SIST EN 88-2:2022
(Main)Safety and control devices for gas burners and gas burning appliances - Part 2: Pressure regulators for inlet pressures above 50 kPa up to and including 500 kPa
Safety and control devices for gas burners and gas burning appliances - Part 2: Pressure regulators for inlet pressures above 50 kPa up to and including 500 kPa
This European Standard specifies the safety, construction and performance requirements for pressure regulators (hereafter referred to as regulators) intended for use with gas burners and gas-burning appliances using fuel gases of the 1st, 2nd and 3rd families. This European Standard covers type testing only. It also provides additional information for the purchaser and user.
This European Standard is applicable to regulators that may be tested independently of gas burners and gas-burning appliances, which have a declared working pressure from above 500 mbar up to and including 5 bar.
This European Standard is also applicable to regulators incorporating safety devices.
NOTE 1 For safety accessories and pressure accessories, the requirements of EN 13611:2000, Annex F also apply.
NOTE 2 Regulators conforming to EN 88-2 fulfil also the requirements of EN 88-1.
Regulators intended to be used on pipe work installations for third family gases are also covered by EN 13785 and EN 13786.
This European Standard is not applicable to:
a) pressure regulators that are connected directly to mains pipe-work or to a container that maintains a standard distribution pressure;
b) pressure regulators which use electrical auxiliary energy.
pressure;
b) pressure regulators which use electrical auxiliary energy.
Sicherheits- und Regeleinrichtungen für Gasbrenner und Gasgeräte - Teil 2: Druckregler für Eingangsdrücke über 50 kPa bis einschließlich 500 kPa
Es gilt EN 13611:2019, Abschnitt 1 mit der folgenden Änderung und der folgenden Ergänzung:
Änderung:
Der 1. Absatz von EN 13611:2019, Abschnitt 1, wird durch Folgendes ersetzt:
Dieses Dokument legt die Sicherheits-, Auslegungs-, Konstruktions- und Leistungs¬anforderungen sowie die Prüfung von pneumatischen Druckreglern und Sicherheitseinrichtungen für Brenner und Brennstoffgeräte für einen oder mehrere gasförmige(n) Brennstoff(e) oder flüssige Brennstoffe, die im Folgenden als „Druckregler“ bezeichnet werden.
Dieses Dokument gilt für Druckregler mit angegebenen höchsten Eingangsdrücken über 50 kPa und bis einschließlich 500 kPa mit Anschlussnennweiten bis einschließlich DN 250.
Ergänzung:
Dieses Dokument ist anwendbar auf:
- Druckregler mit integrierten Sicherheitseinrichtungen;
- Druckregler und Sicherheitseinrichtungen, die elektrische Hilfsenergie benötigen;
- unabhängige Druckregler oder Druckregler mit einer Regeleinrichtung für höchsten oder niedrigsten Gasdruck.
Dieses Dokument ist nicht anwendbar auf:
- Druckregler, die unmittelbar an ein Gasverteilungsnetz oder an einen Behälter mit genormtem Verteilungsdruck angeschlossen sind;
- Druckregler für Gasgeräte in Freiluftausführung, die Umwelteinflüssen ausgesetzt sind.
Dispositifs de sécurité et de contrôle pour les brûleurs à gaz et appareils utilisant des combustibles gazeux - Partie 2 : Régulateurs de pression pour pressions amont comprises entre 50 kPa et 500 kPa
L’article 1 de la norme EN13611 :2019 s’applique avec la modification et l’addition suivantes :
Modification :
Le 1er paragraphe de l’article 1 de la norme EN13611 :2019 est remplacé par ce qui suit :
Le présent document prescrit les exigences et essais de sécurité, de conception, de construction et de fonctionnement relatives aux régulateurs de pression pneumatiques et dispositifs de sécurité pour brûleurs et appareils utilisant un ou plusieurs combustibles gazeux, dénommés ci-après « régulateurs de pression ».
Le présent document est applicable aux régulateurs de pression dont la pression amont maximale est comprise entre 50 kPa et 500 kPa, de diamètre nominal de raccordement inférieur ou égal à DN 250.
Addition :
Le présent document est applicable :
- aux régulateurs de pression à dispositifs de sécurité intégrés ;
- aux régulateurs de pression et aux dispositifs de sécurité qui utilisent une énergie électrique auxiliaire ; et
- aux régulateurs de pression autonomes ou aux régulateurs de pression équipés d'un dispositif de régulation pour pression de gaz maximale ou minimale.
Le présent document ne s'applique pas :
- aux régulateurs de pression qui sont raccordés directement au réseau de distribution ou à un récipient qui maintient en aval une valeur de pression de distribution normalisée ;
- aux régulateurs de pression destinés à des appareils à gaz qui doivent être installés en plein air et exposés aux intempéries.
