SIST EN 334:2005
(Main)Gas pressure regulators for inlet pressures up to 100 bar
Gas pressure regulators for inlet pressures up to 100 bar
This document specifies constructional and functional requirements, regulator sizing, testing, documentation and marking of gas pressure regulators used in the pressure regulating stations:
- for inlet pressures up to 100 bar and nominal diameters up to DN 400;
- for an operating temperature range from 20 °C to +60 °C,
which operate with fuel gases of the 1st and 2nd family in accordance with EN 437 in transmission and distribution networks and also in commercial and industrial installations.
"Gas pressure regulators" hereafter will be called "regulators" except in the titles.
The harmonised part of this document deals with standard gas pressure regulators used in pressure regulating stations complying with EN 12186 or EN 12279. For gas pressure regulators integral strength type when used in pressure regulating stations complying with EN 12186 or EN 12279, Annex ZA lists all applicable Essential Requirements except the external resistance to environmental conditions where corrosion occurs.
This document considers the following classes of regulators:
- class 1: operating temperature range from 10 °C to 60 °C;
- class 2: operating temperature range from 20 °C to 60 °C.
This document applies to regulators which use the pipeline gas as a source of control energy unassisted by any external power source.
The regulator may incorporate a creep (venting) relief device, complying with the requirements in Annex F.
The regulators complying with the requirements of this document may be declared as "in compliance with EN 334" and bear the mark "EN 334".
This document does not apply to:
- regulators upstream from/on/in domestic gas consuming appliances which are installed downstream of domestic gas meters;
- regulators in accordance with prEN xxxxxx (WI 00235003 under preparation by CEN/TC 235) that comply with both of the following characteristics:
- volumetric flow rate L 200 m3/h at normal conditions;
- inlet pressure L 5 bar;
- regulators for which a specif
Gas-Druckregelgeräte für Eingangsdrücke bis 100 bar
Diese europäische Norm legt Bauanforderungen, Funktionsanforderungen, Dimensionierung, Prüfung, Dokumentation und Kennzeichnung von Gas-Druckregelgeräten, die in den Druckregelanlagen nach EN 12186 und EN 12279 verwendet werden, fest für:
- Eingangsdrücke bis 100 bar und Nennweiten bis DN 400,
- Betriebstemperaturen von -20 °C bis +60 °C,
soweit sie mit Brenngasen der 1. und 2. Familie nach EN 437 (außer Gase der 3. Familie in der Flüssigphase) in Gasversorgungsnetzen wie auch in gewerblichen und industriellen Anlagen betrieben werden.
"Gas-Druckregelgeräte" wird im Weiteren, außer in Überschriften, mit "Regelgeräte" abgekürzt.
Der harmonisierte Teil dieser Europäischen Norm gilt für Gas-Druckregelgeräte mit einheitlichem Festigkeitsbereich, die in den Druckregelanlagen in Übereinstimmung mit den jeweils zutreffenden EN 12186 oder EN 12279 verwendet werden. Die Tabelle ZA.1 des informativen Anhanges ZA schließt alle relevanten grundlegenden Anforderungen nach Anhang 1 der DGR ein, mit Ausnahme der Beständigkeit gegen Umwelteinflüsse im Korrosionsfall.
Diese Europäische Norm behandelt die folgenden Klassen von Regelgeräten:
Temperaturklassen:
- Klasse 1: Betriebstemperaturbereich von -10 °C bis 60 °C,
- Klasse 2: Betriebstemperaturbereich von -20 °C bis 60 °C.
Diese Europäische Norm gilt für Regelgeräte, deren Energie für die Regelung ohne Unterstützung externer Energiequellen dem fortgeleiteten Gas entnommen wird.
Wenn ein Regelgerät mit einer integrierten Abblaseinrichtung für Leckgas ausgerüstet ist, muss es die Anforderungen von Anhang F erfüllen.
Regelgeräte, die den Anforderungen dieser Europäischen Norm entsprechen, dürfen als "in Übereinstimmung mit EN 334" deklariert und mit der Kennzeichnung "EN 334" versehen werden.
