SIST EN 13941-1:2019
(Main)District heating pipes - Design and installation of thermal insulated bonded single and twin pipe systems for directly buried hot water networks - Part 1: Design
District heating pipes - Design and installation of thermal insulated bonded single and twin pipe systems for directly buried hot water networks - Part 1: Design
This European Standard specifies requirements for design, calculation and installation of factory made thermal insulated bonded single and twin pipe systems for directly buried hot water 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) prEN 13941-1: Design;
b) prEN 13941-2: Installation.
The requirements and stipulations in this part: EN 13941-1, form an unbreakable unity with those of prEN 13941-2. This part shall therefore exclusively be used in combination with prEN 13941-2.
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.
NOTE For further information on water qualities to be used in district heating pipe systems see also [1].
This standard is not applicable for such units as:
a) pumps;
b) heat exchangers;
c) boilers, tanks;
d) systems behind domestic substations.
Auslegung und Installation von werkmäßig gedämmten Verbundmantelrohren für die Fernwärme
Dieses Dokument legt Auslegungs-, Berechnungs- und Verlegungsanforderungen für werkmäßig hergestellte wärmegedämmte Einzel- und Doppelrohrverbundsysteme für erdverlegte Warmwassernetzwerke fest, die für den Dauerbetrieb mit 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 der Normenreihe EN 15632 liegen nicht im Anwendungsbereich dieser Norm.
Die Norm EN 13941, Fernwärmerohre — Auslegung und Installation von gedämmten Einzel- und Doppelrohr-Verbundsystemen für direkt erdverlegte Heißwasser-Fernwärmenetze besteht aus zwei Teilen:
a) EN 13941 1: Auslegung
b) EN 13941 2: Installation
Die Anforderungen in diesem Teil, EN 13941 1, bilden eine Einheit mit jenen aus EN 13941 2.
Die Grundsätze der Norm können auf wärmegedämmte Rohrleitungssysteme mit Drücken über 2,5 MPa angewendet werden, vorausgesetzt, die Auswirkungen der Drücke 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.
Dieses Dokument 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 zur Qualität des Wassers, welches bei Fernwärmesystemen eingesetzt wird, siehe auch Literaturhinweis [2].
Diese Norm 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 monotubes ou bitubes isolés thermiquement pour les réseaux d'eau chaude enterrés directement - Partie 1 : Conception
La présente Norme européenne spécifie les exigences relatives à la conception, au calcul et à l'installation de systèmes manufacturés bloqués de monotubes ou bitubes isolés thermiquement pour les réseaux d'eau chaude enterrés directement, pour un service 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 conformes à la série de normes EN 15632 ne relèvent pas du domaine d'application de la présente norme.
La norme EN 13941, Conception et installation des systèmes bloqués de monotubes et bitubes isolés thermiquement pour les réseaux d'eau chaude enterrés directement comprend deux parties :
a) prEN 13941 1 : Conception ;
b) prEN 13941 2 : Installation.
Les exigences et stipulations de la présente partie : prEN 13941 1, sont indissociables de celles du prEN 13941 2. Il convient donc d'utiliser exclusivement la présente partie en combinaison avec le prEN 13941 2.
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 de vanne, traversée 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.
NOTE Pour de plus amples informations sur les qualités d'eau à utiliser dans les systèmes de tuyaux pour le chauffage urbain, voir également la référence [1].
La présente Norme n'est pas applicable aux éléments tels que :
a) pompes ;
b) échangeurs de chaleur ;
c) chaudières, réservoirs ;
d) systèmes en aval des postes de raccordement.
Cevi za daljinsko ogrevanje - Projektiranje in vgradnja toplotno izoliranih spojenih eno- in dvocevnih sistemov za neposredno zakopana vročevodna omrežja - 1. del: Projektiranje
Ta evropski standard določa zahteve za projektiranje, izračun in vgradnjo tovarniško izdelanih toplotno izoliranih spojenih eno- in dvocevnih sistemov za neposredno zakopana vročevodna 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 prEN 13941-1: Zasnova
b) Standard prEN 13941-2: Vgradnja
Zahteve in določbe iz tega dela standarda: EN 13941-1 tvori neločljivo enotnost z zahtevami in določbami standarda prEN 13941-2. Ta del se zato uporablja izključno skupaj s standardom prEN 13941-2.
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.
