EN 13941-2:2019
(Main)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 Installation von gedämmten Einzel- und Doppelrohr-Verbundsystemen für direkt erdverlegte Heißwasser-Fernwärmenetze - Teil 2: Installation
Dieses Dokument legt Auslegungs-, Berechnungs- und Verlegungsanforderungen für werkmäßig hergestellte, gedämmte Einzel- und Doppelrohrverbundsysteme für erdverlegte Heizwasser-Fernwärmenetze fest, die für den Dauerbetrieb mit aufbereitetem Wasser bei unterschiedlichen Temperaturen bis 120 °C und gelegentlichen Spitzentemperaturen bis 140 °C für höchstens 300 h/a sowie bei maximalem Innendruck von 2,5 MPa vorgesehen sind.
Flexible Rohrsysteme nach EN 15632 liegen nicht im Anwendungsbereich dieser Norm.
Die Norm EN 13941, Auslegung und Installation von gedämmten Einzel- und Doppelrohr-Verbundsystemen für direkt erdverlegte Heizwasser-Fernwärmenetze besteht aus zwei Teilen:
a) EN 13941 1: Auslegung
b) EN 13941 2: Installation
Die Anforderungen in diesem Teil, EN 13941 2, bilden eine Einheit mit jenen aus EN 13941 1.
Die Grundsätze der Norm können auf wärmegedämmte Rohrleitungssysteme mit Drücken über 2,5 MPa angewendet werden, vorausgesetzt, die Auswirkungen dieses höheren Drucks werden besonders beachtet.
Angrenzende Rohre, die zum Netz gehören aber nicht erdverlegt sind (z. B. Rohre in Kanälen, Armaturenschächten, oberirdische Straßenüberquerungen usw.), können entsprechend dieser Norm ausgelegt und verlegt werden.
Die Norm setzt die Verwendung von aufbereitetem Wasser voraus, das durch Enthärtung, Entsalzung, Entlüftung, Zusatz von Chemikalien oder auf andere Art und Weise so behandelt worden ist, dass innere Korrosion und Ablagerungen in den Leitungen effektiv vermieden werden.
ANMERKUNG Für weitere Informationen zu den Qualitäten des in Fernwärmerohrsystemen zu verwendenden Wassers, siehe Literaturhinweis [8].
Dieses Dokument gilt nicht für Geräte bzw. Anlagen, wie z. B.:
a) Pumpen,
b) Wärmetauscher;
c) Kessel, Speicher;
d) Systeme hinter Hausregelstationen.
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
La présente Norme européenne spécifie les exigences de conception, de calcul et d'installation de systèmes bloqués de tuyaux monotubes et bitubes isolés thermiquement fabriqués en usine pour les réseaux d'eau chaude enterrés directement pour une exploitation en continu avec de l'eau chaude traitée à différentes températures jusqu'à 120 °C, et occasionnellement avec des pics de température jusqu'à 140 °C et une pression interne maximale de 2,5 MPa. Les systèmes de tuyaux flexibles selon l'EN 15632 ne sont pas couverts par le domaine d'application de la présente Norme.
L'EN 13941, 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 se compose des deux parties suivantes :
a) EN 13941-1 : Conception ;
b) EN 13941-2 : Installation.
Les exigences et dispositions de la présente partie prEN 13941-2 et celles du prEN 13941-1 constituent un tout indivisible. La présente partie doit donc exclusivement être utilisée conjointement avec le prEN 13941-1.
Les principes de la présente Norme peuvent être appliqués à des systèmes de tuyaux isolés thermiquement avec des pressions supérieures à 2,5 MPa, pourvu qu'il soit porté une attention spéciale aux effets de la pression.
Les tuyaux adjacents, non enterrés, mais appartenant au réseau (par exemple tubes en caniveaux, chambres à vannes, traversées de route en aérien, etc.) peuvent être conçus et installés conformément à la présente Norme.
La présente Norme présuppose l'utilisation d'eau traitée, par adoucissement, déminéralisation, désaération, ajout de substances chimiques, ou par tout autre moyen permettant d'éviter efficacement la corrosion interne et les dépôts dans les tuyaux.
La présente Norme n'est pas applicable aux éléments tels que :
a) pompes ;
b) échangeurs thermiques ;
c) chaudières, réservoirs ;
d) systèmes sous-tendant des sous-stations domestiques.
Cevi za daljinsko ogrevanje - Projektiranje in vgradnja toplotno izoliranih spojenih eno- in dvocevnih sistemov za neposredno zakopana vročevodna omrežja - 2. del: Vgradnja
Ta evropski standard določa zahteve za projektiranje, izračun in vgradnjo tovarniško izdelanih toplotno izoliranih spojenih eno- in dvocevnih sistemov za neposredno zakopana omrežja za neprekinjeno delovanje z obdelano vročo vodo pri različnih temperaturah do 120 °C in občasnih najvišjih temperaturah do 140 °C ter najvišjemu notranjemu tlaku 2,5 MPa. Ta standard ne zajema gibkih cevnih sistemov v skladu s standardom EN 15632.
