SIST EN 13941-2:2019/oprA1:2021
(Amendment)District heating pipes - Design and installation of thermal insulated bonded single and twin pipe systems for directly buried hot water networks - Part 2: Installation
District heating pipes - Design and installation of thermal insulated bonded single and twin pipe systems for directly buried hot water networks - Part 2: Installation
This European Standard specifies requirements for design, calculation and installation of factory made thermal insulated bonded single and twin pipe systems for directly buried networks for continuous operation with treated hot water at various temperatures up to 120 ºC and occasionally with peak temperatures up to 140 ºC and maximum internal pressure 2,5 MPA. Flexible pipe systems according to EN 15632 are not under the scope of this standard.
The standard EN 13941, Design and installation of thermal insulated bonded single and twin pipe systems for directly buried hot water networks consists of two parts:
a) EN 13941-1: Design;
b) EN 13941-2: Installation.
The requirements and stipulations in this part: prEN 13941-2, form an unbreakable unity with those of prEN 13941-1. This part shall therefore exclusively be used in combination with prEN 13941-1.
The principles of the standard may be applied to thermal insulated pipe systems with pressures higher than 2,5 MPa, provided that special attention is paid to the effects of pressure.
Adjacent pipes, not buried, but belonging to the network (e. g. pipes in ducts, valve chambers, road crossings above ground etc.) may be designed and installed according to this standard.
This standard presupposes the use of treated water, which by softening, demineralisation, de-aeration, adding of chemicals, or otherwise has been treated to effectively prevent internal corrosion and deposits in the pipes.
This standard is not applicable for such units as:
a) pumps;
b) heat exchangers;
c) boilers, tanks;
d) systems behind domestic substations.
Fernwärmerohre - Auslegung und Bauausführung von gedämmten Ein- und Doppelrohr-Verbundsystemen für direkt erdverlegte Fernwärmenetze - Teil 2: Bauausführung
Tuyaux de chauffage urbain - Conception et installation des systèmes bloqués de tuyaux monotubes et bitubes isolés thermiquement pour les réseaux d’eau chaude enterrés directement - Partie 2 : Installation
No scope available
Cevi za daljinsko ogrevanje - Projektiranje in vgradnja toplotno izoliranih spojenih eno- in dvocevnih sistemov za neposredno zakopana vročevodna omrežja - 2. del: Vgradnja - Dopolnilo A1
General Information
Relations
Overview
EN 13941-2:2019/prA1 (CEN) covers the installation of factory-made, thermal insulated bonded single and twin pipe systems for directly buried district heating (hot water) networks. It forms an unbreakable unity with EN 13941-1 (Design) and must be used together with that part. The standard applies to continuously operated treated hot water systems up to 120 °C (occasional peaks to 140 °C) and a maximum internal pressure of 2.5 MPa. Flexible systems per EN 15632 are excluded. Adjacent non-buried network pipes (ducts, valve chambers, road crossings) may also be installed per this standard. Units such as pumps, heat exchangers, boilers, tanks and systems behind domestic substations are outside its scope.
Key topics and technical requirements
- Installation scope: Procedures for directly buried, factory-made bonded single and twin pipe assemblies for district heating.
- Mandatory linkage with design part: Use in combination with EN 13941-1; installation rules complement design requirements.
- Operating limits: Continuous temperatures up to 120 °C, peak up to 140 °C, internal pressure up to 2.5 MPa (principles adaptable to higher pressures with special attention).
- Treated water requirement: Presumes use of chemically/physically treated water to prevent internal corrosion and deposits.
- Welding and jointing:
- Welding procedure specifications (WPS) must follow relevant EN ISO standards (qualification per EN ISO 15610/15613/15614-1 and WPS per EN ISO 15609-1/2).
- Welding procedure qualification records (WPQR) verified using water-filled test pipes.
- Pipe end preparation must follow the project WPS; handling of minor end measurement differences by centring.