Diese Europäische Norm gilt nicht für:
- Regelgeräte vor/an/in Gasgeräten des Haushalts, die hinter Haushaltgaszählern installiert sind,
- Regelgeräte in Übereinstimmung mit prEN xxxxxx (WI 00235003 in Vorbereitung beim CEN/T
Appareils de régulation de pression de gaz (régulateurs) pour des pressions amont jusqu'a 100 bar
Le présent document spécifie les exigences relatives a la construction et au fonctionnement, au dimensionnement, aux essais, a la documentation et au marquage des appareils de régulation de pression de gaz (régulateurs) utilisés avec les postes de détente-régulation de pression :
- pour les pressions amont jusqu'a 100 bar et les diametres nominaux jusqu'a DN 400 ;
- pour une plage de température ambiante de 20 °C a +60 °C ;
qui sont exploités avec des gaz combustibles de la premiere et de la deuxieme famille conformément a l'EN 437 dans les réseaux de transport et de distribution ainsi que dans les installations commerciales et industrielles.
Dans la suite du présent document, les "appareils de régulation de pression de gaz" sont désignés par le terme "régulateurs", a l'exception des titres.
La partie harmonisée du présent document traite des appareils de régulation de pression de gaz standard utilisés avec les postes de détente-régulation de pression conformes a l'EN 12186 ou a l'EN 12279. Pour les appareils de régulation de pression de gaz a résistance intégrale utilisés avec les postes de détente régulation de pression conformes a l'EN 12186 ou a l'EN 12279, l'Annexe ZA énumere toutes les exigences essentielles applicables, a l'exception de la résistance externe aux conditions environnementales en cas de corrosion.
Le présent document traite des classes suivantes de régulateurs :
- classe 1 : plage de température de service comprise entre 10 °C et 60 °C ;
- classe 2 : plage de température de service comprise entre 20 °C et 60 °C.
Le présent document s'applique aux régulateurs qui utilisent comme source d'énergie de commande le gaz prélevé dans les canalisations sans l'assistance d'aucune source extérieure d'alimentation que ce soit.
Le régulateur peut comporter une soupape a débit partiel conforme aux prescriptions de l'Annexe F.
Regulatorji tlaka plina za vstopne tlake do 100 bar
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Gas pressure regulators for inlet pressures up to 100 barRegulatorji tlaka plina za vstopne tlake do 100 barAppareils de régulation de pression de gaz (régulateurs) pour des pressions amont jusqu'a 100 barGas-Druckregelgeräte für Eingangsdrücke bis 100 barTa slovenski standard je istoveten z:EN 334:2005SIST EN 334:2005en,fr,de23.060.40ICS:SIST EN 334:2000/A1:2003SIST EN 334:20001DGRPHãþDSLOVENSKI
STANDARDSIST EN 334:200501-junij-2005
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 334
March 2005 ICS 23.060.40 Supersedes EN 334:1999 English version
Gas pressure regulators for inlet pressures up to 100 bar
Appareils de régulation de pression de gaz (régulateurs) pour des pressions amont jusqu'à 100 bar
Gas-Druckregelgeräte für Eingangsdrücke bis 100 bar This European Standard was approved by CEN on 23 December 2004.
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 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 translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions.