Le 4ième paragraphe de l’article 1 de la EN 13611 :2019 est supprimé.
Varnostne in nadzorne naprave za plinske gorilnike in plinske aparate - 2. del: Regulatorji tlaka za vstopne tlake nad 50 kPa do vključno 500 kPa
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 88-2:2022
01-december-2022
Nadomešča:
SIST EN 88-2:2008
Varnostne in nadzorne naprave za plinske gorilnike in plinske aparate - 2. del:
Regulatorji tlaka za vstopne tlake nad 50 kPa do vključno 500 kPa
Safety and control devices for gas burners and gas burning appliances - Part 2: Pressure
regulators for inlet pressures above 50 kPa up to and including 500 kPa
Sicherheits- und Regeleinrichtungen für Gasbrenner und Gasgeräte - Teil 2: Druckregler
für Eingangsdrücke über 50 kPa bis einschließlich 500 kPa
Dispositifs de sécurité et de contrôle pour les brûleurs à gaz et appareils utilisant des
combustibles gazeux - Partie 2 : Régulateurs de pression pour pressions amont
comprises entre 50 kPa et 500 kPa
Ta slovenski standard je istoveten z: EN 88-2:2022
ICS:
23.060.40 Tlačni regulatorji Pressure regulators
27.060.20 Plinski gorilniki Gas fuel burners
SIST EN 88-2:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST EN 88-2:2022
---------------------- Page: 2 ----------------------
SIST EN 88-2:2022
EN 88-2
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2022
EUROPÄISCHE NORM
ICS 23.060.40 Supersedes EN 88-2:2007
English Version
Safety and control devices for gas burners and gas burning
appliances - Part 2: Pressure regulators for inlet pressures
above 50 kPa up to and including 500 kPa
Dispositifs de sécurité et de contrôle pour les brûleurs Sicherheits- und Regeleinrichtungen für Gasbrenner
à gaz et appareils utilisant des combustibles gazeux - und Gasgeräte - Teil 2: Druckregler für Eingangsdrücke
Partie 2 : Régulateurs de pression pour pressions über 50 kPa bis einschließlich 500 kPa
amont comprises entre 50 kPa et 500 kPa
This European Standard was approved by CEN on 8 August 2022.
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, Türkiye 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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 88-2:2022 E
worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 88-2:2022
EN 88-2:2022 (E)
Contents Page
European foreword . 4
Introduction . 6
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 9
4 Classification . 14
4.1 Classes of control . 14
4.2 Groups of control . 14
4.3 Classes of control functions . 14
4.4 Types of DC supplied controls . 14
5 Test conditions and uncertainty of measurements . 14
6 Design and construction . 15
6.1 General . 15
6.2 Mechanical parts of the control . 15
6.3 Materials . 17
6.4 Gas connections . 18
6.5 Electrical parts of the control . 18
6.6 Protection against internal faults for the purpose of functional safety . 18
7 Performance . 18
7.1 General . 18
7.2 Leak-tightness . 19
7.3 Torsion and bending . 19
7.4 Rated flow rate . 19
7.5 Durability . 20
7.6 Performance tests for electronic controls . 20
7.7 Long-term performance for electronic controls . 20
7.8 Data exchange . 20
7.101 Pressure regulator performance . 20
7.102 Safety devices . 26
8 Electrical requirements . 31
8.1 General . 31
8.2 Protection by enclosure . 31
8.101 Plug connections. 31
9 Electromagnetic compatibility (EMC) . 32
9.1 Protection against environmental influences . 32
9.2 Supply voltage variations below 85 % of rated voltage . 32
9.3 Voltage dips and interruptions . 32
9.4 Supply frequency variations . 32
9.5 Surge immunity tests . 32
9.6 Electrical fast transient/burst . 32
9.7 Immunity to conducted disturbances induced by radio frequency fields . 32
9.8 Immunity to radiated disturbances induced by radio frequency fields . 32
9.9 Electrostatic discharge tests . 32
9.10 Power frequency magnetic field immunity tests . 32
9.11 Harmonics and interharmonics including mains signalling at a. c. power port, low
frequency immunity tests . 32
2
---------------------- Page: 4 ----------------------
SIST EN 88-2:2022
EN 88-2:2022 (E)
10 Marking, instructions . 33
10.1 Marking . 33
10.2 Instructions . 33
10.3 Warning notice . 34
Annex A (informative) Abbreviations and Symbols . 35
Annex B (informative) Leak-tightness tests for gas controls – volumetric method . 36
Annex C (informative) Leak-tightness tests for gas controls – pressure loss method . 37
Annex D (normative) Conversion of pressure loss into leakage rate . 38
Annex E (normative) Electrical/electronic component fault modes . 39
Annex F (normative) Additional requirements for safety accessories and pressure
accessories as defined in EU Directive 2014/68/EU. 40
Annex G (normative) Materials for pressurized parts . 41
Annex H (normative) Additional materials for pressurized parts . 42
Annex I (normative) Requirements for controls used in DC supplied burners and
