• NS EN 12953-9 : 1ED 2007

    Current The latest, up-to-date edition.

    SHELL BOILERS - PART 9: REQUIREMENTS FOR LIMITING DEVICES OF THE BOILER AND ACCESSORIES

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    Language(s): 

    Published date:  12-01-2013

    Publisher:  Norwegian Standards (Norges Standardiseringsforbund)

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

    Foreword
    1 Scope
    2 Normative references
    3 Terms and definitions
    4 Requirements for limiter
      4.1 General
      4.2 Materials and design
      4.3 Electrical equipment
      4.4 Fault assessment
      4.5 Marking
    5 Special requirements for water level 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 fault assessment requirements
      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
    8 Special requirements for flow limiters
      8.1 Components
      8.2 Design
      8.3 Electrical equipment
      8.4 Examination of functional capability
    Annex A (informative) Limiting device
    Annex B (informative) Example of an examination plan
    Annex C (informative) Marking of limiters
    Annex D (normative) Immunity against electrical and electromagnetic
            influences - Requirements and testing
          D.1 General
          D.2 Immunity against mains voltage variations
          D.3 Immunity against short-time voltage interruptions and
               reductions
          D.4 Immunity against mains frequency changes
          D.5 Immunity against electrostatic discharge (ESD)
          D.6 Immunity against fast transient disturbance variables
               (burst)
          D.7 Immunity against surges
          D.8 Immunity against high-frequency electromagnetic fields
          D.9 Immunity against conducted disturbances induced by
               high frequency fields
          D.10 Immunity against power frequency magnetic fields
    Annex ZA (informative) Relationship between this European
             Standard and the Essential Requirements of EU
             Directive 97/23/EC
    Bibliography

    Abstract - (Show below) - (Hide below)

    Describes requirements for limiters (or limiting devices) which are incorporated into safety systems for shell boilers as defined in EN 12953-1.

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

    Document Type Standard
    Publisher Norwegian Standards (Norges Standardiseringsforbund)
    Status Current
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