SIST EN 14141:2013
(Main)Valves for natural gas transportation in pipelines - Performance requirements and tests
Valves for natural gas transportation in pipelines - Performance requirements and tests
This European Standard applies to all valves (plug, ball, gate and check valves) used in onshore transmission pipelines for transport of natural gas in accordance with EN 1594, but with a differing temperature range according to the following three classes in accordance with EN 682: 1) - 10 °C to 60 °C; 2) - 20 °C to 60 °C; 3) the range stated by the purchaser for special design. This European Standard comprises all valves which are components of the pipeline. This European Standard specifies valves for pipelines with a maximum operating pressure (MOP) over 16 bar. Control valves and safety valves are excluded from the scope of this European Standard. This European Standard specifies requirements and appropriate verification tests carried out during production and for certification purposes to verify that the valves conform to the requirements. A summary of the product and type tests is given in Annex G. This European Standard makes reference to EN 13942. All the requirements of EN 13942 should be met unless otherwise stated. Paragraphs marked with a dot [•] indicate requirements which are identical to EN 13942. Additional national requirements and tests in accordance with individual national legal regulations not yet harmonised may be necessary and are to be advised in the purchase order.
Armaturen für den Transport von Erdgas in Fernleitungen - Anforderungen an die Gebrauchstauglichkeit und deren Prüfung
Diese Europäische Norm gilt für alle Armaturen (Kegelhähne, Kugelhähne, Schieber und Rückschlagklappen) in Onshore-Fernleitungen für den Transport von Erdgas nach EN 1594, jedoch mit einem anderen Temperaturbereich entsprechend den drei folgenden Klassen nach EN 682: 1) -10 °C bis 60 °C; 2) -20 °C bis 60 °C; 3) nach dem vom Besteller angegebenen Bereich für besondere Konstruktionen. Diese Europäische Norm umfasst alle Armaturen, die Bestandteil der Fernleitung sind. Diese Europäische Norm legt Armaturen für Fernleitungen mit einem maximal zulässigen Betriebsdruck (en: maximum operating pressure (MOP)) über 16 bar fest. Regelarmaturen und Sicherheitsventile sind aus dem Anwendungsbereich ausgeschlossen. Diese Europäische Norm legt die Anforderungen und die entsprechenden Prüfungen fest, die bei der Fertigung und für die Zertifizierung durchgeführt werden, um nachzuweisen, dass die Armaturen die Anforderungen erfüllen. Die Produkt- und Typprüfungen sind in Anhang H zusammengefasst. Diese Europäische Norm verweist auf EN 13942. Falls nicht anders angegeben, sollten alle Anforderungen nach EN 13942 erfüllt werden. Mit einem Punkt [•] gekennzeichnete Absätze enthalten Anforderungen, die mit den Anforderungen von EN 13942 identisch sind. Zusätzliche nationale Anforderungen und Prüfungen auf Grund noch nicht harmonisierter gesetzlicher Regelungen auf einzelstaatlicher Ebene können erforderlich werden und sind bei der Bestellung anzugeben.
Robinetterie pour le transport de gaz naturel par des pipelines - Exigences de performance et essais
La présente Norme européenne s'applique à tous les appareils de robinetterie (robinets à tournant conique, robinets à tournant sphérique, robinets-vannes et clapets de non-retour) utilisés dans des pipelines terrestres de transport du gaz naturel conformément à l'EN 1594, mais avec une plage de température différente selon les trois classes suivantes conformément à l'EN 682 : 1) - 10 °C à 60 °C ; 2) - 20 °C à 60 °C ; 3) la plage indiquée par l'acheteur pour une conception particulière. La présente Norme européenne comprend tous les appareils de robinetterie faisant partie intégrante du pipeline. La présente Norme européenne s'applique aux appareils de robinetterie pour pipelines dont la pression maximale de service (PMS) est supérieure à 16 bar. Les vannes de commande et les soupapes de sûreté sont exclues du domaine d'application de la présente Norme européenne. La présente Norme européenne spécifie les exigences et les essais de vérification appropriés réalisés en cours de production et à des fins de certification afin de démontrer que les appareils de robinetterie sont conformes aux exigences. Un récapitulatif des essais sur produit et des essais de type est donné en Annexe H. La présente Norme européenne fait référence à l'EN 13942. Sauf spécification contraire, il convient de satisfaire à toutes les exigences de cette norme. Les paragraphes marqués du symbole [] contiennent des exigences identiques à celles de l'EN 13942. Des exigences et essais nationaux supplémentaires conformes à différentes réglementations nationales non encore harmonisées peuvent se révéler nécessaires et doivent être indiqués dans le bon de commande.