OPOMBA: Za dodatne informacije o kakovosti vode za uporabo v cevnih sistemih za daljinsko ogrevanje glej tudi [1].
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
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 - 1. del:
Projektiranje
District heating pipes - Design and installation of thermal insulated bonded single and
twin pipe systems for directly buried hot water networks - Part 1: Design
Auslegung und Installation von werkmäßig gedämmten Verbundmantelrohren für die
Fernwärme
Tuyaux de chauffage urbain - Conception et installation des systèmes bloqués de
monotubes ou bitubes isolés thermiquement pour les réseaux d'eau chaude enterrés
directement - Partie 1 : Conception
Ta slovenski standard je istoveten z: EN 13941-1:2019
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 13941-1
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2019
EUROPÄISCHE NORM
ICS 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 1: Design
Tuyaux de chauffage urbain - Conception et installation Auslegung und Installation von werkmäßig
des systèmes bloqués de monotubes ou bitubes isolés gedämmten Verbundmantelrohren für die Fernwärme
thermiquement pour les réseaux d'eau chaude enterrés
directement - Partie 1 : Conception
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 13941-1:2019 E
worldwide for CEN national Members.
Contents Page
European foreword . 8
Introduction .10
1 Scope .11
2 Normative references .11
3 Terms and definitions, units and symbols .12
3.1 Terms and definitions .12
3.1.1 Symbols .13
3.1.2 Abbreviations .19
4 General requirements .19
4.1 Functional requirements.19
4.2 Service life .19
4.3 Preliminary investigations .20
4.4 Determination of project class .21
4.4.1 Risk assessment .21
4.4.2 Project classes .21
4.5 Design documentation .23
4.5.1 General .23
4.5.2 Operational data .24
4.5.3 Data related to the pipe system .24
4.6 Route selection and positioning of the pipes .26
4.6.1 Minimum distances between parallel pipes .26
4.6.2 Parallel excavations and works of third parties .27
4.6.3 Minimum distance between district heating pipes and underground structures .27
4.7 Venting and draining .27
4.8 Valves.27
4.9 Procurement of materials .28
4.9.1 Manufacturer of pipeline components .28
4.10 Quality control .28
4.10.1 General .28
4.10.2 Design phase .28
4.10.3 Installation phase .28
5 Requirements for components and materials .29
5.1 Basic requirements .29
5.2 Steel service pipe components .29
5.2.1 General .29
5.2.2 Specification .30
5.2.3 Characteristic values for steel .30
5.2.4 Specific requirements for bends and T-pieces .31
5.2.5 Specific requirements for small angular deviations .32
5.2.6 Specific requirements for reducers .33
5.3 Polyurethane foam thermal insulation .33
5.4 Casing .33
5.5 Materials for casing and thermal insulation of field joints .33
5.6 Expansion cushions .33
5.6.1 General .33
5.6.2 Materials .34
5.6.3 Stiffness properties . 34
5.6.4 Selecting required thickness of expansion cushions . 35
5.6.5 Marking . 35
5.7 Valves and accessories . 35
5.7.1 General requirements . 35
5.7.2 Marking and documentation . 36
6 Design and calculation . 36
6.1 General procedure . 36
6.2 Pipeline components, areas, conditions and interfaces to be included in the
analyses . 37
6.2.1 Components . 37
6.2.2 Areas requiring specific analyses . 38
6.2.3 Special conditions . 38
6.2.4 Interfaces . 38
6.3 Simplified analysis procedure . 39
6.4 Actions . 39
6.4.1 General . 39
6.4.2 Classification of actions and load combinations . 39
6.4.3 Temperature variations . 41
6.4.4 Top load from soil. 42
6.4.5 Traffic loads . 42
6.5 Global analysis and pipe-soil interaction . 44
6.5.1 General . 44
6.5.2 Modelling pipe-soil interaction . 44
6.5.3 Pipe to soil friction (axial) . 46
6.5.4 Horizontal soil reaction (lateral) . 48
6.5.5 Combined lateral stiffness of steel service pipe, PUR, expansion cushions and soil . 53
6.5.6 Soil properties . 55
6.5.7 Thermal expansion of buried pipe sections: . 55
6.5.8 Pipe systems with single use compensators (SUC’s) . 58
6.5.9 Specific requirements for vertical and horizontal stability . 60
6.5.10 Parallel excavations . 63
6.5.11 Requirements for soft soils and settlement areas . 64
6.5.12 Specific design requirements for above-ground pipelines with factory made pipe