Standard EN 13941 – Projektiranje in vgradnja toplotno izoliranih spojenih eno- in dvocevnih sistemov za neposredno zakopana vročevodna je sestavljen iz dveh delov:
a) Standard EN 13941-1: Zasnova
b) Standard EN 13941-2: Vgradnja
Zahteve in določbe iz tega dela standarda: prEN 13941-2 tvorijo neločljivo enotnost z zahtevami in določbami standarda prEN 13941-1. Ta del se zato uporablja izključno skupaj s standardom prEN 13941-1.
Načela standarda se lahko uporabljajo za toplotno izolirane cevne sisteme s tlaki, višjimi od 2,5 MPa, če je posebna pozornost namenjena učinkom tlaka.
Sosednje cevi, ki niso zakopane, vendar pripadajo omrežju (npr. cevi v jaških, ventilskih komorah, cestnih prehodih nad tlemi itd.), je mogoče projektirati in vgraditi na podlagi tega standarda.
Ta standard predpostavlja uporabo obdelane vode, ki z mehčanjem, demineralizacijo, razzračevanjem, dodajanjem kemikalij ali z drugo obdelavo učinkovito preprečuje notranjo korozijo in nastajanje oblog na ceveh.
Ta standard se ne uporablja za enote, kot so:
a) črpalke,
b) izmenjevalniki toplote,
c) kotli, rezervoarji,
d) sistemi za domačimi razdelilnimi postajami.
General Information
Relations
Frequently Asked Questions
EN 13941-2:2019 is a standard published by the European Committee for Standardization (CEN). 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.
EN 13941-2:2019 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.
EN 13941-2:2019 has the following relationships with other standards: It is inter standard links to EN 13941:2009+A1:2010, EN 13941-2:2019+A1:2021, EN 13941-2:2019/prA1. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase EN 13941-2:2019 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-julij-2019
Nadomešča:
SIST EN 13941:2009+A1:2010
Cevi za daljinsko ogrevanje - Projektiranje in vgradnja toplotno izoliranih spojenih
eno- in dvocevnih sistemov za neposredno zakopana vročevodna omrežja - 2. del:
Vgradnja
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 Installation von gedämmten Einzel- und Doppelrohr-
Verbundsystemen für direkt erdverlegte Heizwasser-Fernwärmenetze - Teil 2:
Installation
Tuyaux de chauffage urbain - Conception et installation des systèmes bloqués de tuyaux
préisolés pour les réseaux enterrés d'eau chaude - Partie 2 : Installation
Ta slovenski standard je istoveten z: EN 13941-2:2019
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.
EN 13941-2
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2019
EUROPÄISCHE NORM
ICS 23.040.07; 23.040.10; 91.140.10 Supersedes EN 13941:2009+A1:2010
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 Installation von
des systèmes bloqués de tuyaux monotubes et bitubes gedämmten Einzel- und Doppelrohr-Verbundsystemen
isolés thermiquement pour les réseaux d'eau chaude für direkt erdverlegte Heizwasser-Fernwärmenetze -
enterrés directement - Partie 2 : Installation Teil 2: Installation
This European Standard was approved by CEN on 14 December 2018.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European 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 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13941-2:2019 E
worldwide for CEN national Members.
