EN 13941:2009/FprA1
(Amendment)Design and installation of preinsulated bonded pipe systems for district heating
Design and installation of preinsulated bonded pipe systems for district heating
This European Standard specifies rules for design, calculation and installation for preinsulated bonded pipe systems for buried hot water distribution and transmission networks (cf. figure 2) with pipe assemblies in accordance with EN 253, for continuous operation with hot water at various temperatures up to 120ºC and occasionally with peak temperatures up to 140ºC and maximum internal pressure 25 bar (overpressure).
Application rule:
For larger pipe dimensions and pressures below 25 bar wall thickness bigger than specified in EN 253 can be required for straight pipes, bends and tees.
The principles of the standard can be applied to preinsulated pipe systems with pressures higher than 25 bar, provided that special attention is paid to the effects of pressure. Adjacent pipes belonging to the network (e.g. pipes in ducts, valve chambers, road crossings above ground etc.) can be designed and installed according to this standard.
The standard assumes use of treated water, which by softening, demineralisation, deaeration, adding of chemicals, or otherwise has been treated to prevent internal corrosion and deposits in the pipes.
This standard is not applicable for such units as:
a) pumps,
b) exchangers,
c) boiler installations, tank installations,
d) consumer installations.
However, the full functional ability and durability of such units should be ensured in consideration of the impacts from the district heating system and other impacts occurring from the conditions under which they have been installed.
Guidelines for product quality inspection and in situ tests of joints are given in Annex A of EN 448:2009, Annex D of EN 253:2009, Annex A of EN 488:2009 and Annex B of EN 489:2009.
Guidelines for welding of polyethylene casing are given in Annex B of EN 448:2009.
The estimation of expected life with continuous operation at various temperatures is outlined in Annex B of EN 253:2009.
Auslegung und Installation von werkmäßig gedämmten Verbundmantelrohren für die Fernwärme
Conception et installation des systèmes bloqués de tuyaux préisolés pour les réseaux enterrés d'eau chaude
Načrtovanje in vgradnja izoliranih vezanih cevnih sistemov za daljinsko ogrevanje
General Information
- Status
- Not Published
- Technical Committee
- CEN/TC 107 - Pre-fabricated district heating pipe systems
- Drafting Committee
- CEN/TC 107 - Pre-fabricated district heating pipe systems
- Current Stage
- 5060 - Closure of Vote - Formal Approval
- Start Date
- 14-Apr-2010
- Due Date
- 24-Apr-2011
- Completion Date
- 14-Apr-2010
Relations
- Effective Date
- 19-Jan-2023
- Amends
EN 13941:2009 - Design and installation of preinsulated bonded pipe systems for district heating - Effective Date
- 17-Oct-2009
Overview
EN 13941:2009/FprA1 - Design and installation of preinsulated bonded pipe systems for district heating - is a CEN European Standard that specifies rules for the design, calculation and installation of preinsulated bonded pipe systems used in buried hot water distribution and transmission networks. It applies to pipe assemblies manufactured in accordance with EN 253 for continuous operation with hot water up to 120°C (occasional peaks to 140°C) and a maximum internal overpressure of 25 bar.
Key topics and technical requirements
- Scope and operating limits: Continuous temperatures up to 120°C, peak up to 140°C, maximum internal pressure 25 bar. Principles may be extended to higher pressures with special pressure-related consideration.
- Design and calculation rules: Requirements for mechanical strength, thermal performance and durability of preinsulated bonded pipe systems used in buried district heating networks.
- Material and component requirements: Pipe assemblies should comply with EN 253; non‑standard components must have documented material properties and durability demonstrating conformance with the standard’s functional requirements.
- Wall thickness and dimensions: For larger pipe dimensions or pressures under 25 bar, greater wall thickness than EN 253 may be required for straight pipes, bends and tees.
- Hydraulic and thermal considerations: Design accounts for hot water circulation, pressure effects and thermal expansion.
- Joints, fittings and valves: Guidance on joints, sealing and installation practices. Expansion sections must prevent bending moments on valve stems (e.g., with casing pipes or foam cushions).
- Testing and inspection: References to product quality inspection and in situ joint testing in related standards (see Related Standards). Welding guidelines for polyethylene casing are referenced.
- Water quality assumption: The standard assumes treated water (softened, demineralised, deaerated or chemically treated) to prevent internal corrosion and deposits.
- Exclusions: Not applicable to pumps, heat exchangers, boiler and tank installations, or consumer installations - though their functionality must be preserved considering district heating impacts.
Applications and who uses it
- Used by: district heating designers, civil and mechanical engineers, manufacturers of preinsulated pipes, contractors, installation supervisors, asset owners and public authorities.
- Typical applications: Buried hot water distribution and transmission networks, pipelines in ducts, valve chambers, road crossings, and other adjacent piping installations where preinsulated bonded pipe systems provide thermal insulation and mechanical protection.
- Practical value: Ensures safe, durable, thermally efficient buried piping networks for urban and industrial district heating projects while providing harmonised technical criteria for design, testing and installation.
Related standards
- EN 253 (preinsulated bonded pipe assemblies)
- EN 448 (product quality inspection; polyethylene casing welding guidance)
- EN 488, EN 489 (joint testing and inspection guidance)
Keywords: EN 13941:2009/FprA1, preinsulated bonded pipe systems, district heating, EN 253, buried hot water distribution, design and installation, thermal insulation, pressure 25 bar, temperatures 120°C–140°C.
