SIST EN 14341:2007

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Industrial valves - Steel check valvesIndustrijski ventili – Jekleni protipovratni ventiliRobinetterie industrielle - Clapets de non-retour en acierIndustriearmaturen - Rückflussverhinderer aus StahlTa slovenski standard je istoveten z:EN 14341:2006SIST EN 14341:2007en23.060.50Blokirni ventiliCheck valvesICS:SLOVENSKI
STANDARDSIST EN 14341:200701-januar-2007







EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14341July 2006ICS 23.060.50 English VersionIndustrial valves - Steel check valvesRobinetterie industrielle - Clapets de non-retour en acierIndustriearmaturen - Rückflussverhinderer aus StahlThis European Standard was approved by CEN on 19 June 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2006 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14341:2006: E



EN 14341:2006 (E) 2 Contents Page Foreword.3 1 Scope.4 2 Normative references.4 3 Terms and definitions.6 4 Requirements.6 4.1 Design.6 4.2 Functional characteristics.9 5 Test procedures.10 6 Declaration of compliance.10 7 Designation.10 8 Marking and preparation for storage and transportation.11 8.1 Marking.11 8.2 Preparation for storage and transportation.11 Annex A (informative)
Information to be supplied by the purchaser.13 Annex ZA (informative)
Relationship between this European Standard and the Essential Requirements of EU Directive 97/23/EC (PED).14



EN 14341:2006 (E) 3 Foreword This document (EN 14341:2006) has been prepared by Technical Committee CEN/TC 69 “Industrial valves”, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by January 2007, and conflicting national standards shall be withdrawn at the latest by January 2007. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.



EN 14341:2006 (E) 4 1 Scope This European Standard specifies the requirements for steel check valves, which are forged, cast or fabricated in straight, angle or oblique pattern (see EN 736-2) with end connections flanged or wafer, butt welding, socket welding, or threaded. This standard is applicable to steel check valves mainly used for industrial and general purpose applications. However, they can be used for other applications provided the requirements of the relevant performance standards are met. Back flow prevention anti-pollution check valves are outside the scope of this standard. The range of nominal sizes covered is:  DN 8; DN 10; DN 12; DN 15; DN 20; DN 25; DN 32; DN 40; DN 50; DN 65; DN 80; DN 100; DN 125; DN 150; DN 200; DN 250; DN 300; DN 350; DN 400; DN 450; DN 500; DN 600; DN 700; DN 750; DN 800; DN 900; DN 1000. DN 750 is used for Class designated valves only. DN 8 and DN 12 are not used for PN designated flanged end connections. DN 8, DN 10 and DN 12 are not used for Class designated flanged end connections. Socket welding end valves and threaded end valves are limited to the range DN 8 to DN 65. The range of pressure designations covered is: a) for flanged end, wafer type and butt welding end valves: PN 10; PN 16; PN 25; PN 40; PN 63; PN 100; Class 150; Class 300; Class 600. b) for socket welding end valves and threaded end valves: PN 40; PN 63; PN 100; Class 600; Class 800. NOTE Class 800 is a Class designation widely used for socket welding and threaded end valves. 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 19:2002, Industrial valves — Marking of metallic valves EN 287-1:2004, Qualification test of welders — Fusion welding — Part 1: Steels



EN 14341:2006 (E) 5 prEN 558:20051), Industrial valves — Face-to-face and centre-to-face dimensions of metal valves for use in flanged pipe systems — PN and Class designated valves 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 736-3:1999, Valves — Terminology — Part 3: Definition of terms EN 1092-1:2001, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN designated — Part 1: Steel flanges EN 1418:1997, Welding personnel — Approval testing of welding operators for fusion welding and resistance weld setters for fully mechanized and automatic welding of metallic materials EN 1503-1:2000, Valves — Materials for bodies, bonnets and covers — Part 1: Steels specified in European Standards EN 1503-2:2000, Valves — Materials for bodies, bonnets and covers — Part 2: Steels other than those specified in European Standards EN 1759-1:2004, Flanges and their joint — Circular flanges for pipes, valves, fittings and accessories, Class designated — Part 1: Steel flanges, NPS ½ to 24 EN 10045-1:1990, Metallic materials — Charpy impact test — Part 1: Test method EN 12266-1:2003, Industrial valves — Testing of valves — Part 1: Pressure tests, test procedures and acceptance criteria — Mandatory requirements EN 12266-2:2002, Industrial valves — Testing of valves — Part 2: Tests, test procedures and acceptance criteria — Supplementary requirements EN 12351:1999, Industrial valves — Protective caps for valves with flanged connections EN 12516-1:2005, Industrial valves — Shell design strength — Part 1: Tabulation method for steel valve shells EN 12516-2:2004, Industrial valves — Shell design strength — Part 2: Calculation method for steel valve shells EN 12516-3:2002, Valves — Shell design strength — Part 3: Experimental method EN 12627:1999, Industrial valves — Butt welding ends for steel valves EN 12760:1999, Valves — Socket welding ends for steel valves EN 12982:2000, Industrial valves — End-to-end and centre-to-end dimensions for butt welding end valves EN ISO 228-1:2003, Pipe threads where pressure-tight joints are not made on the threads — Part 1: Dimensions, tolerances and designation (ISO 228-1:2000) EN ISO 15607:2003, Specification and qualification of welding procedures for metallic materials — General rules (ISO 15607:2003)
1) Under preparation.



EN 14341:2006 (E) 6 ISO 7-1:1994, Pipe threads where pressure-tight joints are made on the threads — Part 1: Dimensions, tolerances and designation ISO 4200:1991, Plain end steel tubes, welded and seamless — General tables of dimensions and masses per unit length ASME B1.20.1, Pipe Threads, General Purpose (Inch) 3 Terms and definitions For the purposes of this standard, the terms and definitions of types of valves and components and the terms and definitions given in EN 736-1:1995, EN 736-2:1997 and EN 736-3:1999 apply. NOTE 1 The terms maximum allowable pressure, PS, and test pressure, PT, defined in EU Directive 97/23/EC (PED) are equivalent to the terms allowable pressure, ps, and test pressure, pt, defined in EN 736-3. NOTE 2 EN 736-1 illustrates four basic check valve types. The axial and lift types are based on the globe valve, the swing type is based on the butterfly valve and the diaphragm type is based on the diaphragm valve. Other check valve types are possible and are considered to be within the scope of this standard. 4 Requirements 4.1 Design 4.1.1 Materials 4.1.1.1 The body and cover materials shall be selected from those listed in EN 1503-1 and EN 1503-2. 4.1.1.2 All the internal parts in contact with the fluid shall be made of a material whose corrosion resistance to the fluid being carried is at least equal to the body and bonnet material. 4.1.2 Pressure/temperature ratings 4.1.2.1 The pressure/temperature ratings shall be as specified in EN 12516-1 for the particular body/bonnet material group. 4.1.2.2 The pressure/temperature ratings applicable to Class 800 socket welding and threaded end valves shall be the Class 600 rating for the applicable material group multiplied by the ratio of 800/600. 4.1.2.3 Restrictions of temperature and pressure below those specified in 4.1.2.1 and 4.1.2.2 for example, those imposed by soft seals and special trims shall be indicated on the valve (see 8.1e). 4.1.2.4 For temperatures below the lowest temperature shown in the pressure/temperature rating tables in EN 12516-1 the maximum allowable pressure sha
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