BS EN 253-2009 District heating pipes — Preinsulated bonded pipe systems for directly buried hot water networks.pdf
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1、? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? BS EN 253:2009 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 253 January 2009 ICS 23.040.10Supersedes EN 253:2003 English Version District heating pipes - Preinsulated bonded pipe systems for directly buried hot water net
2、works - Pipe assembly of steel service pipe, polyurethane thermal insulation and outer casing of polyethylene Tuyaux de chauffage urbain - Systmes bloqus de tuyaux prisols pour les rseaux deau chaude enterrs directement - Tube de service en acier, isolation thermique en polyurthane et tube de protec
3、tion en polythylne Fernwrmerohre - Werkmig gedmmte Verbundmantelrohrsysteme fr direkt erdverlegte Fernwrmenetze - Verbund-Rohrsystem bestehend aus Stahl-Mediumrohr, Polyurethan-Wrmedmmung und Auenmantel aus Polyethylen This European Standard was approved by CEN on 5 December 2008. CEN members are bo
4、und 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
5、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 translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same st
6、atus as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Roman
7、ia, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2009 CENAll rights of exploitation in any form and by any means reserved
8、worldwide for CEN national Members. Ref. No. EN 253:2009: E BS EN 253:2009 EN 253:2009 (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?Diam
9、eter 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.
10、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 cond
11、ition 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 1
12、8? 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 s
13、trength . 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 resist
14、ance. 26? 5.4.7?Long term creep resistance and modulus at 140 C 26? 6?Marking . 30? ? BS EN 253:2009 EN 253:2009 (E) 3 6.1?General 30? 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 agein
15、g 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? C.1?General 34? C.2?Symbols 34? C.3?Ageing and s
16、hear strength determinations 34? C.4?Calculations . 35? C.4.1?Determination of the thermal life at different ageing temperatures . 35? C.4.2?Adoption to the Arrhenius relation 35? C.4.3?Calculated continuous operating temperature, CCOT 35? Annex D (informative) Guidelines for inspection and testing
17、37? D.1?General 37? D.2?Manufacturers type test . 37? D.3?Manufacturer s quality control . 37? D.4?External inspection 37? D.5?Manufacturers responsibility . 37? Annex E (informative) Radial creep behaviour of the polyurethane foam (PUR) . 40? Annex F (normative) Thermal conductivity of pre-insulate
18、d 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
19、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
20、8497:1996, 8.5) . 42? F.4.3?Surface temperature measurement . 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?Te
21、st 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
22、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 tr
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