appliances burning gaseous or liquid fuels. 43
Annex J (normative) Method for the determination of a Safety Integrity Level (SIL) . 44
Annex K (normative) Method for the determination of a Performance Level (PL) . 45
Annex L (informative) Relationship between Safety Integrity Level (SIL) and Performance
Level (PL) . 46
Annex M (normative) Reset functions . 47
Annex N (informative) Guidance document on Environmental Aspects . 48
Annex O (normative) Seals of elastomer, cork and synthetic fibre mixtures . 49
Annex AA (informative) Typical pressure regulators and safety devices . 50
AA.1 Main components of a pressure regulator . 50
AA.2 Main components of a safety shut-off device . 53
Annex BB (informative) Overview of requirements and test conditions (as given in 7.101),
and examples of performance curves for pressure regulators . 55
Annex CC (normative) Creep relief device . 58
CC.1 General . 58
CC.2 Design and construction . 58
CC.3 Performance requirements . 58
CC.4 Marking, instructions . 58
Annex DD (informative) Comparison between EN 334:2019 and EN 88-2:2022 . 59
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Regulation (EU) 2016/426 aimed to be covered . 60
Bibliography . 63
3
---------------------- Page: 5 ----------------------
SIST EN 88-2:2022
EN 88-2:2022 (E)
European foreword
This document (EN 88-2:2022) has been prepared by Technical Committee CEN/TC 58 “Safety and
control devices for burners and appliances burning gaseous or liquid fuels”, the secretariat of which is
held by BSI.
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 April 2023, and conflicting national standards shall be
withdrawn at the latest by October 2025.
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 88-2:2007.
The following significant changes compared to the previous edition have been incorporated in this
document:
a) scope extended to “Pressure regulators incorporating safety devices”;
b) title changed to be aligned with the title of CEN/TC 58;
c) requirements from EU Directive 2014/68/EU were not adopted;
d) alignment with EN 13611:2019;
e) terms and definitions are aligned with EN 13611:2019;
f) reference to EN 437 removed;
g) requirements and tests added for pressure regulators which use auxiliary energy;
h) classifications according to accuracy, lock-up pressure, and over-pressure shut-off added;
i) Clause 6 extended to “Design and construction”;
j) 6.2.104 “Integral safety shut-off device” added;
k) 6.2.105 “Resistance to pressure” added;
l) 6.2.107 “Creep relief device” added;
m) 6.5.1 “Electronic parts of the control – General” is applicable;
n) 7.2.2 “Test for leak-tightness”, new value for test pressure;
o) design of all figures adapted to design of figures in EN 13611:2019;
p) information on life time for safe function (designed lifetime) added to instructions;
q) Annex BB “Overview of requirement and test conditions” added;
r) Annex CC “Creep relief device” added;
4
---------------------- Page: 6 ----------------------
SIST EN 88-2:2022
EN 88-2:2022 (E)
s) Annex DD “Comparison between EN 334:2019 and EN 88-2:2022” added;
t) EN 88-1, EN 88-2 and EN 88-3 aligned.
This document has been prepared under a Standardization Request given to CEN by the European
Commission and the European Free Trade Association, and supports essential requirements of EU
Directive(s) / Regulation(s).
For relationship with EU Directive(s) / Regulation(s), see informative Annex ZA, which is an integral part
of this document.
The EN 88 series consists of the following parts:
— EN 88-1, Safety and control devices for gas burners and gas burning appliances — Part 1: Pressure
regulators for inlet pressures up to and including 50 kPa;
— EN 88-2, Safety and control devices for gas burners and gas burning appliances — Part 2: Pressure
regulators for inlet pressures above 50 kPa up to and including 500 kPa;
— EN 88-3, Safety and control devices for gas burners and gas burning appliances — Part 3: Pressure
and/or flow rate regulators for inlet pressures up to and including 500 kPa, electronic types.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
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, Türkiye and the United
Kingdom.
5
---------------------- Page: 7 ----------------------
SIST EN 88-2:2022
EN 88-2:2022 (E)
Introduction
This document is intended to be used in conjunction with EN 13611:2019.
EN 13611:2019 recognizes the safety level specified by CEN/TC 58 and is regarded as a horizontal
standard dealing with the safety, construction, performance and testing of controls for burners and
appliances burning gaseous and/or liquid fuels.
The general requirements for controls are given in EN 13611:2019, and methods for classification and
assessment for new controls and control functions are given in EN 14459:2021 (see Figure 1).