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, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36
B-1050 Brussels © 2005 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 334:2005: E
EN 334:2005 (E) 2 Contents page Foreword.5 1 Scope.6 2 Normative references.7 3 Terms, definitions and symbols.8 3.1 Terms and definitions.8 3.2 Control variables.13 3.3 Operating features in stable conditions.15 3.4 Further functional terminology.19 4 Construction requirements.21 4.1 Basic requirements.21 4.1.1 General.21 4.1.2 Gas pressure regulators with integrated safety devices.21 4.1.3 End connections.22 4.1.4 Flange ratings.22 4.1.5 Nominal sizes and face-to-face dimensions.23 4.1.6 Sealing of the adjusting device.26 4.1.7 Replacement of part affected by erosion or abrasion.26 4.2 Materials.26 4.2.1 Requirements for metallic materials.26 4.2.2 Requirements for elastomers (including vulcanized rubbers).31 4.2.3 Requirements for non metallic materials different from those in 4.2.2.31 4.3 Strength of housings.32 4.3.1 Body and its inner metallic partition walls.32 4.3.2 Other pressure containing parts for integral strength pressure regulators.32 4.3.3 Other pressure containing parts for differential strength pressure regulators.32 4.3.4 Inner metallic partition walls.33 4.3.5 Minimum values of safety factor.33 4.3.6 Welded joint coefficient.33 5 Functional requirements.34 5.1 General.34 5.1.1 Mounting position.34 5.1.2 Sound emission.34 5.2 Shell strength, external tightness and internal sealing.35 5.2.1 Shell strength.35 5.2.2 External tightness.35 5.2.3 Internal sealing.35 5.3 Control classifications.36 5.3.1 Accuracy under stable conditions.36 5.3.2 Lock-up behaviour.36 5.3.3 Stable conditions.37 5.4 Final visual inspection.37 5.5 Fail-close conditions.37 6 Gas pressure regulator sizing.37 6.1 Flow behaviour.37 6.2 Sizing equations for the calculation of volumetric flow rates of a gas pressure regulator with its control member in its mechanically fully open position.38 6.2.1 Normal calculations.38
EN 334:2005 (E) 3 6.2.2 Practical calculations.38 6.2.3 Simplified calculations.39 6.3 Calculation of the maximum accuracy flow rate.39 6.4 Inherent flow characteristics.39 6.5 Calculation of volumetric flow rates for partially open gas pressure regulators.40 6.6 Flow coefficient.40 7 Testing.40 7.1 General.40 7.2 Tests.40 7.3 Type test.41 7.4 Selection of test samples.42 7.5 Routine tests.42 7.6 Production surveillance.42 7.7 Test and verification methods.42 7.7.1 Dimensional check and visual inspection.42 7.7.2 Materials check.42 7.7.3 Verification of the strength of pressure containing parts and inner metallic partition walls.43 7.7.4 Shell and inner metallic partition walls strength test.44 7.7.5 Alternative shell and inner metallic partition walls strength test.45 7.7.6 External tightness test.45 7.7.7 Functional tests.46 7.7.8 Final visual inspection.58 8 Documentation.58 8.1 Documentation related to type test.58 8.1.1 Documentation required prior to type test.58 8.1.2 Test report.58 8.2 Documentation related to the routine tests.58 8.2.1 Documentation provided at the request of the customer.58 8.2.2 Documentation provided with the regulator.59 8.3 Documentation related to production surveillance in accordance with 7.6.59 8.3.1 Documentation to be available for production surveillance.59 8.3.2 Production surveillance report.59 9 Marking.60 9.1 General requirements.60 9.2 Markings for the various connections.61 9.3 Marking of integrated safety devices.61 Annex A (informative)
Alternative methods for the determination of the accuracy class, the lock-up pressure class, the maximum accuracy flow rate, the flow coefficients and the verification of the hysteresis band.62 A.1 General.62 A.2 Test methods.62 A.2.1 Direct acting gas pressure regulator.62 A.2.2 Pilot controlled gas pressure regulators.63 A.3 Determination of flow coefficients for larger capacity regulators.64 Annex B (informative)
Inspection certificate.70 Annex C (informative)
Acceptance test.72 Annex D (informative)
Compliance evaluation).73 D.1 General.73 D.2 Introduction.73 D.3 Procedure.73 D.4 Manufacturer’s compliance evaluation.74 D.5 Issue of the certificate of compliance.74 Annex E (informative)
Seat leakage.75 Annex F (normative)
Creep (venting) relief device.76 F.1 General.76
EN 334:2005 (E) 4 F.2 Terms and definitions.76 F.3 Requirements.76 F.3.1 Construction.76 F.3.2 Functional requirements.76 F.4 Testing.76 F.5 Type test.77 F.6 Routine tests.77 F.7 Documentation.77 F.8 Marking.77 Annex G (informative)
