1、December 2016 English price group 19No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 23.020.40; 23.060.40!%U|“259508
2、9www.din.deDIN EN ISO 21013-3Cryogenic vessels Pressurerelief accessories for cryogenic service Part 3: Sizing and capacity determination (ISO 210133:2016);English version EN ISO 210133:2016,English translation of DIN EN ISO 21013-3:2016-12KryoBehlter Druckentlastungseinrichtungen fr den KryoBetrieb
3、 Teil 3: Bestimmung von Gre und Durchfluss (ISO 210133:2016);Englische Fassung EN ISO 210133:2016,Englische bersetzung von DIN EN ISO 21013-3:2016-12Rcipients cryogniques Dispositifs de scurit pour le service cryognique Partie 3: Dtermination de la taille et du volume (ISO 210133:2016);Version angla
4、ise EN ISO 210133:2016,Traduction anglaise de DIN EN ISO 21013-3:2016-12SupersedesDIN EN 136483:200301www.beuth.deDocument comprises 43 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.12.16 DIN EN ISO 21013-3:2016-12 2 A comma
5、is used as the decimal marker. National foreword This document (EN ISO 21013-3:2016) has been prepared by Technical Committee ISO/TC 220 “Cryogenic vessels in collaboration with Technical Committee CEN/TC 268 “Cryogenic vessels and specific hydrogen technologies applications” (Secretariat: AFNOR, Fr
6、ance). The responsible German body involved in its preparation was DIN-Normenausschuss Druckgasanlagen (DIN Standards Committee Pressurized Gas Installations), Working Committee NA 016-00-05 AA Kryo-Behlter. As regards the specifications given in 3, 4.3, 5, 6.1, 7.1, 7.2, 7.2.5, 7.3 and A.2, DIN SPE
7、C 4683, Cryostats for liquefied helium Safety devices for protection against excessive pressure, should also be observed. In addition to the legal units of measurement, this standard also uses the units “gal” (US gallons) and “psi” (pound per square inch). It is important to note that according to t
8、he German law on units in metrology, the use of these units is not permitted in official or business communications within Germany. The indication of these units solely serves to facilitate the communication with those countries where these units are used (import-export business). Conversion: 1 psi
9、= 6 894,757 Pa 1 gal = 3,785 411 784 103m3= 3,785 411 784 l Amendments This standard differs from DIN EN 13648-3:2003-01 as follows: a) ISO 21013-3:2006 and EN 13648-3:2003 have been combined into one standard and adopted as EN ISO 21013-3; b) calculations for ambient air condensation have been incl
10、uded; c) the calculation model has been modified; d) the document has been restructured and harmonized with current rules of presentation. Previous editions DIN EN 13648-3: 2003-01 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 21013-3 June 2016 ICS 23.020.40 Supersedes EN 13648-3:2002Engl
11、ish Version Cryogenic vessels - Pressure-relief accessories for cryogenic service - Part 3: Sizing and capacity determination (ISO 21013-3:2016) Rcipients cryogniques - Dispositifs de scurit pour le service cryognique - Partie 3: Dtermination de la taille et du volume (ISO 21013-3:2016) Kryo-Behlter
12、 - Druckentlastungseinrichtungen fr den Kryo-Betrieb - Teil 3: Bestimmung von Gre und Durchfluss (ISO 21013-3:2016) This European Standard was approved by CEN on 15 April 2016. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this Eu
13、ropean Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versi
14、ons (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria,
15、Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Sw
16、itzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN natio
17、nal Members. Ref. No. EN ISO 21013-3:2016 EForeword . 51 Scope . 62 Normative references 63 Symbols 74 Calculation of the total quantity of heat transferred per unit time from the hot wall (outer jacket) to the cold wall (inner vessel) .114.1 General 114.2 Under conditions other than fire 114.2.1 Va
18、cuum-insulated vessels under normal vacuum .114.2.2 Pressure build-up device .124.2.3 Vacuum-insulated vessels in the case of loss of vacuum and non-vacuum insulated vessels .124.2.4 Supports and piping .144.3 Under fire conditions 144.3.1 Insulation system remains fully or partially in place during
19、 fire conditions 144.3.2 Insulation system does not remain in place during fire conditions .154.4 Air or Nitrogen condensation 154.4.1 General. 154.4.2 Loss of vacuum with air and nitrogen 154.4.3 Fire with loss of vacuum with air or nitrogen .164.5 Heat transfer per unit time (watts) 174.5.1 Genera
20、l. 174.5.2 Normal operation .174.5.3 Pressure build up regulator fully open 174.5.4 Loss of vacuum condition 174.5.5 Fire condition with loss of vacuum, vacuum jacket, and insulation fully or partially in place 184.5.6 Fire condition with loss of vacuum, insulation not in place 184.5.7 Total heat tr