EN 126:2012 (see Figure 1) specifies multifunctional controls combining two or more controls and
Application Control Functions, one of which is a mechanical control function. The requirements for
controls and Application Control Functions are given in the specific control standard (see Figure 1,
control functions).
Figure 1 — Interrelation of control standards
EN 13611:2019 should be used in conjunction with the specific standard for a specific type of control (e.g.
EN 88-1:2022, EN 88-2:2022, EN 88-3:2022, EN 125:2022, EN 126:2012, EN 161:2022, EN 257:2022,
1
EN 298:2022, EN 1106:2022, EN 1643:2022, EN 1854:— , EN 12067-2:2022, EN 16304:2022,
EN 16340:2014, EN 16678:2022 and EN 16898:2022), or for controls for specific applications.
EN 13611:2019 can also be applied, so far as reasonable, to controls not mentioned in a specific standard
and to controls designed on new principles, in which case additional requirements can be necessary.
EN 14459:2021 provides methods for classification and assessment of new control principles.
Primarily in industrial applications it is common practice to rate the safety of a plant based on values
describing the likelihood of a dangerous failure. These values are being used to determine Safety Integrity
Levels or Performance Levels when the system is being assessed in its entirety.
CEN/TC 58 standards for safety relevant controls do go beyond this approach, because for a certain life
time for which the product is specified, designed and tested a dangerous failure is not allowed at all.
Failure modes are described and assessed in greater detail.
1
Under preparation. Stage at the time of publication: FprEN 1854:2022.
6
---------------------- Page: 8 ----------------------
SIST EN 88-2:2022
EN 88-2:2022 (E)
Measures to prevent from dangerous situations are defined. Field experience over many decades is
reflected in the CEN/TC 58 standards. Requirements of EN 13611:2019 can be considered as proven in
practice.
This document refers to clauses of EN 13611:2019 or adapts clauses by stating “with the following
modification”, “with the following addition”, “is replaced by the following” or “is not applicable” in the
corresponding clause.
This document adds clauses or subclauses to the structure of EN 13611:2019 which are particular to this
document. Subclauses which are additional to those in EN 13611:2019 are numbered starting from 101.
Additional Annexes are designated as Annex AA, BB, CC, etc. It should be noted that these clauses,
subclauses and Annexes are not indicated as an addition.
If by reference to EN 13611:2019 the term “control” is given, this term should be read as “pressure
regulator”.
7
---------------------- Page: 9 ----------------------
SIST EN 88-2:2022
EN 88-2:2022 (E)
1 Scope
EN 13611:2019, Clause 1 applies with the following modification and addition:
Modification:
st
The 1 paragraph of EN 13611:2019, Clause 1 is replaced by:
This document specifies the safety, design, construction, and performance requirements and testing for
pneumatic pressure regulators and safety devices for burners and appliances burning one or more
gaseous fuels, hereafter referred to as “pressure regulators”.
This document is applicable to pressure regulators with declared maximum inlet pressures above 50 kPa
up to and including 500 kPa and of nominal connection sizes up to and including DN 250.
Addition:
This document is applicable to:
— pressure regulators incorporating safety devices;
— pressure regulators and safety devices which use auxiliary energy;
— stand-alone pressure regulators or pressure regulators equipped with a control device for maximum
or minimum gas pressure.
This document is not applicable to:
— pressure regulators connected directly to a gas distribution network or to a container that maintains
a standard distribution pressure;
— pressure regulators intended for gas appliances to be installed in the open air and exposed to the
environment.
th
The 4 paragraph of EN 13611:2019, Clause 1 is removed.
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 161:2022, Automatic shut-off valve for gas burners and gas appliances
EN 549:2019, Rubber materials for seals and diaphragms for gas appliances and gas equipment
2
EN 682:2002 , Elastomeric seals — Materials requirements for seals used in pipes and fittings carrying gas
and hydrocarbon fluids
3
EN 13611:2019 , Safety and control devices for burners and appliances burning gaseous and/or liquid fuels
— General requirements
2
As impacted by EN 682:2002/A1:2005.
3
As impacted by EN 13611:2019/AC:2021.