- Testing and inspection:
- Pressure tests and visual overpressure inspections (terminology standardized to “overpressure”).
- Guidance on testing chambers and sealing durability at transitions.
- Materials and fusion:
- PE materials with MFR differences ≤ 0.5 g/10 min considered fusible to each other.
- Installation details: Drain/vent assemblies, cable routing, pipe laying in protection tubes, and requirements to avoid damage during insertion and ensure sealing durability.
Applications and users
Practical applications:
- New and rehabilitated directly buried district heating networks, service laterals, and short above-ground transitions.
- Road crossings, valve chambers, ducts and other network elements where factory-made bonded pipe systems are used.
Primary users:
- District heating designers and engineers
- Installation contractors and site supervisors
- Prefabricated pipe manufacturers and quality inspectors
- Utility operators, asset owners, and regulatory authorities
- Consultants preparing specifications and acceptance tests
Related standards
- EN 13941-1 (Design) - essential companion document
- EN 15632 - flexible pipe systems (excluded)
- EN ISO 15609-1 / 15609-2, EN ISO 15610, EN ISO 15613, EN ISO 15614-1 - referenced welding standards
- EN 17248 - terms and definitions (referenced)
Using EN 13941-2:2019/prA1 ensures consistent, safe installation practice for bonded insulated district heating pipes and aligns installation with design, materials, welding and testing requirements for reliable hot-water network operation.
Standards Content (Sample)
SLOVENSKI STANDARD
01-junij-2021
Cevi za daljinsko ogrevanje - Projektiranje in vgradnja toplotno izoliranih spojenih
eno- in dvocevnih sistemov za neposredno zakopana vročevodna omrežja - 2. del:
Vgradnja - Dopolnilo A1
District heating pipes - Design and installation of thermal insulated bonded single and
twin pipe systems for directly buried hot water networks - Part 2: Installation
Fernwärmerohre - Auslegung und Bauausführung von gedämmten Ein- und Doppelrohr-
Verbundsystemen für direkt erdverlegte Fernwärmenetze - Teil 2: Bauausführung
Tuyaux de chauffage urbain - Conception et installation des systèmes bloqués de tuyaux
monotubes et bitubes isolés thermiquement pour les réseaux d’eau chaude enterrés
directement - Partie 2 : Installation
Ta slovenski standard je istoveten z: EN 13941-2:2019/prA1
ICS:
23.040.07 Cevovodi za daljinsko Pipeline and its parts for
ogrevanje in njihovi deli district heat
91.140.10 Sistemi centralnega Central heating systems
ogrevanja
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
EUROPEAN STANDARD
EN 13941-2:2019
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA1
April 2021
ICS 23.040.07; 23.040.10; 91.140.10
English Version
District heating pipes - Design and installation of thermal
insulated bonded single and twin pipe systems for directly
buried hot water networks - Part 2: Installation
Tuyaux de chauffage urbain - Conception et installation Fernwärmerohre - Auslegung und Bauausführung von
des systèmes bloqués de tuyaux monotubes et bitubes gedämmten Ein- und Doppelrohr-Verbundsystemen
isolés thermiquement pour les réseaux d'eau chaude für direkt erdverlegte Fernwärmenetze - Teil 2:
enterrés directement - Partie 2 : Installation Bauausführung
This draft amendment is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 107.
This draft amendment A1, if approved, will modify the European Standard EN 13941-2:2019. If this draft becomes an
amendment, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for
inclusion of this amendment into the relevant national standard without any alteration.