Contents Page
European foreword . 6
Introduction . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions and symbols . 11
3.1 Terms and definitions . 11
3.2 Symbols. 11
3.3 Abbreviations . 11
4 Procurement . 11
4.1 Manufacturer of thermal insulated pipe elements . 11
4.2 Performing assembly of casing joints and PE-welding on casings . 11
5 General requirements . 12
6 Required information . 12
6.1 Documents from the design phase. 12
6.2 Documents from the manufacturers . 12
6.3 Existing construction and underground systems . 13
6.3.1 General . 13
6.4 Wiring design diagram . 13
7 Quality control . 13
7.1 General . 13
7.2 Installation and approval . 14
8 Site preparation . 15
8.1 General . 15
8.2 Liason with Authorities and other parties concerned . 16
8.3 Site access . 16
8.4 Equipment and material . 16
9 Trenching . 17
9.1 General . 17
9.2 Groundwater extraction . 17
9.3 Installation of pipelines crossing or parallel with other constructions and existing
conduits . 18
9.4 Excavations crossing or parallel to existing district heating pipelines, reducing of
soil cover, etc . 18
10 Transport and storage of pipe elements, pipe components and other materials . 18
10.1 General . 18
10.2 Transport and delivery . 18
10.2.1 Loading and unloading . 18
10.2.2 Checking of the delivery . 19
10.3 Storage . 19
10.3.1 General . 19
10.3.2 Storage of pipe assemblies . 19
10.3.3 Storage of fitting and valve assemblies . 20
10.3.4 Storage of joint casing systems and other materials . 20
11 Pipe laying . 20
11.1 General . 20
11.2 Installation in the trench . 21
11.3 Welding and testing of welds . 21
11.3.1 Welding of the steel service pipe and testing of the welds . 21
11.4 Venting and Draining . 30
11.5 Test for leak tightness and strength . 34
11.5.1 General . 34
11.5.2 Visual test with over pressure by air . 34
11.5.3 Visual test below atmospheric pressure by air . 35
11.5.4 Hydrostatic test . 35
11.6 Joint Casing . 39
11.6.1 General . 39
11.6.2 Joints . 39
11.6.3 Site prepared components . 39
11.7 Surveillance system . 42
11.8 Expansion cushions . 43
11.9 Electrical and telecommunication cable of the systems . 45
11.10 Requirements for horizontal directional drilling (HDD) . 45
11.11 Requirements for critical locations . 45
11.11.1 Wall penetrations . 45
11.11.2 Connections to other pipe systems . 46
11.11.3 Pipe laying in protection tubes. 46
11.11.4 Protection against external impact for above ground installations . 46
11.12 Position of pipeline . 46
12 Backfilling . 47
12.1 General . 47
12.2 Bedding material and composition . 48
13 Commissioning . 49
14 Operation. 49
15 Documentation . 49
15.1 Information on operation and maintenance . 49
15.1.1 Range of application . 49
15.1.2 Documentation — aims and uses. 49
15.1.3 Technical documentation . 50
15.1.4 Drawings of the technical documentation . 54
15.1.5 As-built documentation. 58
15.2 Documentation under the scope of the PED . 58
Annex A (informative) Venting and Draining . 59
A.1 General . 59
A.2 Venting and draining devices . 59
A.3 Draining devices for large pipeline dimensions . 61
A.4 Venting of new pipe sections . 62
A.4.1 Venting by house connection pipeline . 62
A.4.2 Venting by venting cabinets . 63
Annex B (informative) Recommendations for HDD . 65
B.1 General . 65
B.2 Depth under roads . 65
B.3 Minimum intermediate distances . 66
B.4 Casing and casing field joints . 66
B.5 Drilling fluid composition . 66
B.6 Drilling fluid pressures . 66
B.7 Borehole dimensions and borehole stability . 67
B.8 Ballasting . 67
B.9 Installation of pipe bundles . 68
B.10 Determination of position and route corrections . 68
B.11 Registration and control of HDD . 69
B.12 Drilling Tolerances . 69
B.13 Verification of design and methodology for the pullback operation . 70
B.14 As-Built information . 70
Annex C (informative) Qualification of fitters installing joints in pre-insulated bonded pipe
networks . 71
C.1 Knowledge and skills . 71
C.2 Background for training and testing . 71
C.3 Subjects for training and testing . 71
C.3.1 General . 71
C.3.2 Casing of polyethylene (PE) . 72
C.3.2.1 Important construction characteristics and properties . 72
C.3.2.2 Technological behaviour of PE . 72
C.3.2.3 Mechanical properties of PE . 72
C.3.2.4 Conditions for casing elements under load . 73
C.3.3 Surveillance . 73
C.3.4 PUR-foam system . 73
C.3.4.1 PUR-foam as a two component material . 73
C.3.4.2 Insulation procedures on job site . 73
C.3.5 Joint types/jointing systems . 74
C.3.5.1 General . 74
C.3.5.2 Shrink sleeve joint with mastic/adhesive sealing . 74
C.3.5.3 Welded joints/systems . 74
C.3.6 Installation of joints . 75
C.3.6.1 General . 75
C.3.6.2 Installation of surveillance system . 75
C.3.6.3 Sealed joints . 76
C.3.6.4 Welded joints . 77
C.3.6.5 Insulation of joints . 77
C.3.6.6 Documentation . 78
Annex D (informative) Quality control program and documentation . 79
Annex E (normative) Commissioning . 91
E.1 Commissioning . 91
E.1.1 General . 91
E.1.2 Filling with water for initial operation . 92
E.1.3 Surveillance system . 92
Annex F (informative) Operation . 93
Bibliography . 94
European foreword
This document (EN 13941-2:2019) 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 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 October 2019, and conflicting national standards shall
be withdrawn at the latest by October 2019.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 13941:2009+A1:2010.
EN 13941, District heating pipes — Design and installation of thermal insulated bonded single and twin
pipe systems for directly buried hot water networks consists of the following parts:
— Part 1: Design;
— Part 2: Installation.
