1、BS EN15698-1:2009ICS 23.040.10NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDDistrict heating pipes Preinsulated bondedtwin pipe systems fordirectly buried hotwater networksPart 1: Twin pipe assembly of steelservice pipe, polyurethane thermalinsulation and oute
2、r casing ofpolyethyleneThis British Standardwas published under theauthority of the StandardsPolicy and StrategyCommittee on 31 January2009 BSI 2009ISBN 978 0 580 58925 6Amendments/corrigenda issued since publicationDate CommentsBS EN 15698-1:2009National forewordThis British Standard is the UK impl
3、ementation of EN 15698-1:2009.The UK participation in its preparation was entrusted to TechnicalCommittee RHE/9, Insulated underground pipelines.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the neces
4、sary provisionsof a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.BS EN 15698-1:2009EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 15698-1January 2009ICS 23.040.10English VersionDistrict heating pipes -
5、Preinsulated bonded twin pipe systemsfor directly buried hot water networks - Part 1: Twin pipeassembly of steel service pipe, polyurethane thermal insulationand outer casing of polyethyleneTuyaux de chauffage urbain - Systmes bloqus de bitubesprisols pour les rseaux deau chaude enterrsdirectement -
6、 Partie 1: Assemblage de bitubes pour tube deservice en acier, isolation thermique en polyurthane ettube de protection en polythylneFernwrmerohre - Werkmig gedmmteVerbundmanteldoppelrohre fr direkt erdverlegteFernwrmenetze - Teil 1: Verbund-Doppelrohrsystembestehend aus zwei Stahl-Mediumrohren, Poly
7、urethan-Wrmedmmung und einem Auenmantel aus PolyethylenThis European Standard was approved by CEN on 5 December 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any
8、 alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN 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
9、translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germa
10、ny, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManag
11、ement Centre: rue de Stassart, 36 B-1050 Brussels 2009 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 15698-1:2009: EBS EN 15698-1:2009EN 15698-1:2009 (E) 2 Contents page Foreword 3 Introduction . 4 1 Scope 5 2 Normative references
12、5 3 Terms and definitions . 5 4 Requirements . 5 4.1 General 5 4.2 Steel service pipe. 5 4.3 Material, casing properties and dimensions . 6 4.4 Polyurethane rigid foam insulation (PUR) 6 4.5 Pipe assembly 6 4.5.1 End alignment of forward and return service pipes. 6 4.5.2 Distance between forward and
13、 return service pipes . 6 4.5.3 Twisting of service pipes 7 4.5.4 Centre line deviation . 8 4.5.5 Pipe ends 9 4.5.6 Axial shear strength 9 4.5.7 Expected thermal life and long term temperature resistance . 9 4.5.8 Thermal conductivity in unaged condition . 9 4.5.9 Impact resistance. 9 4.5.10 Long te
14、rm creep resistance and modulus 9 4.5.11 Surface conditions at delivery 9 4.5.12 Measuring wires for surveillance systems . 9 5 Test methods 9 5.1 General 9 5.2 Test specimens 9 5.3 Casing . 10 5.4 Polyurethane rigid foam insulation (PUR) 10 5.5 Pipe assembly 10 5.5.1 Axial shear strength 10 5.5.2 E
15、xpected thermal life and long term temperature resistance . 13 5.5.3 Thermal conductivity in unaged condition . 13 5.5.4 Thermal transmittance 13 5.5.5 Impact resistance. 13 5.5.6 Creep behaviour at 140 C 13 6 Marking . 13 Annex A (informative) Guidelines for inspection and testing 14 Annex B (infor
16、mative) Calculation of thermal transmittance. 15 Annex C (informative) Waste treatment and recycling 17 Bibliography 18 BS EN 15698-1:2009EN 15698-1:2009 (E) 3 Foreword This document (EN 15698-1:2009) has been prepared by Technical Committee CEN/TC 107 “Prefabricated district heating pipe systems”,
17、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 July 2009, and conflicting national standards shall be withdrawn at the latest by July 2009. Attention is dr
18、awn 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. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the follow