21、ansfer rate 185 Calculation of the mass flow to be relieved by pressure relief devices .185.1 Relieving pressure, P, less than the critical pressure .185.2 Relieving pressure, P, equal to or greater than the critical pressure 195.3 Example 196 Piping for pressure relief devices 206.1 Pressure drop 2
22、06.1.1 General. 206.1.2 Relief valves . 206.1.3 Bursting discs 206.2 Back pressure consideration . 216.3 Heat transfer 217 Sizing of pressure relief devices 227.1 General 227.2 Sizing of pressure relief valves . 227.2.1 Discharge capacity.227.2.2 Determination of critical vs. subcritical flow for ga
23、ses .237.2.3 Critical flow .237.2.4 Subcritical flow .247.2.5 Recommended analysis method 257.2.6 Example 27Contents PageEuropean foreword .4EN ISO 21013-3:2016 (E) DIN EN ISO 21013-3:2016-12 2 7.3.2 Determination of critical vs. subcritical flow for gases .327.3.3 Critical flow .327.3.4 Subcritical
24、 flow .327.3.5 Recommended analysis method 337.3.6 Example 36Annex A (informative) Cryostats 39Bibliography .41Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of EU Directive (2014/68/UE Pressure Equipment Directive) 40 7.3 Sizing of bursting discs .
25、 317.3.1 Discharge capacity.31.EN ISO 21013-3:2016 (E) DIN EN ISO 21013-3:2016-12 3 European foreword This document (EN ISO 21013-3:2016) has been prepared by Technical Committee ISO/TC 220 “Cryogenic vessels” in collaboration with Technical Committee CEN/TC 268 “Cryogenic vessels and specific hydro
26、gen technologies applications” 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 or by endorsement, at the latest by December 2016, and conflicting national standards shall be withdrawn at th
27、e latest by December 2016. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 13648-3:2002. This document has
28、 been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive. For relationship with EU Directive, see informative Annex ZA, which is an integral part of this document. According to the CEN-CENELEC
29、Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Icelan
30、d, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 21013-3:2016 has been approved by CEN as EN ISO 21013-3:2016 without any modifica
31、tion. EN ISO 21013-3:2016 (E) DIN EN ISO 21013-3:2016-12 4 ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committe
32、es. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the Inte
33、rnational Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the dif
34、ferent types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO sha
35、ll not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document i
36、s information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT)
37、 see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 220, Cryogenic vessels.This second edition cancels and replaces the first edition (ISO 21013-3:2006), which has been technically revised.ISO 21013 consists of the following parts, under
38、the general title Cryogenic vessels Pressure-relief accessories for cryogenic service: Part 1: Reclosable pressure-relief valves Part 2: Non-reclosable pressure-relief devices Part 3: Sizing and capacity determination Part 4: Pressure-relief accessories for cryogenic serviceEN ISO 21013-3:2016 (E) D
39、IN EN ISO 21013-3:2016-12 5 1 ScopeThis part of ISO 21013 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 norm
40、al 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 tempe
41、rature 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 jacke
42、t 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 ve
43、ssel 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 co
44、ntaining 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-es
45、tablished 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.2 Normative referencesThere are no normati
46、ve references in this document.EN ISO 21013-3:2016 (E) DIN EN ISO 21013-3:2016-12 6 3 SymbolsA arithmetic mean of inner and outer surface areas of vessel insulating material m2ABactual flow area of a pipe element m2Aetotal outer surface area of pipe network between the outer jacket and location xm2A
47、Fminimum flow area (reference area) in a pipe network m2AFdminimum flow area (reference area) in the pipe network, downstream of relief valvem2AFuminimum flow area (reference area) in the pipe network, upstream of relief valvem2Aitotal outside surface area of inner vessel m2Ajtotal outer surface are
48、a of pipe network between the inner and outer jackets (interspace)m2ALlarger flow area of a pipe element containing two different flow area sizes m2Ancross-sectional area, support, or pipe material m2ARarea ratio, AS/ALASsmaller flow area of a pipe element containing two different flow area sizes m2AVactual flow (orifice) area of a pressure relief v