According to the CEN-CENELEC Internal Regulations, the national standards organisations 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, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Introduction
This document has been prepared by CEN/TC 107/WG 13 „Prefabricated district heating and district
cooling pipe system“.
According to the scope of CEN/TC 107:
— the task of CEN/TC 107/WG 13 is to specify rules for design, calculation and installation for factory
made thermal insulated bonded single and twin pipe systems for directly buried hot water
networks.;
— CEN/TC 107/WG 13 also contributes to rules for functional tests for thermal-insulated bonded pipe
systems for underground hot water networks;
When use is made of the standard, the different sections of which it is made up are to be interpreted as
being interdependent and, because of this, cannot be dissociated.
The revision of EN 13941:2009+A1:2010 involves the subdivision of the document in two separate
documents:
— EN 13941-1, District heating pipes — Design and installation of thermal insulated bonded single and
twin pipe systems for directly buried hot water networks — Part 1: Design;
— EN 13941-2, 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 volume (Part 2) consists of a main part and six annexes.
Annex E is normative. Annexes A, B, C, D, and F are informative.
This standard contains a number of requirements aimed at ensuring the sound execution of distribution
networks for district heating.
The requirements contained in this document should be assessed and applied in compliance with the
intentions of the standard and in due consideration of the development taking place in the field it
concerns. It is therefore assumed that the user of the standard has the requisite technical insight and
that the user of the standard has adequate knowledge of legal and other external regulations that are of
consequence to the practical application of the document.
Some paragraphs of this standard are possibly covered by national regulations in some countries
NOTE
which naturally apply instead of this standard.
1 Scope
This document specifies requirements for design, calculation and installation of factory made thermal
insulated bonded single and twin pipe systems for buried hot water networks for continuous operation
with treated water at various temperatures up to 120 °C and occasionally peak temperatures up to
140 °C for maximum 300 h/a, and maximum internal pressure 2,5 MPa.
Flexible pipe systems according to the EN 15632 series 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 in this part, EN 13941-2, form a unity with those of EN 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 this higher 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, demineralization, de-aeration,
adding of chemicals, or otherwise has been treated to effectively prevent internal corrosion and
deposits in the pipes.
NOTE For further information on water qualities to be used in district heating pipe systems, see bibliographic
entry [8].
This document is not applicable for such units as:
a) pumps;
b) heat exchangers;
c) boilers, tanks;
d) systems behind domestic substations.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 253, District heating pipes — Bonded single pipe systems for directly buried hot water networks —
Factory made pipe assembly of steel service pipe, polyurethane thermal insulation and outer casing of
polyethylene
EN 448, District heating pipes - Preinsulated bonded pipe systems for directly buried hot water networks -
Fitting assemblies of steel service pipes, polyurethane thermal insulation and outer casing of polyethylene
EN 488, District heating pipes - Preinsulated bonded pipe systems for directly buried hot water networks -
Steel valve assembly for steel service pipes, polyurethane thermal insulation and outer casing of
polyethylene
EN 489, District heating pipes - Preinsulated bonded pipe systems for directly buried hot water networks -
Joint assembly for steel service pipes, polyurethane thermal insulation and outer casing of polyethylene
EN 10204, Metallic products - Types of inspection documents
EN 13018, Non-destructive testing - Visual testing - General principles
EN 13480-5, Metallic industrial piping - Part 5: Inspection and testing
prEN 13941-1, District heating pipes - Design and installation of thermal insulated bonded single and twin
pipe systems for directly buried hot water networks — Part 1: Design
EN 14419:2009, District heating pipes - Preinsulated bonded pipe systems for directly buried hot water
networks - Surveillance systems
EN 15698 (all parts), District heating pipes — Bonded twin pipe systems for directly buried hot water
networks
EN 17248, District heating and district cooling pipe systems - Terms and definitions
EN ISO 3452-1, Non-destructive testing - Penetrant testing - Part 1: General principles (ISO 3452-1)
EN ISO 3834-1, Quality requirements for fusion welding of metallic materials - Part 1: Criteria for the
selection of the appropriate level of quality requirements (ISO 3834-1)
EN ISO 3834-3, Quality requirements for fusion welding of metallic materials - Part 3: Standard quality
requirements (ISO 3834-3)
EN ISO 3834-4, Quality requirements for fusion welding of metallic materials - Part 4: Elementary quality
requirements (ISO 3834-4)
EN ISO 5579, Non-destructive testing - Radiographic testing of metallic materials using film and X- or
gamma rays - Basic rules (ISO 5579)
EN ISO 5817:2014, Welding - Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding
excluded) - Quality levels for imperfections (ISO 5817:2014)
EN ISO 9606-1, Qualification testing of welders - Fusion welding - Part 1: Steels (ISO 9606-1)
EN ISO 9712, Non-destructive testing - Qualification and certification of NDT personnel (ISO 9712)
EN ISO 9934-1, Non-destructive testing - Magnetic particle testing - Part 1: General principles (ISO 9934-
1)
EN ISO 10675-1, Non-destructive testing of welds - Acceptance levels for radiographic testing - Part 1:
Steel, nickel, titanium and their alloys (ISO 10675-1)
EN ISO 11666, Non-destructive testing of welds - Ultrasonic testing - Acceptance levels (ISO 11666:2018)
EN ISO 14731:2006, Welding coordination - Tasks and responsibilities (ISO 14731:2006)
Under preparation. Stage at time of publication: prEN 17248:2018.