Armature za transport zemeljskega plina po cevovodih - Zahteve glede uporabnosti in preskušanje
Ta evropski standard velja za vse ventile (s svečko, krogelne pipe, zasune in protipovratne ventile), ki se uporabljajo pri kopenskih cevovodih za prenos naravnega plina v skladu s standardom EN 1594, vendar z različnim temperaturnim obsegom glede na naslednje tri razrede v skladu s standardom EN 682: 1) –10 °C do 60 °C; 2) –20 °C do 60 °C; 3) obseg, ki ga navede dobavitelj za posebno izvedbo. Ta evropski standard vključuje vse ventile, ki so sestavni deli cevovoda. Ta evropski standard določa ventile za cevovode z najvišjim obratovalnim tlakom (MOP) nad 16 barov. Krmilni in varnostni ventili so izključeni s področja uporabe tega evropskega standarda. Ta evropski standard določa zahteve in ustrezne preskuse, ki se izvajajo med proizvodnjo in za namene certifikacije, da se preveri skladnost ventilov z zahtevami. Povzetek izdelka in tipski preskusi so navedeni v prilogi G. Ta evropski standard se sklicuje na standard EN 13942. Izpolnjene morajo biti vse zahteve standarda EN 13942, razen če je navedeno drugače. Odstavki, označeni s piko [•], označujejo zahteve, ki so enake v standardu EN 13942. Potrebne so lahko dodatne nacionalne zahteve in preskusi v skladu s posameznimi nacionalnimi zakonskimi predpisi, ki še niso usklajeni, in se priporočijo na naročilnici.
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Armature za transport zemeljskega plina po cevovodih - Zahteve glede uporabnosti in preskušanjeArmaturen für den Transport von Erdgas in Fernleitungen - Anforderungen an die Gebrauchstauglichkeit und deren PrüfungRobinetterie pour le transport de gaz naturel par des pipelines - Exigences de performance et essaisValves for natural gas transportation in pipelines - Performance requirements and tests75.200Petroleum products and natural gas handling equipment23.060.01Ventili na splošnoValves in generalICS:Ta slovenski standard je istoveten z:EN 14141:2013SIST EN 14141:2013en,fr,de01-september-2013SIST EN 14141:2013SLOVENSKI
STANDARDSIST EN 14141:20041DGRPHãþD
SIST EN 14141:2013
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 14141
June 2013 ICS 23.060.01; 75.200 Supersedes EN 14141:2003English Version
Valves for natural gas transportation in pipelines - Performance requirements and tests
Robinetterie pour le transport de gaz naturel par des pipelines - Exigences de performance et essais
Armaturen für den Transport von Erdgas in Fernleitungen -Anforderungen an die Gebrauchstauglichkeit und deren Prüfung This European Standard was approved by CEN on 18 April 2013.
