EN 334:2019
(Main)Gas pressure regulators for inlet pressure up to 10 MPa (100 bar)
Gas pressure regulators for inlet pressure up to 10 MPa (100 bar)
This European Standard specifies constructional, functional, testing, marking, sizing and documentation requirements of gas pressure regulators:
- 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 as defined in EN 437:2003+A1:2009, used in the pressure regulating stations in accordance with EN 12186 or EN 12279, in transmission and distribution networks and also in commercial and industrial installations.
"Gas pressure regulators" hereafter will be called "regulators" except in the titles.
For standard regulators when used in pressure regulating stations complying with EN 12186 or EN 12279, the Annex ZA lists all applicable essential safety requirements of the European legislation on pressure equipment except external and internal corrosion resistance for applications in corrosive environment.
This document considers the following temperature classes/types of regulators:
- temperature class 1: operating temperature range from −10 °C to 60 °C;
- temperature class 2: operating temperature range from −20 °C to 60 °C;
- type IS: (integral strength type);
- type DS: (differential strength type).
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 second regulator, used as monitor, complying with the requirements in this document.
The regulator may incorporate a safety shut off device (SSD) complying with the requirements of EN 14382.
The regulator may incorporate a creep (venting) relief device, complying with the requirements in Annex E and/or a vent limiter, complying with the requirements in Annex I.
This document does not apply to:
- regulators upstream from/on/in domestic gas-consuming appliances which are installed downstream of domestic gas meters;
- regulators designed to be incorporated into pressure control systems used in service lines ) with volumetric flow rate ≤ 200 m3/h at normal conditions and inlet pressure ≤ 5 bar;
- regulators for which a specific document exists (e.g. EN 88-1 and EN 88-2, etc.);
- industrial process control valves in accordance with EN 1349.
The normative Annex G of this document lists some suitable materials for pressure bearing parts, inner metallic partition walls, auxiliary devices, integral process and sensing lines, connectors and fasteners. Other materials may be used when complying with the restrictions given in Table 5.
Continued integrity of gas pressure regulators is ensured by suitable surveillance checks and maintenance. For periodic functional checks and maintenance it is common to refer to national regulations/standards where existing or users/manufacturers practices.
This document has introduced the reaction of the pressure regulators to the specified reasonable expected failures in terms of "fail close" and "fail open" pressure regulator types, but it should be considered that there are other types of failures whose consequences can bring to the same reactions (these risks are covered via redundancy as per EN 12186) and that residual hazards will be reduced by a suitable surveillance in use / maintenance.
In this document, both pressure regulators that can be classified as "safety accessories" by themselves (monitors) according to European legislation on pressure equipment as well as regulators that can be used to provide the necessary pressure protection through redundancy (e.g. pressure regulator with integrated safety shut-off device, pressure regulator + in-line monitor, pressure regulator + safety shut off device) are considered.
The provisions in this document are in line with the state of art at the moment of writing.
Gas-Druckregelgeräte für Eingangsdrücke bis 10 MPa (100 bar)
Dieses Dokument legt Anforderungen an Konstruktion, Funktion, Prüfung, Kennzeichnung, Bemessung und Dokumentation von Gas-Druckregelgeräten fest:
— für Eingangsdrücke bis 100 bar und Nennweiten bis DN 400;
— für einen Betriebstemperaturbereich von ‒20 °C bis +60 °C;
soweit sie mit Brenngasen der 1. und 2. Gas-Familie nach EN 437:2018 [1] in den Druckregelanlagen nach EN 12186 oder EN 12279 in Gastransport- und Gasverteilnetzen sowie in gewerblichen und industriellen Anlagen betrieben werden.
Der Begriff „Gas-Druckregelgeräte“ wird im Weiteren, außer in Überschriften, mit „Regelgeräte“ abgekürzt.
Für Standardregelgeräte für den Einsatz in Druckregelanlagen nach EN 12186 oder EN 12279 listet Anhang ZA alle anwendbaren, grundlegenden Sicherheitsanforderungen der europäischen Rechts-vorschriften mit Ausnahme der Beständigkeit gegen äußere und innere Korrosion bei Anwendung in korrosiven Umgebungen auf.
Dieses Dokument behandelt folgende Temperaturklassen/Ausführungen von Regelgeräten:
— Temperaturklasse 1: Betriebstemperaturbereich von ‒10 °C bis 60 °C;
— Temperaturklasse 2: Betriebstemperaturbereich von ‒20 °C bis 60 °C;
— Ausführung IS (einheitlicher Festigkeitsbereich);
— Ausführung DS (verschiedene Festigkeitsbereiche).
Dieses Dokument gilt für Regelgeräte, deren Hilfsenergie für die Regelung dem Betriebsgas ohne Unterstützung durch externe Energiequellen entnommen wird.
Das Regelgerät darf mit einem zweiten Regelgerät ausgerüstet sein, das als Monitor eingesetzt wird und den Anforderungen in diesem Dokument entspricht.
Das Regelgerät darf mit einer Sicherheitsabsperreinrichtung (SAE) ausgerüstet sein, die den Anforderungen nach EN 14382 entspricht.
Das Regelgerät darf mit einer integrierten Abblaseeinrichtung für Leckgas entsprechend den Anforderungen nach Anhang E und/oder mit einem Atmungsventil entsprechend den Anforderungen nach Anhang I ausgerüstet sein.