and fitting assemblies . 64
6.5.13 Insertion into protection pipe. 64
6.6 Determination of stresses and strains . 65
6.6.1 General . 65
6.6.2 Cross section analyses, steel . 65
6.6.3 Assessment on the basis of a resultant (equivalent) stress . 66
6.6.4 Stresses and ovalization from top load . 67
6.6.5 Deflection . 69
6.6.6 Bends . 69
6.6.7 T-pieces . 70
6.6.8 Single Use Compensators (SUC’s) . 73
6.6.9 PUR and casing . 74
6.7 Fatigue analyses . 75
6.7.1 General . 75
6.7.2 Action cycles . 75
6.8 Further actions . 77
7 Limit states . 77
7.1 General . 77
7.2 Limit states for service pipes of steel . 78
7.2.1 General .78
7.2.2 Limit state A: Failure caused by plastic deformation .78
7.2.3 Limit state B: Failure caused by fatigue .81
7.2.4 Limit state C: Failure caused by instability of the system or part of it .84
7.2.5 Limit state D: Serviceability limit state .86
7.2.6 Survey of limit states for steel .86
7.3 Limit states for PUR and PE .89
7.3.1 Compressive stress .89
7.3.2 Limit state for shear stress .89
7.3.3 Limit state for PE .89
7.4 Limit states for valves .89
Annex A (normative) Design of piping components under internal pressure .91
A.1 General .91
A.2 Straight pipe and bends .91
A.2.1 Straight pipes .91
A.2.2 Bends .91
A.3 T-pieces and branch connections .92
A.3.1 General aspects and limitations .92
A.3.2 Reinforcement .92
A.3.2.1 General .92
A.3.2.2 Dissimilar material of shell and reinforcement .92
A.3.2.3 Thickness ratio .93
A.3.2.4 Calculation method for reinforcement area .93
A.3.2.5 Reinforcement by increased wall thickness .93
A.3.2.6 Reinforcement by compensating plates.94
A.4 Reducers and extensions .95
A.5 Dished ends .95
A.5.1 General .95
A.5.2 Ellipsoidal Dished Head Minimum required wall thickness for internal pressure .96
A.5.3 Straight cylindrical shells .96
Annex B (informative) Soil properties and geotechnical parameters for pipe/soil
interaction analyses .97
B.1 General requirements .97
B.2 Geotechnical parameters for global analysis (pipe-soil interaction) .97
B.3 Geotechnical Study .98
B.3.1 Field study .98
B.3.2 Typical values, referred to mean value .98
B.3.3 Investigation of interface friction .98
B.4 Characteristic values for soil properties .98
B.4.1 Typical values, referred to mean value .98
B.4.2 Spatial variation of soil properties .99
B.5 Model uncertainty when determining geotechnical parameters. 100
Annex C (informative) Flexibility and stress concentration of pipe components . 102
C.1 General . 102
C.2 Flexibility factors for pipe components. 102
C.2.1 Bends . 102
C.2.2 T-pieces . 102
C.2.3 Other components . 103
C.3 Stress concentration in pipe elements . 103
C.3.1 Butt welds . 103
C.3.2 Bends . 103
C.3.2.1 Stress concentration factors for bends: Simplified method . 103
C.3.2.2 Stress concentration factors for bends: exact calculation . 104
C.3.3 T-pieces . 105
C.3.3.1 General . 105
C.3.4 Small angular deviations . 107
C.3.5 Reducers . 108
Annex D (informative) Calculation of heat losses . 110
D.1 General . 110
D.2 Heat losses of thermal insulated pipes . 110
D.2.1 Pair of single pipes — calculation of specific heat loss . 110
D.2.2 symmetrical and (a) antisymmetrical heat loss factors according to zero-order
multipole formulae: . 111
D.2.3 Using Zero-order approximation for (s) symmetrical and (a) antisymmetrical
problem the heat resistance can be calculated: . 111
D.2.4 specific heat loss of pipes . 112
D.2.5 Twin Pipes — calculation of specific heat loss . 112
D.2.6 temperatures of pipes . 113
D.2.7 (s) symmetrical and (a) antisymmetrical heat loss factors according to first-order
multipole formula: . 114
D.2.8 specific heat loss of pipes . 115
Annex E (informative) Specific requirements for twin pipe systems . 116
E.1 General . 116
E.2 Component and materials . 116
E.2.1 Twin Pipe assembly . 116
E.2.2 Fixing bars . 117
E.3 Max. allowable stresses for specific twin pipe system elements: . 118
E.3.1 Project classes . 118
E.3.2 Soil friction, twin pipe friction length and pipe expansion . 118
E.3.3 Axial stress in the flow and return steel service pipes . 120
E.3.4 Dimensions of the fixing bars . 122
E.3.4.1 General . 122
E.3.4.2 loads on the fixing bars type A . 123
E.3.4.3 loads on the fixing bar type B . 124
E.3.5 Stress proof of the fixing bar . 126
E.3.6 Proof of the welds . 127