This draft amendment was established by CEN in three official versions (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, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13941-2:2019/prA1:2021 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
1 Modifications to Clause 2 "Normative references" . 4
2 Modifications to subclause 11.3.1.3 "Welding procedures and the welding process" . 4
3 Modifications to subclause 11.3.1.6.1 "Joint edge preparation and different wall
thickness" . 4
4 Modification to "Figure 4" . 5
5 Modifications to subclause 11.5.2 "Visual test with over pressure by air" . 5
6 Modification to subclause 11.5.4.1 "General" . 5
7 Modification to subclause 11.6.1 "General" . 5
8 Modifications to subclause 11.6.2 "Joints" . 5
9 Modification to subclause 11.9 "Electrical and telecommunication cable of the
systems" . 6
10 Modification to subclause 11.11.3 "Pipe laying in protection tubes" . 6
11 Modification to Figure 14 . 6
European foreword
This document (EN 13941-2:2019/prA1:2021) has been prepared by Technical Committee CEN/TC 107
“Prefabricated district heating and district cooling pipe systems”, the secretariat of which is held by DS.
This document is currently submitted to the CEN Enquiry.
EN 13941, District heating pipes — Design and installati
...
Frequently Asked Questions
SIST EN 13941-2:2019/oprA1:2021 is a draft published by the Slovenian Institute for Standardization (SIST). Its full title is "District heating pipes - Design and installation of thermal insulated bonded single and twin pipe systems for directly buried hot water networks - Part 2: Installation". This standard covers: This European Standard specifies requirements for design, calculation and installation of factory made thermal insulated bonded single and twin pipe systems for directly buried networks for continuous operation with treated hot water at various temperatures up to 120 ºC and occasionally with peak temperatures up to 140 ºC and maximum internal pressure 2,5 MPA. Flexible pipe systems according to EN 15632 are not under the scope of this standard. The standard EN 13941, Design and installation of thermal insulated bonded single and twin pipe systems for directly buried hot water networks consists of two parts: a) EN 13941-1: Design; b) EN 13941-2: Installation. The requirements and stipulations in this part: prEN 13941-2, form an unbreakable unity with those of prEN 13941-1. This part shall therefore exclusively be used in combination with prEN 13941-1. The principles of the standard may be applied to thermal insulated pipe systems with pressures higher than 2,5 MPa, provided that special attention is paid to the effects of pressure. Adjacent pipes, not buried, but belonging to the network (e. g. pipes in ducts, valve chambers, road crossings above ground etc.) may be designed and installed according to this standard. This standard presupposes the use of treated water, which by softening, demineralisation, de-aeration, adding of chemicals, or otherwise has been treated to effectively prevent internal corrosion and deposits in the pipes. This standard is not applicable for such units as: a) pumps; b) heat exchangers; c) boilers, tanks; d) systems behind domestic substations.
This European Standard specifies requirements for design, calculation and installation of factory made thermal insulated bonded single and twin pipe systems for directly buried networks for continuous operation with treated hot water at various temperatures up to 120 ºC and occasionally with peak temperatures up to 140 ºC and maximum internal pressure 2,5 MPA. Flexible pipe systems according to EN 15632 are not under the scope of this standard. The standard EN 13941, Design and installation of thermal insulated bonded single and twin pipe systems for directly buried hot water networks consists of two parts: a) EN 13941-1: Design; b) EN 13941-2: Installation. The requirements and stipulations in this part: prEN 13941-2, form an unbreakable unity with those of prEN 13941-1. This part shall therefore exclusively be used in combination with prEN 13941-1. The principles of the standard may be applied to thermal insulated pipe systems with pressures higher than 2,5 MPa, provided that special attention is paid to the effects of pressure. Adjacent pipes, not buried, but belonging to the network (e. g. pipes in ducts, valve chambers, road crossings above ground etc.) may be designed and installed according to this standard. This standard presupposes the use of treated water, which by softening, demineralisation, de-aeration, adding of chemicals, or otherwise has been treated to effectively prevent internal corrosion and deposits in the pipes. This standard is not applicable for such units as: a) pumps; b) heat exchangers; c) boilers, tanks; d) systems behind domestic substations.
