FprEN 88-2

SLOVENSKI STANDARD
oSIST prEN 88-2:2015
01-februar-2015
9DUQRVWQHLQQDG]RUQHQDSUDYH]DSOLQVNHJRULOQLNHLQSOLQVNHDSDUDWHGHO
7ODþQLUHJXODWRUML]DYVWRSQHWODNHQDGN3DGRYNOMXþQRN3DLQSULSDGDMRþH
YDUQRVWQHQDSUDYH
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 rev
ICS:
23.060.40 7ODþQLUHJXODWRUML Pressure regulators
oSIST prEN 88-2:2015 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 88-2:2015
oSIST prEN 88-2:2015
EUROPEAN STANDARD
DRAFT
prEN 88-2 rev
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2014
ICS 23.060.40 Will supersede 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 and associated safety
devices
Dispositifs de sécurité et de contrôle pour les brûleurs à gaz Sicherheits- und Regeleinrichtungen für Gasbrenner und
et appareils utilisant des combustibles gazeux - Partie 2: Gasgeräte - Teil 2: Druckregler für Eingangsdrücke über 50
Régulateurs de pression pour pressions amont comprises kPa bis einschließlich 500 kPa und dazugehörigen
entre 50 kPa et 500 kPa et dispositifs de sécurité associés Sicherheitseinrichtungen
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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
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: Avenue Marnix 17, B-1000 Brussels
© 2014 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 88-2 rev:2014 E
worldwide for CEN national Members.

oSIST prEN 88-2:2015
prEN 88-2:2014 (E)
Contents
Page
Foreword .4
1 Scope .7
2 Normative references .7
3 Terms and definitions .8
4 Classification . 12
5 Units of measurement and test conditions . 12
6 Design and construction . 13
7 Performance requirements . 16
8 Electrical requirements . 29
9 Electromagnetic compatibility (EMC) . 29
10 Marking, installation and operating instructions . 29
Annex A (informative) Void . 31
Annex B (informative) Leak-tightness test for gas controls – volumetric method . 32
Annex C (informative) Leak-tightness test 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
Annex O (normative) Seals of elastomer, cork and synthetic fibre mixtures. 45
Annex AA (informative) Typical pressure regulators and pressure regulator parts . 46
Annex BB (informative) Overview of requirements and test conditions (as given in Clause 7), and
examples of performance curves for pressure regulators . 49
Annex CC (normative) Creep relief device . 52
Annex DD (informative) Comparison between EN 334:2012-05 and EN 88-2:2013-04 . 54
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2009/142/EC relating to appliances burning gaseous fuels . 55
oSIST prEN 88-2:2015
prEN 88-2:2014 (E)
Annex ZB (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 97/23/EC concerning pressure equipment . 57
Bibliography . 59

Figures
Figure 1 — Performance test apparatus . 19
Figure 2 — Graphical representation of 7.101.2.5.2 . 22
Figure 3 — Performance test apparatus for SSDs . 25
Figure 4 — Measurement of response time . 27
Figure AA.1 — Example of a direct acting regulator . 46
Figure AA.2 — Example of regulator using auxiliary energy . 47
Figure AA.3 — Example of a pilot controlled regulator . 47
Figure AA.4 — Example of a direct acting safety shut-off device . 48
Figure BB.1 — Example for pressure regulator including maximum outlet pressure variations for constant
outlet setting pressure p and lock-up pressure p including typical results . 50
2s 2f
Figure BB.2 — Example for pressure regulator including maximum outlet pressure variations for adjustable
outlet setting pressures p , p , and lock-up pressures p , p , including typical results
2smin 2smax 2fmin 2fmax
..................................................................................................................................................................... 51
Tables
Table 1 — Minimum value of safety factor F . 15
Table 2 — Accuracy classes . 20
Table 3 — Lock-up pressure classes . 21
Table 4 — Specified accuracy classes for over- and under-pressure shut-off devices . 24
Table BB.1 — Setting and performance . 49
Table DD.1 — Comparison between EN 334:2005+A1:2009 and prEN 88-2:2013 . 54
Table ZA.1 — Correspondence between this European Standard and Directive 2009/142/EC relating to
appliances burning gaseous fuels . 55
Table ZB.1 — Correspondence between this European Standard and Directive 97/23/EC concerning pressure
equipment . 57

oSIST prEN 88-2:2015
prEN 88-2:2014 (E)
Foreword
This document (prEN 88-2:2014) 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 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 and ZB, which is an integral part of this
document.
For this European Standard a transition period of 3 years is proposed.
It should be noted that the following significant technical changes compared to the previous edition have been
incorporated in this European Standard:
a) scope enlarged to “Pressure regulators incorporating safety devices";
b) alignment with prEN 13611:2012;
c) requirements and tests added for pressure regulators which use auxiliary energy;
d) classifications according to accuracy, lock-up, and overpressure shut-off added;
e) clause 6 enlarged 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 7.3 “Test for leak-tightness”, new value for test pressure;
j) design of all Figures adapted to design of Figures in EN 13611;
k) annex BB “Overview of requirement and test conditions” added;
l) annex CC “Creep relief device” added;
m) annex DD “Comparison between EN 334:2012 and EN 88-2:2013” added.
EN 88 consists of the following parts, under the general title Pressure regulators and associated safety
devices for gas appliances:
 Part 1: Pressure regulators for inlet pressures up to and including 50 kPa
 Part 2: Pressure regulators for inlet pressure above 50 kPa up to and including 500 kPa and associated
safety devices
oSIST prEN 88-2:2015
prEN 88-2:2014 (E)
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 European Standard. Pressure
regulators with SIL classification do not meet automatically the requirements of this standard.
oSIST prEN 88-2:2015
prEN 88-2:2014 (E)
Introduction
This standard is a particular standard for Pressure Regulators for gas-burners and gas-burning appl
...