SIST EN 253:2009+A1:2014
(Main)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 pričakovanega življenjske dobe pri neprekinjenem delovanju pri različnih temperaturah je navedena v dodatku B.
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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.RG]HPHOMVNDFernwärmerohre - Werkmäßig gedämmte Verbundmantelrohrsysteme für direkt erdverlegte Fernwärmenetze - Verbund-Rohrsystem, bestehend aus Stahl-Mediumrohr, Polyurethan-Wärmedämmung und Außenmantel aus PolyethylenTuyaux 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 polyéthylèneDistrict 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 polyethylene91.140.65Oprema za ogrevanje vodeWater heating equipment23.040.10Železne in jeklene ceviIron and steel pipesICS:Ta slovenski standard je istoveten z:EN 253:2009+A1:2013SIST EN 253:2009+A1:2014en,fr,de01-januar-2014SIST EN 253:2009+A1:2014SLOVENSKI
STANDARDSIST EN 253:20091DGRPHãþD
SIST EN 253:2009+A1:2014
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 253:2009+A1
February 2013 ICS 23.040.10 Supersedes EN 253:2009
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 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
Fernwärmerohre - Werkmäßig gedämmte Verbundmantelrohrsysteme für direkt erdverlegte Fernwärmenetze - Verbund-Rohrsystem, bestehend aus Stahl-Mediumrohr, Polyurethan-Wärmedämmung und Außenmantel aus Polyethylen This European Standard was approved by CEN on 5 December 2008 and includes Amendment 1 approved by CEN on 14 December 2012.
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
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 253:2009+A1:2013: E SIST EN 253:2009+A1:2014
EN 253:2009+A1:2013 (E) 2 Contents page Foreword . 4 Introduction . 5 1 Scope . 6 2 Normative references . 6 3 Terms and definitions . 7 4 Requirements . 9 4.1 General . 9 4.2 Steel service pipe. 9 4.2.1 Specification . 9 4.2.2 Diameter . 10 4.2.3 Wall thickness . 10 4.2.4 Surface condition. 12 4.3 Casing . 12 4.3.1 Material properties . 12 4.3.2 Casing properties . 13 4.4 Polyurethane rigid foam insulation (PUR) . 15 4.4.1 Composition . 15 4.4.2 Voids and bubbles . 15 4.4.3 Compressive strength . 15 4.5 Pipe assembly . 15 4.5.1 General . 15 4.5.2 Pipe ends . 15 4.5.3 Diameter and wall thickness of the casing . 15 4.5.4 Centre line deviation . 16 4.5.5 Expected thermal life and long term temperature resistance . 17 4.5.6 Thermal conductivity in unaged condition . 17 4.5.7 Thermal conductivity at artificially aged condition . 17 4.5.8 Impact resistance. 17 4.5.9 Long term creep resistance and modulus . 17 4.5.10 Surface conditions at delivery . 18 4.5.11 Measuring wires for surveillance systems . 18 5 Test methods . 18 5.1 General conditions and test specimens . 18 5.1.1 General conditions . 18 5.1.2 Test specimens . 18 5.2 Casing . 19 5.2.1 Appearance and surface finish . 19 5.2.2 Elongation at break. 19 5.2.3 Carbon black dispersion, homogeneity . 20 5.2.4 Stress crack resistance test . 20 5.3 Polyurethane rigid foam insulation (PUR) . 21 5.3.1 Composition . 21 5.3.2 Voids and bubbles . 21 5.3.3 Compressive strength . 21 5.4 Pipe assembly . 21 5.4.1 Axial shear strength . 21 5.4.2 Tangential shear strength . 23 5.4.3 Shear strength of the pipe assembly after ageing . 25 5.4.4 Thermal conductivity in unaged condition . 26 5.4.5 Thermal conductivity at artificially aged condition . 26 5.4.6 Impact resistance. 26 5.4.7 Long term creep resistance and modulus at 140 °C . 26 6 Marking . 30 6.1 General . 30 SIST EN 253:2009+A1:2014
EN 253:2009+A1:2013 (E) 3 6.2 Steel service pipe . 30 6.3 Casing . 30 6.4 Pipe assembly . 30 Annex A (informative)
Relation between actual continuous operating conditions and accelerated ageing test conditions . 31 Annex B (informative)
Calculation of the minimum expected thermal life with operation at various temperatures with respect to PUR foam performance . 33 Annex C (normative)
!Calculated Continuous Operating Temperature (CCOT)" . 34 Annex D (informative)
Guidelines for inspection and testing . 37 D.1 General. 37 D.2 Manufacturer's type test . 37 D.3 Manufacturer’s quality control . 37 D.4 External inspection . 37 D.5 Manufacturer's responsibility . 37 Annex E (informative)
Radial creep behaviour of the polyurethane foam (PUR) . 40 Annex F (normative)
