EN 13648-1:2008
(Main)Cryogenic vessels - Safety devices for protection against excessive pressure - Part 1: Safety valves for cryogenic service
Cryogenic vessels - Safety devices for protection against excessive pressure - Part 1: Safety valves for cryogenic service
This European Standard specifies the requirements for the design, manufacture and testing of safety valves for cryogenic service, that is to say for operation with cryogenic fluids (as defined in EN 1251-1) below – 10 °C in addition to operation at ambient temperature. It is a requirement of this European Standard that the valves comply with EN ISO 4126 1 or EN ISO 4126-4. In the event of different requirements, the requirements for cryogenic service shall be applied.
NOTE 1 A cryogenic fluid (refrigerated liquefied gas) is a gas which is partially liquid because of its low temperature (including totally evaporated liquids and supercritical fluids).
This European Standard is restricted to valves not exceeding a size of DN 100 for category B. The valves of category A are limited to DN 25 and set pressures up to 40 bars. Both categories are designed to relieve single phase vapours or gases. A valve can be specified, constructed and tested such that it is suitable for use with more than one gas or with mixtures of gases.
NOTE 2 All safety valves covered in this European Standard correspond to category IV of PED (Directive 97/23/EC) and category 3 of TPED (Directive 99/36/EC).
NOTE 3 This European Standard does not provide methods for determining the capacity of relief valve(s) for a particular cryogenic vessel. Such methods are provided in EN 13648 3.
Kryo-Behälter - Sicherheitseinrichtungen gegen Drucküberschreitung - Teil 1: Sicherheitsventile für den Kryo-Betrieb
Diese Europäische Norm legt die Anforderungen an die Konstruktion, Herstellung und Prüfung von Sicherheitsventilen
für den Kryo-Betrieb fest, d. h. für den Betrieb mit tiefkalten Fluiden unter −10 °C (definiert nach
EN 1252-1) in Ergänzung zum Betrieb bei Umgebungstemperatur. Diese Europäische Norm enthält die
Anforderung, dass die Ventile EN ISO 4126-1 oder EN ISO 4126-4 entsprechen. Bestehen unterschiedliche
Anforderungen, gelten die Anforderungen an den Kryo-Betrieb.
ANMERKUNG 1 Ein tiefkaltes Fluid (tiefgekühltes verflüssigtes Gas) ist ein Gas, das wegen seiner niedrigen Temperatur
teilweise flüssig ist (total verdampfte Flüssigkeiten und überkritische Fluide sind einbezogen).
Diese Europäische Norm gilt ausschließlich für Ventile der Kategorie B mit einer Nennweite von höchstens
DN 100. Ventile der Kategorie A sind auf eine Nennweite von DN 25 und Ansprechdrücke bis 40 bar
beschränkt. Beide Ventilkategorien sind für einphasige Gase oder Dämpfe ausgelegt. Ein Ventil kann so
festgelegt, konstruiert und geprüft werden, dass es für eine Anwendung mit verschiedenen Gasen und Gasgemischen
geeignet ist.
ANMERKUNG 2 Alle in dieser Europäischen Norm erfassten Sicherheitsventile entsprechen Kategorie IV der PED
(Richtlinie 97/23/EG) sowie Kategorie 3 der TPED (Richtlinie 99/36/EG).
ANMERKUNG 3 In dieser Europäischen Norm werden keine Verfahren angegeben, nach denen für einen bestimmten
Kryo-Behälter der aus einem oder mehreren Sicherheitsventil(en) austretende Ausflussmassenstrom zu ermitteln ist.
Diese Verfahren sind in EN 13648-3 festgelegt.
Récipients cryogéniques - Dispositifs de protection contre les surpressions - Partie 1: Soupapes de sûreté pour service cryogénique
La présente Norme européenne spécifie les exigences relatives à la conception, à la fabrication et aux essais
des soupapes de sûreté pour service cryogénique, c'est-à-dire destinées à fonctionner avec des fluides
cryogéniques (comme défini dans l’EN 1251-1) à une température inférieure à – 10 °C ainsi qu'à température
ambiante. La présente Norme européenne établit une exigence selon laquelle les soupapes doivent être
conformes à l’EN ISO 4126-1 ou à l’EN ISO 4126-4. En cas d’exigences différentes, les exigences en matière
de service cryogénique s’appliquent.