SIST EN 13941-2:2019/oprA1:2021 is classified under the following ICS (International Classification for Standards) categories: 23.040.07 - Pipeline and its parts for district heat; 23.040.10 - Iron and steel pipes; 91.140.10 - Central heating systems. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 13941-2:2019/oprA1:2021 has the following relationships with other standards: It is inter standard links to SIST EN 13941-2:2019+A1:2022, SIST EN 13941-2:2019. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
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La norme SIST EN 13941-2:2019/oprA1:2021 se concentre sur la conception et l'installation de systèmes de tuyauterie isolée à simple et double canal, destinés à être enterrés, pour les réseaux d'eau chaude. Ce document normatif établit des exigences précises concernant la conception, le calcul et l'installation de systèmes de tuyauterie préfabriqués, afin d'assurer une opération continue avec de l'eau chaude traitée à des températures pouvant atteindre 120 ºC, avec des pointes de température occasionnelles jusqu'à 140 ºC et une pression interne maximale de 2,5 MPa. Un des principaux atouts de cette norme est sa capacité à fournir des directives claires et détaillées pour l'installation de systèmes de tuyauterie. Ceci est essentiel pour garantir la sécurité et l'efficacité des réseaux de chauffage urbain. La précision des exigences facilite également la conformité, réduisant ainsi les risques d'erreurs au cours de la mise en œuvre des projets. De plus, les spécifications concernant l'utilisation de l'eau traitée pour prévenir la corrosion interne et les dépôts dans les tuyaux renforcent la durabilité des installations. La norme reconnaît également l'importance de l'intégration avec la première partie, EN 13941-1, qui détaillent la conception. Cette approche intégrée paraît incontournable puisque les exigences de l'installation ne peuvent être considérées qu'en conjonction avec celles du design. En outre, la possibilité d'adapter les principes de la norme pour des systèmes avec une pression supérieure à 2,5 MPa, tout en portant une attention particulière aux effets de la pression, témoigne de la flexibilité et de la robustesse des lignes directrices proposées. Cependant, il est important de noter que cette norme ne couvre pas tous les éléments d'un système de chauffage urbain, notamment les pompes, les échangeurs de chaleur ou les chaudières, ce qui limite son champ d'application. Néanmoins, la clarté des exigences de conception et d'installation pour les tuyauteries enterrées représente un avantage précieux pour les ingénieurs et les installateurs. En somme, la norme SIST EN 13941-2:2019/oprA1:2021 se révèle être essentielle pour le développement de systèmes de chauffage efficaces et durables, garantissant une installation sûre et conforme aux exigences techniques établies. Ses strengths résident dans son approche systématique et intégrée, son attention portée à la durabilité grâce à l'utilisation d'eau traitée, et sa capacité à s'adapter à des situations spécifiques tout en établissant un cadre normatif rigoureux.
SIST EN 13941-2:2019/oprA1:2021 표준은 직접 매립된 온수 네트워크용으로 설계된 열 절연 결합 단일 및 쌍둥이 파이프 시스템의 설치에 대한 요구 사항을 명확히 규정하고 있습니다. 이 유럽 표준은 120 ºC까지의 다양한 온도에서 처리된 온수의 연속 운전을 위해, 최대 내부 압력 2.5 MPa까지의 시스템에 적용됩니다. 특히, 이 표준의 강점은 직접 매립된 네트워크의 설계 및 설치를 위한 상세한 지침을 제공한다는 것입니다. 이 표준은 EN 13941의 두 부분 중 하나로, 설치에 관한 요구 사항과 규정이 EN 13941-1의 설계 요구 사항과 밀접하게 결합되어 사용되어야 함을 강조합니다. 이러한 통합성은 사용자가 필수적으로 두 문서를 함께 고려해야 함을 알립니다. 더불어, 이 표준은 2.5 MPa 이상의 압력을 지닌 열 절연 파이프 시스템에도 적용 가능하나, 압력 효과에 대한 특별한 주의가 필요하다는 조건을 제공합니다. SIST EN 13941-2는 매립되지 않은 인접 파이프 시스템에도 적용될 수 있어, 도로 위의 밸브실, 덕트 내의 파이프 등 다양한 환경에서의 적용성을 더욱 높이고 있습니다. 또한, 사용되는 물은 부식 및 침전물 생성을 효과적으로 방지하기 위해 적절한 처리를 행한 온수여야 하며, 이는 파이프의 지속 가능성을 보장하는 측면에서도 중요한 요소입니다. 이 표준은 펌프, 열교환기, 보일러, 탱크 등과 같은 특정 장치에는 적용되지 않음을 분명히 하고 있어, 사용자로 하여금 적합한 기준을 명확히 이해하는 데 도움을 줍니다. 따라서 SIST EN 13941-2:2019/oprA1:2021는 직접 매립된 열수 네트워크의 설계와 설치에 있어 매우 중요한 기준으로 자리 잡고 있으며, 현장에서의 일관성과 안전성을 보장하는 데 기여합니다.