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, Former Yugoslav Republic of Macedonia, 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 © 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14141:2013: ESIST EN 14141:2013
EN 14141:2013 (E) 2 Contents Page Foreword .3 Introduction .4 1 Scope .5 2 Normative references .5 3 Terms and definitions .7 4 Functional requirements .8 5 Requirements and tests .9 6 Inspection . 23 7 Quality . 23 8 Type tests . 23 9 Functional and other qualification tests . 23 10 Marking . 24 Annex A (normative)
Type test on general design and production of pipeline valves . 25 Annex B (normative)
Strength test on torque/thrust . 30 Annex C (normative)
Functional test on clean gas (on option) . 31 Annex D (normative)
Functional test for abrasion resistance to dirty service of ball valves (on option) . 32 Annex E (normative)
Wall thickness measurement . 34 Annex F (informative)
Additional requirements . 35 Annex G (informative)
Summary of tests on product and type tests . 36 Bibliography . 41
SIST EN 14141:2013
EN 14141:2013 (E) 3 Foreword This document (EN 14141:2013) 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 December 2013, and conflicting national standards shall be withdrawn at the latest by December 2013. 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 14141:2003. The main changes compared to the previous edition are listed below: — the scope was adjusted and revised; — Clause 5 was specified and revised; — Clause 10 was added; — Annexes B, F and G were added; — entire document was editorially revised and adjusted. 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, Former Yugoslav Republic of Macedonia, 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 14141:2013
EN 14141:2013 (E) 4 Introduction CEN/TC 69/WG 9 has been responsible for the development of a European performance standard of valves for use in pipelines for transportation of natural gas in accordance with EN 1594. The significant properties of valves designed for a special application are defined by performance requirements accompanied by the description of tests to be carried out: — by the manufacturer on the product during the manufacture; and — by an independent accepted body on test samples for certification purposes; to give proof that the valve meets the performance requirements of this European Standard. A type test is included in this European Standard to satisfy the requirements of EN 1594. SIST EN 14141:2013
EN 14141:2013 (E) 5 1 Scope This European Standard applies to all valves (plug, ball, gate and check valves) used in onshore transmission pipelines for transport of natural gas in accordance with EN 1594, but with a differing temperature range according to the following three classes in accordance with EN 682: 1) - 10 °C to 60 °C; 2) - 20 °C to 60 °C; 3) the range stated by the purchaser for special design. This European Standard comprises all valves which are components of the pipeline. This European Standard specifies valves for pipelines with a maximum operating pressure (MOP) over 16 bar. Control valves and safety valves are excluded from the scope of this European Standard. This European Standard specifies requirements and appropriate verification tests carried out during production and for certification purposes to verify that the valves conform to the requirements. A summary of the product and type tests is given in Annex G. This European Standard makes reference to EN 13942. All the requirements of EN 13942 should be met unless otherwise stated. Paragraphs marked with a dot [•z indicate requirements which are identical to EN 13942. Additional national requirements and tests in accordance with individual national legal regulations not yet harmonised may be necessary and are to be advised in the purchase order. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 19, Industrial valves - Marking of metallic valves EN 549, Rubber materials for seals and diaphragms for gas appliances and gas equipment EN 558, 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 571-1, Non destructive testing - Penetrant testing - Part 1: General principles EN 682, Elastomeric Seals - Materials requirements for seals used in pipes and fittings carrying gas and hydrocarbon fluids 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 736-3:2008, Valves - Terminology - Part 3: Definition of terms EN 1369:2012, Founding - Magnetic particle testing EN 1371-1:2011, Founding - Liquid penetrant testing- Part 1: Sand, gravity die and low pressure die castings SIST EN 14141:2013