8
---------------------- Page: 10 ----------------------
SIST EN 88-2:2022
EN 88-2:2022 (E)
EN 60534-2-3:2016, Industrial-process control valves — Part 2-3: Flow capacity — Test procedures
(IEC 60534-2-3:2015)
EN 175301-803:2006, Detail Specification: Rectangular connectors — Flat contacts, 0,8 mm thickness,
locking screw not detachable
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 13611:2019 and the following
apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.101
pressure regulator
device which maintains the outlet pressure constant independent of the variations in inlet pressure
and/or flow rate within defined limits
[SOURCE: EN 88-1:2022, 3.101]
3.102
control member
movable part of the pressure regulator which varies flow rate and/or outlet pressure directly
[SOURCE: EN 88-1:2022, 3.107]
3.103
safety shut-off device
SSD
device having the function of staying in the open position under normal operating conditions and to shut
off the gas flow automatically and completely when the monitored pressure deviates above or below the
pre-set value
3.104
housing
part of the pressure regulator and/or SSD that is the main pressure containing envelope
3.105
controller
device which normally includes a setting element, normally a spring, to obtain a set value of the outlet
pressure, and a pressure detector element, normally a diaphragm for the outlet pressure
3.106
actuator
device or mechanism which changes the signal from the controller into a corresponding movement
controlling the position of the control member
9
---------------------- Page: 11 ----------------------
SIST EN 88-2:2022
EN 88-2:2022 (E)
3.107
working diaphragm
flexible member which, under the influence of the forces arising from loading and pressure, operates the
control member
Note 1 to entry: Diaphragms used as a control member are not covered by this definition.
[SOURCE: EN 88-1:2022, 3.122, modified – Note 1 to entry added]
3.108
pressure containing part
part where failure would result in release of gas to the atmosphere
Note 1 to entry: Such parts comprise housings, inner partition walls, control member, bonnets, the housing of the
actuator, blind flanges and pipes for process and sensing lines.
3.109
signal connection
connection that is used to convey pressure from part of an installation to the signal chamber
[SOURCE: EN 88-1:2022, 3.128]
3.110
breather line
line between the controller and/or pilot regulator and atmosphere which equalizes the pressure on a
detector element when it changes its position
3.111
fixture
functional device connected to the main components of the pressure regulator or SSD
3.112
exhaust line
line to atmosphere between the pressure regulator or fixtures for the safe venting of gas in the event of a
working diaphragm failure
3.113
trip mechanism
mechanism that releases the closure member when activated by the controller
3.114
SSD-actuator
device that is activated by the trip mechanism which shuts the closure member
3.115
relatching device
device that enables the complete opening of an SSD
3.116
motorization chamber
chamber at the higher pressure of two chambers under pressure within the housing of actuator
10
---------------------- Page: 12 ----------------------
SIST EN 88-2:2022
EN 88-2:2022 (E)
3.117
monitored pressure
pressure monitored and safeguarded by the SSD
3.118
trip pressure
pressure value at which the closing member starts to move
3.119
upper trip pressure
p
2o
upper limit of the monitored over-pressure
3.120
lower trip pressure
p
2u
lower limit of the monitored under-pressure
3.121
outlet setting pressure
p
2s
outlet pressure at which the pressure regulator is set for test purposes
[SOURCE: EN 88-1:2022, 3.115]
3.122
maximum outlet pressure
p
2max
upper limit of the outlet pressure, as stated in the instructions, at which the pressure regulator can be
operated
[SOURCE: EN 88-1:2022, 3.111]
3.123
minimum outlet pressure
p
2min
lower limit of the outlet pressure, as stated in the instructions, at which the pressure regulator can be
operated
[SOURCE: EN 88-1:2022, 3.112]
3.124
outlet pressure range
difference between maximum and minimum values of the outlet pressure, as stated in the instructions
[SOURCE: EN 88-1:2022, 3.111]
11
---------------------- Page: 13 ----------------------
SIST EN 88-2:2022
EN 88-2:2022 (E)
3.125
maximum inlet pressure
p
1max
highest inlet pressure, as stated in the instructions, at which the pressure regulator can be operated
Note 1 to entry: The definition of “maximum inlet pressure” is also known as “maximum allowable pressure PS”.
Note 2 to entry: In accordance with the strength requirements of this document.
3.126
minimum inlet pressure
p
1min
lowest inlet pressure, as stated in the instructions, at which the pressure regulator can be operated
...