E.3.7 Vertical and horizontal stability of the twin pipe assembly in the soil . 129
E.3.8 Stress concentration factors for bends, T-pieces. 129
E.3.9 Fatigue . 129
E.4 Installation requirements . 130
E.4.1 Installation methods: . 130
E.4.2 Straight pipe section terminations: . 130
E.4.3 Use of insulated twin pipe valves: . 130
E.4.4 Use of transition assembly (twin pipe — single pipe): . 130
E.4.5 requirements for welding and testing of steel service pipe joints: . 130
Annex F (normative) Compressive testing of expansion cushions . 131
Annex G (informative) Principles for determination of bending moments and axial forces
for testing of district heating valves . 133
G.1 Introduction . 133
G.2 General considerations for determination of test values for bending moments . 133
G.3 Determination of bending moments from soil settlements . 134
G.4 Calculation results and evaluation . 134
G.5 Resistance to axial forces . 137
Annex H (informative) Scope of EN 13941 in relation to Pressure Equipment Directive
(PED), 2014/68/EU, May 15th, 2014 . 138
H.1 General . 138
H.2 Guidelines . 139
Annex I (informative) Quality control program and documentation . 142
Annex J (informative) Casing: Formulas for Miner Rule . 145
Annex K (informative) Strength calculation of horizontal directional drillings . 147
K.1 Introduction . 147
K.2 Determination of pulling forces . 148
K.2.1 Pulling force, resulting from the roller system . 148
K.2.2 Pulling force, resulting from a straight section of borehole . 148
K.2.3 Pulling force, resulting from curved sections of the borehole . 150
K.2.3.1 General friction force . 150
K.2.3.2 Friction resulting from elastic soil reaction in curved borehole sections . 150
K.2.3.3 Friction due to the axial pulling force in curved borehole sections . 151
K.2.3.4 Total force in a curved section . 152
K.2.4 Total pulling force . 152
K.3 Determination of the longitudinal bending moment . 153
K.4 Determination of the circumferential bending moment from top load. 153
K.5 Determination of stress . 153
K.6 Assessment of possible collapse of the pipeline due to external drilling fluid
pressure or external ground water pressure (risk of buckling) . 153
K.7 Assessment of maximum soil pressure on PUR and casing . 153
K.8 Determination of maximum allowable pressure in the bore hole . 154
K.9 Vertical soil load after completion of horizontal directional drilling (HDD) . 154
K.9.1 Introduction . 154
K.9.2 Arching . 154
K.9.3 Calculation method for vertical soil load (homogeneous soil mass) . 154
K.9.4 Calculation method for horizontal support pressure (with reduced vertical load) 155
Bibliography . 156
European foreword
This document (EN 13941-1:2019) has been prepared by Technical Committee CEN/TC 107
“Prefabricated district heating and district cooling pipe system”, 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.
In comparison to EN 13941:2009+A1:2010, the following changes have been made:
a) EN 13941 is considered to be the “system standard”, including all requirements for materials and
components and where necessary referring to the related product standards
b) chapters related to installation are moved to EN 13941-2;
c) terms and definitions are moved to EN 17248
d) the document structure is improved, giving a better balance between standard text and annexes;
e) twin pipes are included in a new Annex E;
f) Annex H: “Scope of EN 13941 in relation to Pressure Equipment Directive (PED)” was added;
g) requirements for horizontal and vertical stability and for parallel excavations are made more explicit;
h) minimum free distances between parallel pipes are introduced as well as a warning to be aware of
works of third parties that might endanger the integrity or the required design conditions of the
district heating pipes;
i) requirements for horizontal directional drillings are included (also in EN 13941-2);
j) required properties and testing methods for expansion cushions are included;
k) a design fatigue curve for fillet welds (e. g in single use compensators) is included;
l) the use of stress concentration factors for butt welds in district heating pipes is, in line with present
international pipeline codes, not considered necessary anymore;
m) a great number of smaller adjustments and editorial improvements.