EN 14141:2013 (E) 6 EN 1435:1997, Non-destructive examination of welds — Radiographic examination of welded joints EN 1503-1, Valves - Materials for bodies, bonnets and covers - Part 1: Steels specified in European Standards EN 1503-2, Valves - Materials for bodies, bonnets and covers - Part 2: Steels other than those specified in European Standards EN 1515-1, Flanges and their joints - Bolting - Part 1: Selection of bolting EN 1515-2, Flanges and their joints - Bolting - Part 2: Classification of bolt materials for steel flanges, PN designated EN 1594, Gas supply systems - Pipelines for maximum operating pressure over 16 bar - Functional requirements EN 10204:2004, Metallic products - Types of inspection documents EN 10228-1:1999, Non-destructive testing of steel forgings - Part 1: Magnetic particle inspection EN 10228-2:1998, Non-destructive testing of steel forgings - Part 2: Penetrant testing EN 10228-3:1998, Non-destructive testing of steel forgings - Part 3: Ultrasonic testing of ferritic or martensitic steel forgings EN 10228-4, Non-destructive testing of steel forgings - Part 4: Ultrasonic testing of austenitic and austenitic-ferritic stainless steel forgings EN 12266-1:2012, Industrial valves - Testing of metallic valves - Part 1: Pressure tests, test procedures and acceptance criteria - Mandatory requirements EN 12516-1, Industrial valves - Shell design strength - Part 1: Tabulation method for steel valve shells EN 12516-2, Industrial valves - Shell design strength - Part 2: Calculation method for steel valve shells EN 12516-3, Valves - Shell design strength - Part 3: Experimental method EN 12517-1:2006, Non-destructive testing of welds - Part 1: Evaluation of welded joints in steel, nickel, titanium and their alloys by radiography - Acceptance levels EN 12627:1999, Industrial valves - Butt welding ends for steel valves EN 12681, Founding - Radiographic examination EN 12982, Industrial valves - End-to-end and centre-to-end dimensions for butt welding end valves EN 13942:2009, Petroleum and natural gas industries - Pipeline transportation systems - Pipeline valves (ISO 14313:2007 modified) EN ISO 148-1, Metallic materials - Charpy pendulum impact test - Part 1: Test method (ISO 148-1) EN ISO 5210, Industrial valves - Multi-turn valve actuator attachments (ISO 5210) EN ISO 5211, Industrial valves - Part-turn actuator attachments (ISO 5211) EN ISO 9712:2012, Non-destructive testing - Qualification and certification of NDT personnel (ISO 9712:2012) SIST EN 14141:2013
EN 14141:2013 (E) 7 EN ISO 10497, Testing of valves - Fire type-testing requirements (ISO 10497) EN ISO 11666:2010, Non-destructive testing of welds - Ultrasonic testing - Acceptance levels (ISO 11666:2010) EN ISO 17637, Non-destructive testing of welds - Visual testing of fusion-welded joints (ISO 17637) EN ISO 17638, Non-destructive testing of welds - Magnetic particle testing (ISO 17638) EN ISO 17640:2010, Non-destructive testing of welds - Ultrasonic testing - Techniques, testing levels, and assessment (ISO 17640:2010) EN ISO 23277:2009, Non-destructive testing of welds - Penetrant testing of welds - Acceptance levels (ISO 23277:2006) EN ISO 23278:2009, Non-destructive testing of welds — Magnetic particle testing of welds — Acceptance levels (ISO 23278:2006) MSS-SP-55-20061), Quality standard for steel castings for valves, flanges and fittings and other piping components (visual method for evaluation of surface irregularities) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 736-1:1995, EN 736-2:1997, EN 736-3:2008 and EN 13942:2009 and the following apply. 3.1 full opening valve [•] valve with an unobstructed opening capable of allowing a sphere or other internal devices of the same nominal size as the valve to pass 3.2 maximum pressure differential [•] (MPD) maximum difference between the upstream and downstream pressure across the obturator at which the obturator may be operated 3.3 reduced-opening valve [•] valve with the opening through the obturator smaller than at the end connection(s) 3.4 seating surfaces [•] contact surfaces of the obturator and seat which ensure valve sealing 3.5 stem [•] part that connects the obturator to the operator and which may consist of one or more components Note 1 to entry: This definition applies also for shafts. 3.6 test report
1) Developed and approved by the Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. 127 Park Street, NE, Vienna, Virginia 22180. SIST EN 14141:2013
