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    I.S. EN ISO 4126-4:2013

    Current The latest, up-to-date edition.

    SAFETY DEVICES FOR PROTECTION AGAINST EXCESSIVE PRESSURE - PART 4: PILOT-OPERATED SAFETY VALVES (ISO 4126-4:2013)

    Available format(s):  Hardcopy, PDF

    Language(s):  English

    Published date:  01-01-2013

    Publisher:  National Standards Authority of Ireland

    For Harmonized Standards, check the EU site to confirm that the Standard is cited in the Official Journal.
    Only cited Standards give presumption of conformance to New Approach Directives/Regulations.

    Dates of withdrawal of national standards are available from NSAI.

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

    Foreword
    1 Scope
    2 Normative references
    3 Terms and definitions
    4 Symbols and units
    5 Design
    6 Production testing
    7 Type testing
    8 Determination of pilot operated safety valve performance
    9 Sizing of pilot operated safety valves
    10 Marking and sealing
    Bibliography
    Annex ZA (informative) - Relationship between this International
             Standard and the Essential Requirements of EU Directive
             97/23/EC (PED)

    Abstract - (Show below) - (Hide below)

    Defines general requirements for pilot operated safety valves, irrespective of the fluid for which they are designed.

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

    Document Type Standard
    Publisher National Standards Authority of Ireland
    Status Current
    Supersedes

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

    ISO 4126-7:2013 Safety devices for protection against excessive pressure — Part 7: Common data
    ISO 6708:1995 Pipework components Definition and selection of DN (nominal size)
    API 527 : 2014 SEAT TIGHTNESS OF PRESSURE RELIEF VALVES
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