Order specification.78 G.1 General.78 G.2 Minimum specifications.78 G.2.1 Details of construction.78 G.2.2 Dimensions.78 G.2.3 Performance.78 G.3 Optional specifications.79 Annex H (normative)
Materials.80 H.1 Steel materials for pressure containing parts and inner metallic partition walls.80 H.2 Metallic materials different from steel materials for pressure containing parts and inner metallic partition walls.86 H.3 Materials for fixtures, integral process and sensing lines, connectors and fasteners.91 Annex ZA (informative)
Relationship between this European Standard and the Essential Requirements of EU Directive 97/23/EC.94 Bibliography.95
EN 334:2005 (E) 5 Foreword This document (EN 334:2005) has been prepared by Technical Committee CEN/TC 235 “Gas pressure regulators and associated safety devices for use in gas transmission and distribution”, the secretariat of which is held by UNI. 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 September 2005, and conflicting national standards shall be withdrawn at the latest by September 2005. This document supersedes EN 334:1999. 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 97/23/EC. For relationship with EU Directive 97/23/EC, see informative Annex ZA, which is an integral part of this document. Gas pressure regulators dealt with in this document are standard gas pressure regulators and, when used in pressure regulating stations complying with EN 12186 or EN 12279, they are considered as standard pressure equipment in accordance with Clause 3.1 of Art. 1 of Pressure Equipment Directive 97/23/EC (PED). For standard gas pressure regulators used in pressure regulating stations complying with EN 12186 or EN 12279, Table ZA.1 given in Annex ZA includes all applicable Essential Requirements given in Annex I of PED, except the external resistance to environmental conditions where corrosion occurs. The normative Annex H of this document lists some suitable materials for pressure containing parts, inner metallic partition walls, fasteners and connectors. Other materials may be used when complying with the restrictions given in Table 5. Gas pressure regulators complying with this document do not need protection against exceeding their allowable limit of pressure if the maximum downstream incidental pressure (MIPd) of the upstream gas pressure regulating station is less than or equal to 1,1 times the maximum allowable pressure (PS) of the regulator itself. The continuing integrity of gas pressure regulators is assured by periodic functional checks. For periodic functional checks it is common to refer to national regulations/standards where existing or users/manufacturers practices. 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, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EN 334:2005 (E) 6 1 Scope This document specifies constructional and functional requirements, regulator sizing, testing, documentation and marking of gas pressure regulators used in the pressure regulating stations: for inlet pressures up to 100 bar and nominal diameters up to DN 400; for an operating temperature range from -20 °C to +60 °C, which operate with fuel gases of the 1st and 2nd family in accordance with EN 437 in transmission and distribution networks and also in commercial and industrial installations. "Gas pressure regulators" hereafter will be called "regulators" except in the titles. The harmonised part of this document deals with standard gas pressure regulators used in pressure regulating stations complying with EN 12186 or EN 12279. For gas pressure regulators integral strength type when used in pressure regulating stations complying with EN 12186 or EN 12279, Annex ZA lists all applicable Essential Requirements except the external resistance to environmental conditions where corrosion occurs. This document considers the following classes of regulators: class 1: operating temperature range from -10 °C to 60 °C; class 2: operating temperature range from -20 °C to 60 °C. This document applies to regulators which use the pipeline gas as a source of control energy unassisted by any external power source. The regulator may incorporate a creep (venting) relief device, complying with the requirements in Annex F. The regulators complying with the requirements of this document may be declared as "in compliance with EN 334" and bear the marking “EN 334”. This document does not apply to: regulators upstream from/on/in domestic gas-consuming appliances which are installed downstream of domestic gas meters; regulators in accordance with prEN xxxxxx (WI 00235003 under preparation by CEN/TC 235); regulators for which a specific document exists (e.g. EN 88, etc.); industrial process control valves in accordance with EN 1349.
