SIST EN 334:2005+A1:2009
(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, functional, testing and marking requirements, sizing and documentation of gas pressure regulators used in the pressure regulating stations in accordance with EN 12186 or EN 12279:
- 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.
For standard regulators when used in pressure regulating stations complying with EN 12186 or EN 12279, Annex ZA lists all applicable Essential Requirements except the external corrosion resistance in case of environmental conditions where corrosion is likely to occur.
This document considers the following classes/types of regulators:
- class 1: operating temperature range from 10 °C to 60 °C;
- 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 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 incorporated into pressure-regulating devices 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, etc.);
- industrial process control valves in ac
Gas-Druckregelgeräte für Eingangsdrücke bis 100 bar
Dieses Dokument legt Anforderungen an Konstruktion, Funktion, Prüfung und Kennzeichnung, Dimensionierung und Dokumentation von Gas-Druckregelgeräten fest, die in den Druckregelanlagen nach EN 12186 und EN 12279 verwendet werden:
- für Eingangsdrücke bis 100 bar und Nennweiten bis DN 400,
- für Betriebstemperaturen von - 20 °C bis + 60 °C,
soweit sie mit Brenngasen der 1. und 2. Gas-Familie nach EN 437 in Gastransport- und Gasverteilnetzen wie auch in gewerblichen und industriellen Anlagen betrieben werden.
"Gas-Druckregelgeräte" wird im Weiteren, außer in Überschriften, mit "Regelgeräte" abgekürzt.
Für Standard-Regelgeräte, die in den Druckregelanlagen nach EN 12186 oder EN 12279 verwendet werden, schließt die Anhang ZA alle relevanten grundlegenden Anforderungen nach Anhang 1 der PED ein, mit Ausnahme der äußeren Korrosionsbeständigkeit unter Umgebungsbedingungen, in denen das Auftreten von Korrosion wahrscheinlich ist.
Dieses Dokument behandelt folgende Klassen und Ausführungen von Regelgeräten:
- Klasse 1: Betriebstemperaturbereich von - 10 °C bis 60 °C,
- Klasse 2: Betriebstemperaturbereich von - 20 °C bis 60 °C.
- Ausführung IS (einheitlicher Festigkeitsbereich);
- Ausführung DS (verschiedene Festigkeitsbereiche);
Diese Europäische Norm gilt für Regelgeräte, deren Hilfsenergie für die Regelung dem Betriebsgas ohne Unterstützung durch externe Energiequellen entnommen wird.
Ein Regelgerät darf mit einer integrierten Abblaseeinrichtung für Leckgas ausgerüstet sein, die die Anforderungen nach Anhang F erfüllt.
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 Geräten der häuslichen Gasanwendung, die hinter Haus-Gaszählern installiert sind;
(...)
Appareils de régulation de pression de gaz (régulateurs) pour des pressions amont jusqu'à 100 bar
Le présent document spécifie les exigences relatives à la construction, au fonctionnement, aux essais et au
marquage, au dimensionnement et à la documentation des appareils de régulation de pression de gaz (régulateurs)
utilisés dans les postes de détente-régulation de pression conformément à l’EN 12186 ou à l’EN 12279 :"
- pour les pressions amont jusqu'à 100 bar et les diamètres nominaux jusqu'à DN 400 ;
- pour une plage de température ambiante de – 20 °C à + 60 °C ;
qui sont exploités avec des gaz combustibles de la première et de la deuxième famille conformément à 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», à l'exception des titres.
!Pour les régulateurs standard utilisés avec les postes de détente-régulation de pression conformes à l’EN 12186
ou à l’EN 12279, l’Annexe ZA énumère toutes les exigences essentielles applicables à l'exception de la résistance
à la corrosion externe dans des conditions environnementales où la corrosion est susceptible de survenir."
!Le présent document traite des classes/types suivants 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 ;
- !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 une soupape à débit partiel conforme aux prescriptions de l'Annexe F.
Les régulateurs conformes aux prescriptions du présent document peuvent être déclarés «conformes à l'EN 334»
et porter le marquage «EN 334».
Regulatorji tlaka plina za vstopne tlake do 100 bar (vključno z dopolnilom A1)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 334:2005+A1:2009
01-junij-2009
1DGRPHãþD
SIST EN 334:2005
5HJXODWRUMLWODNDSOLQD]DYVWRSQHWODNHGREDU YNOMXþQR]GRSROQLORP$
Gas pressure regulators for inlet pressures up to 100 bar
Gas-Druckregelgeräte für Eingangsdrücke bis 100 bar
Appareils de régulation de pression de gaz (régulateurs) pour des pressions amont
jusqu'à 100 bar
Ta slovenski standard je istoveten z: EN 334:2005+A1:2009
ICS:
23.060.40 7ODþQLUHJXODWRUML Pressure regulators
SIST EN 334:2005+A1:2009 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 334:2005+A1:2009
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SIST EN 334:2005+A1:2009
EUROPEAN STANDARD
EN 334:2005+A1
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2009
ICS 23.060.40 Supersedes EN 334:2005
English Version
Gas pressure regulators for inlet pressures up to 100 bar
Appareils de régulation de pression de gaz (régulateurs) Gas-Druckregelgeräte für Eingangsdrücke bis 100 bar
pour des pressions amont jusqu'à 100 bar
This European Standard was approved by CEN on 23 December 2004 and includes Amendment 1 approved by CEN on 8 December 2008.
