SIST EN 13371:2002
(Main)Cryogenic vessels - Couplings for cryogenic service
Cryogenic vessels - Couplings for cryogenic service
This European Standard specifies the minimum requirements for the design, manufacture and testing of couplings for cryogenic service to be used for temporary connecting of flexible hoses to cryogenic vessels at the following operating conditions :
- design temperature range from - 270 ° C to + 65 ° C ;
- maximum nominal pressure : 80 bar ;
- nominal size (DN) from 10 to 100.
Permanent connections such as flanges and unions are not covered by this standard.
It is intended that the couplings should be designed, tested and marked for service at one of the generally accepted pressure e.g. PN 40. Couplings can then be selected with a PN equal to or greater than the maximum allowable pressure (PS) of the equipment for which they are to be used.
Kryo-Behälter - Kupplungen für den tiefkalten Betrieb
Diese Norm legt Mindestanforderungen für Auslegung, Herstellung und Prüfung von Kupplungen für den tiefkalten Betrieb fest, die zeitlich begrenzt zur Verbindung von flexiblen Rohren (Schläuchen) unter folgenden Betriebs-bedingungen verwendet werden:
- Auslegungstemperatur: von - 270°C bis + 65 C,
- maximaler Nenndruck :80 bar,
- Nennweite (DN): 10 bis 100.
Ständige Verbindungen wie Flansche und Rohrverbindungsstutzen fallen nicht unter den Anwendungsbereich dieser Norm.
Es ist anzustreben, dass Kupplungen für eine genormte Druckstufe, z. B. PN 40, bemessen, geprüft und gekennzeichnet werden. Die Kupplungen können dann so ausgewählt werden, dass ihr Nenndruck PN gleich oder größer ist als der maximal zulässige Druck (PS) der Einrichtung , in den sie angewendet werden.
Récipients cryogéniques - Raccords pour service cryogénique
La présente Norme européenne spécifie les exigences minimales relatives à la conception, à la fabrication et aux essais des raccords pour service cryogénique utilisés temporairement pour raccorder les flexibles aux récipients cryogéniques dans les conditions suivantes de fonctionnement :
- plage de températures de calcul comprise entre - 270 °C et + 65 °C ;
- pression nominale maximale : 80 bar ;
- diamètre nominal (DN) de 10 à 100.
Les raccords à usage permanent tels que les brides et autres raccords unions ne sont pas couverts par la présente Norme européenne.
Il est recommandé de concevoir, essayer et marquer les raccords pour le service à une pression généralement admise, par exemple PN 40. Ils peuvent alors être associés à des récipients dont la pression maximale admissible (PS) est inférieure ou égale à leur pression nominale.
La présente norme spécifie les exigences minimales relatives à la conception, à la fabrication et aux essais des raccords pour service cryogénique utilisés temporairement pour raccorder les flexibles aux récipients cryogéniques dans les conditions suivantes de fonctionnement: - plage de températures de calcul comprise entre - 270°C et + 65°C; - pression nominale maximale: 80 bars; - diamètre nominal (DN) compris entre 10 et 100. Les raccords à usage permanent tels que les brides et autres raccords unions ne sont pas couverts par la présente norme.
Kriogene posode - Priključni nastavki za obratovanje v kriogenem področju
General Information
- Status
- Published
- Publication Date
- 31-Oct-2002
- Technical Committee
- TLP - Pressure vessels
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Nov-2002
- Due Date
- 01-Nov-2002
- Completion Date
- 01-Nov-2002
Overview
SIST EN 13371:2002 is a European Standard developed by CEN that specifies the minimum requirements for the design, manufacture, and testing of couplings for cryogenic service. This standard applies to couplings used for the temporary connection of flexible hoses to cryogenic vessels, providing guidance for safe and reliable operation under extreme temperature and pressure conditions. It covers couplings operating within a temperature range from -270 °C up to +65 °C, with maximum nominal pressures of 80 bar and nominal sizes (DN) ranging from 10 to 100.
This standard excludes permanent connection types such as flanges and unions. Instead, it focuses on couplings engineered for temporary connections, ensuring they meet stringent safety, quality, and durability criteria suitable for cryogenic applications.
Key Topics
Design and Construction:
Couplings must be operable across the full design temperature range and be robust enough to handle adverse handling scenarios such as drops or hammering. Design requirements also include controlled connect/disconnect forces, leak tightness, and resistance to vibrations. Couplings intended for flammable fluids must be electrically conductive.Materials:
Materials used must be compatible with the vessel piping, hoses, and cryogenic fluids - especially oxygen - and have sufficient toughness at low temperatures. Materials should resist corrosion, stress corrosion, and be suitable per EN 1252 standards for their temperature applications.Testing Requirements:
Prototype coupling samples undergo rigorous testing including:- Hydraulic pressure test at 1.5 times nominal pressure
- Leak tests at ambient and cryogenic temperatures (using nitrogen, air, or helium gases)
- Strength tests up to three times nominal pressure
- Functional cycling tests (up to 500 connect/disconnect cycles) for durability
Cleaning and Marking:
Couplings must conform to EN 12300 cleanliness standards. They should also be clearly and permanently marked with critical information including nominal pressure (PN), fluid type, minimum specified temperature, and the EN standard number.Safety Compliance:
EN 13371 supports compliance with the EU Pressure Equipment Directive (PED 97/23/EC), ensuring couplings meet essential safety and operational requirements mandated by EU regulations.
