201-7 [1] gives guidance for the assessment of conformity. This Part of EN 12201 covers the characteristics of valves. SIST EN 12201-4:2012

EN 12201-4:2012 (E) 5 1 Scope This Part of EN 12201 specifies the characteristics of valves or valve bodies made from polyethylene (PE 100 and PE 80) for buried and above ground applications, intended for the conveyance of water for human consumption, raw water prior to treatment, drainage and sewerage under pressure, vacuum sewer systems, and water for other purposes. NOTE 1 For valves or valve bodies intended for drainage and sewerage under pressure, additional specifications/tests may be necessary according to the requirements of the purchaser, especially for the chemical resistance of the components in contact with the fluids and functioning characteristics. NOTE 2 For PE components intended for the conveyance of water for human consumption and raw water prior to treatment attention is drawn to 5.4. Components manufactured for water for other purposes may not be suitable for water supply for human consumption. It also specifies the test parameters for the test methods referred to in this European Standard. NOTE 3 Valves made from material other than polyethylene (PE) designed for the supply of water intended for human consumption to a relevant standard(s) can be used in PE piping systems conforming to EN 12201 when they have relevant PE connection for butt fusion or electrofusion ends (see EN 12201-3:2011). In conjunction with Parts 1, 2, 3 and 5 of EN 12201 it is applicable to PE valves, their joints and to joints with components of PE and other materials intended to be used under the following conditions: a) allowable operating pressure, PFA, up to 25 bar 1) b) an operating temperature of 20 °C as a reference temperature; c) buried in the ground; d) sea outfalls; e) laid in water; f) above ground, including pipes suspended below bridges. NOTE 4 For applications operating at constant temperature greater than 20 °C and up to 40 °C, see EN 12201-1:2011, Annex A. EN 12201 covers a range of allowable operating pressures and gives requirements concerning colours and additives. NOTE 5 It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects, taking into account their particular requirements and any relevant national guidance or regulations and installation practices or codes. This Part of EN 12201 covers valves for pipes with a nominal outside diameter dn ≤ 315 mm.

1) 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2. SIST EN 12201-4:2012

EN 12201-4:2012 (E) 6 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 — Materials requirements for pipe joint seals used in water and drainage applications — Part 1: Vulcanized rubber EN 736-1:1995, Valves — Terminology — Part 1: Definition of types of valves EN 736-2:1997, Valves — Terminology — Part 2: Definition of components of valves EN 1680, Plastics piping systems — Valves for polyethylene (PE) piping systems — Test method for leaktightness under and after bending applied to the operating mechanisms EN 1705, Plastics piping systems — Thermoplastics valves — Test method for the integrity of a valve after an external blow EN 12100, Plastic piping systems — Polyethylene (PE) valves — Test method for resistance to bending between supports EN 12201-1:2011, Plastics piping systems for water supply, and for drainage and sewerage under pressure — Polyethylene (PE) — Part 1: General EN 12201-2, Plastics piping systems for water supply, and for drainage and sewerage under pressure — Polyethylene (PE) — Part 2: Pipes EN 12201-3:2011, Plastics piping systems for water supply, and for drainage and sewerage under pressure — Polyethylene (PE) — Part 3: Fittings EN 12201-5, Plastics piping systems for water supply, and for drainage and sewerage under pressure — Polyethylene (PE) — Part 5: Fitness for purpose of the system EN 28233, Thermoplastic valves — Torque — Test method (ISO 8233) EN ISO 1133, Plastics — Determination of the melt mass-flow rate (MFR) and the melt volume-flow rate (MVR) of thermoplastics (ISO 1133) EN ISO 1167-1, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids — Determination of the resistance to internal pressure — Part 1: General method (ISO 1167-1) EN ISO 1167-4, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids — Determination of the resistance to internal pressure — Part 4: Preparation of assemblies (ISO 1167-4) EN ISO 3126, Plastics piping systems — Plastics components — Determination of dimensions (ISO 3126) ISO 10933, Polyethylene (PE) valves for gas distribution systems ISO 11357-6, Plastics — Differential scanning calorimetry (DSC) — Part 6: Determination of oxidation induction time (isothermal OIT) and oxidation induction temperature (dynamic OIT) 3 Terms and definitions, symbols and abbreviations For the purposes of this document, the terms and definitions, symbols and abbreviations given in EN 12201-1:2011, EN 736-1:1995, EN 736-2:1997 and the following apply. SIST EN 12201-4:2012

EN 12201-4:2012 (E) 7 3.1 external leaktightness leaktightness of the body enveloping the space containing the water, with respect to the atmosphere 3.2 internal leaktightness leaktightness between the inlet and the outlet of the valve, with the valve in the closed position 3.3 leaktightness test test for both of the following characteristics: a) the internal leaktightness of the valve's closing seat when closed and pressurised from either side; b) the external leaktightness of the valve when half open 3.4 initiating torque torque required to initiate movement of the obturator 3.5 running torque torque required to achieve full opening or closing of the valve at maximum allowable operating pressure 3.6 leakage seepage of water from the valve body, or any component of the valve 3.7 valve body main part of a valve which contains the obturating device (closing element, the seat, the packing seals and the operating stop), as applicable and provides the terminal ends for connection to the PE pipe/fittings 3.8 operating device part of a valve for connection with the operating key which allows the opening and closing of the valve 3.9 Terms relating to design 3.9.1

full bore valve valve with a flow section equal to or greater than 80 % of the section corresponding to the nominal inside diameter of the body end port [EN 736-3:2008[6]] 3.9.2 clearway valve valve designed to have an unobstructed flow way, which allows for the passage of a theoretical sphere with a diameter that is not less than the nominal inside diameter of the body end port [EN 736-3:2008[6]] 3.9.3 reduced bore valve valve with a flow section equal to or greater than 36 % of the section corresponding to the nominal inside diameter of the body end port and which does not correspond to the full bore valve [EN 736-3:2008[6]] SIST EN 12201-4:2012

EN 12201-4:2012 (E) 8 4 Material 4.1 Compound The compound from which the body of the valve, with spigot end or electrofusion socket is made, shall be PE 80 and PE 100 only, and shall conform to EN 12201-1:2011. The PE components of the valve shall only be made from virgin material conforming to EN 12201-1:2011. 4.2 Material for non-polyethylene parts 4.2.1 General All components shall conform to the relevant European Standard(s). Alternative standards may be utilised in cases where suitable European Standard(s) do not exist provided a fitness for purpose of the components can be demonstrated. The materials and the constituent elements used in making the valves (including elastomers, greases and any metal parts as may be used) shall be as resistant to the external and internal environment as the other elements of the piping system. They also shall have a life expectancy under the following conditions at least equal to that of the PE pipes conforming to EN 12201 2:2011 with which they are intended to be used: a) during storage; b) under the effect of the water conveyed therein; c) with respect to the service environment and operating conditions. The requirements for the level of material performance for non-polyethylene parts shall be at least as stringent as that of the PE compound for the piping system. Other materials used in valves in contact with the PE pipe shall not adversely affect the

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