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 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 Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 334:2005+A1:2009: E
worldwide for CEN national Members.
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SIST EN 334:2005+A1:2009
EN 334:2005+A1:2009 (E)
Contents
page
Foreword . 5
1 Scope . 6
2 Normative references . 7
3 Terms, definitions and symbols . 9
3.1 !!!!General terms and definitions of types of gas pressure regulators"""". 9
3.2 !!!!Terms and definitions of components of gas pressure regulators"""" . 12
3.3 !!Terms, symbols and definitions of components of functional performance"" . 14
!! ""
3.3.7 !!!!Terms, symbols and definitions of functional performance"""" . 16
3.4 !!Terms, symbols and definitions related to design and tests"" . 20
!! ""
4 Construction requirements . 22
4.1 Basic requirements . 22
4.1.1 General . 22
4.1.2 !!Gas pressure regulators with associated safety devices . 23
!!
4.1.3 End connections . 25
4.1.4 Flange ratings . 25
4.1.5 Nominal sizes and face-to-face dimensions . 25
4.1.6 Sealing of the adjusting device . 29
4.1.7 !!!!Springs . 29
4.1.8 Replaceable parts that may be affected by erosion or abrasion . 29
4.2 Materials . 29
4.2.1 Requirements for metallic materials . 29
4.2.2 Requirements for elastomers (including vulcanized rubbers) . 34
4.2.3 Requirements for non metallic materials different from those in 4.2.2 . 34
4.3 Strength of housings . 35
!! . 35
!!
4.3.1 Body and its inner metallic partition walls"""" . 35
4.3.2 Flanges . 35
4.3.3 !!!!Other pressure containing parts . 35
4.3.4 Inner metallic partition walls . 37
4.3.5 Minimum values of safety factor . 37
4.3.6 Welded joint coefficient . 38
5 Functional requirements . 38
5.1 General . 38
5.1.1 Mounting position . 38
5.1.2 Sound emission . 38
5.2 Shell strength, external tightness and internal sealing . 39
5.2.1 Shell strength . 39
5.2.2 External tightness . 40
5.2.3 Internal sealing . 40
5.3 Control classifications . 40
5.3.1 Accuracy under stable conditions . 40
5.3.2 Lock-up behaviour . 40
5.3.3 Stable conditions . 41
5.4 Final visual inspection . 41
5.5 Fail-close conditions . 42
6 Gas pressure regulator sizing . 42
6.1 Flow behaviour . 42
2
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SIST EN 334:2005+A1:2009
EN 334:2005+A1:2009 (E)
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 . 43
6.2.1 Normal calculations . 43
6.2.2 Practical calculations . 43
6.2.3 Simplified calculations. 43
6.3 Calculation of the maximum accuracy flow rate . 44
6.4 Inherent flow characteristics . 44
6.5 Calculation of volumetric flow rates for partially open gas pressure regulators . 44
6.6 Flow coefficient . 44
7 Testing . 45
7.1 General . 45
7.2 Tests . 45
7.3 Type test . 46
7.4 Selection of test samples . 47
7.5 Routine tests . 47
7.6 Production surveillance . 47
7.7 Test and verification methods . 47
7.7.1 Dimensional check and visual inspection . 47
7.7.2 Materials check . 47
7.7.3 Verification of the strength of pressure containing parts and inner metallic partition walls . 48
7.7.4 Shell and inner metallic partition walls strength test . 49
7.7.5 Alternative shell and inner metallic partition walls strength test . 50
7.7.6 External tightness test . 50
7.7.7 Functional tests . 51
7.7.8 Final visual inspection . 64
8 Documentation . 64
8.1 Documentation related to type test . 64
8.1.1 Documentation required prior to type test . 64
8.1.2 Test report . 64
8.2 Documentation related to the routine tests . 64
8.2.1 Documentation provided at the request of the customer . 64
8.2.2 Documentation provided with the regulator . 65
8.3 Documentation related to production surveillance in accordance with 7.6. 65
8.3.1 Documentation to be available for production surveillance . 65
8.3.2 Production surveillance report . 66
9 Marking . 66
9.1 General requirements . 66
9.2 Markings for the various connections . 67
9.3 Marking of integrated safety devices . 67
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 . 68
A.1 General . 68
A.2 Test methods . 68
A.2.1 Direct acting gas pressure regulator . 68
A.2.2 Pilot controlled gas pressure regulators . 69
A.3 Determination of flow coefficients for larger capacity regulators . 70
Annex B (informative) Inspection certificate . 76
Annex C (informative) Acceptance test . 78
)
Annex D (informative) Compliance evaluation . 79
D.1 General . 79
D.2 Introduction . 79
D.3 Procedure . 79
D.4 Manufacturer’s compliance evaluation . 80
D.5 Issue of the certificate of compliance . 80
3
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SIST EN 334:2005+A1:2009
EN 334:2005+A1:2009 (E)
Annex E (informative) !!!!Seat leakage (alternative requirement)"""" . 81
Annex F (normative) Creep (venting) relief device . 82
F.1 General . 82
F.2 Terms and definitions . 82
F.3 Requirements . 82
F.3.1 Construction . 82
F.3.2 Functional requirements . 82
F.4 Testing . 82