The SIST EN 13941-2:2019/oprA1:2021 standard is an essential guideline for the design and installation of thermal insulated bonded single and twin pipe systems specifically tailored for directly buried hot water networks. This standard intricately details the requirements necessary for the continuous operation of these systems, accommodating treated hot water at temperatures reaching up to 120 ºC and allowing for occasional peak temperatures of 140 ºC, with a maximum internal pressure of 2.5 MPa. One of the strengths of this standard lies in its comprehensive scope, which not only covers the installation procedures but also mandates a concurrent understanding of the design principles outlined in prEN 13941-1. This interrelated approach ensures that users apply a unified methodology, enhancing the effectiveness and safety of the networks constructed using these thermal insulated systems. The standard is especially relevant for professionals involved in the development and maintenance of district heating systems, as it empowers them with clear directives on how to effectively install pipes in underground networks. Furthermore, the guidelines on the treatment of water used in these systems highlight the importance of mitigating internal corrosion and deposits, which can significantly affect longevity and efficiency. Additionally, while this standard provides a robust framework for high-pressure systems-beyond the specified maximum of 2.5 MPa-it also emphasizes the need for heightened attention to pressure effects, which is crucial for ensuring system integrity under varying operational conditions. Notably, the installation practices outlined can also extend to adjacent pipe systems that are not buried, indicating a versatile application that supports comprehensive network configurations. However, it is crucial to note the exclusions specified in the standard, which ensures that users are aware of the limitations regarding items such as pumps and heat exchangers that fall outside its purview. In summary, SIST EN 13941-2:2019/oprA1:2021 serves as a critical resource for industry professionals by providing stringent guidelines that prioritize safety, efficiency, and durability in the installation of thermal insulated bonded pipe systems for hot water networks. Its relevance in the sector cannot be overstated, particularly as the demand for sustainable and reliable district heating solutions continues to grow.