EN 14141:2013 (E) 8 written statement comprising the results of the particular tests for the evaluation of the conformity of a range of valves to this European Standard 3.7 type test test carried out on one or more valves representative of the design and the manufacturing process to confirm conformance of the manufactured valves with specified requirements Note 1 to entry: A range may include valves of the same design, the same material group and the same manufacturing method but with different size designations and different allowable pressures. 3.8 type test certification granting of a certificate by an independent accepted body to prove the conformity of a range of valves with a standard 3.9 piggability [•] capability of a valve to permit the unrestricted passage of a pig 4 Functional requirements 4.1 Travel stops [≤z Travel stops shall be provided on the valve and/or operator and they shall locate the position of the obturator in the open and closed position. The travel stops shall not affect the sealing capability of the valve. They shall not shift unintentionally. In case of lever operated valves, the travel stop shall be independent from the lever. 4.2 Position of the obturator [≤z Except for check valves, the position of the obturator shall not be altered by the dynamic forces of the passing flow or in the case of screw operated gate valves by forces generated from internal pressure. 4.3 Protection of exposed stems and shafts [≤z Extended and exposed stems and shafts of valves shall be protected against dust by a stem extension casing. 4.4 Piggability Valves for transmission pipelines shall be piggable unless otherwise agreed and shall conform to the definition of the full opening valve (3.1). The dimensions for the smallest full opening valve diameter are given in EN 13942:2009, Table 1. 4.5 Lifting lugs [≤z salves of size aN 200 (NPS 8) and larger shall be provided with lifting points, unless otherwise agreed. The manufacturer shall verify suitability of the lifting points. If the valve manufacturer is responsible for the supply of the valve and operator assembly, the valve manufacturer shall verify the suitability of the lifting points for the complete valve and operator assembly. If the purchaser is responsible for the supply of the operator assembly, the purchaser shall provide adequate information to enable the manufacturer to verify the suitability of the lifting points for the complete assembly. NOTE Regulatory requirements can specify special design, manufacturing and certification of lifting points. SIST EN 14141:2013
EN 14141:2013 (E) 9 4.6 Additional requirements The purchaser may require additional requirements for special conditions, see Annex F. 5 Requirements and tests 5.1 Design 5.1.1 Shell Requirement Verification on product Type test The design and dimensions of the valves shall be such as to withstand safely all stresses occurring under operating conditions. The shell design shall meet the requirements of EN 12516-1 or EN 12516-2 or EN 12516-3. Alternatively the requirements of other internationally recognised design codes or standards as per EN 13942 shall be met. NOTE The tabulation method according to EN 12516-1 is similar in approach to ASME B16.34 in that the designer can look up the required minimum wall thickness dimension of the valve body from a table. The manufacturer shall document the design validation of the valve and shall make it available for evaluation and approval on request. Design approval in accordance with A.4.3, respectively Annex E. 5.1.2 End-to-end dimensions Requirement Test on product Type test End-to-end dimensions of flanged and butt welding valves shall conform to EN 13942 or EN 558 or EN 12982. In case of EN 558 or EN 12982 the purchaser shall indicate the series to be supplied. Dimensional check. Test in accordance with A.4.3. 5.1.3 Butt welding ends Requirement Test on product Type test Weld end details and thickness shall be in accordance with EN 12627:1999, Figures 2, 3, 4 and 5. The length of the butt end shall be sufficient to allow welding without damage of the internal parts of the valve. The valve supplier shall specify the maximum acceptable welding temperature. Where this cannot be achieved, use extension of pipe section (minimum length 50 mm + 4 × s). Dimensional check on drawing and product. Drawing examination in accordance with A.4.3. SIST EN 14141:2013
EN 14141:2013 (E) 10 5.1.4 Anti-blow-out feature Requirement Test on product Type test [•z Valves shall be designed with a stem anti-blow out device to prevent stem ejection by internal pressure when the stem packing and/or retainer has been removed. Drawing examination. Drawing examination in accordance with A.4.3. 5.1.5 Sealant injection systems Requirement Test on product Type test The sealing injection system shall be provided for seats and/or stem if specified by the purchaser.
If a sealant injection system is provided, it shall be equipped with:
— a check valve located on the body at each injection point;
— a universal giant button head fitting Î 22 mm to connect sealant injection gun. Drawing examination. Drawing examination. The seat sealant injection system shall be capable of distributing sealant uniformly around the seats.
Type test is applicable only to ball valves. A trial sealant injection is performed and the valve inspected to confirm adequate delivery and even distribution of sealant.