NOTE 1 Un fluide cryogénique (gaz liquéfié réfrigéré) est un gaz partiellement liquide compte tenu de sa faible
température (y compris les liquides totalement évaporés et les fluides supercritiques).
La présente Norme européenne se limite aux soupapes de diamètre nominal inférieur ou égal à 100 pour la
catégorie B. Les soupapes de catégorie A sont limitées à un diamètre nominal de 25 et des pressions de
tarage pouvant atteindre 40 bars. Les deux catégories sont destinées à décharger des vapeurs ou des gaz en
phase unique. Une soupape peut être conçue, construite et soumise à essai afin d'être apte à être utilisée
avec plusieurs gaz ou avec des mélanges gazeux.
NOTE 2 Toutes les soupapes de sûreté concernées par la présente Norme européenne correspondent à la
catégorie IV de la PED (Directive 97/23/CE) et à la catégorie 3 de la TPED (Directive 99/36/CE).
NOTE 3 La présente Norme européenne ne fournit pas de méthode de détermination de la capacité d'une ou de
plusieurs soupapes de décharge pour un récipient cryogénique donné. De telles méthodes sont fournies dans
l’EN 13648-3.
Kriogene posode - Varnostna oprema proti prekoračitvi tlaka - 1. del: Varnostni ventili za kriogeno področje
General Information
- Status
- Published
- Publication Date
- 18-Nov-2008
- Withdrawal Date
- 30-May-2009
- Technical Committee
- CEN/TC 268 - Cryogenic vessels
- Drafting Committee
- CEN/TC 268/WG 2 - Compatibility, insulation, accessories
- Current Stage
- 9093 - Decision to confirm - Review Enquiry
- Start Date
- 03-Mar-2024
- Completion Date
- 14-Apr-2025
Relations
- Effective Date
- 22-Dec-2008
Overview - EN 13648-1:2008 (Cryogenic vessels - Safety valves for cryogenic service)
EN 13648-1:2008 is the CEN European Standard that specifies requirements for the design, manufacture and testing of safety valves for cryogenic service. It applies to valves intended to operate with cryogenic fluids (as defined in EN 1252-1) at temperatures below −10 °C as well as at ambient temperature. The standard mandates compliance with EN ISO 4126‑1 or EN ISO 4126‑4 and addresses cryogenic-specific design, material and testing considerations for reliable pressure relief.
Key topics and technical requirements
- Scope and limits
- Valves for single‑phase vapours/gases; sizes limited to DN 100 for category B and DN 25 for category A (category A limited to set pressures up to 40 bar).
- All covered valves correspond to PED category IV (Directive 97/23/EC) and TPED category 3 (Directive 99/36/EC).
- Design requirements
- Suitability across specified minimum temperature up to +65 °C.
- Measures to avoid water accumulation, freezing or deposition (drainage, stem guiding).
- Special provisions for sublimating cryogens (e.g., CO2) to avoid solid deposition impairing operation.
- Materials
- Metallic materials must meet toughness requirements in EN 1252‑1 / EN 1252‑2 for the specified minimum temperatures.
- Oxygen compatibility per EN 1797 when required (e.g., oxygen service or temperatures near −190 °C).
- Limits on copper content (e.g., with acetylene mixtures) and guidance for non‑metallic parts (seats/inserts).
- Testing
- Production testing in accordance with EN ISO 4126‑1 / EN ISO 4126‑4 (hydraulic or pneumatic media).
- Type tests specific to cryogenic service (seat leakage, cryogenic performance, repeated lift/reseat cycles).
- Determination of certified derated discharge coefficient (Kdr), cleanliness and marking requirements.
Practical applications
EN 13648-1 is used to ensure safe overpressure protection of cryogenic storage and process equipment:
- Liquid and gaseous cryogenic storage tanks and transportable cryogenic vessels
- LNG/LPG facilities, industrial gas plants, research cryogenic systems
- Installations where vented fluids may freeze or sublimate on valve internals
Who uses this standard
- Pressure‑relief valve manufacturers and designers
- Cryogenic vessel manufacturers and installers
- Safety and compliance engineers, testing laboratories and notified bodies
- Procurement teams specifying valves to meet PED/TPED and CEN requirements
Related standards
- EN ISO 4126‑1 / EN ISO 4126‑4 (safety valves)
- EN 1252‑1, EN 1252‑2 (cryogenic material toughness)
- EN 1797 (gas/material compatibility)
- EN 12300 (cleanliness for cryogenic service)
- EN 13648‑3 (relief capacity, sizing)
- PED 97/23/EC and TPED 99/36/EC (regulatory context)
Keywords: EN 13648-1, cryogenic vessels, safety valves, cryogenic service, pressure relief, PED, EN ISO 4126, valve testing.
