EN 253:2009+A2:2015
(Main + Amendment)District heating pipes - Preinsulated bonded pipe systems for directly buried hot water networks - Pipe assembly of steel service pipe, polyurethane thermal insulation and outer casing of polyethylene
District heating pipes - Preinsulated bonded pipe systems for directly buried hot water networks - Pipe assembly of steel service pipe, polyurethane thermal insulation and outer casing of polyethylene
This European Standard specifies requirements and test methods for straight lengths of prefabricated thermally insulated pipe-in-pipe assemblies for directly buried hot water networks, comprising a steel service pipe from DN 15 to DN 1200, rigid polyurethane foam insulation and an outer casing of polyethylene. The pipe assembly may also include the following additional elements: measuring wires, spacers and diffusion barriers.
This standard applies only to insulated pipe assemblies, for continuous operation with hot water at various temperatures up to 120 °C and occasionally with a peak temperature up to 140 °C.
The estimation of expected thermal life with continuous operation at various temperatures is outlined in Annex B.
Fernwärmerohre - Werkmäßig gedämmte Verbundmantelrohrsysteme für direkt erdverlegte Fernwärmenetze - Verbund-Rohrsystem bestehend aus Stahl-Mediumrohr, Polyurethan-Wärmedämmung und Außenmantel aus Polyethylen
Diese Europäische Norm legt Anforderungen und Prüfverfahren für vorgefertigte, gerade wärmegedämmte Rohr in Rohr Systeme für direkt erdverlegte Fernwärmenetze fest, die aus einem Stahl-Mediumrohr von DN 15 bis DN 1200 mit Wärmedämmung aus Polyurethan Hartschaumstoff und einer Ummantelung aus Polyethylen bestehen. Das Verbund Rohrsystem darf darüber hinaus folgende Bauteile umfassen: Mess¬drähte, Abstandshalter und Diffusionsbarrieren.
Diese Norm gilt nur für wärmegedämmte Verbund Rohrsysteme für den Dauerbetrieb mit Warmwasser bei unterschiedlichen Betriebstemperaturen von bis zu 120 °C und gelegentlich auftretenden Spitzen¬temperaturen von bis zu 140 °C.
Die Abschätzung der erwarteten thermischen Lebensdauer bei Dauerbetrieb mit unterschiedlichen Betriebs-temperaturen ist in Anhang B erläutert.
Tuyaux de chauffage urbain - Systèmes bloqués de tuyaux préisolés pour les réseaux d'eau chaude enterrés directement - Tube de service en acier, isolation thermique en polyuréthane et tube de protection en polyéthylène
La présente Norme européenne définit les prescriptions et les méthodes d’essai applicables aux longueurs droites de systèmes préfabriqués de tuyaux isolés thermiquement pour réseaux d’eau chaude enterrés directement comprenant un tube de service en acier de DN 15 à DN 1200, une isolation en mousse rigide de polyuréthane et un tube de protection en polyéthylène. Le tuyau préisolé peut également comprendre les éléments supplémentaires suivants : les câbles de mesure, les entretoises et les barrières anti diffusion.
La présente Norme s’applique uniquement aux systèmes isolés par mousse de polyuréthane utilisés pour l’eau chaude à différentes températures pouvant aller en service continu jusqu'à 120 °C et, parfois, à une température de pointe pouvant atteindre 140 °C.
L’estimation de la durée de vie thermique escomptée de systèmes opérant à différentes températures en service continu est donnée à l’Annexe B.
Cevi za daljinsko ogrevanje - Izolirani vezani cevni sistemi za podzemeljska toplovodna omrežja - Cevni sestav iz jeklene cevi, poliuretanske toplotne izolacije in zunanjega polietilenskega plašča
Ta evropski standard določa zahteve in preskusne metode za ravne odseke predizdelanih toplotno izoliranih cevnih sestavov za podzemeljska toplovodna omrežja, sestavljene iz jeklene cevi velikosti od DN 15 do DN 1200, izolacije iz trdne poliuretanske pene in zunanjega polietilenskega plašča. Cevni sestav lahko vključuje tudi naslednje dodatne elemente: merilne žice, distančnike in difuzijske pregrade.
Ta standard se uporablja samo za izolirane cevne sestave za neprekinjeno delovanje s toplo vodo pri različnih temperaturah do 120 °C, včasih pa tudi z najvišjo temperaturo do 140 °C.
Ocena pričakovane življenjske dobe pri neprekinjenem delovanju pri različnih temperaturah je navedena v dodatku B.