F.5 Type test . 83
F.6 Routine tests . 83
F.7 Documentation . 83
F.8 Marking . 83
Annex G (informative) Order specification . 84
G.1 General . 84
G.2 Minimum specifications . 84
G.2.1 Details of construction . 84
G.2.2 Dimensions. 84
G.2.3 Performance . 84
G.3 Optional specifications . 85
Annex H (normative) Materials . 87
H.1 Steel materials for pressure containing parts and inner metallic partition walls . 87
H.2 Metallic materials different from steel materials for pressure containing parts and inner
metallic partition walls . 93
H.3 Materials for fixtures, integral process and sensing lines, connectors and fasteners . 98
Annex I (informative) !!!!Glossary . 101
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 97/23/EC . 103
Bibliography . 105
4
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SIST EN 334:2005+A1:2009
EN 334:2005+A1:2009 (E)
Foreword
This document (EN 334:2005+A1:2009) 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 July 2009, and conflicting national standards shall be withdrawn at the
latest by July 2009.
This document includes Amendment 1, approved by CEN on 2008-12-08.
This document supersedes !EN 334:2005".
The start and finish of text introduced or altered by amendment is indicated in the text by tags ! ".
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 corrosion resistance in case of environmental conditions where corrosion is likely
to occur".
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.
!deleted text"
!Continued" 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, Bulgaria, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and United Kingdom.
5
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SIST EN 334:2005+A1:2009
EN 334:2005+A1:2009 (E)
1 Scope
!This document specifies constructional, functional, testing and marking requirements, sizing and
documentation of gas pressure regulators used in the pressure regulating stations in accordance with
EN 12186 or EN 12279:"
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,
st nd
which operate with fuel gases of the 1 and 2 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.
!For standard regulators when used in pressure regulating stations complying with EN 12186 or EN 12279,
Annex ZA lists all applicable Essential Requirements except the external corrosion resistance in case of
environmental conditions where corrosion is likely to occur."
!This document considers the following classes/types of regulators:"
class 1: operating temperature range from -10 °C to 60 °C;
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 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;
!
1
regulators incorporated into pressure-regulating devices used in service lines with volumetric flow rate ≤
3
200 m /h at normal conditions and inlet pressure ≤ 5 bar;"
regulators for which a specific document exists (e.g. EN 88, etc.);
industrial process control valves in accordance with EN 1349.
)
1
!The services lines are those defined in EN 12279."
6
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SIST EN 334:2005+A1:2009
EN 334:2005+A1:2009 (E)
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.
!deleted text"
!EN 287-1, Qualification test of welders – Fusion welding – Part 1: Steel
!EN 473:2000", Non destructive testing – Qualification and certification of NDT personnel – General
principles
!deleted text"
!EN 970:1997", Non-destructive examination of fusion welds – Visual examination
!deleted text"
!EN 1092-1:2007, 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, Industrial process control valves
!EN 1418:1997", Welding personnel – Approval testing of welding operators for fusion welding and
resistance weld setters for fully mechanised and automatic welding of metallic materials
!deleted text"
!EN 1759-1, Flanges and their joint – Circular flanges for pipes, valves, fittings and accessories, Class
designated – Part 1: Steel flanges, NPS ½ to 24
EN 1759-3, Flanges and their joints – Circular flanges for pipes, valves, fittings and accessories, Class
designated – Part 3: Copper alloy flanges
EN 1759-4, Flanges and their joint – Circular flanges for pipes, valves, fittings and accessories, class
designated – Part 4: Aluminium alloy flanges"
EN 10045-1, Metallic materials – Charpy impact test – Part 1: Test method
!EN 10204:2004", Metallic products – Types of inspection documents
!EN 10226-1, 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, Pipe threads where pressure tight joints are made on the threads – Part 2: Taper external
threads and taper internal threads – Dimensions, tolerances and designation"
7
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SIST EN 334:2005+A1:2009
EN 334:2005+A1:2009 (E)
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
!deleted text"
!EN 12516-1:2005, Industrial valves – Shell design strength – Part 1: Tabulation method for st
...
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