1、February 2016 English price group 14No 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 23.060.01!%LF“2413561www.din.de
2、DIN EN 488District 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;English version EN 488:2015,English translation of DIN EN 488:2016-02Fernwrmerohre W
3、erkmig gedmmte Verbundmantelrohrsysteme fr direkt erdverlegte Fernwrmenetze Vorgedmmte Absperrarmaturen fr Stahlmediumrohre mit Polyurethan-Wrmedmmung und Auenmantel aus Polyethylen;Englische Fassung EN 488:2015,Englische bersetzung von DIN EN 488:2016-02Tuyaux de chauffage urbain Systmes bloqus de
4、tuyaux prisols pour les rseaux deau chaude enterrs directement Robinets prisols pour tubes de service en acier, isolation thermique en polyurthane et tubede protection en polythylne;Version anglaise EN 488:2015,Traduction anglaise de DIN EN 488:2016-02SupersedesDIN EN 488:2014-05www.beuth.deDocument
5、 comprises 31 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.01.16DIN EN 488:2016-02 2 A comma is used as the decimal marker. National foreword This document (EN 488:2015) has been prepared by Technical Committee CEN/TC 107 “P
6、refabricated district heating and district cooling 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 Werk
7、smig gedmmte Mantelrohre fr Fernwrme (SpA CEN/TC 107). Amendments This standard differs from DIN EN 488:2014-05 as follows: a) the type test of the steel valve has been improved and simplified. The cycle test has been integrated in the test sequence; b) the formulae in Annex C for the calculation of
8、 bending forces have been improved; c) the standard has been harmonized with EN 448 and other relevant European Standards. Previous editions DIN EN 488: 1994-12, 2003-05, 2011-06, 2014-05 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 488 November 2015 ICS 23.060.01 Supersedes EN 488:2011+A1:2
9、014English Version 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 Tuyaux de chauffage urbain - Systmes bloqus de tuyaux prisols pour les
10、rseaux deau chaude enterrs directement - Robinets prisols pour tubes de service en acier, isolation thermique en polyurthane et tube de protection en polythylne Fernwrmerohre - Werkmig gedmmte Verbundmantelrohrsysteme fr direkt erdverlegte Fernwrmenetze - Vorgedmmte Absperrarmaturen fr Stahlmediumro
11、hre mit Polyurethan-Wrmedmmung und Auenmantel aus Polyethylen This European Standard was approved by CEN on 5 September 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 w
12、ithout 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 oth
13、er 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,
14、 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 andUnited Kingdom. EUROPEAN COMMI
15、TTEE 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 national Members. Ref. No. EN 488:2015 EEN 488:2015 (E)
16、2 Contents Page European foreword . 4 Introduction 5 1 Scope 6 2 Normative references 6 3 Terms and definitions . 7 4 Requirements . 8 4.1 Pressure ratings for valves 8 4.1.1 General 8 4.1.2 Valves without indicated flow direction . 8 4.2 Service temperatures for valves 9 4.3 Steel parts 9 4.3.1 Gen
17、eral 9 4.3.2 Valve. 9 4.3.3 Valve extension pipe 9 4.3.4 Welding ends 9 4.3.5 Welding of steel parts 9 4.4 Casing 9 4.4.1 General 9 4.4.2 Requirements for polyethylene welding 9 4.4.3 Diameter and wall thickness of the casing 10 4.5 Polyurethane rigid foam insulation (PUR) . 10 4.5.1 General . 10 4.
18、5.2 Minimum insulation thickness 10 4.6 Valve assembly 10 4.6.1 Ends of valve assembly . 10 4.6.2 End of stem construction . 10 4.6.3 Main dimensions of the valve assembly . 11 4.6.4 Installation of measuring elements . 12 4.7 Requirements for effective operation and maintenance . 12 4.8 Resistance
19、to axial forces and bending moments. 12 5 Testing, test methods and test requirements 13 5.1 General . 13 5.2 Test specimens 13 5.2.1 General . 13 5.2.2 Test specimens for type testing steel parts of valve 13 5.2.3 Test specimens from casings and polyurethane foam 13 5.3 Steel parts . 13 5.3.1 Gener
20、al . 13 5.3.2 Type test of the steel parts 13 5.3.3 Production testing of valves . 17 5.4 Casing . 18 5.4.1 General . 18 5.4.2 Leak-tightness of the welded casing . 18 5.5 Polyurethane rigid foam insulation 18 5.6 Valve assembly 18 5.7 Surveillance system . 18 DIN EN 488:2016-02 EN 488:2015 (E) 3 6
21、Marking 18 6.1 General . 18 6.2 Steel valve 18 6.3 Casing 18 6.4 Valve assembly 19 7 Installation and maintenance 19 Annex A (informative) Guidelines for inspection and testing . 20 A.1 General . 20 A.2 Manufacturers type test 20 A.3 Manufacturers quality control 20 A.4 External inspection 20 A.5 Ex
22、tent of inspection . 20 A.6 Manufacturers responsibility . 20 Annex B (normative) Resistance to axial force and bending moment . 22 B.1 Axial strength test 22 B.2 Bending test 22 Annex C (normative) Resistance to bending forces 24 C.1 General . 24 C.2 Standard test assembly (four point bending test)
23、 25 Bibliography . 29 DIN EN 488:2016-02 EN 488:2015 (E) 4 European foreword This document (EN 488:2015) has been prepared by Technical Committee CEN/TC 107 “Prefabricated district heating and district cooling pipe systems”, the secretariat of which is held by DS. This European Standard shall be giv
24、en the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2016, and conflicting national standards shall be withdrawn at the latest by May 2016. Attention is drawn to the possibility that some of the elements of this document may be the
25、subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 488:2011+A1:2014. In comparison with the previous edition, the main changes in EN 488:2015 are: improvement and simplification of the type test of the