SLOVENSKI STANDARD
oSIST prEN 88-2:2020
01-maj-2020
Varnostne in nadzorne naprave za plinske gorilnike in plinske aparate - 2. del:
Regulatorji tlaka za vstopne tlake nad 50 kPa do vključno 500 kPa in pripadajoče
varnostne naprave
Safety and control devices for gas burners and gas burning appliances - Part 2: Pressure
regulators for inlet pressures above 50 kPa up to and including 500 kPa and associated
safety devices
Sicherheits- und Regeleinrichtungen für Gasbrenner und Gasgeräte - Teil 2: Druckregler
für Eingangsdrücke über 50 kPa bis einschließlich 500 kPa und dazugehörigen
Sicherheitseinrichtungen
Dispositifs de sécurité et de contrôle pour les brûleurs à gaz et appareils utilisant des
combustibles gazeux - Partie 2 : Régulateurs de pression pour pressions amont
comprises entre 50 kPa et 500 kPa et dispositifs de sécurité associés
Ta slovenski standard je istoveten z: prEN 88-2
ICS:
23.060.40 Tlačni regulatorji Pressure regulators
27.060.20 Plinski gorilniki Gas fuel burners
oSIST prEN 88-2:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
oSIST prEN 88-2:2020
---------------------- Page: 2 ----------------------
oSIST prEN 88-2:2020
DRAFT
EUROPEAN STANDARD
prEN 88-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2020
ICS 23.060.40 Will supersede EN 88-2:2007
English Version
Pressure regulators and associated safety devices for gas
appliances - Part 2: Pressure regulators for inlet pressures
above 500 mbar up to and including 5 bar
Dispositifs de sécurité et de contrôle pour les brûleurs Sicherheits- und Regeleinrichtungen für Gasbrenner
à gaz et appareils utilisant des combustibles gazeux - und Gasgeräte - Teil 2: Druckregler für Eingangsdrücke
Partie 2 : Régulateurs de pression pour pressions über 50 kPa bis einschließlich 500 kPa und
amont comprises entre 50 kPa et 500 kPa et dispositifs dazugehörigen Sicherheitseinrichtungen
de sécurité associés
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 58.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 88-2:2020 E
worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
oSIST prEN 88-2:2020
prEN 88-2:2020 (E)
Contents Page
European foreword . 5
Introduction . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Classification . 12
4.1 Classes of control . 12
4.2 Groups of control . 13
4.3 Classes of control function . 13
4.4 Types of DC supplied controls . 13
5 Test conditions and uncertainty of measurements . 13
6 Design and construction . 13
6.1 General . 13
6.2 Mechanical parts of the control . 13
6.2.1 Appearance . 13
6.2.2 Holes . 13
6.2.3 Breather holes . 13
6.2.4 Screwed fastenings . 13
6.2.5 Jointing . 13
6.2.6 Moving parts . 13
6.2.7 Sealing caps . 13
6.2.8 Dismantling and reassembly . 14
6.2.9 Auxiliary canals and orifices . 14
6.2.10 Presetting device . 14
6.2.101 External visual Indication of the position of the closure member . 14
6.2.102 Parts transmitting actuating forces . 14
6.2.103 Adjustments . 14
6.2.104 Integral safety shut-off device . 14
6.2.105 Resistance to pressure . 15
6.2.106 Signal tube connections . 15
6.2.107 Creep relief device . 15
6.3 Materials . 16
6.3.1 General material requirements . 16
6.3.2 Housing . 16
6.3.3 Zinc alloys . 16
6.3.4 Springs . 16
6.3.5 Resistance to corrosion and surface protection . 16
6.3.6 Impregnation . 16
6.3.7 Seals for glands for moving parts . 16
6.4 Gas connections . 16
6.5 Electrical parts of the control . 16
6.6 Protection against internal faults for the purpose of functional safety . 16
7 Performance . 16
7.1 General . 16
7.2 Leak-tightness . 17
2
---------------------- Page: 4 ----------------------
oSIST prEN 88-2:2020
prEN 88-2:2020 (E)
7.2.1 Requirements . 17
7.2.2 Tests . 17
7.3 Torsion and bending . 17
7.4 Rated flow rate . 17
7.4.1 Requirement . 17
7.4.2 Test . 17
7.4.3 Conversion of air flow rate . 17
7.5 Durability. 17
7.5.1 Elastomers in contact with gas . 17
7.5.2 Marking . 18
7.5.3 Resistance to scratching . 18
7.5.4 Resistance to humidity . 18
7.6 Performance tests for electronic controls . 18
7.7 Long-term performance for electronic controls . 18
7.8 Data exchange . 18
7.101 Pressure regulator performance . 18
7.101.1 General . 18
7.101.2 General test procedure . 18
7.102 Safety devices . 24
7.102.1 Over-pressure safety shut-off devices . 24
7.102.2 Under-pressure safety shut-off devices . 28
7.102.3 Endurance . 28
8 Electrical requirements . 29
9 Electromagnetic compatibility (EMC) . 29
10 Marking, installation and operating instructions . 29
10.1 Marking . 29
10.2 Installation and operating instructions . 30
10.3 Warning notice . 30
Annex A (informative) Abbreviations and Symbols . 31
Annex B (informative) Leak-tightness tests for gas controls – volumetric method . 32
Annex C (informative) Leak-tightness tests for gas controls – pressure loss method . 33
Annex D (normative) Conversion of pressure loss into leakage rate . 34
Annex E (normative) Electrical/electronic component fault modes . 35
Annex F (normative) Additional requirements for safety accessories and pressure
accessories as defined in EU Directive 97/23/EC . 36
Annex G (normative) Materials for pressurized parts . 37
Annex H (normative) Additional materials for pressurized parts . 38
