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SIST EN 161:2011/oprA1:2011
01-junij-2011
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Automatic shut-off valves for gas burners and gas appliances - Special requirements to
determine the performance level (PL)
Automatische Absperrventile für Gasbrenner und Gasgeräte - Besondere Anforderungen
zur Bestimmung des Performance Levels (PL)
Ta slovenski standard je istoveten z: EN 161:2011/prA1
ICS:
23.060.20 Zapirni ventili (kroglasti in Ball and plug valves
pipe)
27.060.20 Plinski gorilniki Gas fuel burners
SIST EN 161:2011/oprA1:2011 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 161:2011/oprA1:2011
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SIST EN 161:2011/oprA1:2011
EUROPEAN STANDARD
DRAFT
EN 161:2011
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA1
April 2011
ICS 23.060.10
English Version
Automatic shut-off valves for gas burners and gas appliances -
Special requirements to determine the performance level (PL)
Automatische Absperrventile für Gasbrenner und
Gasgeräte - Besondere Anforderungen zur Bestimmung
des Performance Levels (PL)
This draft amendment is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 58.
This draft amendment A1, if approved, will modify the European Standard EN 161:2011. If this draft becomes an amendment, CEN
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of this amendment
into the relevant national standard without any alteration.
This draft amendment 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland 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
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2011 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 161:2011/prA1:2011: E
worldwide for CEN national Members.
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SIST EN 161:2011/oprA1:2011
EN 161:2011/prA1:2011 (E)
Contents Page
Foreword .3
Annex AA (normative) Method for the determination of Performance Level (PL) .6
AA.1 Scope .6
AA.2 Normative references .6
AA.3 Terms and definitions .6
AA.4 Performance .6
AA.4.1 Operation mode .6
AA.4.2 PL and field data evaluation .6
AA.4.3 Hardware failure tolerance (HFT) .6
AA.4.4 Common cause failure (CCF) .6
AA.4.5 Safe failure fraction (SFF) .7
AA.4.6 Determination of the B va
...