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  • EN ISO 21013-3:2016 (edition 2)

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    Cryogenic vessels - Pressure-relief accessories for cryogenic service - Part 3: Sizing and capacity determination (ISO 21013-3:2016)

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    Language(s): 

    Published date:  08-06-2016

    Publisher:  Comite Europeen de Normalisation

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

    European foreword
    Foreword
    1 Scope
    2 Normative references
    3 Symbols
    4 Calculation of the total quantity of heat transferred
      per unit time from the hot wall (outer jacket) to the
      cold wall (inner vessel)
    5 Calculation of the mass flow to be relieved by pressure
      relief devices
    6 Piping for pressure relief devices
    7 Sizing of pressure relief devices
    Annex A (informative) - Cryostats
    Bibliography
    Annex ZA (informative) - Relationship between this
             European Standard and the Essential
             Requirements of EU Directive (2014/68/UE -
             Pressure Equipment Directive)

    Abstract - (Show below) - (Hide below)

    ISO 21013-3:2016 provides separate calculation methods for determining the required mass flow to be relieved for each of the following specified conditions:- vacuum-insulated vessels with insulation system (outer jacket + insulating material) intact under normal vacuum, outer jacket at ambient temperature, inner vessel at temperature of the contents at the specified relieving pressure;- vacuum-insulated vessels with insulation system (outer jacket + insulating material) intact under normal vacuum, outer jacket at ambient temperature, inner vessel at temperature of the contents at the specified relieving pressure, pressure regulator of the pressure build-up system functioning at full potential;- vacuum or non-vacuum-insulated vessels with insulation system remaining in place, but with loss of vacuum in the case of vacuum-insulated vessels, outer jacket at ambient temperature, inner vessel at temperature of the contents at the specified relieving pressure or vacuum or non-vacuum-insulated vessels with insulation system remaining fully or partially in place, but with loss of vacuum in the case of vacuum-insulated vessels, fire engulfment, inner vessel at temperature of the contents at the specified relieving pressure;- vacuum-insulated vessels containing fluids with saturation temperature below 75 K at 1 bar with insulation system remaining in place, but with loss of vacuum with air or nitrogen in the vacuum space;- vacuum insulated vessels containing fluids with saturation temperature below 75 K at 1 bar with insulation system remaining in place, but with loss of vacuum with air or nitrogen in the vacuum space with fire engulfment;- vessels with insulation system totally lost and fire engulfment.Good engineering practice based on well-established theoretical physical science needs to be adopted to determine the required mass flow where an appropriate calculation method is not provided for an applicable condition.Recommendations for pressure relief devices for cryostats are given in Annex A.

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

    Committee CEN/TC 268
    Development Note Supersedes EN 13648-3. (06/2016)
    Document Type Standard
    Publisher Comite Europeen de Normalisation
    Status Current
    Supersedes

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

    ISO 4126-1:2013 Safety devices for protection against excessive pressure Part 1: Safety valves
    API 520-1 : 2014 SIZING, SELECTION, AND INSTALLATION OF PRESSURE-RELIEVING DEVICES - PART 1: SIZING AND SELECTION
    ISO 4126-10:2010 Safety devices for protection against excessive pressure Part 10: Sizing of safety valves for gas/liquid two-phase flow
    CGA S 1.2 : 2009 PRESSURE RELIEF DEVICE STANDARDS - PART 2: PORTABLE CONTAINERS FOR COMPRESSED GASES
    2014/68/EU : 2014 COR 1 2015 DIRECTIVE 2014/68/EU OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL OF 15 MAY 2014 ON THE HARMONISATION OF THE LAWS OF THE MEMBER STATES RELATING TO THE MAKING AVAILABLE ON THE MARKET OF PRESSURE EQUIPMENT TEXT WITH EEA RELEVANCE
    CGA S 1.3 : 2008 PRESSURE RELIEF DEVICE STANDARDS - PART 3: STATIONARY STORAGE CONTAINERS FOR COMPRESSED GASES
    ISO 4126-6:2014 Safety devices for protection against excessive pressure Part 6: Application, selection and installation of bursting disc safety devices
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