SIST EN 13648-3:2003
(Main)Cryogenic vessels - Safety devices for protection against excessive pressure - Part 3: Determination of required discharge - Capacity and sizing
Cryogenic vessels - Safety devices for protection against excessive pressure - Part 3: Determination of required discharge - Capacity and sizing
This standard provides a separate calculation method for determining the contributing mass flow to be relieved resulting from 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 relieving pressure;
- vacuum insulated vessels with insulation system remaining in place but with loss of vacuum, or non vacuum insulated vessels with insulation system intact. Outer jacket at ambient temperature. Inner vessel at temperature of the contents at the relieving pressure;
- 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, and fire engulfment. Inner vessel at temperature of the contents at the relieving pressure;
- vessels with insulation system totally lost and fire engulfment.
Good engineering practice based on well established theoretical physical science shall be adopted to determine the contributing mass flow where an appropriate calculation method is not provided for an applicable condition.
Kryo-Behälter - Sicherheitseinrichtungen gegen Drucküberschreitung - Teil 3: Ermittlung des erforderlichen Ausflusses - Ausflussmassenstrom und Auslegung
Récipients cryogéniques - Dispositifs de protection contre les surpressions - Partie 3: Détermination du débit a évacuer - Capacité et dimensionnement
Kriogene posode - Varnostna oprema proti prekoračitvi tlaka - 3. del: Določanje potrebne izpustne količine - Količina izpusta in načrtovanje
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kryo-Behälter - Sicherheitseinrichtungen gegen Drucküberschreitung - Teil 3: Ermittlung des erforderlichen Ausflusses - Ausflussmassenstrom und AuslegungRécipients cryogéniques - Dispositifs de protection contre les surpressions - Partie 3: Détermination du débit a évacuer - Capacité et dimensionnementCryogenic vessels - Safety devices for protection against excessive pressure - Part 3: Determination of required discharge - Capacity and sizing23.020.40Proti mrazu odporne posode (kriogenske posode)Cryogenic vessels13.240Varstvo pred previsokim tlakomProtection against excessive pressureICS:Ta slovenski standard je istoveten z:EN 13648-3:2002SIST EN 13648-3:2003en01-december-2003SIST EN 13648-3:2003SLOVENSKI
STANDARD
SIST EN 13648-3:2003
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 13648-3October 2002ICS 23.020.40English versionCryogenic vessels - Safety devices for protection againstexcessive pressure - Part 3: Determination of required discharge- Capacity and sizingRécipients cryogéniques - Dispositifs de protection contreles surpressions - Partie 3: Détermination du débit àévacuer - Capacité et dimensionnementKryo-Behälter - Sicherheitseinrichtungen gegenDrucküberschreitung - Teil 3: Ermittlung des erforderlichenAusflusses - Ausflussmassenstrom und AuslegungThis European Standard was approved by CEN on 19 August 2002.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2002 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13648-3:2002 ESIST EN 13648-3:2003
EN 13648-3:2002 (E)2ContentsPageForeword.31Scope.52Normative references.53Calculation of the total quantity of heat transferred per unit time from the hot wall (outer jacket) tothe cold wall (inner vessel).53.1General.53.2For conditions other than fire.63.3Under fire conditions.74Calculation of the mass flow Qm (kg h-1) to be relieved by the safety devices.85Rule for the safety devices installation.96Sizing of safety devices.96.1Safety valves.96.2Bursting disc.96.3Sizing of safety valves and bursting discs.9Annex ZA (informative)
Clauses of this European Standard addressing essential requirements or otherprovisions of EU Directives.10Bibliography.11SIST EN 13648-3:2003
EN 13648-3:2002 (E)3ForewordThis document (EN 13648-3:2002) has been prepared by Technical Committee CEN/TC 268 "Cryogenic vessels",the secretariat of which is held by AFNOR.This European Standard shall be given the status of a national standard, either by publication of an identical text orby endorsement, at the latest by April 2003, and conflicting national standards shall be withdrawn at the latest byApril 2003.This document has been prepared under a mandate given to CEN by the European Commission and the EuropeanFree Trade Association, and supports essential requirements of EU Directive(s).For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this document.EN 13648 consists of the following parts:EN 13648-1, Cryogenic vessels - Safety devices for protection against excessive pressure - Part 1: Safety valvesfor cryogenic service.EN 13648-2, Cryogenic vessels - Safety devices for protection against excessive pressure - Part 2: Bursting discssafety devices for cryogenic service.EN 13648-3, Cryogenic vessels - Safety devices for protection against excessive pressure - Part 3: Determinationof required discharge - Capacity and sizing.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain,Sweden, Switzerland and the United Kingdom.SIST EN 13648-3:2003
EN 13648-3:2002 (E)4IntroductionThe capacity of each of the pressure relief devices is established by considering all of the probable conditionscontributing to internal excess pressure. The applicable conditions are specified in the product standard of eachtype of cryogenic vessel.This European Standard provides a separate calculation method for determining the contributing mass flow to berelieved for each of the specified conditions. Conformity of the pressure protection system with the requirement foreach condition is assumed if the applicable method of this standard is adopted.This European Standard is based on CGA pamphlet, S-1.2 and S-1.3 and standards prepared by CEN/TC 69.SIST EN 13648-3:2003
EN 13648-3:2002 (E)51 ScopeThis standard provides a separate calculation method for determining the contributing mass flow to be relievedresulting from each of the following specified conditions: vacuum insulated vessels with insulation system (outer jacket + insulating material) intact under normalvacuum. Outer jacket at ambient temperature. Inner vessel at temperature of the contents at the relievingpressure; vacuum insulated vessels with insulation system remaining in place but with loss of vacuum, or non vacuuminsulated vessels with insulation system intact. Outer jacket at ambient temperature. Inner vessel attemperature of the contents at the relieving pressure; vacuum or non vacuum insulated vessels with insulation system remaining fully or partially in place, but withloss of vacuum in the case of vacuum insulated vessels, and fire engulfment. Inner vessel at temperature ofthe contents at the relieving pressure; vessels with insulation system totally lost and fire engulfment.Good engineering practice based on well established theoretical physical science shall be adopted to determinethe contributing mass flow where an appropriate calculation method is not provided for an applicable condition.2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text, and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies (including amendments).prEN ISO 4126-1, Safety devices for protection against excessive pressure - Part 1: Safety valves (identical to ISO
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