Frequently Asked Questions
EN 13648-1:2008 is a standard published by the European Committee for Standardization (CEN). Its full title is "Cryogenic vessels - Safety devices for protection against excessive pressure - Part 1: Safety valves for cryogenic service". This standard covers: This European Standard specifies the requirements for the design, manufacture and testing of safety valves for cryogenic service, that is to say for operation with cryogenic fluids (as defined in EN 1251-1) below – 10 °C in addition to operation at ambient temperature. It is a requirement of this European Standard that the valves comply with EN ISO 4126 1 or EN ISO 4126-4. In the event of different requirements, the requirements for cryogenic service shall be applied. NOTE 1 A cryogenic fluid (refrigerated liquefied gas) is a gas which is partially liquid because of its low temperature (including totally evaporated liquids and supercritical fluids). This European Standard is restricted to valves not exceeding a size of DN 100 for category B. The valves of category A are limited to DN 25 and set pressures up to 40 bars. Both categories are designed to relieve single phase vapours or gases. A valve can be specified, constructed and tested such that it is suitable for use with more than one gas or with mixtures of gases. NOTE 2 All safety valves covered in this European Standard correspond to category IV of PED (Directive 97/23/EC) and category 3 of TPED (Directive 99/36/EC). NOTE 3 This European Standard does not provide methods for determining the capacity of relief valve(s) for a particular cryogenic vessel. Such methods are provided in EN 13648 3.
This European Standard specifies the requirements for the design, manufacture and testing of safety valves for cryogenic service, that is to say for operation with cryogenic fluids (as defined in EN 1251-1) below – 10 °C in addition to operation at ambient temperature. It is a requirement of this European Standard that the valves comply with EN ISO 4126 1 or EN ISO 4126-4. In the event of different requirements, the requirements for cryogenic service shall be applied. NOTE 1 A cryogenic fluid (refrigerated liquefied gas) is a gas which is partially liquid because of its low temperature (including totally evaporated liquids and supercritical fluids). This European Standard is restricted to valves not exceeding a size of DN 100 for category B. The valves of category A are limited to DN 25 and set pressures up to 40 bars. Both categories are designed to relieve single phase vapours or gases. A valve can be specified, constructed and tested such that it is suitable for use with more than one gas or with mixtures of gases. NOTE 2 All safety valves covered in this European Standard correspond to category IV of PED (Directive 97/23/EC) and category 3 of TPED (Directive 99/36/EC). NOTE 3 This European Standard does not provide methods for determining the capacity of relief valve(s) for a particular cryogenic vessel. Such methods are provided in EN 13648 3.
EN 13648-1:2008 is classified under the following ICS (International Classification for Standards) categories: 23.020.40 - Cryogenic vessels; 23.060.40 - Pressure regulators. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 13648-1:2008 has the following relationships with other standards: It is inter standard links to EN 13648-1:2002. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 13648-1:2008 is associated with the following European legislation: EU Directives/Regulations: 2008/68/EC, 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.