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 is 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 1) consists of a main part and eight annexes.
Annexes A, and F are normative. Annexes B, C, D, E, G, H, I, J and K are informative.
This document contains a number of requirements aimed at ensuring the sound execution of distribution
networks and transportation pipelines for district heating.
The requirements and regulations 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 standard.
Some paragraphs of this standard are possibly covered by national regulations in some countries which
NOTE
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 13941-1, form a unity with those of EN 13941-2.
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 document 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 also
bibliographic entry [2].
This standard 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 489-1, District heating pipes — Bonded single and twin pipe systems for directly buried hot water
networks — Casing joint assemblies and thermal insulation for hot water networks in accordance with
EN 13941-1
SIST EN 13941
...
Frequently Asked Questions
SIST EN 13941-1:2019 is a standard 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 1: Design". 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 hot water 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) prEN 13941-1: Design; b) prEN 13941-2: Installation. The requirements and stipulations in this part: EN 13941-1, form an unbreakable unity with those of prEN 13941-2. This part shall therefore exclusively be used in combination with prEN 13941-2. 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. NOTE For further information on water qualities to be used in district heating pipe systems see also [1]. 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 hot water 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) prEN 13941-1: Design; b) prEN 13941-2: Installation. The requirements and stipulations in this part: EN 13941-1, form an unbreakable unity with those of prEN 13941-2. This part shall therefore exclusively be used in combination with prEN 13941-2. 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. NOTE For further information on water qualities to be used in district heating pipe systems see also [1]. This standard is not applicable for such units as: a) pumps; b) heat exchangers; c) boilers, tanks; d) systems behind domestic substations.
SIST EN 13941-1:2019 is classified under the following ICS (International Classification for Standards) categories: 23.040.07 - Pipeline and its parts for district heat; 91.140.10 - Central heating systems. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 13941-1:2019 has the following relationships with other standards: It is inter standard links to SIST EN 13941:2009+A1:2010, SIST EN 13941-1:2019+A1:2022, SIST EN 13941-1:2019/oprA1:2021, SIST EN 13941:2009. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase SIST EN 13941-1:2019 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 SIST standards.
SIST EN 13941-1:2019 표준은 직접 매설되는 온수 네트워크를 위한 단일 및 쌍파이프 시스템의 설계 및 설치를 규정하는 유럽 표준으로써, 이 표준의 범위는 매우 포괄적이며, 여러 가지 온도에서 처리된 온수를 지속적으로 사용할 수 있도록 설계된 공장에서 제조된 열 절연 결합 파이프 시스템의 요구 사항을 명시하고 있습니다. 이 표준은 최대 120 ºC의 온도와 가끔 최대 140 ºC의 피크 온도를 견딜 수 있는 시스템을 지원합니다. 이 표준의 강점 중 하나는 EN 13941-2와의 연계성입니다. EN 13941-1의 요구 사항은 EN 13941-2와 단단한 일체성을 이루므로, 두 파트를 함께 사용함으로써 온수 네트워크의 설계 및 설치 과정에서 일관된 품질을 유지할 수 있습니다. 이 유기적인 구조는 시스템의 신뢰성을 높이고, 열 절연 파이프 시스템의 설계 및 설치에 있어 표준화된 접근방식을 제공합니다. SIST EN 13941-1:2019은 처리된 물 사용을 전제로 함으로써 내부 부식 및 침적물의 효과적인 방지를 보장합니다. 또한, 이 표준은 2.5 MPa 이상의 압력을 가진 열 절연 파이프 시스템에도 적용될 수 있는 원칙을 수립하고 있어, 다양한 응용 분야에 유연하게 대응할 수 있는 가능성을 제공합니다. 설계 및 설치가 불가능한 장비에 대한 명확한 정의를 통해, 사용자들이 이 표준의 적용 한계를 명확히 인지할 수 있도록 하여 실수나 오해를 줄이고 있습니다. SIST EN 13941-1:2019는 이러한 측면에서 지역 난방 파이프 시스템의 설계와 설치에 매우 중요한 기준을 제공하며, 현재의 기술 및 안전 기준에 적합함을 강조하고 있습니다. 이와 같은 이유로 SIST EN 13941-1:2019 표준은 지역 난방 인프라 구축에 있어 필수적으로 고려해야 할 중요한 문서로, 열 절연 파이프 시스템의 설계와 설치 시 필수 기준으로 자리매김하고 있습니다.