Dieses Dokument gilt nicht für:
— Regelgeräte vor/an/in Haushalts-Gasgeräten, die hinter Hausgaszählern installiert sind;
— Regelgeräte, die für den Einbau in Druckregelsystemen in Anschlussleitungen ) mit einem Volumen-strom unter Normbedingungen ≤ 200 m3/h und einem Eingangsdruck ≤ 5 bar vorgesehen sind;
— Regelgeräte, für die ein einschlägiges Dokument vorliegt (z. B. EN 88-1 und EN 88-2 usw.);
— Regelarmaturen für die industrielle Prozessregelung nach EN 1349.
Régulateurs de pression de gaz pour des pressions amont jusqu’à 100 bar
Cette Norme Européenne spécifie les exigences relatives à la construction, au fonctionnement, aux essais, au marquage, au dimensionnement et à la documentation des régulateurs de pression de gaz :
- pour des pressions amont jusqu’à 100 bar et des diamètres nominaux jusqu’au DN 400 ;
- pour une plage de température de service allant de - 20 °C à + 60 °C ,
qui sont exploités avec des gaz combustibles de la première et de la deuxième famille, telles que définies dans l'EN 437:2003+A1:2009, utilisés dans les postes de détente-régulation de pression conformément à l'EN 12186 ou à l'EN 12279, dans les réseaux de transport et de distribution ainsi que dans les installations commerciales et industrielles.
Dans la suite du présent document, à l'exception des titres, les « régulateurs de pression de gaz » sont désignés par le terme « régulateurs ».
Pour les régulateurs standards utilisés avec des postes de détente-régulation de pression conformes à l'EN 12186 ou à l'EN 12279, l'Annexe ZA énumère toutes les exigences essentielles de sécurité applicables de la réglementation européenne sur les équipements sous pression, à l'exception de la corrosion interne et externe pour des utilisations dans des environnements corrosifs.
Le présent document traite des classes de température/types de régulateurs suivants :
- classe de température 1 : plage de température de service de - 10 °C à 60 °C ;
- classe de température 2 : plage de température de service de - 20 °C à 60 °C ;
- type IS : (type à résistance intégrale) ;
- type DS : (type à résistance différentielle).
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 un deuxième régulateur, utilisé comme moniteur, conforme aux exigences du présent document.
Le régulateur peut comporter un clapet de sécurité (CS) conforme aux exigences de l'EN 14382.
Le régulateur peut comporter une soupape à débit partiel conforme aux exigences de l'Annexe E et/ou un limiteur d'évent conforme aux exigences de l'Annexe I.
Les régulateurs conformes aux exigences du présent document peuvent être déclarés « conformes à l'EN 334 » et porter le marquage « EN 334 ».
Le présent document ne s’applique pas :
- aux régulateurs situés en amont, sur ou dans des appareils d'utilisation domestique placés en aval du compteur de gaz domestique ;
- aux régulateurs conçus pour être intégrés aux systèmes de régulation de pression utilisés dans les branchements ) avec débit volumétrique ≤ 200 m3/h dans les conditions normales et à une pression amont ≤ 5 bar ;
- aux régulateurs pour lesquels il existe un document spécifique (par exemple EN 88-1 et EN 88-2, etc.) ;
- aux vannes de régulation des processus industriels conformément à l'EN 1349.
L’Annexe G normative du présent document dresse la liste de certains matériaux appropriés pour les parties sous pression, les parois métalliques intérieures de séparation, les accessoires auxiliaires, les lignes de procédés et de détection intégrées, les raccords et les dispositifs de fixation. D’autres matériaux peuvent être utilisés lorsqu’ils sont conformes aux restrictions données dans le Tableau 5.
L'intégrité permanente des régulateurs de pression de gaz est assurée par des contrôles de surveillance et une maintenance appropriés. Pour les contrôles de fonctionnement et la maintenance périodiques, il est courant de se référer aux réglementations/normes nationales existantes ou aux pratiques recommandées par les utilisateurs/fabricants.
(...)
Regulatorji tlaka plina za vstopne tlake do 10 MPa (100 bar)
Ta dokument določa konstrukcijske, funkcionalne in preskusne zahteve ter zahteve za označevanje, določanje velikosti in dokumentacijo regulatorjev tlaka plina, ki se uporabljajo v plinskih postajah za regulacijo tlaka v skladu s standardom EN 12186 ali EN 12279: – za vstopne tlake do 100 barov in nazivne premere do DN 400; – za delovno temperaturno območje od –20 °C do +60 °C, ki delujejo z gorivnimi plini 1. in 2. družine v skladu s standardom EN 437 v prenosnih in distribucijskih omrežjih ter tudi v komercialnih in industrijskih napravah.
