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  • PREN 12952-11 : DRAFT 99

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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    WATER-TUBE BOILERS AND AUXILIARY INSTALLATIONS - REQUIREMENTS FOR LIMITING DEVICES AND SAFETY CIRCUITS OF THE BOILER AND ACCESSORIES

    Available format(s): 

    Superseded date:  01-07-2007

    Language(s): 

    Published date:  13-01-2013

    Publisher:  Comite Europeen de Normalisation

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    Table of Contents - (Show below) - (Hide below)

    Foreword
    1 Scope
    2 Normative references
    3 Definitions
      3.1 Limiter
      3.2 Fail-Safe
      3.3 Self-Monitoring
      3.4 Redundancy
      3.5 Diversity
    4 Requirements for limiters
      4.1 General
      4.2 Materials and design
      4.3 Electrical equipment
      4.4 Fault assessment
    5 Special requirements for water limiters
      5.1 Components
      5.2 Design
      5.3 Floating devices
      5.4 Level electrode devices
      5.5 Examination of functional capability
      5.6 Fault Detection
    6 Special requirements for pressure limiters
      6.1 Components
      6.2 Additional requirements regarding 4.4 "Fault
          assessment"
      6.3 Design
      6.4 Electrical equipment
      6.5 Examination of functional capability
      6.6 Fault detection
    7 Special requirements for temperature limiters
      7.1 Components
      7.2 Design
      7.3 Electrical equipment
      7.4 Examination of functional capability
    Annex A (informative) Limiting safety devices
    Annex B (informative) EC-Type examination plan
    Annex C (informative) Marking of limiters
    Annex ZA (informative) Clauses of this European
             Standard addressing essential or other
             provisions of the Pressure Equipment
             Directive

    Abstract - (Show below) - (Hide below)

    Provides requirements for limiting devices, and safety circuits of water-tube boilers as defined in EN 12952-1.

    General Product Information - (Show below) - (Hide below)

    Comment Closes On
    Committee TC 269
    Document Type Draft
    Publisher Comite Europeen de Normalisation
    Status Superseded
    Superseded By

    Standards Referencing This Book - (Show below) - (Hide below)

    PREN 50156-1 : DRAFT 2012 ELECTRICAL EQUIPMENT FOR FURNACES AND ANCILLARY EQUIPMENT - PART 1: REQUIREMENTS FOR APPLICATION DESIGN AND INSTALLATION
    IEC 61082-1:2014 RLV Preparation of documents used in electrotechnology - Part 1: Rules
    EN 60742 : 1995 ISOLATING TRANSFORMERS AND SAFETY ISOLATING TRANSFORMERS - REQUIREMENTS
    IEC 60770:1984 Methods of evaluating the performance of transmitters for use in industrial-process control systems
    IEC 60529:1989+AMD1:1999+AMD2:2013 CSV Degrees of protection provided by enclosures (IP Code)
    EN 60529:1991/AC:2016-12 DEGREES OF PROTECTION PROVIDED BY ENCLOSURES (IP CODE) (IEC 60529 EDITION 2.2 CORRIGENDUM 2:2015)
    IEC 60664-1:2007 Insulation coordination for equipment within low-voltage systems - Part 1: Principles, requirements and tests
    EN 60730-1:2016 AUTOMATIC ELECTRICAL CONTROLS - PART 1: GENERAL REQUIREMENTS (IEC 60730-1:2013, MODIFIED + COR1:2014)
    1997/23/EC : 1997 DIRECTIVE 97/23/EC OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL OF 29 MAY 1997 ON THE APPROXIMATION OF THE LAWS OF THE MEMBER STATES CONCERNING PRESSURE EQUIPMENT
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