You can purchase EN 13648-1:2008 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CEN standards.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kryo Behälter - Sicherheitseinrichtungen gegen Drucküberschreitung - Teil 1: Sicherheitsventile für den Kryo-BetriebRécipients cryogéniques - Dispositifs de protection contre les surpressions - Partie 1: Soupapes de sureté pour service cryogéniqueCryogenic vessels - Safety devices for protection against excessive pressure - Part 1: Safety valves for cryogenic service23.020.40Proti mrazu odporne posode (kriogenske posode)Cryogenic vessels13.240Varstvo pred previsokim tlakomProtection against excessive pressureICS:Ta slovenski standard je istoveten z:EN 13648-1:2008SIST EN 13648-1:2009en,fr,de01-januar-2009SIST EN 13648-1:2009SLOVENSKI
STANDARDSIST EN 13648-1:20021DGRPHãþD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 13648-1November 2008ICS 23.020.40; 23.060.40Supersedes EN 13648-1:2002
English VersionCryogenic vessels - Safety devices for protection againstexcessive pressure - Part 1: Safety valves for cryogenic serviceRécipients cryogéniques - Dispositifs de protection contreles surpressions - Partie 1: Soupapes de sûreté pourservice cryogéniqueKryo-Behälter - Sicherheitseinrichtungen gegenDrucküberschreitung - Teil 1: Sicherheitsventile für denKryo-BetriebThis European Standard was approved by CEN on 5 October 2008.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 CEN 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 CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2008 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13648-1:2008: ESIST EN 13648-1:2009
Standard and the Essential Requirements
of EC Directive 97/23/EC (PED).13 Bibliography.14
EN 12300, Cryogenic vessels – Cleanliness for cryogenic service EN ISO 4126-1:2004, Safety devices for protection against excessive pressure – Part 1: Safety valves (ISO 4126-1:2004) EN ISO 4126-4:2004, Safety devices for protection against excessive pressure – Part 4: Pilot operated safety valves (ISO 4126-4:2004) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 DN (nominal size) alphanumeric designation of size for components of a pipework system, which is used for reference purposes and which comprises the letters DN followed by a dimensionless whole number that is indirectly related to the physical size, in millimetres, of the bore or outside diameter of the end connections [adapted from EN ISO 6708:1995] 3.2 pressure
gauge pressure that is the value which is equal to the algebraic difference between the absolute pressure and the atmospheric pressure SIST EN 13648-1:2009
EXAMPLE A pressure regulating vent valve designed for frequent operation. 3.5 safety valve category B safety valve which would not be expected to relieve during normal operation due to the provision of an alternative relieving or control device 3.6 cryogenic fluid gas which is partially liquid because of its low temperature NOTE
The cryogenic fluids include evaporated liquids and supercritical fluids. The refrigerated but non-toxic gases given in Table 1 and mixtures of them are referred to as cryogenic fluids. SIST EN 13648-1:2009
1913 Neon, refrigerated liquid
1951 Argon, refrigerated liquid
1963 Helium, refrigerated liquid
1970 Krypton, refrigerated liquid
1977 Nitrogen , refrigerated liquid
2187 Carbon dioxide, refrigerated liquid
2591 Xenon, refrigerated liquid
3136 Trifluoromethane, refrigerated liquid
3158 Gas, refrigerated liquid, N.O.S. b 3° O Oxidizing gases
1003 Air, refrigerated liquid
1073 Oxygen, refrigerated liquid
2201 Nitrous oxide, refrigerated liquid, oxidizing
3311 Gas, refrigerated liquid, oxidizing, N.O.S b .
3° F Flammable gases
1038 Ethylene, refrigerated liquid
1961 Ethane, refrigerated liquid
1966 Hydrogen, refrigerated liquid
1972 Methane, refrigerated liquid or natural gas, refrigerated liquid, with high methane content
3138 Ethylene, acetylene and propylene mixture, refrigerated liquid, containing at least 71,5 % ethylene with not more than 22,5 % acetylene and not more than 6 % propylene
3312 Gas, refrigerated liquid, flammable, N.O.S b a
Item and group, identification number, name and description according to the United Nations. b
N.O.S. = not otherwise specified.
3.7
relieving pressure pressure used for the sizing of a safety valve which is greater than or equal to the set pressure plus overpressure
NOTE For set pressure and overpressure definitions see EN ISO 4126-1. 4 Requirements 4.1 General The valve shall satisfy all the requirements of EN ISO 4126-1 or EN ISO 4126-4 except in cases where these Standards include diverging requirements, then this European Standard shall be applied. SIST EN 13648-1:2009
...