26、 steel valve. The cycle test has been integrated in the test sequence; the formulae in Annex C for the calculation of bending forces have been improved. C.1.3 of EN 488:2011+A1:2014 concerning alternative test application for diameters DN 200 mm, has been deleted. According to the CEN/CENELEC Intern
27、al 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ire
28、land, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 488:2016-02 EN 488:2015 (E) 5 Introduction EN 488 has also been aligned with EN 448 and other relevant European Sta
29、ndards. Other standards from CEN/TC 107 are: EN 253, 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 448, District heating pipes Preinsulated bonde
30、d pipe systems for directly buried hot water networks Fitting assemblies of 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 p
31、ipes, 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 15632
32、(all parts), District heating pipes Pre-insulated flexible pipe 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;
33、 EN 15698-2, District heating pipes Preinsulated bonded twin pipe systems for directly buried hot water networks Part 2: Fitting and valve assembly of steel service pipes, polyurethane thermal insulation and outer casing of polyethylene. DIN EN 488:2016-02 EN 488:2015 (E) 6 1 Scope This European Sta
34、ndard specifies requirements and test methods for valves of prefabricated thermally insulated valve assemblies comprising a steel valve, rigid polyurethane foam insulation and an outer casing of polyethylene for use in directly buried hot water networks with pre-insulated pipe assemblies in accordan
35、ce with EN 253. This European Standard applies only to factory made prefabricated insulated valve assemblies for continuous operation with hot water at various temperatures in accordance with EN 253:2009+A2:2015, Clause 1 and the valve assemblies with a maximum operation pressure of 25 bar. For high
36、er pressures, additional demands apply. NOTE For this application, the following valve types are commonly used: ball valves, gate valves, and butterfly valves. This European Standard does not include calculation rules for loads and stresses. These depend on the configuration of the system as it is i
37、nstalled. The design and installation rules are given in EN 13941. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references,
38、 the latest edition of the referenced document (including any amendments) applies. EN 19, Industrial valves Marking of metallic valves EN 253:2009+A2:2015, District heating pipes Preinsulated bonded pipe systems for directly buried hot water networks Pipe assembly of steel service pipe, polyurethane
39、 thermal insulation and outer casing of polyethylene EN 448:2015, 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 736-1, Valves - Terminology
40、Part 1: Definition of types of valves EN 10088-1:2014, Stainless steels Part 1: List of stainless steels EN 10204, Metallic products Types of inspection documents EN 12266-1, Industrial valves Testing of metallic valves Part 1: Pressure tests, test procedures and acceptance criteria Mandatory requir
41、ements EN 12502-4, Protection of metallic materials against corrosion Guidance on the assessment of corrosion likelihood in water distribution and storage systems Part 4: Influencing factors for stainless steels EN 13941:2009+A1:2010, Design and installation of preinsulated bonded pipe systems for d
42、istrict heating EN 14419, District heating pipes Preinsulated bonded pipe systems for directly buried hot water networks Surveillance systems EN ISO 12944-2, Paints and varnishes Corrosion protection of steel structures by protective paint systems Part 2: Classification of environments (ISO 12944-2)
43、 DIN EN 488:2016-02 EN 488:2015 (E) 7 EN ISO 12944-5, Paints and varnishes Corrosion protection of steel structures by protective paint systems Part 5: Protective paint systems (ISO 12944-5) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 253:2009+A2:
44、2015 and EN 448 and the following apply. For types of valves, the terms and definitions given in EN 736-1 apply. 3.1 nominal pressure (PN) class alphanumeric designation used for reference purposes related to a combination of mechanical and dimensional characteristics of a component of a pipe work s
45、ystem Note 1 to entry: It comprises the letters PN followed by a dimensionless number. Note 2 to entry: The number following the letters PN does not represent a measurable value and should not be used for calculation purposes except where specified in the relevant standard. Note 3 to entry: The desi
46、gnation PN is not meaningful unless it is related to the relevant component standard number. Note 4 to entry: The maximum allowable pressure of a pipework component depends on the PN number, the material and design of the component, its maximum allowable temperature, etc. The relevant European Compo
47、nent standards include tables of specified pressure/temperature ratings or, in minimum, include rules how to determine pressure/temperature ratings. Note 5 to entry: It is intended that all components with the same PN and DN designations have the same mating dimensions for compatible flange types. S
48、OURCE: EN 1333:2006, 2.1, modified added Note 1 to entry. 3.2 maximum operation pressure maximum internal pressure acting against the pipe wall at any point or in any section of the pipeline at a given operating temperature SOURCE: EN 13941:2009+A1:2010, 3.1.19, modified 3.3 nominal size DN alphanum
49、eric designation of size, common to components in piping systems which are used for reference purposes SOURCE: EN ISO 6708:1995, 2.1, modified 3.4 valve assembly assembly of valve, valve extension pipe, PE-casing and PUR-foam Note 1 to entry: Figure 1 gives an example of a valve assembly and its components. DIN EN 488:2016-02 EN 488:2015 (E) 8 Key a valve b valve extension pipe c valve assembly d service pipe e insulation Figur