General Information
Relations
Frequently Asked Questions
EN 334:2019 is a standard published by the European Committee for Standardization (CEN). Its full title is "Gas pressure regulators for inlet pressure up to 10 MPa (100 bar)". This standard covers: This European Standard specifies constructional, functional, testing, marking, sizing and documentation requirements of gas pressure regulators: - 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 as defined in EN 437:2003+A1:2009, used in the pressure regulating stations in accordance with EN 12186 or EN 12279, in transmission and distribution networks and also in commercial and industrial installations. "Gas pressure regulators" hereafter will be called "regulators" except in the titles. For standard regulators when used in pressure regulating stations complying with EN 12186 or EN 12279, the Annex ZA lists all applicable essential safety requirements of the European legislation on pressure equipment except external and internal corrosion resistance for applications in corrosive environment. This document considers the following temperature classes/types of regulators: - temperature class 1: operating temperature range from −10 °C to 60 °C; - temperature class 2: operating temperature range from −20 °C to 60 °C; - type IS: (integral strength type); - type DS: (differential strength type). 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 second regulator, used as monitor, complying with the requirements in this document. The regulator may incorporate a safety shut off device (SSD) complying with the requirements of EN 14382. The regulator may incorporate a creep (venting) relief device, complying with the requirements in Annex E and/or a vent limiter, complying with the requirements in Annex I. This document does not apply to: - regulators upstream from/on/in domestic gas-consuming appliances which are installed downstream of domestic gas meters; - regulators designed to be incorporated into pressure control systems used in service lines ) with volumetric flow rate ≤ 200 m3/h at normal conditions and inlet pressure ≤ 5 bar; - regulators for which a specific document exists (e.g. EN 88-1 and EN 88-2, etc.); - industrial process control valves in accordance with EN 1349. The normative Annex G of this document lists some suitable materials for pressure bearing parts, inner metallic partition walls, auxiliary devices, integral process and sensing lines, connectors and fasteners. Other materials may be used when complying with the restrictions given in Table 5. Continued integrity of gas pressure regulators is ensured by suitable surveillance checks and maintenance. For periodic functional checks and maintenance it is common to refer to national regulations/standards where existing or users/manufacturers practices. This document has introduced the reaction of the pressure regulators to the specified reasonable expected failures in terms of "fail close" and "fail open" pressure regulator types, but it should be considered that there are other types of failures whose consequences can bring to the same reactions (these risks are covered via redundancy as per EN 12186) and that residual hazards will be reduced by a suitable surveillance in use / maintenance. In this document, both pressure regulators that can be classified as "safety accessories" by themselves (monitors) according to European legislation on pressure equipment as well as regulators that can be used to provide the necessary pressure protection through redundancy (e.g. pressure regulator with integrated safety shut-off device, pressure regulator + in-line monitor, pressure regulator + safety shut off device) are considered. The provisions in this document are in line with the state of art at the moment of writing.
This European Standard specifies constructional, functional, testing, marking, sizing and documentation requirements of gas pressure regulators: - 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 as defined in EN 437:2003+A1:2009, used in the pressure regulating stations in accordance with EN 12186 or EN 12279, in transmission and distribution networks and also in commercial and industrial installations. "Gas pressure regulators" hereafter will be called "regulators" except in the titles. For standard regulators when used in pressure regulating stations complying with EN 12186 or EN 12279, the Annex ZA lists all applicable essential safety requirements of the European legislation on pressure equipment except external and internal corrosion resistance for applications in corrosive environment. This document considers the following temperature classes/types of regulators: - temperature class 1: operating temperature range from −10 °C to 60 °C; - temperature class 2: operating temperature range from −20 °C to 60 °C; - type IS: (integral strength type); - type DS: (differential strength type). 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 second regulator, used as monitor, complying with the requirements in this document. The regulator may incorporate a safety shut off device (SSD) complying with the requirements of EN 14382. The regulator may incorporate a creep (venting) relief device, complying with the requirements in Annex E and/or a vent limiter, complying with the requirements in Annex I. This document does not apply to: - regulators upstream from/on/in domestic gas-consuming appliances which are installed downstream of domestic gas meters; - regulators designed to be incorporated into pressure control systems used in service lines ) with volumetric flow rate ≤ 200 m3/h at normal conditions and inlet pressure ≤ 5 bar; - regulators for which a specific document exists (e.g. EN 88-1 and EN 88-2, etc.); - industrial process control valves in accordance with EN 1349. The normative Annex G of this document lists some suitable materials for pressure bearing parts, inner metallic partition walls, auxiliary devices, integral process and sensing lines, connectors and fasteners. Other materials may be used when complying with the restrictions given in Table 5. Continued integrity of gas pressure regulators is ensured by suitable surveillance checks and maintenance. For periodic functional checks and maintenance it is common to refer to national regulations/standards where existing or users/manufacturers practices. This document has introduced the reaction of the pressure regulators to the specified reasonable expected failures in terms of "fail close" and "fail open" pressure regulator types, but it should be considered that there are other types of failures whose consequences can bring to the same reactions (these risks are covered via redundancy as per EN 12186) and that residual hazards will be reduced by a suitable surveillance in use / maintenance. In this document, both pressure regulators that can be classified as "safety accessories" by themselves (monitors) according to European legislation on pressure equipment as well as regulators that can be used to provide the necessary pressure protection through redundancy (e.g. pressure regulator with integrated safety shut-off device, pressure regulator + in-line monitor, pressure regulator + safety shut off device) are considered. The provisions in this document are in line with the state of art at the moment of writing.