Die Norm SIST EN 13941-1:2019 bietet umfassende Anforderungen für das Design und die Installation von wärmegedämmten, gebundenen Einzel- und Doppelrohrsystemen für direkt vergrabene Heizungsnetze. Der Anwendungsbereich dieser europäischen Norm konzentriert sich auf die durchgehende Nutzung von behandeltem Heizwasser bis zu einer maximalen Temperatur von 120 ºC sowie gelegentlich bis zu 140 ºC bei einem maximalen Innendruck von 2,5 MPa. Die klare Fokussierung auf standardisierte Anforderungen ermöglicht eine konsistente Umsetzung in der Branche, gewährleistet jedoch nicht die Anwendung auf flexible Rohrsysteme gemäß EN 15632. Ein herausragendes Merkmal der Norm ist die untrennbare Verbindung zwischen den Teilen prEN 13941-1 (Design) und prEN 13941-2 (Installation), die sicherstellt, dass beide Teile zusammen verwendet werden müssen, um eine reibungslose und normgerechte Umsetzung zu gewährleisten. Dieser integrierte Ansatz maximiert die Effizienz des Designs und reduziert das Risiko von Planungsfehlern. Die Norm adressiert auch die Notwendigkeit, behandeltes Wasser zu verwenden. Der Hinweis auf Methoden wie Enthärtung, Demineralisierung und Entgasung ist besonders wichtig, um interne Korrosion und Ablagerungen zu vermeiden, was für die Langlebigkeit und Effizienz der Heizungsnetze entscheidend ist. Die Berücksichtigung solcher Wasserqualitäten unterstreicht die Relevanz der Norm im Kontext nachhaltiger und wartungsarmer Heizungsinfrastrukturen. Darüber hinaus ermöglicht die Anwendung der festgelegten Prinzipien für Rohre mit höheren Drücken, sofern die Druckeffekte beachtet werden, eine gewisse Flexibilität und Anpassungsfähigkeit der Norm, was in der Praxis von Vorteil ist. Des Weiteren können benachbarte Rohre, die nicht vergraben sind, aber zum Netzwerk gehören, nach dieser Norm entworfen und installiert werden. Allerdings wird klargestellt, dass die Norm nicht für bestimmte Anlagen wie Pumpen, Wärmetauscher, Kessel oder Tanks gilt, was eine gezielte Anwendung der Norm auf die betreffenden Rohrsysteme gewährleistet und Verwirrungen in der Nutzung vermeidet. Insgesamt stellt die SIST EN 13941-1:2019 eine bedeutende Ressource für Fachleute dar, die sich mit dem Design und der Installation von Heizungsnetzen befassen, und bietet einen klaren Rahmen für qualitativ hochwertige und langlebige Lösungen im Bereich der Fernwärmetechnik.
SIST EN 13941-1:2019は、直接埋設型の温水ネットワークのための熱絶縁一体化単管および双管システムの設計に関するヨーロッパ標準であり、設計、計算および設置に関する要件を具体的に定めています。この標準の範囲には、処理された温水を用いた連続運転のためのシステムが含まれ、温度は最大120ºCおよびピーク温度140ºCの条件での運用が可能で、内部圧力は最大2.5 MPaとされています。 SIST EN 13941は二部構成であり、この第1部であるEN 13941-1は設計に関する要件を定めており、これをprEN 13941-2（設置）と組み合わせて使用することが要求されます。この標準は、効率的な内部腐食防止や堆積物対策のために、軟化、脱鉱、脱気、化学物質の添加などによって処理された水の使用を前提としています。 この標準の強みは、明確な要件と構造体の設計ガイドラインを提供することで、ユーザーが直接埋設型の温水供給システムを安全かつ効果的に設計、計画、実施するのを助ける点にあります。また、隣接の管が埋設されていない場合でも、例えばダクト内、バルブ室、道路横断部などのネットワークに属する管の設計や設置に適用可能であることも大きな利点です。 この標準は、特に熱絶縁管システムの圧力が2.5 MPaを超える場合でも、原則が適用できることを示唆しており、圧力の影響に対する特別な配慮が必要であることを強調しています。これにより、より広範な使用が可能となり、ユーザーにとっての実用性が向上しています。 全体として、SIST EN 13941-1:2019は、設計と設置における専門的な要件を包括的に提供し、温水ネットワーク向けの熱絶縁型システムの信頼性と効率性を高める重要な標準であり、業界におけるその意義と関連性はますます高まっています。
SIST EN 13941-1:2019 is a critical document in the field of district heating, specifically focusing on the design and installation of thermal insulated bonded single and twin pipe systems for directly buried hot water networks. The scope of this European Standard meticulously outlines the requirements for systems operating continuously with treated hot water at temperatures up to 120 ºC, with considerations for peak temperatures reaching 140 ºC and internal pressures of up to 2.5 MPa. One of the strengths of this standard is its comprehensive approach to design and installation. By specifying the interplay between the requirements in EN 13941-1 and prEN 13941-2, the document ensures that both design and installation processes are aligned, thus promoting a holistic understanding and application. This