Thermal conductivity of pre-insulated pipes - Test procedure . 41 F.1 Scope . 41 F.2 Requirements (EN ISO 8497:1996, Clause 5) . 41 F.2.1 Test specimen (EN ISO 8497:1996, 5.1) . 41 F.2.2 Operating temperature (EN ISO 8497:1996, 5.2) . 41 F.2.3 Types of apparatus (EN ISO 8497:1996, 5.5) . 41 F.3 Apparatus (EN ISO 8497:1996, Clause 7) . 41 F.3.1 Guarded end apparatus . 41 F.3.2 Calibrated end apparatus. 41 F.3.3 Dimensions (EN ISO 8497:1996, 7.2) . 42 F.3.4 Heater pipe surface temperature . 42 F.4 Test specimens (EN ISO 8497:1996, Clause 8) . 42 F.4.1 Conditioning (EN ISO 8497:1996, 8.4) . 42 F.4.2 Dimension measurement (EN ISO 8497:1996, 8.5) . 42 F.4.3 Surface temperature measurement . 42 F.4.4 Location of temperature sensors (EN ISO 8497:1996, 8.6) . 42 F.5 Procedure (EN ISO 8497:1996, Clause 9) . 42 F.5.1 Test length (EN ISO 8497:1996, 9.1.1) . 42 F.5.2 Diameter (EN ISO 8497:1996, 8.5) . 42 F.5.3 Thickness of casing . 43 F.5.4 Ambient requirements (EN ISO 8497:1996, 9.2) . 43 F.5.5 Test pipe temperature (EN ISO 8497:1996, 9.3) . 43 F.5.6 Power supply (EN ISO 8497:1996, 7.9) . 43 F.5.7 Axial heat loss (EN ISO 8497:1996, 5.7) . 43 F.5.8 Test period and stability (EN ISO 8497:1996, 9.5.3) . 43 F.6 Calculations (EN ISO 8497:1996, Clause 11) . 43 F.6.1 Thermal conductivity (EN ISO 8497:1996, 3.5) . 43 F.7 Symbols and units (EN ISO 8497:1996 Clause 4) . 44 Annex G (informative)
National A-deviations . 46 G.1 Swedish national legislative deviations on steel service pipes . 46 Annex H (informative)
Main changes from the previous edition of EN 253 . 47 Annex I (informative)
Waste treatment and recycling . 49 Bibliography . 50 SIST EN 253:2009+A1:2014
EN 253:2009+A1:2013 (E) 4 Foreword This document (EN 253:2009+A1:2013) has been prepared by Technical Committee CEN/TC 107 “Prefabricated district heating 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 August 2013, and conflicting national standards shall be withdrawn at the latest by
August 2013. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document includes Amendment 1, approved by CEN on 2012-12-14. The start and finish of text introduced or altered by amendment is indicated in the text by tags !". This document supersedes !EN 253:2009". Annex H provides details of significant technical changes between this European Standard and the previous editions. 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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 253:2009+A1:2014
EN 253:2009+A1:2013 (E) 5 Introduction This specification is part of the standards for bonded systems using polyurethane foam thermal insulation applied to bond to a steel service pipe and a polyethylene casing. The other standards from CEN/TC 107 covering this subject are: 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 13941, Design and installation of preinsulated bonded pipe systems for district heating; EN 14419, District heating pipes – Preinsulated bonded pipe systems for directly buried hot water networks – Surveillance systems; EN 15698-1, District heating pipes – Preinsulated bonded twin pipe systems for directly buried hot water networks – Part 1: Twin pipe assembly of steel service pipe, polyurethane thermal insulation and outer casing of polyethylene SIST EN 253:2009+A1:2014
EN 253:2009+A1:2013 (E) 6 1 Scope 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. 2 Normative references The following referenced documents are indispensable for the application 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 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 728, Plastics piping and ducting systems – Polyolefin pipes and fittings – Determination of oxidation induction time EN 10204, Metallic products – Types of inspection documents EN 10216-2, Seamless steel tubes for pressure purposes – Technical delivery conditions – Part 2: Non-alloy and alloy steel tubes with specified elevated temperature properties EN 10217-1, Welded steel tubes for pressure purposes – Technical delivery conditions - Part 1: Non-alloy steel tubes with specified room temperature properties EN 10217-2, Welded steel tubes for pressure purposes – Technical delivery conditions – Part 2: Electric welded non-alloy and alloy steel tubes with specified elevated temperature properties EN 10217-5, Welded steel tubes for pressure purposes – Technical delivery conditions – Part 5: Submerged arc welded non-alloy and alloy steel tubes with specified elevated temperature properties EN 10220, Seamless and welded steel tubes – Dimensions and masses per unit length EN 13941, Design and installation of preinsulated bonded pipe systems for district heating EN 14419, District heating pipes – Preinsulated bonded pipe systems for directly buried hot water networks – Surveillance systems EN ISO 1133:2005, Plastics – Determination of the melt mass-flow rate (MFR) and the melt volume-flow rate (MVR) of thermoplastics (ISO 1133:2005) EN ISO 2505, Thermoplastics pipes – Longitudinal reversion – Test methods and parameters (ISO 2505:2005) EN ISO 3126, Plastics piping systems – Plastics components – Determination of dimensions (ISO 3126:2005) EN ISO 8497:1996, Thermal insulation – Determination of steady-state thermal transmission properties of thermal insulation for circular pipes (ISO 8497:1994) SIST EN 253:2009+A1:2014