EN 334:2019 is classified under the following ICS (International Classification for Standards) categories: 23.060.40 - Pressure regulators. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 334:2019 has the following relationships with other standards: It is inter standard links to EN 334:2005+A1:2009, EN 334:2019+A1:2024, EN 334:2019/FprA1. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 334:2019 is associated with the following European legislation: EU Directives/Regulations: 2014/68/EU, 96/86/EC, 97/23/EC; Standardization Mandates: M/071. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
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Standards Content (Sample)
SLOVENSKI STANDARD
01-november-2019
Nadomešča:
SIST EN 334:2005+A1:2009
Regulatorji tlaka plina za vstopne tlake do 10 MPa (100 bar)
Gas pressure regulators for inlet pressure up to 10 MPa (100 bar)
Gas-Druckregelgeräte für Eingangsdrücke bis 10 MPa (100 bar)
Régulateurs de pression de gaz pour des pressions amont jusqu’à 10 MPa (100 bar)
Ta slovenski standard je istoveten z: EN 334:2019
ICS:
23.060.40 Tlačni regulatorji Pressure regulators
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 334
EUROPEAN STANDARD
NORME EUROPÉENNE
August 2019
EUROPÄISCHE NORM
ICS 23.060.40 Supersedes EN 334:2005+A1:2009
English Version
Gas pressure regulators for inlet pressure up to 10 MPa
(100 bar)
Régulateurs de pression de gaz pour des pressions Gas-Druckregelgeräte für Eingangsdrücke bis 10 MPa
amont jusqu'à 10 MPa (100 bar) (100 bar)
This European Standard was approved by CEN on 23 April 2019.
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, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 334:2019 E
worldwide for CEN national Members.
Contents Page
European foreword . 7
1 Scope . 9
2 Normative references . 10
3 Terms and definitions . 13
3.1 General terms and definitions of types of gas pressure regulators . 13
3.2 Terms and definitions of components of gas pressure regulators. 16
3.3 Terms, symbols and definitions related to functional performance . 18
3.3.1 Terms, symbols and definitions related to pressure . 18
3.3.2 Terms, symbols and definitions related to flow . 19
3.3.3 Sound emission . 20
3.3.4 Variables in the controlling process . 21
3.3.5 Terms and definitions related to possible values of all variables . 21
3.3.6 Terms, symbols and definitions related to the controlled process . 21
3.3.7 Terms, symbols and definitions of functional performance . 22
3.3.8 Feature related to accuracy . 23
3.3.9 Terms, symbols and definitions related to lock-up behaviour . 25
3.4 Terms, symbols and definitions related to design and tests . 26
3.5 Summary of symbols, terms, subclauses and units. 29
4 Construction requirements . 31
4.1 Basic requirements . 31
4.1.1 General . 31
4.1.2 Gas pressure regulators with associated safety devices . 31
4.1.3 End connections . 33
4.1.4 Flange ratings . 34
4.1.5 Nominal sizes and face-to-face dimensions . 34
4.1.6 Sealing of the adjusting device . 37
4.1.7 Springs . 37
4.1.8 Parts transmitting actuating forces . 37
4.1.9 Replaceable parts that may be affected by erosion or abrasion . 37
4.2 Materials . 38
4.2.1 Requirements for metallic materials . 38
4.2.2 Requirements for elastomeric materials (vulcanized rubber materials) . 43
4.2.3 Requirements for non-metallic materials different from those in 4.2.2 . 44
4.3 Strength of housings and other parts. 44
4.3.1 Body . 44
4.3.2 Flanges . 44
4.3.3 Other pressure bearing parts . 44
4.3.4 Integral strength pressure regulators . 46
4.3.5 Differential strength pressure regulators . 46
4.3.6 Inner metallic partition walls . 46
4.3.7 Minimum values of safety factor for pressure bearing parts . 46
4.3.8 Welded joint coefficient . 46
4.3.9 Design requirements for strength of elastomeric parts . 47
5 Functional and characteristic requirements . 47
5.1 General . 47
5.1.1 Mounting position . 47
5.2 Shell strength, external tightness and internal sealing . 47
5.2.1 Shell strength . 47
5.2.2 External tightness . 48
5.2.3 Internal sealing . 48
5.3 Control classifications . 48
5.3.1 Accuracy under stable conditions . 48
5.3.2 Lock-up behaviour . 48
5.3.3 Stable conditions. 49
5.4 Final visual inspection . 49
5.4.1 Requirements for final visual inspection after type tests . 49
5.4.2 Requirements for final visual inspection after routine tests and production
surveillance . 49
5.5 Fail close conditions . 50
5.6 Fail open conditions . 50
5.7 Closing force for monitor at full open position . 50
5.8 Antistatic characteristics . 51
6 Gas pressure regulator sizing . 51
6.1 Flow behaviour . 51
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 . 52
6.2.1 Normal calculations . 52
6.2.2 Practical calculations . 52
6.2.3 Simplified calculations . 52
6.3 Calculation of the maximum accuracy flow rate . 53
6.4 Inherent flow characteristics . 53
6.5 Calculation of volumetric flow rates for partially open gas pressure regulators . 53
6.6 Flow coefficient . 53
7 Testing . 54
7.1 General . 54
7.2 Tests . 54
7.3 Type test . 55
7.4 Selection of test samples . 55
7.5 Routine tests . 56
7.6 Production surveillance . 56
7.7 Test and verification methods . 56
7.7.1 Dimensional check and visual inspection . 56
7.7.2 Materials check . 56
7.7.3 Verification of the strength of pressure bearing parts, inner metallic partition walls
and other parts . 56
7.7.4 Shell and inner metallic partition walls strength test . 58
7.7.5 Alternative shell and inner metallic partition walls strength test . 59
7.7.6 Verification of closing force for monitor in fully open position under normal
operating conditions . 59
7.7.7 External tightness test . 59
7.7.8 Test method and acceptance criteria to verify the antistatic characteristics . 61
7.7.9 Functional tests . 61
7.7.10 Final visual inspections . 74
8 Field surveillance . 74
9 Documentation . 74
9.1 Documentation related to type test . 74
9.1.1 Documentation required prior to type test. 74
9.1.2 Test report . 75