SIST EN 13648-1:2009 표준문서는 극저온 서비스를 위한 안전밸브의 설계, 제조 및 시험에 대한 요구사항을 명확히 규정하고 있습니다. 이 표준은 -10 °C 이하의 극저온 유체와 주위 온도에서 작동할 수 있도록 설계된 밸브에 적용됩니다. EN 13648-1:2008 표준에 따르면, 안전밸브는 EN ISO 4126-1 또는 EN ISO 4126-4를 준수해야 하며, 다양한 요구사항이 있을 경우 극저온 서비스에 대한 요구사항이 우선 적용됩니다. 이 표준의 강점 중 하나는 B 카테고리에 해당하는 밸브의 크기가 DN 100을 초과하지 않도록 제한되어 있다는 점입니다. A 카테고리에 속하는 밸브는 DN 25 이하이며, 압력은 최대 40바까지 설정할 수 있습니다. 이는 다양한 가스 또는 가스 혼합물과 함께 사용할 수 있도록 설계된 안전밸브의 안전성과 유용성을 보장합니다. SIST EN 13648-1:2009은 PED 지침(97/23/EC) 내 IV 카테고리 및 TPED 지침(99/36/EC) 내 3 카테고리에 해당하는 모든 안전밸브를 포함하고 있어, 관련 규정에 부합하는 안전성을 강화합니다. 또한, 이 표준은 특정 극저온 용기에 대한 배출밸브의 용량을 결정하는 방법을 제공하지 않지만, 그 방법은 EN 13648-3에서 따로 제시되고 있어 참조할 수 있는 유용한 자원을 제공합니다. 종합적으로, 이 표준은 극저온 유체를 취급하는 산업에서 필수적인 안전성 기준을 제공하며, 안전밸브의 설계와 실행에 있어 매우 중요한 참고 자료로 자리잡고 있습니다.
この標準化文書「EN 13648-1:2008」は、低温液体を使用するための安全弁の設計、製造、および試験に関する要件を具体的に規定しています。この規格は、–10°C以下での運転および周囲温度での運転を対象としており、クリオジェニック流体に特化した重要な役割を果たしています。特に、EN ISO 4126-1およびEN ISO 4126-4に従う必要があり、他の要件がある場合でもクリオジェニックサービスの要件が適用されるという明確な指針があります。 本標準の強みは、DN 100を超えないカテゴリーBの弁と、最大40バールの設定圧力を持つカテゴリーAの弁に絞った規定です。これにより、特定の用途に対する適合性が高まり、クリオジェニック流体の取り扱いにおいて安全性を確保することができます。さらに、単相蒸気またはガスを解放するために設計された弁は、複数のガスやガスの混合物にも対応可能であり、使用範囲が広がります。 また、全ての安全弁はPED指令（97/23/EC）第IVカテゴリーおよびTPED指令（99/36/EC）第3カテゴリーに該当しているため、規制の遵守が求められます。この点においても、本標準は安全性と信頼性の向上に寄与しています。 ただし、特定のクリオジェニック容器の解放弁の容量を決定するための方法は含まれていないことが明記されており、これについては「EN 13648-3」が参照されているため留意が必要です。全体として、EN 13648-1:2008はクリオジェニックサービス向けの安全弁の標準化において、非常に重要で必要不可欠な基準と言えるでしょう。
The EN 13648-1:2008 standard provides a comprehensive framework for the design, manufacture, and testing of safety valves specifically for cryogenic service. Its scope centers on the requirements tailored to ensure the safe operation of valves under extreme conditions, defined as operation with cryogenic fluids below –10 °C as well as at ambient temperatures. This dual operational requirement enhances the versatility and applicability of the safety valves discussed within this standard, thereby broadening the potential use cases within diverse industrial environments. One of the significant strengths of this standard lies in its rigorous stipulations for compliance with established norms such as EN ISO 4126-1 and EN ISO 4126-4. By mandating that valves adhere to these wider safety standards, EN 13648-1 not only enhances the reliability of cryogenic vessel operations but also integrates seamlessly into the existing regulatory frameworks, ensuring a cohesive approach to safety across various applications. Moreover, the standard effectively delineates between categories of valves based on size and operational pressure. It restricts valves within category B to a size of DN 100, while category A valves are limited to DN 25 with set pressures up to 40 bars. This categorization allows for specialized attention to the unique challenges posed by different applications of cryogenic safety valves, facilitating tailored safety solutions for both single-phase vapors and gases. Additionally, the provision for valves to be specified and tested for compatibility with multiple gases or gas mixtures adds significant value, underscoring the standard's relevance in accommodating the complex nature of cryogenic operations. Furthermore, by aligning the safety devices covered within this standard with category IV of the Pressure Equipment Directive (PED) and category 3 of the Transportable Pressure Equipment Directive (TPED), it underscores its importance in meeting compliance and regulatory requirements within the European market. In summary, the EN 13648-1:2008 standard presents a well-structured and robust approach to ensuring safety in cryogenic applications. Its detailed specifications, inclusive scope, and emphasis on compliance with existing safety frameworks highlight its strengths and underscore its relevance in the management of safety risks associated with cryogenic vessels.
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