alignment enhances the reliability of the heating networks by ensuring that each aspect of the pipeline's lifecycle is adequately addressed. The flexibility of the standard also stands out. While it maintains a focus on traditional bonded pipe systems, it acknowledges that the principles can be applied to systems operating at pressures exceeding 2.5 MPa, provided that due diligence is exercised regarding pressure impacts. This adaptability makes SIST EN 13941-1:2019 relevant to a range of contexts and installations. Importantly, the standard presupposes the use of treated water, which is essential for mitigating internal corrosion and preventing deposits within the pipe systems. This emphasis on water treatment enhances the overall longevity and functionality of the networks established in accordance with these guidelines. However, the document clearly delineates its applicability, stating that it does not cover auxiliary components such as pumps, heat exchangers, boilers, and domestic substations. This focus allows for a concentrated effort on the pipe systems themselves, ensuring that the guidelines are precise and not diluted by peripheral elements. Overall, SIST EN 13941-1:2019 serves as a vital resource for professionals involved in the design and installation of district heating systems, promoting safety, efficiency, and longevity through well-defined parameters tailored for modern applications.
La norme SIST EN 13941-1:2019, intitulée "Pipes de chauffage urbain - Conception et installation de systèmes de tuyaux isolés thermiquement liés, à simple et double tuyau, pour des réseaux d'eau chaude enterrés", présente un cadre essentiel pour la conception des systèmes de tuyauterie utilisés dans les réseaux d'eau chaude enterrés. Son champ d'application englobe des exigences précises concernant la conception, le calcul et l'installation de systèmes de tuyaux fabriqués en usine, garantissant une performance optimale en fonctionnement continu, même à des températures élevées pouvant atteindre 140 ºC et à une pression interne maximale de 2,5 MPa. Cette norme se distingue par plusieurs atouts majeurs. Tout d'abord, elle établit des critères clairs qui peuvent être cruciaux pour éviter les problèmes d'intégrité structurelle et de corrosion interne, en stipulant que l'eau utilisée doit être traitée pour prévenir ces risques. Ainsi, elle favorise la durabilité et l'efficacité des installations de chauffage urbain. De plus, la norme précise que les systèmes de tuyauterie peuvent également être conçus pour des pressions supérieures à 2,5 MPa, à condition que des mesures appropriées soient prises pour gérer les effets de telles pressions, ce qui renforce sa flexibilité et son adaptabilité aux besoins variés des réseaux de chauffage. Un autre point fort de la norme est son approche intégrée, la partie 1 (prEN 13941-1) étant indissociable de la partie 2 (prEN 13941-2), ce qui encourage une cohérence dans la conception et l'installation. Cela contribue à un standard global qui garantit que toutes les étapes du processus, de la conception à l'installation, sont prises en compte de manière exhaustive. L'inclusivité des applications est également un aspect positif, la norme permettant la conception de tuyaux adjacents non enterrés qui font partie du réseau, tels que ceux situés dans des conduits ou au-dessus du sol, ce qui accroît sa pertinence pour des projets d'infrastructure variés. En résumé, la norme SIST EN 13941-1:2019 représente un instrument essentiel pour les professionnels de l'ingénierie et de l'installation dans le domaine du chauffage urbain, apportant des directives claires et précises qui renforcent la sécurité, l'efficacité et la durabilité des systèmes de tuyaux d'eau chaude enterrés. Sa pertinence dans le contexte européen et son impact sur les différentes phases de développement des réseaux de chauffage en font un standard incontournable.
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