9.2 Documentation related to the routine tests . 75
9.3 Documentation related to production surveillance in accordance with 7.6 . 75
9.3.1 Documentation for production surveillance . 75
9.3.2 Production surveillance report . 75
9.4 Operating instructions . 75
10 Marking . 76
10.1 General requirements . 76
10.2 Basic requirements . 76
10.3 Other additional requirements . 77
10.4 Marking of integrated safety devices . 77
10.5 Markings for the various connections . 77
11 Packaging of finished product . 78
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 . 79
A.1 General . 79
A.2 Test methods . 79
A.2.1 Direct acting gas pressure regulator . 79
A.2.2 Pilot controlled gas pressure regulators . 80
A.3 Determination of flow coefficients for larger capacity regulators . 81
Annex B (informative) Inspection certificate . 87
Annex C (informative) Acceptance test . 89
)
Annex D (informative) Compliance evaluation . 90
D.1 General . 90
D.2 Introduction . 90
D.3 Procedure. 90
D.4 Manufacturer’s compliance evaluation . 90
D.5 Issue of the certificate of compliance . 91
Annex E (normative) Creep (venting) relief device . 92
E.1 General . 92
E.2 Terms and definitions . 92
E.3 Requirements . 92
E.3.1 Construction . 92
E.3.2 Functional requirements. 92
E.4 Testing . 92
E.5 Type test . 93
E.6 Routine tests . 93
E.7 Documentation . 93
E.8 Marking . 93
Annex F (informative) Order specification . 94
F.1 General . 94
F.2 Minimum specifications . 94
F.2.1 Details of construction . 94
F.2.2 Dimensions . 94
F.2.3 Performance . 94
F.3 Optional specifications . 95
Annex G (informative) Materials . 97
G.1 Steel materials for pressure bearing parts and inner metallic partition walls . 97
G.2 Metallic materials different from steel materials for pressure bearing parts and
inner metallic partition walls. 114
G.3 Materials for auxiliary devices, integral process and sensing lines, threaded sealing
plug, connectors and fasteners . 119
G.4 Update to year 2017 on Metallic Material Standards used in the previous editions of
this standard . 124
Annex H (informative) Dynamic force calculation method . 126
H.1 General . 126
H.2 Test method for the determination of the dynamic factor Cr . 126
H.2.1 General . 126
H.2.2 Test method for the determination of the dynamic factor Cr for a series of monitor . 127
Annex I (normative) Vent limiter . 129
I.1 General . 129
I.2 Scope . 129
I.3 Terms, symbols and definitions . 129
I.4 Requirements . 130
I.4.1 General requirements . 130
I.4.2 Materials . 130
I.4.3 Strength . 130
I.4.4 Functional requirements . 130
I.5 Testing and acceptance criteria . 131
I.5.1 General . 131
I.5.2 Type test method . 131
I.6 Documentation . 132
I.7 Specific marking on vent limiter . 132
Annex J (normative) Elastomeric material . 133
Annex K (informative) Sound emission . 135
K.1 Sound emission requirements . 135
K.2 Methods for measuring the sound pressure level . 136
Annex L (informative) Environmental Provisions . 137
Annex M (informative) Glossary . 141
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2014/68/EU aimed to be covered . 145
Bibliography . 147
European foreword
This document (EN 334:2019) 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 February 2020, and conflicting national standards
shall be withdrawn at the latest by February 2020.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 334:2005+A1:2009.
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.
In comparison with the previous edition, the following technical modifications have been made:
— normative references have been updated;
— terms and definitions have been added;
— flange ratings as per the available European Standards both with PN and class designations have
been included: PN 20 and PN 50 flanges, as per ISO 7005-2, concern spheroidal graphite cast iron
only, because at the time of writing, there was no EN standard available for class designation;
— minimum requirements for elastomeric materials following the approach already have been
adopted for metallic materials;
— “fail open” and “fail close” characteristics have been improved as per the CEN rules i.e.
implementing for each characteristics, where originally missed, the relevant requirement/test
method/ acceptance criteria;
— provisions for surveillance in use have been included, as already done for SSDs in EN 14382;
— closing force for stand-by monitor when classified as safety accessory to PED as already done for
SSD when classified as safety accessory to PED;
— antistatic characteristics;
— statistical strength test on the basis of PED provisions;
— definition of Cg flow coefficient and an improvement of KG flow coefficient by adding the
definition/test method/notice of its limits;
— improvement of the functional performance classification;
— Annex G – Materials has been updated;
— requirements/test procedure and acceptance criteria for non-metallic materials have been
updated;
— vent limiter as possible fixture to be assembled in the pressure regulators;
— integration of environmental requirements;
— alignment of Normative references (Clause 2), Annex G, Annex ZA and its relevant clauses to CEN
rules;
— the standard has been editorially revised.
This document can be used as a guideline for gas pressure regulators outside the ranges specified in this
standard. This edition has introduced the application of statistical strength testing for series produced
pressure and safety accessories on the basis of EU Directive 2014/68/EU, Annex I, Article 3.2.2 and
Guideline H-14. Gas pressure regulators dealt with in this document are considered as standard
pressure equipment in accordance with Clause 2 a) of Art. 1 of Pressure Equipment Directive
2014/68/EU (PED).
Gas pressure regulators according to this European Standard do not have their own source of ignition.
However, the manufacturer is responsible to identify any potential ignition sources of his product
1)
which could be effective during the intended use .