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Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2015
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District heating pipes - Preinsulated bonded pipe systems for directly buried hot water
networks - Pipe assembly of steel service pipe, polyurethane thermal insulation and
outer casing of polyethylene
Fernwärmerohre - Werkmäßig gedämmte Verbundmantelrohrsysteme für direkt
erdverlegte Fernwärmenetze - Verbund-Rohrsystem, bestehend aus Stahl-Mediumrohr,
Polyurethan-Wärmedämmung und Außenmantel aus Polyethylen
Tuyaux de chauffage urbain - Systèmes bloqués de tuyaux préisolés pour les réseaux
d'eau chaude enterrés directement - Tube de service en acier, isolation thermique en
polyuréthane et tube de protection en polyéthylène
Ta slovenski standard je istoveten z: EN 253:2009+A2:2015
ICS:
23.040.07 Cevovodi za daljinsko Pipeline and its parts for
ogrevanje in njihovi deli district heat
23.040.10 Železne in jeklene cevi Iron and steel pipes
91.140.65 Oprema za ogrevanje vode Water heating equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 253:2009+A2
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2015
EUROPÄISCHE NORM
ICS 23.040.10 Supersedes EN 253:2009+A1:2013
English Version
District heating pipes - Preinsulated bonded pipe systems
for directly buried hot water networks - Pipe assembly of
steel service pipe, polyurethane thermal insulation and
outer casing of polyethylene
Tuyaux de chauffage urbain - Systèmes bloqués de Fernwärmerohre - Werkmäßig gedämmte
tuyaux préisolés pour les réseaux d'eau chaude Verbundmantelrohrsysteme für direkt erdverlegte
enterrés directement - Tube de service en acier, Fernwärmenetze - Verbund-Rohrsystem, bestehend
isolation thermique en polyuréthane et tube de aus Stahl-Mediumrohr, Polyurethan-Wärmedämmung
protection en polyéthylène und Außenmantel aus Polyethylen
This European Standard was approved by CEN on 14 December 2012 and includes Amendment 2 approved by CEN on 17 July
2015.
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, 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: Avenue Marnix 17, B-1000 Brussels
© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 253:2009+A2:2015 E
worldwide for CEN national Members.
Contents Page
European foreword . 5
Introduction . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Requirements . 10
4.1 General . 10
4.2 Steel service pipe . 11
4.2.1 Specification . 11
4.2.2 Diameter . 11
4.2.3 Wall thickness . 12
4.2.4 Surface condition . 13
4.3 Casing. 14
4.3.1 Material properties . 14
4.3.2 Casing properties . 14
4.4 Polyurethane rigid foam insulation (PUR) . 16
4.4.1 Composition . 16
4.4.2 Cell structure . 16
4.4.3 Compressive strength . 16
4.4.4 Foam density . 16
4.4.5 Water absorption at elevated temperature . 16
4.5 Pipe assembly . 17
4.5.1 General . 17
4.5.2 Pipe ends . 17
4.5.3 Diameter and wall thickness of the casing . 17
4.5.4 Centre line deviation . 18
4.5.5 Expected thermal life and long term temperature resistance . 18
4.5.6 Thermal conductivity in unaged condition. 18
4.5.7 Thermal conductivity at artificially aged condition . 19
4.5.8 Impact resistance . 19
4.5.9 Long term creep resistance and modulus . 19
4.5.10 Surface conditions at delivery . 19
4.5.11 Measuring wires for surveillance systems . 19
5 Test methods . 19
5.1 General conditions and test specimens . 19
5.1.1 General conditions . 19
5.1.2 Test specimens . 19
5.2 Casing. 20
5.2.1 Appearance and surface finish . 20
5.2.2 Elongation at break . 20
5.2.3 Carbon black dispersion, homogeneity . 21
5.2.4 Stress crack resistance test . 21
5.3 Polyurethane rigid foam insulation (PUR) . 22
5.3.1 Composition . 22
5.3.2 Cell structure . 22
5.3.3 Compressive strength . 22
5.3.4 5.3.4 Foam density . 23
5.3.5 5.3.5 Water absorption . 23
5.4 Pipe assembly . 23
5.4.1 Axial shear strength . 23
5.4.2 Tangential shear strength . 25
5.4.3 Shear strength of the pipe assembly after ageing . 27
5.4.4 Thermal conductivity in unaged condition . 27
5.4.5 Thermal conductivity at artificially aged condition . 27
5.4.6 Impact resistance. 27
5.4.7 Long term creep resistance and modulus at 140 °C . 27
6 Marking . 30
6.1 General . 30
6.2 Steel service pipe . 30
6.3 Casing . 30
6.4 Pipe assembly . 31
Annex A (informative) Relation between actual continuous operating conditions and
accelerated ageing test conditions . 32
Annex B (informative) Calculation of the minimum expected thermal life with operation at
various temperatures with respect to PUR foam performance . 34
Annex C (normative) !Calculated Continuous Operating Temperature (CCOT)". 35
C.1 General .
...
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