Frequently Asked Questions
EN 13941:2009/FprA1 is a draft published by the European Committee for Standardization (CEN). Its full title is "Design and installation of preinsulated bonded pipe systems for district heating". This standard covers: This European Standard specifies rules for design, calculation and installation for preinsulated bonded pipe systems for buried hot water distribution and transmission networks (cf. figure 2) with pipe assemblies in accordance with EN 253, for continuous operation with hot water at various temperatures up to 120ºC and occasionally with peak temperatures up to 140ºC and maximum internal pressure 25 bar (overpressure). Application rule: For larger pipe dimensions and pressures below 25 bar wall thickness bigger than specified in EN 253 can be required for straight pipes, bends and tees. The principles of the standard can be applied to preinsulated pipe systems with pressures higher than 25 bar, provided that special attention is paid to the effects of pressure. Adjacent pipes belonging to the network (e.g. pipes in ducts, valve chambers, road crossings above ground etc.) can be designed and installed according to this standard. The standard assumes use of treated water, which by softening, demineralisation, deaeration, adding of chemicals, or otherwise has been treated to prevent internal corrosion and deposits in the pipes. This standard is not applicable for such units as: a) pumps, b) exchangers, c) boiler installations, tank installations, d) consumer installations. However, the full functional ability and durability of such units should be ensured in consideration of the impacts from the district heating system and other impacts occurring from the conditions under which they have been installed. Guidelines for product quality inspection and in situ tests of joints are given in Annex A of EN 448:2009, Annex D of EN 253:2009, Annex A of EN 488:2009 and Annex B of EN 489:2009. Guidelines for welding of polyethylene casing are given in Annex B of EN 448:2009. The estimation of expected life with continuous operation at various temperatures is outlined in Annex B of EN 253:2009.
This European Standard specifies rules for design, calculation and installation for preinsulated bonded pipe systems for buried hot water distribution and transmission networks (cf. figure 2) with pipe assemblies in accordance with EN 253, for continuous operation with hot water at various temperatures up to 120ºC and occasionally with peak temperatures up to 140ºC and maximum internal pressure 25 bar (overpressure). Application rule: For larger pipe dimensions and pressures below 25 bar wall thickness bigger than specified in EN 253 can be required for straight pipes, bends and tees. The principles of the standard can be applied to preinsulated pipe systems with pressures higher than 25 bar, provided that special attention is paid to the effects of pressure. Adjacent pipes belonging to the network (e.g. pipes in ducts, valve chambers, road crossings above ground etc.) can be designed and installed according to this standard. The standard assumes use of treated water, which by softening, demineralisation, deaeration, adding of chemicals, or otherwise has been treated to prevent internal corrosion and deposits in the pipes. This standard is not applicable for such units as: a) pumps, b) exchangers, c) boiler installations, tank installations, d) consumer installations. However, the full functional ability and durability of such units should be ensured in consideration of the impacts from the district heating system and other impacts occurring from the conditions under which they have been installed. Guidelines for product quality inspection and in situ tests of joints are given in Annex A of EN 448:2009, Annex D of EN 253:2009, Annex A of EN 488:2009 and Annex B of EN 489:2009. Guidelines for welding of polyethylene casing are given in Annex B of EN 448:2009. The estimation of expected life with continuous operation at various temperatures is outlined in Annex B of EN 253:2009.
EN 13941:2009/FprA1 is classified under the following ICS (International Classification for Standards) categories: 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.
EN 13941:2009/FprA1 has the following relationships with other standards: It is inter standard links to EN 13941:2009+A1:2010, EN 13941:2009. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase EN 13941:2009/FprA1 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)
SLOVENSKI STANDARD
01-marec-2010
1DþUWRYDQMHLQYJUDGQMDL]ROLUDQLKYH]DQLKFHYQLKVLVWHPRY]DGDOMLQVNRRJUHYDQMH
Design and installation of preinsulated bonded pipe systems for district heating
Auslegung und Installation von werkmäßig gedämmten Verbundmantelrohren für die
Fernwärme
Conception et installation des systèmes bloqués de tuyaux préisolés pour les réseaux
enterrés d'eau chaude
Ta slovenski standard je istoveten z: EN 13941:2009/FprA1
ICS:
91.140.10 Sistemi centralnega Central heating systems
ogrevanja
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
FINAL DRAFT
EN 13941:2009
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA1
January 2010
ICS 23.040.10; 91.140.10
English Version
Design and installation of preinsulated bonded pipe systems for
district heating
Conception et installation des systèmes bloqués de tuyaux Auslegung und Installation von werkmäßig gedämmten
préisolés pour les réseaux enterrés d'eau chaude Verbundmantelrohren für die Fernwärme
This draft amendment is submitted to CEN members for unique acceptance procedure. It has been drawn up by the Technical Committee
CEN/TC 107.
This draft amendment A1, if approved, will modify the European Standard EN 13941:2009. 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 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
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
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2010 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13941:2009/FprA1:2010: E
worldwide for CEN national Members.
Contents Page
Foreword .3
1 Modifications to 5.1 .4
2 Modification to 5.2.2 .4
3 Modification to 5.2.3.3 .4
4 Modification to 5.2.6 .4
5 Modification to 6.4.4.1 .4
6 Modification to 6.4.6 .4
7 Modification
...
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