EN 334:2005 (E) 7 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 amendments) applies. EN 287 (all parts), Qualification test of welders - Fusion welding. EN 288 (all parts), Specification and approval of welding procedures for metallic materials. EN 473, Non destructive testing – Qualification and certification of NDT personnel – General principles. EN 571-1, Non destructive testing – Penetrant testing – Part 1: General principles. EN 970, Non-destructive examination of fusion welds – Visual examination. EN 1289, Non-destructive examination of welds – Penetrant testing of welds – Acceptance levels. EN 1290, Non-destructive examination of welds – Magnetic particle examination of welds. EN 1291, Non-destructive examination of welds – Magnetic particle testing of welds – Acceptance levels. EN 1349, Industrial process control valves. EN 1418, Welding personnel – Approval testing of welding operators for fusion welding and resistance weld setters for fully mechanised and automatic welding of metallic materials. EN 1435, Non-destructive examination of welds – Radiographic examination of welded joints. EN 1712, Non-destructive examination of welds – Ultrasonic examination of welded joints – Acceptance levels. EN 1713, Non-destructive examination of welds – Ultrasonic examination – Characterization of indications in welds. EN 1714, Non- destructive examination of welds – Ultrasonic examination of welded joints. EN 10045-1, Metallic materials – Charpy impact test – Part 1: Test method. EN 10204, Metallic products – Types of inspection documents. EN 12186, Gas supply systems – Gas pressure regulating stations for transmission and distribution – Functional requirements. EN 12279, Gas supply systems – Gas pressure regulating installations on service lines – Functional requirements. EN 12517, Non-destructive examination of welds – Radiographic examination of welded joints – Acceptance levels. EN 12627, Industrial valves – Butt welding ends for steel valves. EN 13445-4, Unfired pressure vessels – Part 4: Fabrication. EN 14382, Safety devices for gas pressure regulating stations and installations – Gas safety shut-off devices for inlet pressures up to 100 bar.
EN 334:2005 (E) 8 EN 60534-1:1993, Industrial-process control valves – Part 1: Control valve terminology and general considerations (IEC 60534-1:1987). EN 60534-2-1, Industrial-process control valves – Part 2-1: Flow capacity – Sizing equations for fluid flow under installed conditions (IEC 60534-2-1:1998). EN 60534-2-3, Industrial-process control valves – Part 2-3: Flow capacity – Test procedures (IEC 60534-2-3:1997). EN ISO 175:2000, Plastics – Methods of test for the determination of the effects of immersion in liquid chemicals (ISO 175:1999). EN ISO/IEC 17025:2000, General requirements for the competence of testing and calibration laboratories (ISO/IEC 17025:1999). ISO 7-1, Pipe threads where pressure tight joints are made on threads – Part 1: Dimensions, tolerances and designation. ISO 1817, Rubber, vulcanized – Determination of the effect of liquids. ISO 3419, Non-alloy and alloy steel butt-welding fittings. ISO 5752, Metal valves for use in flanged pipe systems – Face-to-face and centre-to-face dimensions. ISO 7005(all parts), Metallic flanges. ANSI/ASME B1.20.1:1983, Pipe threads, general purpose (inch). ASME B16.34:1996, Valves – Flanged, threaded and welding end. MSS SP 55:1985, Quality standard for steel castings for valves, flanges and fittings and other piping components (Visual method). 3 Terms, definitions and symbols 3.1 Terms and definitions For the purposes of this document, the terms and definitions given in EN 60534-1:1993 and the following apply. 3.1.1 gas pressure regulator device whose function is to maintain the value of the controlled variable (see 3.2.2.1) within its tolerance field irrespective of disturbance variables 3.1.1.1 direct acting gas pressure regulator regulator in which the net force required to move the control member is supplied directly by the controlled variable (see example in Figure 1)
EN 334:2005 (E) 9
Key 1 Setting element 6 Sensing line 2 Detector element 7 Regulator body 3 Breather/exhaust line 8 Valve seats 4 Actuator 9 Seat ring 5 Casing of actuator 10 Control member 1 + 2 = Controller Figure 1 — Example of a direct acting regulator 3.1.1.2 pilot controlled gas pressure regulator (indirect acting) regulator in which the net force required to move the control member is supplied by a pilot (see example in Figure 2)
EN 334:2005 (E) 10
Key 1 Fixture 6 Regulator body 2 Pilot 7 Valve seats 3 Actuator 8 Seat ring 4 Casing of actuator 9 Control member 5 Sensing/process line 10 Motorization chamber Figure 2 — Example of a pilot controlled regulator 3.1.1.3 monitor second regulator normally installed in series with an active regulato
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