The test is conducted on a closed valve with 50 % maximum differential pressure applied using a sealant recommended by the manufacturer. The valve should be inspected to determine distribution. The sealant should form a continuous ring on the surface of the obturator. 5.1.6 Extended drain, vent and sealant lines Requirement Type test Test on product [≤z arainf vent and sealant lines shall be provided if specified and shall be extended by means of rigid pipework, if necessary. The lines shall be fastened to the valve and/ or extensions and terminate close to the stem extension top works, by agreement. Drawing examination. Drawing examination. Hydraulic pressure test at 1,5 times the rated pressure of the valve. The test may be conducted as a part of valve shell test or as a test of the preassembled pipework The welded connection to the valve body shall be inspected according to 5.5.2. [≤z arain and vent lines shall: 1) have a design pressure not
SIST EN 14141:2013
EN 14141:2013 (E) 11 Requirement Type test Test on product less than the rated pressure of the valve on which they are installed; 2) be capable of withstanding the hydrostatic shell test pressure of the valve; 3) be designed in accordance with a recognised design code; 4) be suitable for blow-down operation, where applicable. Sealant lines shall have a design pressure not less than the greater of the pipeline valve rated pressure and the injection pressure. The purchaser should specify the injection pressure or the pipe for use. If not specified by the purchaser, the manufacturer shall advise the maximum injection pressure for the system. The size of the sealant lines shall be by agreement. Prior to assembly, the internal bores of sealant lines shall be clean and free from rust and any foreign particles. Drain and vent connections on valves: 1) They shall be fitted with at least one isolating valve; 2) Connection to the valve body shall be welded; 3) Connection to the first valve shall be welded; 4) Minimum pipe size shall be as follows: — DN ≤ 100 – DN 15 (½") drain; — DN 150 + 200 – DN 20 (¾") drain; — aN ≥ 250 – DN 25 (1") drain. Each sealant injection line — shall be welded to the valve body; — shall incorporate a check valve at the point of connection to the valve body; — shall incorporate an isolating valve; — shall terminate in a giant button head fitting SIST EN 14141:2013
EN 14141:2013 (E) 12 Requirement Type test Test on product Î 22 mm. Prior to assembly the internal bores of sealant lines shall be chemically or mechanically cleaned. 5.1.7 Vent, drain and sealant valves Requirement Test on product Type test [≤z arain and vent block valves shall be provided, if specified. They shall have a rated pressure not less than the valve on which they are installed and be suitable for blow-down operation. Block and check valves fitted to sealant injection lines shall be rated for the greater of the pipeline valve rated pressure and the injection pressure defined in 5.1.6. No test required. No test required. 5.1.8 Mechanical resistance against excessive actuating forces Requirement Test on product Type test [•z The design thrust or torque for all drive train calculations shall be at least two times the break away thrust or torque (see 5.2.4). No test required In accordance with Annex B. 5.1.9 Body/bonnet connection Requirement Test on product Type test Bonnet seals shall be anti-blow-out design. The connection shall be frost proof, i.e. shall be tight against moisture penetrating from the outside and protected from corrosion. Visual check of drawing. Visual check of drawing. 5.1.10 Interface of valves to actuators of gears Requirement Test on product Type test Interface of valve to actuator/gear shall have the interface dimension of: — EN ISO 5211 for quarter turn valves — EN ISO 5210 for multi-turn valves Dimensional check. Drawing examination. SIST EN 14141:2013
EN 14141:2013 (E) 13 5.1.11 Stem extensions Requirement Test on product Type test Stem extension shall be provided generally on the valve to be laid underground so that to manoeuvre the valve above ground or for similar situation. The length of the stem extension shall be indicated by the purchaser. The stem extension is composed by an extension for the manoeuvre and by a casing (housing) for the protection of stem extension the support of actuator/gear and for giving contrast to the forces generated by the manoeuvre. The stem extension shall be designed to resist the same torque/trust of the drive train (see 5.1.8) The connection of the stem extension casing to the valve end to the actuator/gear shall have the same interface of valve to actuator given in 5.1.10. The stem extension casing shall be equipped with a device to release pressure in case of leakage from the stem sealing system.