According to the CEN-CENELEC Internal Regulations, the national standards organisations 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, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
1) Therefore gas pressure regulators are usually not within the scope of ATEX European legislation on equipment
and protective systems intended for use in potentially explosive atmospheres. Any additional component (e.g.
proximity switch, travel transducer etc.) should be independently considered in the framework of assemblies as
per ATEX 2014/34/EU Guidelines – 2nd Edition - December2017 clauses § 44 “Combined equipment
(assemblies)”, § 46 “Components” and § 94 “Written attestation of conformity for components”.
1 Scope
This document specifies constructional, functional, testing, marking, sizing and documentation
requirements of gas pressure regulators:
— 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 as defined in EN 437:2018 [1], used in the
pressure control stations in accordance with EN 12186 or EN 12279, in transmission and distribution
networks and also in commercial and industrial installations.
“Gas pressure regulators” hereafter will be called “regulators” except in the titles.
For standard regulators when used in pressure control stations complying with EN 12186 or EN 12279,
the Annex ZA lists all applicable essential safety requirements of the European legislation on pressure
equipment except external and internal corrosion resistance for applications in corrosive environment.
This document considers the following temperature classes/types of regulators:
— temperature class 1: operating temperature range from −10 °C to 60 °C;
— temperature class 2: operating temperature range from −20 °C to 60 °C;
— type IS: (integral strength type);
— type DS: (differential strength type).
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 second regulator, used as monitor, complying with the requirements
in this document.
The regulator may incorporate a safety shut off device (SSD) complying with the requirements of
EN 14382.
The regulator may incorporate a creep (venting) relief device, complying with the requirements in
Annex E and/or a vent limiter, complying with the requirements in Annex I.
This document does not apply to:
— regulators upstream from/on/in domestic gas-consuming appliances which are installed
downstream of domestic gas meters;
2)
— regulators designed to be incorporated into pressure control systems used in service lines with
volumetric flow rate ≤ 200 m /h at normal conditions and inlet pressure ≤ 5 bar;
— regulators for which a specific document exists (e.g. EN 88-1 and EN 88-2, etc.);
— industrial process control valves in accordance with EN 1349.
2) The services lines are those defined in EN 12279.
The informative Annex G of this document lists some suitable materials for pressure bearing parts,
inner metallic partition walls, auxiliary devices, integral process and sensing lines, connectors and
fasteners. Other materials may be used when complying with the restrictions given in Table 5.
Continued integrity of gas pressure regulators is ensured by suitable surveillance checks and
maintenance. For periodic functional checks and maintenance it is common to refer to national
regulations/standards where existing or users/manufacturers practices.
This document has introduced the reaction of the pressure regulators to the specified reasonable
expected failures in terms of “fail close” and “fail open” pressure regulator types, but it should be
considered that there are other types of failures whose consequences can bring to the same reactions
(these risks are covered via redundancy as per EN 12186) and that residual hazards will be reduced by
a suitable surveillance in use / maintenance.
In this document, both pressure regulators that can be classified as “safety accessories” by themselves
(monitors) according to European legislation on pressure equipment as well as regulators that can be
used to provide the necessary pressure protection through redundancy (e.g. pressure regulator with
integrated safety shut-off device, pressure regulator + in-line monitor, pressure regulator + safety shut
off device) are considered.
The provisions in this document are in line with the state of art at the moment of writing.
This document does not intend to limit the improvement of actual provisions (materials, requirements,
test methods, acceptance criteria, etc.) or the developing of new provisions for gas pressure regulators
where they are suitable to ensure an equivalent level of reliability.
Some clauses of this standard should be re-considered at the time when characteristics for non-
conventional gases will be available.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 549:1994, Rubber materials for seals and diaphragms for gas appliances and gas equipment
EN 1092-1:2018, Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN
designated - Part 1: Steel flanges
EN 1092-2:1997, Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN
designated - Part 2: Cast iron flanges
EN 1092-3:2003, Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN
designated - Part 3: Copper alloy flanges
EN 1092-4:2002, Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN
designated - Part 4: Aluminium alloy flanges
EN 1349:2009, Industrial process control valves
EN 1759-1:2004, Flanges and their joint - Circular flanges for pipes, valves, fittings and accessories, Class
designated - Part 1: Steel flanges, NPS 1/2 to 24
EN 1759-3:2003, Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, Class
designated - Part 3: Copper alloy flanges
EN 1759-4:2003, Flanges and their joint - Circular flanges for pipes, valves, fittings and accessories, class
designated - Part 4: Aluminium alloy flanges
EN 10204:2004, Metallic products - Types of inspection documents
EN 10226-1:2004, Pipe threads where pressure tight joints are made on the threads - Part 1: Taper
external threads and parallel internal threads - Dimensions, tolerances and designation
EN 10226-2:2005, Pipe threads where pressure tight joints are made on the threads - Part 2: Taper