EN ISO 14732, Welding personnel - Qualification testing of welding operators and weld setters for
mechanized and automatic welding of metallic materials (ISO 14732)
EN ISO 15609-1, Specification and qualification of welding procedures for metallic materials - Welding
procedure specification - Part 1: Arc welding (ISO 15609-1)
EN ISO 15609-2, Specification and qualification of welding procedures for metallic materials - Welding
procedure specification - Part 2: Gas welding (ISO 15609-2)
EN ISO 15610, Specification and qualification of welding procedures for metallic materials - Qualification
based on tested welding consumables (ISO 15610)
EN ISO 15613, Specification and qualification of welding procedures for metallic materials - Qualification
based on pre-production welding test (ISO 15613)
EN ISO 15614-1, Specification and qualification of welding procedures for metallic materials - Welding
procedure test - Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloys (ISO
15614-1)
EN ISO 16810, Non-destructive testing - Ultrasonic testing - General principles (ISO 16810)
EN ISO 17636-1, Non-destructive testing of welds - Radiographic testing - Part 1: X- and gamma-ray
techniques with film (ISO 17636-1)
EN ISO 17636-2, Non-destructive testing of welds - Radiographic testing - Part 2: X- and gamma-ray
techniques with digital detectors (ISO 17636-2)
EN ISO 17637, Non-destructive testing of welds - Visual testing of fusion-welded joints (ISO 17637)
EN ISO 17638, Non-destructive testing of welds - Magnetic particle testing (ISO 17638)
EN ISO 17640, Non-destructive testing of welds - Ultrasonic testing - Techniques, testing levels, and
assessment (ISO 17640)
EN ISO 23277, Non-destructive testing of welds - Penetrant testing - Acceptance levels (ISO 23277)
EN ISO 23278, Non-destructive testing of welds - Magnetic particle testing - Acceptance levels (ISO 23278)
ISO 6761, Steel tubes — Preparation of ends of tubes and fittings for welding
HD 308 S2, Identification of cores in cables and flexible cords
3 Terms and definitions and symbols
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 17248 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.2 Symbols
For the purposes of this document, the symbols and indices given in EN 13941-1 apply.
3.3 Abbreviations
For the purposes of this document, the abbrevations given in EN 13941-1 apply.
4 Procurement
4.1 Manufacturer of thermal insulated pipe elements
For the quality control program and documentation for suitable thermal insulated pipe elements see
Annex D.
NOTE For the quality control of factory made thermal insulated pipe elements see for example EHP 001 [1]
and EHP 003 [15].
4.2 Performing assembly of casing joints and PE-welding on casings
For the assembly of casing joints and PE-welding on casings the following points need to be considered:
a) the work shall be performed only by qualified fitters and PE-welders:
— An example for a scheme for the required knowlage and skills for fitters and PE welders is
)
given in Annex C .
NOTE Other qualification schemes for fitters and PE welders may exist at national level
b) Experienced and qualified management personnel as foreman and quality inspector:
The Supervising personnel and quality inspection personnel shall be trained as fitter and PE-
welder;
c) Appropriate and serviceable tools, equipment and machinery.
For the quality control program and service life documentation for assembling of joints and PE-welding
on the casing, see Table D.6 and Table D.8.
Under preparation. Stage at time of publication: prEN 17248:2018.
5 General requirements
Any pipe installation shall be made on basis of design documentation that is sufficiently detailed to
ensure execution of the project presupposed quality.
The installation of a pipe system shall be done
— in accordance with the installation plan and the instructions of the manufacturers of either the
system or the pipe and components, as applicable,
— in accordance with the design documentation so to ensure the adequate safety of fitters and other
personnel on-site as well as any third persons,
— that installation and operation do not harm to other structures or construction works, e.g. roads.
Project classes including the required design documentation shall be determined according to
EN 13941-1.
For the installation and assembly of pipe elements and pipe components only materials and methods,
which meet the specified instructions and standards shall be used.
Pipeline sections, which cannot be installed in compliance with this standard such as other than pipe
sections with pipe elements, e.g. bridge crossings, water course crossings, protection pipes should be
installed by skilled personnel according to the project drawings and corresponding other standards,
and codes.