ot agreed in different way, the length of the stem extension is defined to be the distance between the horizontal axis of the passage and the axis of the wheel of the gear or of the lever. Dimensional check. Drawing examination. SIST EN 14141:2013
EN 14141:2013 (E) 14
5.2 Operation 5.2.1 Handwheels and wrenches - Levers Requirement Test on product Type test [•z Wrenches for valves shall either be of an integral design or consist of a head which fits on the stem and is designed to take an extended handle. The head design shall allow permanent attachment of the extended section if specified by the purchaser. The maximum force required at the handwheel or wrench to apply the breakaway torque or thrust shall not exceed 360 N (80 lbf). Wrenches of integral design (not loose) shall not be longer than twice the face-to-face or end-to-end dimension, unless otherwise agreed. NOTE Loose wrenches are not considered part of the valve and are not required to meet the maximum length requirements. Handwheel diameter(s) shall not exceed the face-to-face or end-to-end length of the valve or 1 000 mm, whichever is smaller, unless otherwise agreed. Except for valve sizes DN 40 (NPS 1½) and smaller, spokes shall not extend beyond the perimeter of the handwheel unless otherwise agreed. If specified by the purchaser, the handwheel of the gearbox input shaft shall be provided with a torque-limiting device, such as a shear pin, to prevent damage to the drive train. Direction of closing shall be clockwise, unless otherwise specified. For each unique size pressure rating, material, operator combination, the following test shall be performed on 10 % (minimum of 1) of the production: — dimensional check of handwheel/lever; — determination of the handwheel/lever force to apply break away torque or thrust. No test required. 5.2.2 Protection against rapidly moving external components Requirement Test on product Type test Rapidly moving external components, e.g. rising stems, piston rods or levers on check valves, shall be fitted with protective devices (e.g. protective tubes or protective screens), for personal protection. Visual inspection. No test required. SIST EN 14141:2013
EN 14141:2013 (E) 15
5.2.3 Manual override devices Requirement Test on product Type test Manual override devices, e.g. handwheels of electric actuators, shall be normally disengaged and shall automatically disengage when the actuator is operated. Visual inspection. No test required. 5.2.4 Torque/thrust testing Requirement Test on product Type test The torque values shall be measured and documented. Measured operating torques/thrust shall not exceed the agreed values. Torque/thrust shall be measured and recorded. — EN 13942:2009, B.6 shall be applied. — The test shall be conducted with liquid or gas in accordance with seat test in 5.8.1. A soft seated valve shall be left in the closed position with the rated differential pressure applied for 12 h after which the operating torque/thrust shall be measured and shall not exceed the agreed values. 5.3 Materials 5.3.1 Material compatibility Requirement Test on product Type test All metallic and non-metallic parts in contact with natural gas and accessory materials, as well as lubricants and sealants, shall be suitable for the service conditions specified by the purchaser and compatible with the fluids used in service and maintenance. Non-metallic parts of valves to be used at pressure of PN 100 (Class 600) and above shall be resistant to explosive decompression. Materials shall be compatible with each other and with the fluids, to avoid galvanic action and galling. No test required. Examination of documentation produced to demonstrate the compatibility of the seal. SIST EN 14141:2013
EN 14141:2013 (E) 16
5.3.2 Shell materials 5.3.2.1 General Requirement Test on product Type test Shell materials shall be selected from steels in accordance with EN 1503-1, EN 1503-2 and EN 13942. Other steels not listed in these standards may be used when their suitability and allowable operating pressure and temperatures have been approved. Certificate in accordance with EN 10204:2004, 3.1a. Certificates in accordance with EN 10204:2004, 3.2 a Purchaser may request superior certificates. 5.3.2.2 Impact values Requirement Test on product Type test All ferritic and duplex materials for pressure containing parts and welds shall have impact values as specified in EN 1594. The test temperature shall correspond to the minimum design temperature or –10 °C whichever is lower. All ferritic and duplex materials for pressure containing parts shall be tested in accordance with the impact test prov
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Questions, Comments and Discussion
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