Applications
EN 13371 couplings are critical components in industries handling cryogenic fluids such as liquid nitrogen, oxygen, argon, and helium. They are widely used for:
- Temporary connections between flexible hoses and cryogenic storage vessels
- Industrial gas supply systems requiring safe and reliable hose coupling solutions
- Transportation of cryogenic fluids in tanker vehicles and transfer lines
- Applications where electrical conductivity and pressure resistance are crucial, especially for flammable cryogenic fluids
- Situations where repeated connection cycles are expected without compromising safety
These couplings enable safe transfer of ultra-cold fluids while withstanding mechanical stresses and preventing leaks, thus ensuring operational safety and environmental protection.
Related Standards
- EN 1252-1 and EN 1252-2: Material toughness requirements for cryogenic temperatures
- EN 1333:1996: Definition and selection of nominal pressure (PN) for pipework components
- EN 1797-1: Compatibility of materials used in cryogenic vessels with gases
- EN 12300: Cleanliness requirements for cryogenic vessels and components
- EN 12434:2000: Cryogenic flexible hoses, closely related to the couplings covered under EN 13371
- EN ISO 6708:1995: Standardizes nominal sizes (DN) for pipework components
By adhering to SIST EN 13371:2002, manufacturers and users of cryogenic vessels are assured of couplings that not only meet high safety and performance standards under extreme temperature conditions but also comply with relevant EU safety directives. This standard is essential for professionals in cryogenic system design, manufacturing, testing, and quality assurance seeking robust, tested coupling solutions for critical cryogenic fluid applications.
Frequently Asked Questions
SIST EN 13371:2002 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Cryogenic vessels - Couplings for cryogenic service". This standard covers: This European Standard specifies the minimum requirements for the design, manufacture and testing of couplings for cryogenic service to be used for temporary connecting of flexible hoses to cryogenic vessels at the following operating conditions : - design temperature range from - 270 ° C to + 65 ° C ; - maximum nominal pressure : 80 bar ; - nominal size (DN) from 10 to 100. Permanent connections such as flanges and unions are not covered by this standard. It is intended that the couplings should be designed, tested and marked for service at one of the generally accepted pressure e.g. PN 40. Couplings can then be selected with a PN equal to or greater than the maximum allowable pressure (PS) of the equipment for which they are to be used.
This European Standard specifies the minimum requirements for the design, manufacture and testing of couplings for cryogenic service to be used for temporary connecting of flexible hoses to cryogenic vessels at the following operating conditions : - design temperature range from - 270 ° C to + 65 ° C ; - maximum nominal pressure : 80 bar ; - nominal size (DN) from 10 to 100. Permanent connections such as flanges and unions are not covered by this standard. It is intended that the couplings should be designed, tested and marked for service at one of the generally accepted pressure e.g. PN 40. Couplings can then be selected with a PN equal to or greater than the maximum allowable pressure (PS) of the equipment for which they are to be used.
SIST EN 13371:2002 is classified under the following ICS (International Classification for Standards) categories: 23.020.40 - Cryogenic vessels; 23.040.70 - Hoses and hose assemblies. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 13371:2002 is associated with the following European legislation: EU Directives/Regulations: 2014/68/EU, 94/55/EC, 96/49/EC, 96/86/EC, 96/87/EC, 97/23/EC; Standardization Mandates: M/071, M/086. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
SIST EN 13371:2002 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Cryogenic vessels - Couplings for cryogenic serviceSRGURþMXRécipients cryogéniques - Raccords pour service cryogéniqueKryo-Behälter - Kupplungen für den tiefkalten BetriebTa slovenski standard je istoveten z:EN 13371:2001SIST EN 13371:2002en23.040.7023.020.40ICS:SLOVENSKI
STANDARDSIST EN 13371:200201-november-2002
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 13371December 2001ICS 23.020.40; 23.040.70English versionCryogenic vessels - Couplings for cryogenic serviceRécipients cryogéniques - Raccords pour servicecryogéniqueKryo-Behälter - Kupplungen für den tiefkalten BetriebThis European Standard was approved by CEN on 11 November 2001.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, 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© 2001 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13371:2001 E
Clauses of this European Standard addressing essential requirements or otherprovisions of EU directives.8Bibliography.9
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