If changes are made during installation, the design documentation shall be changed accordingly. The
constructive and static consequences of any changes that may become necessary shall be examined.
The risk assessment of the pipe system is being described in EN 13941-1.
The environmental requirements according to the legislators have to be followed. These requirements
can differ from place to place and are depending on the authority in charge.
It is permissible to use alternative rules from the notes given in this standard, provided that it is shown
that the alternative rule accords with the relevant principles and it is at least equivalent with regard to
the resistance, serviceability and durability achieved by the system.
6 Required information
6.1 Documents from the design phase
A full set of updated data, in accordance with EN 13941-1 shall be available at the construction site, The
information shall include at least the latest information about the local situation, vertical cover,
dimensions of all existing and planned underground systems, including related facilities, such as shafts .
It shall be checked that the expansion cushions, as delivered at the construction site, comply with the
requirements ofEN 13941-1
6.2 Documents from the manufacturers
The following documents shall be provided by the manufacturer on request:
— a installation manual.
In the installation manual, the manufacturer shall provide instructions about how to install the pipe
elements and the pipe components. It should also give recommendation about handling, storage on-
site, welding, jointing, backfilling in accordance with Clauses 10, 11 and 12.
6.3 Existing construction and underground systems
6.3.1 General
A full set of all detail plans of existing underground systems, like route plans, shaft drawings, detail and
manufacturing drawings as well as static calculations should provide all information to prevent damage
to existing underground systems.
National and local regulations and requirements on the location of service conduits, ducts and associate
installations shall be complied with.
NOTE At works in the earth there is always the danger that existing underground systems get damaged. To
the most important underground systems rank among:
— district heating pipelines;
— gas and water pipelines;
— electric cable;
— telecommunication cable;
— sewerages and rainwater pipelines;
— underground railway;
— and other ones.
6.4 Wiring design diagram
To locate any deviation as precisely as possible, a technical documentation according to EN 14419 is
required.
During installation a wiring design diagram for each measuring section is required, consisting of:
— drawing with legend;
— wiring diagram including all measuring elements, all connected branches and their respective
destination;
— drawing showing the location of connection points, etc.
7 Quality control
7.1 General
For basics of quality control see EN 13941-1.
The range of documented information shall be defined in relation to the kind of the work and the
project class.
All components and materials and all activities carried out (e.g. civil engineering work, pipe installation,
assembling of joints, testing and evaluating of test results) shall be documented in an appropriate
manner.
The construction progress should be documented in form of daily reports which should include the
essential information from the work on-site. Depending on the kind of project, the following
information can be necessary:
— Date and location
— Information on the weather
— Present, supervising persons with duration of presence
— Information about the personnel and machine used
— Information on subcontractors working
— Information on construction site safety
— Type, extent and duration of the work
— Instructions given by the supervisor for the on–site construction, the purchaser or his
representative
— Special incidents, e.g. such as accidents
— Transferred and received documents
— Interrupts and hindrances
— Names of persons responsible for on-site construction
— Steel welds, PE-welds, casing joints, surveillance systems, preheating and expansion cushions
A detailed overview of the technical documentation is written in Table 8.
The daily reports shall lead chronologically together in a general report at the end of the construction
work.
For special situations, it is recommended to perform a visual proof with clearly identifiable photos as
support measures. This can be for example:
— difficult installation situations in the near of supply systems by other owners (e.g. electricity, water,
telecommunication);
— performed works (e.g. assembling of expansion cushions).
7.2 Installation and approval
Further information on the qualitiy control are given in Annex D.
8 Site preparation
8.1 General
In consitency with national regulations, the site preparation for pipelines and facilities shall be such
that the safety i
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The EN 13941-2:2019 standard provides comprehensive guidelines for the design and installation of thermal insulated bonded single and twin pipe systems tailored for directly buried hot water networks. Its primary focus lies on ensuring reliable and efficient operation of these pipe systems at sustained temperatures of up to 120 ºC, with allowances for occasional peak temperatures reaching 140 ºC, under a maximum internal pressure of 2.5 MPa. The specification of these parameters underscores the standard's strength in promoting safety and performance reliability in district heating applications. One of the notable strengths of EN 13941-2:2019 is its holistic approach, which stipulates that the installation practices must be read in conjunction with the design principles outlined in EN 13941-1. This creates a seamless integration between design and installation, enhancing the overall quality control of the systems being implemented. Furthermore, the clarity in scope regarding the applicability of flexible systems and the emphasis on treated water serves to set clear boundaries, ensuring that practitioners understand the contexts in which the standard can be effectively applied, while preventing potential misuse. The standard also demonstrates relevance in contemporary applications, as it addresses the essential requirement for treated water to prevent internal corrosion and deposits, a critical factor in maintaining the longevity and operational effectiveness of thermal pipes. The inclusion of provisions for the design and installation of adjacent above-ground pipes extends its applicability beyond buried systems, thereby catering to a wider range of installations in district heating networks. Overall, EN 13941-2:2019 serves as an essential document for the European heating sector, providing robust standards that enhance the design and operational integrity of thermal insulated pipe systems. Its clear framework and focus on multi-system application affirm its position as a vital resource for professionals engaged in the installation and maintenance of hot water networks.