Annex I (normative) Requirements for controls used in DC supplied burners and
appliances burning gaseous or liquid fuels. 39
Annex J (normative) Method for the determination of a Safety Integrity Level (SIL) . 40
Annex K (normative) Method for the determination of a Performance Level (PL) . 41
Annex L (informative) Relationship between Safety Integrity Level (SIL) and Performance
Level (PL) . 42
Annex M (normative) Reset functions . 43
Annex N (informative) Guidance document on environmental aspects . 44
3
---------------------- Page: 5 ----------------------
oSIST prEN 88-2:2020
prEN 88-2:2020 (E)
Annex O (normative) Seals of elastomer, cork and synthetic fibre mixtures . 45
Annex AA (informative) Typical pressure regulators and pressure regulator parts . 46
AA.1 Main components of a pressure regulator . 46
AA.2 Main components of a gas safety shut-off device . 49
Annex BB (informative) Overview of requirements and test conditions (as given in
Clause 7), and examples of performance curves for pressure regulators . 51
Annex CC (normative) Creep relief device . 54
CC.1 General . 54
CC.2 Terms and definitions . 54
CC.3 Design and construction . 54
CC.4 Performance requirements . 54
CC.5 Marking, installation and operating instructions . 55
Annex DD (informative) Comparison between EN 334:2005+A1:2009 and prEN 88-2:2020 . 56
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Regulation (EU) 2016/426 aimed to be covered . 57
Annex ZB (informative) Relationship between this European Standard and the essential
requirements of Directive 2014/68/EU aimed to be covered . 63
Bibliography . 65
4
---------------------- Page: 6 ----------------------
oSIST prEN 88-2:2020
prEN 88-2:2020 (E)
European foreword
This document (prEN 88-2:2020) has been prepared by Technical Committee CEN/TC 58 “Safety and
control devices for burners and appliances burning gaseous or liquid fuels”, the secretariat of which is
held by BSI.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 88-2:2007.
This document has been prepared under a standardization request 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 Annexes ZA and ZB, which are an integral part of
this document.
prEN 88-2:2020 includes the following significant technical changes with respect to EN 88-2:2007:
a) scope extended to “Pressure regulators incorporating safety devices”;
b) alignment with EN 13611:2019;
c) requirements and tests added for pressure regulators which use auxiliary energy;
d) classifications according to accuracy, lock-up pressure, and over-pressure shut-off added;
e) Clause 6 extended to “Design and construction”;
f) Clause 6.2.104 “Integral safety shut-off device” added;
g) Clause 6.2.105 “Resistance to pressure” added;
h) Clause 6.2.107 “Creep relief device” added;
i) Clause 7.2.2 “Test for leak-tightness”, new value for test pressure;
j) design of all Figures adapted to design of Figures in EN 13611:2019;
k) Annex BB “Overview of requirement and test conditions” added;
l) Annex CC “Creep relief device” added;
m) Annex DD “Comparison between EN 334:2005+A1:2009 and prEN 88-2:2020” added.
EN 88 consists of the following parts:
— Part 1: Pressure regulators for inlet pressures up to and including 50 kPa;
— Part 2: Pressure regulators for inlet pressures above 500 mbar up to and including 5 bar;
— Part 3: Pressure and/or flow rate regulators for inlet pressures up to and including 500 kPa, electronic
types.
5
---------------------- Page: 7 ----------------------
oSIST prEN 88-2:2020
prEN 88-2:2020 (E)
Introduction
This document is a particular standard for pressure Regulators for gas-burners and gas-burning
appliances which cites the generic requirements of EN 13611:2019 wherever possible. This document
supplements or modifies the corresponding clauses of EN 13611:2019. The construction and
performance requirements are as far as applicable in total conformity with EN 13611:2019.
This document is intended to be used in conjunction with EN 13611:2019. This document refers to
clauses of EN 13611:2019 or adapts clauses by stating “with the following modification”, “with the
following addition”, “is replaced by the following” or “is not applicable” in the corresponding clause.
This document adds clauses or subclauses to the structure of EN 13611:2019 which are particular to
this document. It should be noted that these clauses and subclauses are not indicated as an addition.
Subclauses which are additional to those in EN 13611:2019 are numbered starting from 101. Additional
Annexes are designed as Annex AA, BB, CC, etc.
Performance Level (PL) or Safety Integrity Level (SIL) classifications according to EN ISO 13849-1 or
EN 61508-1 cannot automatically be claimed based upon compliance with this document. Pressure
regulators with SIL classification do not automatically meet the requirements of this document.
6
---------------------- Page: 8 ----------------------
oSIST prEN 88-2:2020
prEN 88-2:2020 (E)
1 Scope
This document specifies the safety, design, construction as well as performance requirements and
testing for pneumatic pressure regulators and safety devices for burners and appliances burning one or
more gaseous fuels, hereafter referred to as ‘pressure regulators’.