Die Norm SIST EN 13941-2:2019/oprA1:2021 befasst sich mit dem Design und der Installation von wärmeisolierten, verklebten Einzel- und Doppelrohrsystemen für direkt verlegte Warmwassernetzwerke. Besonders hervorzuheben ist der klare Anwendungsbereich dieser Norm, die spezifische Anforderungen für die Planung, Berechnung und Installation solcher Systeme festlegt. Die Norm gilt für den dauerhaften Betrieb mit behandeltem Warmwasser bei verschiedenen Temperaturen bis zu 120 ºC und gelegentlich bei Spitzenwerten bis zu 140 ºC. Dies ist besonders wichtig für die Planung von Wärmeversorgungsanlagen, da die Norm eine zuverlässige Grundlage bietet, um die thermische Effizienz und die Langlebigkeit der Rohrsysteme zu maximieren. Ein starkes Merkmal der Norm ist ihre enge Integration mit der vorangegangenen Norm EN 13941-1, die das Design behandelt. Die Anforderungen und Bestimmungen wirken zusammen und es wird klargestellt, dass die Anwendung von prEN 13941-2 nur in Verbindung mit prEN 13941-1 erfolgen soll, was eine kohärente Vorgehensweise in der Planung und Installation sicherstellt. Dies fördert ein ganzheitliches Verständnis für das System und stärkt die Qualität der Arbeiten, da beide Normteile in einem einheitlichen Kontext betrachtet werden. Des Weiteren ermöglicht die Norm die Anwendung ihrer Prinzipien auch für wärmeisolierte Rohrsysteme mit Druckwerten über 2,5 MPa, wobei besondere Aufmerksamkeit auf die Druckwirkungen gelegt werden muss. Diese Flexibilität erweitert den Anwendungsbereich der Norm und gewährleistet die Anpassungsfähigkeit an verschiedene technische Anforderungen. Die Berücksichtigung von behandeltem Wasser ist ein weiterer zentraler Aspekt dieser Norm. Die Vorschrift, dass das Wasser durch Enthärtung, Demineralisierung, Entgasung oder chemische Zusätze behandelt werden muss, um interne Korrosion und Ablagerungen in den Rohren zu verhindern, ist besonders relevant für die langfristige Nutzung der Systeme. Es ist jedoch zu beachten, dass die Norm für bestimmte Geräte wie Pumpen, Wärmeübertrager, Kessel und Tanks nicht anwendbar ist. Dies grenzt den Anwendungsbereich klar ein und stellt sicher, dass die Norm gezielt auf die spezifischen Anforderungen für Rohrsysteme fokussiert bleibt. Insgesamt bietet die SIST EN 13941-2:2019/oprA1:2021 eine wertvolle und umfassende Grundlage für Fachleute, die mit der Planung und Installation von direkt verlegten Warmwassernetzen arbeiten. Ihre spezifischen Anforderungen, die enge Verbindung zur Norm EN 13941-1 sowie die Berücksichtigung von behandeltem Wasser machen sie zu einem wichtigen Instrument in der Branche.
SIST EN 13941-2:2019/oprA1:2021は、熱絶縁された接着単一および双管システムの設計と設置に関する重要な欧州標準であり、特に直接埋設された温水ネットワークにおける適用に焦点を当てています。この標準の範囲は、120 ºCまでの処理された温水を用いたネットワークの持続的な運用に必要な設計、計算、およびインストールに関する要求事項を明確に定義しています。最大内部圧力は2.5 MPaであり、特に140 ºCまでのピーク温度にも対応可能である点が特徴です。 この標準の強みは、設計(EN 13941-1)と設置(EN 13941-2)の二つの部分から成り立っていることにあります。これにより、一貫した技術的基盤が提供され、設計と設置の各段階で要求される仕様を適切に統合できます。また、EN 13941-2は、プレスurized(圧力に関連した)パイプシステムにも応用可能であり、特別な注意を払えば、2.5 MPaを超える圧力のシステムにも適用できる可能性を秘めています。つまり、この規格は非常に柔軟に使用でき、さまざまな条件下でも安心して運用できるという強みを持っています。 さらに、標準は処理された水の使用を前提としており、内部腐食や管内堆積物の効果的な防止に対する指針が提供されています。これによって、長期的なパイプの耐久性が確保されるため、コスト削減やメンテナンスの効率化にも寄与します。加えて、道路交差などの非埋設管に対しても設計と設置のガイドラインが適用可能であり、実際のネットワーク構成においても広範囲に対応できるようになっています。 SIST EN 13941-2:2019/oprA1:2021は、ポンプ、熱交換器、ボイラー、タンクなどのユニットには適用されないため、特定の用途に特化していることが明確であり、これにより関係者が必要な基準を理解しやすくなっています。この標準は、安全かつ効率的な埋設温水ネットワークの設計と施工を可能にするための強力な基盤となるもので、業界での重要なリファレンスとしての役割を果たしています。








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