19、ing countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slove
20、nia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 15698-1:2009EN 15698-1:2009 (E) 4 Introduction This specification is part of the standards for bonded systems using polyurethane foam thermal insulation applied to bond to two steel service pipes and a polyethylene casing. This standard h
21、as been elaborated as a complement to the standards for bonded systems using polyurethane foam thermal insulation applied to bond to one steel service pipe and a polyethylene casing. These standards are: EN 253, District heating pipes Preinsulated bonded pipe systems for directly buried hot water ne
22、tworks 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 ca
23、sing 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
24、 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 syst
25、ems for directly buried hot water networks Surveillance systems. Waste management and recycling of materials is dealt with in Annex C. BS EN 15698-1:2009EN 15698-1:2009 (E) 5 1 Scope This European Standard for District Heating Twin Pipes, specifies requirements and test methods for straight lengths
26、of prefabricated thermally insulated pipe-in-pipe assemblies for directly buried hot water networks, comprising two steel service pipes from DN 15 to DN 250, rigid polyurethane foam insulation and one cylindrical outer casing of polyethylene. The pipe assembly may also include the following addition
27、al elements: Measuring wires, spacers and diffusion barriers. This standard applies only to insulated twin 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 c
28、ontinuous operation at various temperatures is outlined in Annex B of EN 253. 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 refe
29、renced document (including any amendments) applies. EN 253:2009, 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 EN ISO 3126, Plastics piping systems -
30、 Plastics components - Determination of dimensions (ISO 3126:2005) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 253:2009 and the following apply. 3.1 single pipe assembly technical solution of district heating pipes with one steel service pipe in o
31、ne casing 3.2 twin pipe assembly technical solution of district heating pipes with two steel service pipes in one casing 3.3 twisting of service pipes tendency of the service pipes of a twin pipe assembly to twist around each other 4 Requirements 4.1 General Unless otherwise specified, the requireme
32、nts shall be valid for each single measurement. For information on suitable guidelines for inspection of manufactured preinsulated twin pipes see Annex A. 4.2 Steel service pipe Material, dimensions, tolerances and surface condition of the steel service pipes shall be as specified in EN 253. BS EN 1
33、5698-1:2009EN 15698-1:2009 (E) 6 4.3 Material, casing properties and dimensions Material and casing properties shall be as specified in EN 253. For the casing diameters specified in Table 1 the dimensions of the casing shall be as specified in EN 253. The maximum out-of-roundness shall conform to Ta
34、ble 1 and be measured in accordance with EN ISO 3126. Table 1 Casing diameters Nominal diameter of service pipes DN Casing diameter, insulation series1 Dc minCasing diameter, insulation series 2 Dc minCasing diameter, insulation series 3 Dc minMaximum out- of-roundness mm mm mm mm 15 20 25 32 125 12
35、5 140 160 140 140 160 180 160 160 180 200 1,2 1,2 1,2 1,3 40 50 65 160 200 225 180 225 250 200 250 280 1,4 1,4 1,5 80 100 125 250 315 400 280 355 450 315 400 500 1,6 2,0 2,5 150 200 250 450 560 710 500 630 800 560 710 900 3,0 4,0 5,0 4.4 Polyurethane rigid foam insulation (PUR) Material and insulati
36、on properties shall be as specified in EN 253. 4.5 Pipe assembly 4.5.1 End alignment of forward and return service pipes The alignment of the ends of the forward and return service pipes shall not differ more than 1 mm when measured in the longitudinal direction. 4.5.2 Distance between forward and r
