1、December 2015 English price group 20No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 23.040.10!%Jl“2399673www.din.de
2、DIN EN 253District 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;English version EN 253:2009+A2:2015,English translation of DIN EN 253:2015-12Fernwrmerohre We
3、rkmig gedmmte Verbundmantelrohrsysteme fr direkt erdverlegte Fernwrmenetze Verbund-Rohrsystem, bestehend aus Stahl-Mediumrohr, Polyurethan-Wrmedmmung und Auenmantel aus Polyethylen;Englische Fassung EN 253:2009+A2:2015,Englische bersetzung von DIN EN 253:2015-12Tuyaux de chauffage urbain Systmes blo
4、qus de tuyaux prisols pour les rseaux deau chaude enterrs directement Tube de service en acier, isolation thermique en polyurthane et tube de protection en polythylne;Version anglaise EN 253:2009+A2:2015,Traduction anglaise de DIN EN 253:2015-12SupersedesDIN EN 253:2013-05www.beuth.deDTranslation by
5、 DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.Document comprises 55 pages 12.15 DIN EN 253:2015-12 2 A comma is used as the decimal marker. National foreword This document (EN 253:2009+A2:2015) has been prepared by Technical Committee CEN/TC 107
6、 “Prefabricated district heating pipe systems” (Secretariat: DS, Denmark). The responsible German body involved in its preparation was DIN-Normenausschuss Heiz- und Raumlufttechnik (DIN Standards Committee Heating and Ventilation Technology ), Working Committee NA 041-01-12 AA Werksmig gedmmte Mante
7、lrohre fr Fernwrme (SpA CEN/TC 107). Amendments This standard differs from DIN EN 253:2013-05 as follows: a) Subclause 4.2.1 “Specification”, including Table 1 “Steel service pipe specification”, has been revised; b) Subclause 4.4.2 “Cell structure” has been revised; c) Subclauses 4.4.4 “Foam densit
8、y” and 4.4.5 “Water absorption at elevated temperature” specifying new test requirements for polyurethane rigid foam insulation have been added; d) the test requirements for pipe assemblies specified in Subclauses 4.5.6 “Thermal conductivity in unaged condition” and 4.5.7 “Thermal conductivity at ar
9、tificially aged condition” have been revised; e) in Subclauses 5.1.2.4 and 5.1.2.5, new requirements for test specimens have been specified; f) Subclauses 5.3.2 “Cell structure”, 5.3.3 “Compressive strength”, 5.3.4 “Foam density”, and 5.3.5 “Water absorption” have been revised; g) in Annex D “Guidel
10、ines for inspection and testing”, Table D.3 “Polyurethane foam insulation (PUR) inspection” has been revised. Previous editions DIN EN 253: 1994-12, 2003-06, 2006-02, 2009-07, 2013-05 DIN EN 253/A2: 2007-01 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 253:2009+A2 October 2015 ICS 23.040.10 S
11、upersedes EN 253:2009+A1:2013English 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 - Systmes bloqus de tuyaux
12、prisols pour les rseaux deau chaude enterrs directement - Tube de service en acier, isolation thermique en polyurthane et tube de protection en polythylne Fernwrmerohre - Werkmig gedmmte Verbundmantelrohrsysteme fr direkt erdverlegte Fernwrmenetze - Verbund-Rohrsystem, bestehend aus Stahl-Mediumrohr
13、, Polyurethan-Wrmedmmung und Auenmantel 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 Eu
14、ropean 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 versi
15、ons (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,
16、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, Sw
17、itzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR 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 worldwide for CEN natio
18、nal Members. Ref. No. EN 253:2009+A2:2015 EEN 253:2009+A2:2015 (E) 2 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 Wal
19、l 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 tempe
20、rature . 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
21、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.