This document is applicable to:
— pressure regulators with declared maximum inlet pressure above 50 kPa up to and including
500 kPa, of nominal connection size up to and including DN 250 for use with one or more fuel gases
in accordance with EN 437;
— pressure regulators incorporating safety devices;
— pressure regulators and safety devices which use auxiliary energy; and
— stand-alone pressure regulators or pressure regulators equipped with a control device for
maximum or minimum gas pressure.
This document is not applicable to:
— pressure regulators that are connected directly to mains pipe-work or to a container that maintains
a standard distribution pressure;
— pressure regulators intended for gas appliances to be installed in the open air and exposed to the
environment.
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, Rubber materials for seals and diaphragms for gas appliances and gas equipment
EN 682, Elastomeric Seals - Materials requirements for seals used in pipes and fittings carrying gas and
hydrocarbon fluids
EN 13611:2019, Safety and control devices for burners and appliances burning gaseous and/or liquid
fuels - General requirements
EN 13787, Elastomers for gas pressure regulators and associated safety devices for inlet pressures up to
100 bar
EN 60534-2-3:2016, Industrial-process control valves - Part 2-3: Flow capacity - Test procedures (IEC
60534-2-3)
7
---------------------- Page: 9 ----------------------
oSIST prEN 88-2:2020
prEN 88-2:2020 (E)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 13611:2019 and the following
apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
3.101
pressure regulator
device that maintains the outlet pressure constant independent of the variations in inlet pressure
and/or flow rate within defined limits
[SOURCE: EN 88-1:2011+A1:2016, 3.101]
3.102
control member
movable part of the pressure regulator which varies flow rate and/or outlet pressure directly
[SOURCE: EN 88-1:2011+A1:2016, 3.107]
3.103
safety shut-off device
SSD
device the function of which is to stay in the open position under normal operating conditions and to
shut off the gas flow automatically and completely when the monitored pressure deviates above or
below the pre-set value
3.104
housing
part of the pressure regulator and/or SSD that is the main pressure containing envelope
3.105
valve seat
corresponding sealing surfaces within a pressure regulator or SSD that make full contact only when the
pressure regulator or SSD is in the closed position
3.106
controller
device which normally includes a setting element, normally a spring, to obtain a set value of the outlet
pressure and a pressure detector element, normally a diaphragm for the outlet pressure
3.107
actuator
device or mechanism which changes the signal from the controller into a corresponding movement
controlling the position of the control member
8
---------------------- Page: 10 ----------------------
oSIST prEN 88-2:2020
prEN 88-2:2020 (E)
3.108
working diaphragm
flexible member which, under the influence of the forces arising from loading and pressure, operates
the control member
Note 1 to entry: Diaphragms used as a control member are not covered by this definition.
3.109
pressure containing part
part where failure would result in release of gas to the atmosphere
Note 1 to entry: Such parts comprise housings, inner partition walls, control member, bonnets, the housing of
the actuator, blind flanges and pipes for process and sensing lines.
3.110
signal connection
part that is used to convey pressure from part of an installation to the signal chamber
3.111
breather line
line between the controller and/or pilot regulator and atmosphere which equalizes the pressure on a
detector element when it changes its position
3.112
fixture
functional device connected to the main components of the pressure regulator or SSD
3.113
exhaust line
line to atmosphere between the regulator or fixtures for the safe venting of gas in the event of a
component failure
3.114
trip mechanism
mechanism that releases the closure member when activated by the controller
3.115
SSD-actuator
device that is activated by the trip mechanism which shuts the closure member
3.116
relatching device
device that enables the complete opening of an SSD
3.117
motorization chamber
chamber at the higher pressure of two chambers under pressure within the housing of actuator
3.118
monitored pressure
pressure monitored and safeguarded by the SSD
9
---------------------- Page: 11 ----------------------
oSIST prEN 88-2:2020
prEN 88-2:2020 (E)
3.119
trip pressure
pressure value at which the closing member starts to move
3.120
upper trip pressure
p
do
upper limit of the monitored over-pressure
3.121
lower trip pressure
p
u
lower limit of the monitored under-pressure
3.122
outlet setting pressure
p
2s
outlet pressure at which the pressure regulator is set for test purposes
[SOURCE: EN 88-1:2011+A1:2016, 3.113]
3.123
maximum outlet pressure
p
2max
upper limit of the outlet pressure, as stated in the installation and operating instructions
[SOURCE: EN 88-1:2011+A1:2016, 3.109]
3.124
minimum outlet pressure
p
2min
lower limit of the outlet pressure, as stated in the installation and operating instructions
[SOURCE: EN 88-1:2011+A1:2016, 3.110]
3.125
outlet pressure
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.