37、eturn service pipes The distance between forward and return service pipes shall be in accordance with Table 2. The tolerance of the distance between the forward and return service pipes, Lp, is 1 mm when measured in the pipe ends and 2 mm when measured at any point inside the twin pipe assembly, see
38、 Figure 1. BS EN 15698-1:2009EN 15698-1:2009 (E) 7 Table 2 Distance between service pipes Nominal diameter of service pipes DN Distance between service pipes Lpmm 15 20 25 32 19 19 19 19 40 50 65 19 20 20 80 100 125 25 25 30 150 200 250 40 45 45 4.5.3 Twisting of service pipes The twisting, w, of th
39、e service pipes in one end of the twin pipe assembly in relation to the other end shall be maximum 3 mm. The twisting, w, of the service pipes in any end of the pipe assembly in relation to any point inside the pipe assembly shall be maximum 6 mm. For cut pipes the twisting, w, shall be maximum 3 mm
40、, see Figure 1. BS EN 15698-1:2009EN 15698-1:2009 (E) 8 Key 1 forward service pipe 2 return service pipe 3 casing 4 insulation 5 service pipe at maximum twisting, wmaxLpdistance between service pipes w twisting Figure 1 Twisting, w, and distance between service pipes, Lp4.5.4 Centre line deviation T
41、he distance between the common centre line of the service pipes and the centre line of the casing at any point shall not exceed the limits given in Table 3. Table 3 Centre line deviation related to nominal diameters Nominal outside diameter of casing mm Maximum centre line deviation mm 75 to 160 180
42、 to 400 450 to 630 710 to 800 3,0 5,0 8,0 10,0 BS EN 15698-1:2009EN 15698-1:2009 (E) 9 4.5.5 Pipe ends The pipe ends shall be in accordance with EN 253. 4.5.6 Axial shear strength When measured in accordance with 5.5.1.4 and 5.5.1.5 the axial shear strength on each service pipe shall fulfil the requ
43、irement in EN 253. 4.5.7 Expected thermal life and long term temperature resistance When tested in accordance with 5.5.2 the expected thermal life and long term temperature resistance shall be in accordance with EN 253. 4.5.8 Thermal conductivity in unaged condition When tested in accordance with 5.
44、5.3 the thermal conductivity in unaged condition shall be in accordance with EN 253. The thermal conductivity in unaged condition shall be used to calculate the thermal transmittance as described in 5.5.4. 4.5.9 Impact resistance When determined in accordance with 5.5.5 the impact resistance shall b
45、e in accordance with EN 253. 4.5.10 Long term creep resistance and modulus When tested in accordance with 5.5.6 the creep behaviour shall be in accordance with EN 253. 4.5.11 Surface conditions at delivery The surface conditions at delivery shall be in accordance with EN 253. 4.5.12 Measuring wires
46、for surveillance systems Measuring wires, if any, shall comply with the requirements of EN 14419. 5 Test methods 5.1 General Where test requirements specified in this standard differ from those in other standards referred to, the requirements laid down in this European Standard shall apply. All test
47、 specimens shall be representative for the production. 5.2 Test specimens Test specimens shall be taken in accordance with EN 253 except for the position of test specimens for compressive strength that shall be as shown in Figure 2. BS EN 15698-1:2009EN 15698-1:2009 (E) 10 Key 1 forward service pipe
48、 2 return service pipe 3 casing 4 insulation 5 areas where the test specimens shall be taken Figure 2 Areas for test specimens 5.3 Casing The casing shall be tested in accordance with EN 253. 5.4 Polyurethane rigid foam insulation (PUR) The polyurethane rigid foam insulation shall be tested in accor
49、dance with EN 253. 5.5 Pipe assembly 5.5.1 Axial shear strength 5.5.1.1 Test specimen The test specimen shall be a length of pipe assembly of 200 mm. The test specimen shall be cut perpendicular to the axis of the pipes and be taken in accordance with EN 253:2009, 5.1.2.2 and in the middle of the pipe. BS EN 15698-1:2009EN 15698-1:2009 (E) 11 5.5.1.2 Test procedure An axial force shall be applied to one service pipe at a time. The speed of the testing machine shall be 5 mm/min. The axial force shall be recorded and th