Die Norm EN 13941-2:2019 legt spezifische Anforderungen an das Design und die Installation von wärmeisolierten, verklebten Einzel- und Doppelrohrsystemen für direkt vergrabene Heizungsnetze fest. Diese europäische Norm ist besonders relevant für die Planung und den Betrieb von Heizungsnetzen, die mit behandeltem Heißwasser bei verschiedenen Temperaturen bis zu 120 ºC betrieben werden, sowie gelegentlich mit Spitzenwerten bis zu 140 ºC und einem maximalen Innendruck von 2,5 MPa. Ein zentrales Merkmal der Norm ist die klare Abgrenzung und Verbindung zu EN 13941-1, die die Anforderungen an das Design behandelt. Es wird ausdrücklich darauf hingewiesen, dass die Anforderungen in EN 13941-2 nur in Kombination mit EN 13941-1 angewendet werden sollen, was die Konsistenz und Integrität der gesamten Normenreihe unterstreicht. Dieser Aspekt stärkt die Aussagekraft der Norm und stellt sicher, dass die Installation der Rohrsysteme die entworfenen Standards einhält. Darüber hinaus ermöglicht die Norm die Anwendung ihrer Prinzipien auch auf wärmeisolierte Rohrsysteme mit höheren Drücken als 2,5 MPa, sofern besondere Aufmerksamkeit auf die Druckwirkungen gelegt wird. Diese Risikoabwägung ist von großer Bedeutung, da sie die Sicherheit und Langlebigkeit der Heizungsnetze gewährleistet. Ein weiterer Pluspunkt der Norm ist die Voraussetzung, dass behandeltes Wasser verwendet wird, um interne Korrosion und Ablagerungen in den Rohren zu verhindern. Dies stellt sicher, dass die Langlebigkeit und Effizienz der Heizungsnetze maximiert wird und schädliche Auswirkungen durch Wasserqualität vermieden werden. Es ist jedoch wichtig zu beachten, dass spezifische Anlagen wie Pumpen, Wärmetauscher, Kessel und Systeme hinter Hausanschlüssen nicht unter den Geltungsbereich dieser Norm fallen. Diese Einschränkungen sind klar definiert und tragen zur Vermeidung von Missverständnissen oder fehlerhaften Anwendungen bei. Insgesamt bietet die EN 13941-2:2019 eine fundierte Grundlage für die Planung und Installation von Heizungsnetzen, die hohe Anforderungen an Sicherheit und Effizienz stellen. Die klaren Richtlinien und die enge Verknüpfung mit dem Designteil der Norm machen sie zu einem unverzichtbaren Dokument für Fachleute, die im Bereich der Installation von Heizungsrohrsystemen tätig sind.
SIST EN 13941-2:2019は、熱絶縁ボンディングされた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、直接埋設された熱水ネットワークにおける設置に特化しています。この規格は、設計、計算、および工場で製造された熱絶縁ボンディングされた管システムの設置に必要な要件を詳細に示しています。この文書は、温水が120°Cまでのさまざまな温度で継続的に運用され、時には140°Cのピーク温度にも耐えることが求められ、最大内部圧力は2.5MPAを超えないことを規定しています。 EN 13941-2は、EN 13941-1と連携して使用する必要があり、両者の要件は密接に関連しています。この連携により、管路システムの信頼性と安全性が確保されます。この規格の優れた点は、設計と設置の原則が複雑な熱水ネットワークのために体系的に整理されていることです。さらには、EN 15632に準拠する柔軟管システムはこの規格の対象外であることから、特定の用途に対する明確な適用範囲が設定されています。 この標準は、各種の埋設されていない隣接管（例えば、ダクトやバルブ室、道路間の管など）についても設計と設置の基準を提供します。これは、さらなる柔軟性を持たせ、実際の設置条件において多様なシナリオに適応できるように配慮されているためです。 また、標準は処理水の使用を前提としており、内部腐食や堆積物を効果的に防ぐための処置（ソフトニング、脱ミネラル化、脱気、化学薬品の添加など）が必要です。この点においても、処理水の使用要件が明確に例示されており、確実な運用を支える要素となっています。 最後に、この標準が適用されないユニット（ポンプ、熱交換器、ボイラー、タンク、家庭の変電所の背後にあるシステムなど）に関する明示的な除外が記載されていることは、ユーザーやエンジニアにとっての明確なガイダンスとなります。全体として、EN 13941-2:2019は、埋設熱水ネットワークの設計と設置に関して信頼性の高い指針を提供しており、業界における実践的なニーズに応える重要な標準です。