external threads and taper internal threads - Dimensions, tolerances and designation
EN 12186:2014, Gas infrastructure - Gas pressure regulating stations for transmission and distribution -
Functional requirements
EN 12279:2000/A1:2005, Gas supply systems - Gas pressure regulating installations on service lines -
Functional requirements
EN 12516-1:2014+A1:2018, Industrial valves - Shell design strength - Part 1: Tabulation method for steel
valve shells
EN 12516-2:2014, Industrial valves - Shell design strength - Part 2: Calculation method for steel valve
shells
EN 12516-4:2014+A1:2018, Industrial valves - Shell design strength - Part 4: Calculation method for valve
shells manufactured in metallic materials other than steel
EN 13445-4:2014/A1:2016, Unfired pressure vessels - Part 4: Fabrication
EN 13906-1:2013, Cylindrical helical springs made from round wire and bar - Calculation and design -
Part 1 : Compression springs
EN 13906-2:2013, Cylindrical helical springs made from round wire and bar - Calculation and design -
Part 2: Extension springs
EN 13906-3:2014, Cylindrical helical springs made from round wire and bar - Calculation and design -
Part 3: Torsion springs
EN 14382:2019, Safety devices for gas pressure regulating stations and installations – Gas safety shut-off
devices for inlet pressures up to 10 MPa (100 bar)
EN 60534-2-1:2011, Industrial-process control valves - Part 2-1: Flow capacity - Sizing equations for fluid
flow under installed conditions
EN 60534-2-3:2016, Industrial-process control valves - Part 2-3: Flow capacity - Test procedures
(IEC 60534-2-3:2016)
EN 60534-3-1:2000, Industrial-process control valves - Part 3-1: Dimensions - Face-to-face dimensions for
flanged, two-way, globe-type, straight pattern and centre-to-face dimensions for flanged, two-way, globe-
type, angle pattern control valves
EN ISO 148-1:2016, Metallic materials - Charpy pendulum impact test - Part 1: Test method (ISO 148-
1:2016)
EN ISO 175:2010, Plastics - Methods of test for the determination of the effects of immersion in liquid
chemicals (ISO 175:2010)
EN ISO 9606-1:2017, Qualification testing of welders - Fusion welding - Part 1: Steels (ISO 9606-1:2012
including Cor 1:2012 and Cor 2:2013)
EN ISO 9606-2:2004, Qualification test of welders - Fusion welding - Part 2: Aluminium and aluminium
alloys (ISO 9606-2:2004)
EN ISO 9606-3:1999, Approval testing of welders - Fusion welding - Part 3: Copper and copper alloys (ISO
9606-3:1999)
EN ISO 9606-4:1999, Approval testing of welders - Fusion welding - Part 4: Nickel and nickel alloys (ISO
9606-4:1999)
EN ISO 9712:2012, Non-destructive testing - Qualification and certification of NDT personnel (ISO
9712:2012)
EN ISO 12156-1:2018, Diesel fuel - Assessment of lubricity using the high-frequency reciprocating rig
(HFRR) - Part 1: Test method (ISO 12156-1:2018)
EN ISO 14732:2013, Welding personnel - Qualification testing of welding operators and weld setters for
mechanized and automatic welding of metallic materials (ISO 14732:2013)
EN ISO 15607:2003, Specification and qualification of welding procedures for metallic materials - General
rules (ISO 15607:2003)
EN ISO 15609-1:2004, Specification and qualification of welding procedures for metallic materials -
Welding procedure specification - Part 1: Arc welding (ISO 15609-1:2004)
EN ISO 15610:2003, Specification and qualification of welding procedures for metallic materials -
Qualification based on tested welding consumables (ISO 15610:2003)
EN ISO 15611:2
...
記事タイトル: EN 334:2019 - 最大10 MPa（100バー）までの入口圧力用ガス圧力調整器 記事内容: このヨーロッパ標準は、ガス圧力調整器の構造的、機能的、試験的、マーキング的、サイジング的、文書化的要件を規定しています。 - DN400までのノミナル径と100バーまでの入口圧に対応する - -20°Cから+60°Cの動作温度範囲で動作する、 これらの調整器は、EN 437:2003+A1:2009で定義された1次および2次のファミリーの燃料ガスを使用し、EN 12186またはEN 12279に準拠する圧力調整ステーション、送電・配電ネットワーク、商業および産業施設で使用されます。 本書では、以下の温度クラス／タイプの調整器を考慮しています。 - 温度クラス1：-10°Cから60°Cの動作温度範囲 - 温度クラス2：-20°Cから60°Cの動作温度範囲 - ISタイプ：積分強度タイプ - DSタイプ：差動強度タイプ 本文書は、外部電源を介さずにパイプラインガスを制御エネルギー源とする調整器に適用されます。調整器には、本文書の要件を満たす監視器として使用される第2の調整器を内蔵することができます。 調整器には、EN 14382の要件を満たすセーフティシャットオフデバイス（SSD）を内蔵することもできます。また、付録Eの要件を満たすクリープ（排気）リリーフデバイスや付録Iの要件を満たすベントリミッターも内蔵することができます。 本文書は以下に該当する調整器には適用されません。 - ドメスティックガス消費機器の上流／上／内の調整器（ドメスティックガスメーターの下流に設置される） - ノーマル条件での体積流量が≤200 m3/hかつ入口圧力が≤5バールのサービスラインに使用される圧力制御システムに組み込まれる調整器 - 特定の文書が存在する調整器（例：EN 88-1およびEN 88-2など） - EN 1349に準拠した産業プロセス制御弁 本文書の規定には、圧力を保持する部品、内部金属仕切り壁、補助装置、積分プロセスおよびセンシングライン、コネクタおよびファスナーに適しているいくつかの適合材料を示す付録Gがあります。その他の材料は、表5で与えられた制限に準拠していれば使用することができます。 ガス圧力調整器の持続的な完全性は、適切な監視点検とメンテナンスによって確保されます。定期的な機能点検とメンテナンスには、既存の国家規制/標準またはユーザー/製造業者の慣行を参照することが一般的です。 本文書では、指定された合理的な予測故障に対する圧力調整器の反応を取り上げており、「fail close」と「fail open」の圧力調整器タイプについて説明しています。ただし、同様の反応をもたらす他の故障の種類が存在すること（これらのリスクはEN 12186を介した冗長性によってカバーされる）、および適切な使用/メンテナンスによって残留リスクが低減されることを考慮すべきです。 本文書では、EUの圧力設備において「安全アクセサリー」として単独で分類できる圧力調整器だけでなく、冗長性を介して必要な圧力保護を提供できる調整器（例：圧力調整器と統合された安全シャットオフデバイス、圧力調整器+インラインモニター、圧力調整器+安全シャットオフデバイスなど）も考慮されています。 この文書の規定は、執筆時点での業界の最新技術に沿っています。
EN 334:2019 is a European standard that sets requirements for gas pressure regulators with inlet pressures up to 100 bar. It includes specifications for construction, testing, marking, sizing, and documentation. The standard applies to regulators operating with fuel gases in various settings, including pressure regulating stations, transmission and distribution networks, and commercial and industrial installations. The document defines temperature classes and types of regulators and excludes certain types of regulators from its scope. It also provides a list of suitable materials for pressure bearing parts and other components. The document emphasizes the need for regular surveillance checks and maintenance to ensure the ongoing integrity of gas pressure regulators. It discusses the reactions of pressure regulators to specified failures and highlights the importance of redundancy and surveillance in reducing residual hazards. Furthermore, the standard covers both pressure regulators that can be considered "safety accessories" on their own and those that provide pressure protection through redundancy. The provisions of the document align with the current state of the industry at the time of writing.