22、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 DIN EN 253:2
23、015-12 EN 253:2009+A2:2015 (E) 3 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 u
24、naged 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 betwe
25、en 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 (
26、CCOT)“ 35 C.1 General 35 C.2 Principle 35 C.3 Symbols . 35 C.4 Ageing and shear strength determinations . 36 C.5 Calculations . 36 C.5.1 Determination of the thermal life at different ageing temperatures . 36 C.5.2 Adoption to the Arrhenius relation. 36 C.5.3 Calculated continuous operating temperat
27、ure, CCOT 37 Annex D (informative) Guidelines for inspection and testing 38 D.1 General 38 D.2 Manufacturers type test . 38 D.3 Manufacturers quality control . 38 D.4 External inspection . 38 D.5 Manufacturers responsibility 38 Annex E (informative) Radial creep behaviour of the polyurethane foam (P
28、UR) . 42 Annex F (normative) Thermal conductivity of pre-insulated pipes - Test procedure 43 F.1 Scope 43 F.2 Requirements (EN ISO 8497:1996, Clause 5) . 43 F.2.1 Test specimen (EN ISO 8497:1996, 5.1) . 43 F.2.2 Operating temperature (EN ISO 8497:1996, 5.2) . 43 F.2.3 Types of apparatus (EN ISO 8497
29、:1996, 5.5) . 43 DIN EN 253:2015-12 EN 253:2009+A2:2015 (E) 4 F.3 Apparatus (EN ISO 8497:1996, Clause 7) 43 F.3.1 Guarded end apparatus 43 F.3.2 Calibrated end apparatus . 43 F.3.3 Dimensions (EN ISO 8497:1996, 7.2) . 44 F.3.4 Heater pipe surface temperature 44 F.4 Test specimens (EN ISO 8497:1996,
30、Clause 8). 44 F.4.1 Conditioning (EN ISO 8497:1996, 8.4) . 44 F.4.2 Dimension measurement (EN ISO 8497:1996, 8.5) 44 F.4.3 Surface temperature measurement . 44 F.4.4 Location of temperature sensors (EN ISO 8497:1996, 8.6) 44 F.5 Procedure (EN ISO 8497:1996, Clause 9) 44 F.5.1 Test length (EN ISO 849
31、7:1996, 9.1.1) . 44 F.5.2 Diameter (EN ISO 8497:1996, 8.5) 44 F.5.3 Thickness of casing . 44 F.5.4 Ambient requirements (EN ISO 8497:1996, 9.2) . 45 F.5.5 Test pipe temperature (EN ISO 8497:1996, 9.3) 45 F.5.6 Power supply (EN ISO 8497:1996, 7.9) 45 F.5.7 #Axial heat loss$ 45 F.5.8 Test period and s
32、tability (EN ISO 8497:1996, 9.5.3) . 45 F.6 Calculations (EN ISO 8497:1996, Clause 11). 45 F.6.1 Thermal conductivity (EN ISO 8497:1996, 3.5) 45 F.7 Symbols and units (EN ISO 8497:1996 Clause 4) 46 Annex G (informative) National A-deviations 48 G.1 Swedish national legislative deviations on steel se
33、rvice pipes 48 Annex H (informative) Main changes from the previous edition of EN 253 . 49 Annex I (informative) Waste treatment and recycling . 52 Bibliography 53 DIN EN 253:2015-12 EN 253:2009+A2:2015 (E) 5 European foreword This document (EN 253:2009+A2:2015) has been prepared by Technical Commit
34、tee 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 April 2016, and conflicting national standards
35、 shall be withdrawn at the latest by April 2016. 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, a
36、pproved by CEN on 2012-12-14, and Amendment 2, approved by CEN on 2015-07-17. The start and finish of text introduced or altered by amendment is indicated in the text by tags !“ and #$. This document supersedes #EN 253:2009+A1:2013$. Annex H provides details of significant technical changes between
37、this European Standard and the previous editions. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland,
38、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. DIN EN 253:2015-12 EN 253:2009+A2:201
39、5 (E) 6 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
40、 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 ste
41、el 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 1394
42、1, 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 bu
43、ried hot water networks Part 1: Twin pipe assembly of steel service pipe, polyurethane thermal insulation and outer casing of polyethylene DIN EN 253:2015-12 EN 253:2009+A2:2015 (E) 7 1 Scope This European Standard specifies requirements and test methods for straight lengths of prefabricated thermal
44、ly 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 a
45、nd 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
46、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
47、 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 oxi
48、dation 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 purp
49、oses 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 we
