EN 1555-4:2002

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Cevni sistemi iz polimernih materialov za oskrbo s plinastimi gorivi - Polietilen (PE) - 4. del: VentiliKunststoff-Rohrleitungssysteme für die Gasversorgung - Polyethylen (PE) - Teil 4: ArmaturenSystemes de canalisations en plastique pour la distribution de combustibles gazeux - Polyéthylene (PE) - Partie 4: RobinetsPlastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 4: Valves91.140.40Sistemi za oskrbo s plinomGas supply systems83.140.30Cevi, fitingi in ventili iz polimernih materialovPlastics pipes, fittings and valvesICS:Ta slovenski standard je istoveten z:EN 1555-4:2002SIST EN 1555-4:2003en01-oktober-2003SIST EN 1555-4:2003SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 1555-4December 2002ICS 23.060.01; 91.140.40English versionPlastics piping systems for the supply of gaseous fuels -Polyethylene (PE) - Part 4: ValvesSystèmes de canalisations en plastique pour la distributionde combustibles gazeux - Polyéthylène (PE) - Partie 4:RobinetsKunststoff-Rohrleitungssysteme für die Gasversorgung -Polyethylen (PE) - Teil 4: ArmaturenThis European Standard was approved by CEN on 1 November 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 1555-4:2002 ESIST EN 1555-4:2003

Characteristics for fitness for purpose are covered in EN 1555-5. PrCEN/TS
1555-7[2]gives guidance for assessment of conformity. Recommended practice for installation is given in EN 12007-2[1]prepared by CEN/TC 234.This part of EN 1555 covers the characteristics of valves.SIST EN 1555-4:2003

a maximum operating pressure, MOP, up to and including 10 bar 1) ;b)
an operating temperature of 20 °C as reference temperature;NOTE 1
For other operating temperatures, derating coefficients should be used, see EN 1555-5.c)
an operating temperature between -20 °C and +40 °C.EN 1555 covers a range of maximum operating pressures and gives requirements concerning colours andadditives.NOTE 2
It 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 regulations and installation practices or codes.It is applicable to bi-directional valves with spigot end or electrofusion socket intended to be fused with PE pipesconforming to EN 1555-2 without any fittings or with PE fittings conforming to EN 1555-3.This part of EN 1555 covers valves with a nominal size DN/OD £ 225.2 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 682, Elastomeric Seals - Materials requirements for seals used in pipes and fittings carrying gas andhydrocarbon fluids.EN 728, Plastics piping and ducting systems ¾ Polyolefin pipes and fittings ¾ Determination of oxidation inductiontime.EN 744, Plastics piping and ducting systems - Thermoplastics pipes - Test method for resistance to external blowsby the round-the-clock method.EN 917, Plastics piping systems - Thermoplastics valves - Test methods for resistance to internal pressure andleaktightness.EN 1555-1:2002, Plastics piping systems for the supply of gaseous fuels ¾ Polyethylene (PE) ¾ Part 1: General.EN 1555-2:2002, Plastics piping systems for the supply of gaseous fuels ¾ Polyethylene (PE) ¾ Part 2: Pipes.EN 1555-3:2002, Plastics piping systems for the supply of gaseous fuels ¾ Polyethylene (PE) ¾ Part 3: Fittings.
1) 1 bar = 0.1 MPaSIST EN 1555-4:2003

the internal leaktightness of a valve's closing seat when closed and pressurized from either sideb)
the external leaktightness of a valve when half open3.4initiating torquetorque required to initiate movement of the obturator3.5running torquetorque required to achieve full opening or closing of the valve at maximum allowable operating pressureSIST EN 1555-4:2003
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