EN 334:2019은 유럽 표준으로서, 100 바까지의 입구 압력을 갖는 가스 압력 조절기에 대한 요구 사항을 설정합니다. 이 표준은 건설, 기능, 시험, 표시, 사이즈 조정 및 문서 작성을 위한 명세를 포함하고 있습니다. 이 표준은 EN 437:2003+A1:2009에서 정의된 1급 및 2급 연료 가스를 사용하는 가스 압력 조절 기능을 가진 압력 조절 장치에 적용됩니다. 이는 EN 12186 또는 EN 12279에 따라 압력 조절 스테이션에서 사용되는 것은 물론, 전송 및 배관망, 상업 및 산업 설치에서도 사용됩니다. 이 문서는 온도 클래스 및 유형의 조절기를 고려합니다. 또한 특정 유형의 조절기를 이 문서의 적용 범위에서 제외합니다. 표준 조절기를 사용할 때는 부식 환경에서의 응용에 대한 외부 및 내부 부식 저항을 제외한 모든 해당 필수 안전 요구 사항을 포함하는 EU 인증에 대해서는 부록 ZA가 모든 해당 핵심 안전 요구 사항을 나열합니다. 이 문서는 파이프라인 가스를 압력 제어 에너지 원천으로 사용하는 조절기에 적용됩니다. 조절기는 이 문서의 요구 사항을 준수하는 모니터로 사용되는 두 번째 조절기를 내장할 수 있습니다. 또한, 이 조절기는 EN 14382의 요구 사항을 준수하는 안전 차단 장치(SSD) 또는 부록 E의 요구 사항을 준수하는 크리프(배출) 안전 장치, 부록 I의 요구 사항을 준수하는 배기 제한기를 내장할 수 있습니다. 이 문서는 다음에 해당하는 조절기에는 적용되지 않습니다: - 가정용 가스 소비기기의 상승/하선 /내부 조절기 (가정용 가스계 다음에 설치된) - 일반적인 조건에서의 체적 흐름율 ≤ 200 m3/h 및 입구 압력 ≤ 5 bar인 서비스 라인에서 사용되는 압력 제어 시스템에 포함될 수 있는 조절기 - 특정 문서가 존재하는 조절기 (예: EN 88-1 및 EN 88-2 등) - EN 1349에 따른 산업 공정 제어 밸브 이 문서는 압력을 지탱하는 부품, 내부 금속 분할벽, 보조 장치, 적분 프로세스 및 센싱 라인, 커넥터 및 조임 장치에 적합한 재료 목록을 포함하고 있습니다. 표 5에서 명시한 제한 사항을 준수한다면 다른 재료를 사용할 수도 있습니다. 가스 압력 조절기의 지속적인 무결성은 적합한 감시 점검 및 유지 관리를 통해 보장됩니다. 주기적인 기능 확인 및 유지 보수를 위해서는 국가 규정/표준을 참조하는 것이 보편적입니다. 이 문서는 지정된 합리적으로 예상되는 고장에 대한 압력 조절기의 반응을 제시하며, 실패하는 종류에 따라 "fail close" 및 "fail open" 압력 조절기 유형을 고려합니다. 하지만 이러한 반응과 관련된 다른 실패 유형이 있을 수 있으며(이러한 위험은 EN 12186을 통해 중복성을 통해 다루어짐), 적절한 사용/유지 관리를 통해 잔류 위험을 줄일 수 있습니다. 이 문서에서는 유럽 압력 장비에 따라 "안전 액세서리"로 분류 될 수 있는 압력 조절기뿐만 아니라 중복성을 통한 필요한 압력 보호를 제공할 수 있는 조절기(예: 통합 안전 차단 장치와 압력 조절기, 압력 조절기 + 인라인 모니터, 압력 조절기 + 안전 차단 장치 등)도 고려됩니다. 이 문서의 규정은 작성 시점의 최신 기술 수준과 일치합니다.
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