EN 253:2009+A1:2013 (E) 7 EN ISO 8501-1:2007, Preparation of steel substrates before application of paints and related products – Visual assessment of surface cleanliness – Part 1: Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coatings (ISO 8501-1:2007) EN ISO 9080, Plastics piping and ducting systems – Determination of the long-term hydrostatic strength of thermoplastic materials in pipe form by extrapolation (ISO 9080:2003) EN ISO 9692-1, Welding and allied processes – Recommendations for joint preparation – Part 1: Manual metal-arc welding, gas-shielded metal-arc welding, gas welding, TIG welding and beam welding of steels (ISO 9692-1:2003) EN ISO 12162, Thermoplastics materials for pipes and fittings for pressure applications – Classification and designation – Overall service (design) coefficient (ISO 12162:1995) ISO 844, Rigid cellular plastics – Determination of compression properties ISO 3127:1994, Thermoplastics pipes – Determination of resistance to external blows – Round-the-clock method ISO 6964, Polyolefin pipes and fittings – Determination of carbon black content by calcination and pyrolysis – Test method and basic specification ISO 11414:1996, Plastics pipes and fittings -- Preparation of polyethylene (PE) pipe/pipe or pipe/fitting test piece assemblies by butt fusion ISO 13953, Polyethylene (PE) pipes and fittings – Determination of the tensile strength and failure mode of test pieces from a butt-fused joint ISO 16770, Plastics – Determination of environmental stress cracking (ESC) of polyethylene – Full notch creep test (FNCT) 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 1133:2005 and the following apply. 3.1 ageing keeping the service pipe at a certain, elevated temperature for a certain time while the casing is exposed to a temperature of (23 ± 2) °C 3.2 artificial ageing keeping the complete pipe assembly at a certain, elevated temperature for a certain time 3.3 batch specified quantity of raw material made under the same uniform production conditions in one production run by one manufacturer 3.4 bonded system service pipe, insulating material and casing which are bonded by the insulating material 3.5 calculated continuous operating temperature CCOT temperature for which the thermal life of 30 years can be calculated assuming an Arrhenius relationship between temperature and thermal life SIST EN 253:2009+A1:2014
EN 253:2009+A1:2013 (E) 8 3.6 casing outer layer made of polyethylene to protect the insulation and the service pipe from ground water, moisture and mechanical damage 3.7 centre line deviation deviation between the centre line of the service pipe and the centre line of the casing 3.8 continuous temperature temperature at which the hot water network is designed to operate continuously 3.9 creep slow progressive strain under the influence of stresses 3.10 density mass of a body of a material divided by the volume of the body 3.11 diffusion barrier layer in the pipe assembly of another material than PE, installed between the thermal insulation and the PE casing, with the aim to restrict the diffusion of gases through the casing 3.12 foam density apparent density of the foam of the insulating layer at any position 3.13 fusion compatibility ability of two PE materials to be fused together to form a joint which conforms to the performance requirements of this European Standard 3.14 insulation material material which reduces the heat loss 3.15 Polymeric Methylendiphenyl Diisocyanate-Index MDI-index quotient of the actual amount of isocyanate used and the stoichiometrically required amount, multiplied by 100 3.16 peak temperature highest temperature at which a system is designed to operate occasionally, see Annex B 3.17 physical blowing agent additive in the mixture of isocyanate and polyole which evaporate without reacting during the polymerisations 3.18 pipe assembly assembled product, consisting of a service pipe, insulating material and a casing SIST EN 253:2009+A1:2014
EN 253:2009+A1:2013 (E) 9 3.19 polyurethane rigid foam PUR material resulting from the chemical reaction of polyisocyanates with hydroxyl containing compounds in the presence of catalysts having mainly closed cell structure NOTE: The foaming can be assisted by a physical blowing agent 3.20 service pipe steel pipe that contains the water 3.21 shear strength ability of the pipe assembly to withstand a shear force acting between the casing and the service pipe 3.22 thermal life time elapsed before the tangential shear stress at 140 °C falls below 0,13 MPa when exposing the pipe continu-ously to the ageing temperature NOTE The limit value for the tangential shear strength, 0,13 MPa, used in the definition of the thermal life is clearly higher than the shear strength level necessary in service. As a consequence the useful service life of the
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