La norme EN 13941-2:2019 s'inscrit dans un cadre européen essentiel pour la conception et l'installation de systèmes de tuyauterie à double et simple paroi, isolés thermiquement, destinés à être enterrés dans des réseaux d'eau chaude. Elle se concentre spécifiquement sur les exigences liées à l'installation de ces systèmes, garantissant ainsi leur efficacité et leur sécurité lors de l'opération à des températures allant jusqu'à 120 ºC avec des pointes occasionnelles atteignant 140 ºC et une pression interne maximale de 2,5 MPa. Le principal atout de cette norme réside dans son approche intégrée, qui lie étroitement les aspects de conception (tels que fournis par EN 13941-1) aux exigences d'installation. Cela permet d'assurer que les systèmes soient non seulement conçus de manière optimale mais également installés conformément aux meilleures pratiques, renforçant ainsi la fiabilité des réseaux de chaleur. La nécessité de suivre cette norme en complément de la partie 1 souligne l'importance de l'harmonisation des deux phases pour une performance globale des systèmes. Un autre point fort de la norme EN 13941-2 est sa capacité à s'adapter à des systèmes de tuyauterie à des pressions supérieures à 2,5 MPa, à condition que des précautions supplémentaires soient prises en compte. Cela démontre une flexibilité et une reconnaissance de la diversité des besoins dans le domaine du chauffage urbain. De plus, la norme prend également en compte les tuyaux adjacents qui ne sont pas enterrés, comme ceux trouvés dans des canaux ou des chambres de vannes, permettant ainsi une extension de son application au-delà des réseaux enterrés. L'accent mis sur l'utilisation d'eau traitée pour prévenir la corrosion interne et les dépôts dans les tuyaux est également un aspect crucial de la norme, garantissant ainsi une durabilité et une performance optimales des installations de chauffage. Cependant, il est clair que cette norme ne couvre pas certains équipements critiques tels que les pompes, les échangeurs de chaleur ou les chaudières, ce qui permet de préciser son champ d'application et d'assurer qu'elle reste focalisée sur l'installation des systèmes de tuyauterie eux-mêmes. Dans l'ensemble, la norme EN 13941-2:2019 se présente comme un document indispensable pour tous les acteurs du secteur de la chaleur urbaine, offrant un cadre solide pour la conception et l'installation de réseaux d'eau chaude, tout en intégrant des exigences précises qui renforcent la sécurité et l'efficacité de ces systèmes.
표준 EN 13941-2:2019는 우수한 단일 및 쌍관 시스템을 위한 설계 및 설치 요건을 제공하는 유럽 표준입니다. 이 표준은 직접 매립된 핫워터 네트워크를 위한 열 절연 성형관 시스템의 설계, 계산, 설치에 대한 요구사항을 명확히 규정합니다. 특히, 최대 120 ºC의 처리된 핫워터를 지속적으로 운전할 수 있으며, 경우에 따라서 최대 140 ºC의 피크 온도와 2.5 MPA의 최대 내부 압력에 대해 설계되었습니다. EN 13941-2의 강점 중 하나는 모든 사용자가 열 절연관 시스템을 안전하게 설계하고 설치할 수 있도록 돕는 명확한 지침을 제공한다는 점입니다. 이 표준은 직접 매립된 네트워크에 적용 가능하며, 일반적인 환경에서 쉽게 활용될 수 있는 기준을 수립합니다. 특히, 이 표준의 적용 가능 범위에는 지하에 매립되지 않은 인접 관(예: 덕트, 밸브 챔버, 도로 교차점 등)도 포함되어 있어, 다양한 설치 환경에서도 유연하게 대응할 수 있는 점이 주목할 만합니다. 또한, EN 13941-2는 내부 부식 및 침전물을 효과적으로 예방하기 위해 처리된 물 사용을 전제로 하고 있어, 장기적인 시스템의 안정성과 효율성을 보장합니다. 이 점은 특히 핫워터 네트워크의 안전성과 신뢰성을 강화하는 데 중요한 요소입니다. 한편, EN 13941-2는 유연한 파이프 시스템(EN 15632 기준)과 관련된 내용을 다루지 않기 때문에, 이 표준의 목적과 적용 범위에 집약적으로 집중할 수 있습니다. 따라서 이 표준은 특정 요구 사항을 충족하기 위해 설계된 시스템과 적합하게 사용될 수 있습니다. 종합적으로, EN 13941-2:2019 표준은 열 절연 성형관 시스템의 설계 및 설치 분야에서 중요한 기초를 제공하며, 관련 산업의 안전성과 신뢰성을 높이는 데 기여합니다.
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