1、BS EN15632-4:2009ICS 23.040.01NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDDistrict heating pipes Pre-insulatedflexible pipe systemsPart 4: Bonded system with metalservice pipes; requirements and testmethodsThis British Standard was published under theauthori
2、ty of the StandardsPolicy and StrategyCommittee on 2009 BSI 2009ISBN 978 0 580 58239 4Amendments/corrigenda issued since publicationDate CommentsBS EN 15632-4:2009National forewordThis British Standard is the UK implementation of EN 15632-4:2009.The UK participation in its preparation was entrusted
3、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 necessary provisionsof a contract. Users are responsible for its correct application.Comp
4、liance with a British Standard cannot confer immunityfrom legal obligations.28 February BS EN 15632-4:2009EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 15632-4January 2009ICS 23.040.01English VersionDistrict heating pipes - Pre-insulated flexible pipe systems - Part4: Bonded system with metal se
5、rvice pipes; requirements andtest methodsTuyaux de chauffage urbain - Systmes de tuyaux flexiblesprisols - Partie 4: Systme bloqu avec tube de serviceen mtal - Prescriptions et mthodes dessaiFernwrmerohre - Werkmig gedmmte flexibleRohrsysteme - Teil 4: Verbundmediumrohre aus Metall -Anforderungen un
6、d PrfungenThis 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 alteration. Up-to-date lists and bibliograph
7、ical 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 translationunder the responsibility of a CEN
8、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, Germany, Greece, Hungary, Iceland, Ireland, Italy,
9、 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 NORMUNGManagement Centre: Avenue Marnix 17, B-1000 Brusse
10、ls 2009 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 15632-4:2009: EBS EN 15632-4:2009EN 15632-4:2009 (E) 2 Contents Page Foreword 3 Introduction .4 1 Scope 5 2 Normative references 5 3 Terms and definitions .5 4 Operating conditi
11、ons .6 5 Requirements .6 5.1 General requirements 6 5.2 Service pipes and fittings .6 5.3 Axial shear stress 7 5.4 Linear water tightness .7 5.5 Fittings 7 5.6 Surveillance systems 7 6 Test procedures .7 6.1 General 7 6.2 Axial shear stress 7 6.2.1 General 7 6.2.2 Test procedure .8 6.3 Cycle test 9
12、6.4 Linear water tightness .9 BS EN 15632-4:2009EN 15632-4:2009 (E) 3 Foreword This document (EN 15632-4:2009) 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 o
13、f 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 drawn to the possibility that some of the elements of this document may be the subject of pa
14、tent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document is one of a series of standards which form several parts of EN 15632, District heating pipes Pre-insulated flexible pipe systems: Part 1: Classification, general requirements an
15、d test methods; Part 2: Bonded system with plastic service pipes; requirements and test methods; Part 3: Non bonded system with plastic service pipes; requirements and test methods; Part 4: Bonded system with metal service pipes; requirements and test methods. According to the CEN/CENELEC Internal R
16、egulations, the national standards organizations of the following 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, N
17、etherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 15632-4:2009EN 15632-4:2009 (E) 4 Introduction Pre-insulated flexible bonded pipe systems with metallic service pipes are used in district and local heating networks. This part
18、 of the series of standards for the various types of flexible pipe systems is intended to be used in connection with EN 15632-1 where the basic design criteria for flexible district heating pipes are specified. BS EN 15632-4:2009EN 15632-4:2009 (E) 5 1 Scope This European Standard provides requireme
19、nts and test methods for flexible, pre-insulated, directly buried district heating pipe assemblies with metallic service pipes and bonding between the layers of the pipes and thermal insulation materials of polyurethane or polyisocyanurate foam, the casing pipes being made of polyethylene. This Euro
20、pean Standard is valid for maximum operating temperatures up to 140 C and pressures up to 25 bar for a design lifetime of at least 30 years. NOTE For higher temperatures or for the transport of other fluids, for example potable water, additional requirements and testing is needed. Such requirements
21、are not specified in this European Standard. 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 am
22、endments) applies. EN 1057, Copper and copper alloys Seamless, round copper tubes for water and gas in sanitary and heating applications EN 10088-2, Stainless steels Part 2: Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for general purposes EN 10246-1, Non des
23、tructive testing of steel tubes Part 1: Automatic electromagnetic testing of seamless and welded (except submerged arc welded) ferromagnetic steel tubes for verification of hydraulic leak-tightness EN 10305-1, Steel tubes for precision applications Technical delivery conditions Part 1: Seamless cold
24、 drawn tubes EN 10305-2, Steel tubes for precision applications Technical delivery conditions Part 2: Welded cold drawn tubes EN 12449, Copper and copper alloys Seamless, round tubes for general purposes EN 13941, Design and installation of preinsulated bonded pipe systems for district heating EN 14
25、419, District heating pipes Preinsulated bonded pipe systems for directly buried hot water networks Surveillance systems EN 15632-1:2009, District heating pipes Pre-insulated flexible pipe systems Part 1: Classification, general requirements and test methods 3 Terms and definitions For the purposes
26、of this document, the terms and definitions given in EN 15632-1:2009 shall apply. BS EN 15632-4:2009EN 15632-4:2009 (E) 6 4 Operating conditions Pipe systems according to this European Standard shall have a lifetime of at least 30 years at a continuous operating temperature of 120 C and a maximum op
27、erating temperature of 140C. Table 1 Operating pressures Service pipe Operating Pressure 16 bar 25 bar Copper X -Mild steel X X Corrugated stainless steel X X 5 Requirements 5.1 General requirements In addition to the general requirements defined in EN 15632-1, the following product specific require
28、ments apply. 5.2 Service pipes and fittings The service pipes shall fulfil the requirements of diameter and wall thickness in Table 2. Table 2 Nominal diameters and minimum wall thickness Nominal diameter DN Outside diameter d2 ,minimum inside diameter d1, and minimum wall thickness s mm Copper Mild
29、 steel Corrugated stainless steel d2 mm s mm d2 mm s mm d1 mm s mm 12 16 20 25 32 15 18 22 28 35 1,0 1,0 1,0 1,2 1,5 - 20 25 28 - - 2,0 2,0 2,0 - 14 18 22 30 39 0,2 0,2 0,2 0,3 0,4 40 50 65 42 54 - 1,5 1,5 - - - - - - - 48 60 75 0,5 0,5 0,6 80 100 125 150 - - - - - - - - - - - - - - - - 98 127 147 1
30、97 0,8 0,9 1,0 1,2 EN 10088-2 shall be applied for pipes made of corrugated stainless steel. Material: 1.4301 or 1.4404 For copper pipes EN 12449 shall be applied. The material shall be Cu-DHP-CW024A-H40, and for the tolerances EN 1057 shall be applied. BS EN 15632-4:2009EN 15632-4:2009 (E) 7 For se
31、amless steel pipes EN 10305-1 shall be applied. The material shall be E215+N. For welded steel pipes EN 10305-2 shall be applied. The material shall be E215+N. Welded pipes shall be tightness tested according to EN 10246-1. Deviating from these standards, service pipes and fittings shall be designed
32、 and tested for the operating cycles specified in 6.3. 5.3 Axial shear stress The axial shear strength between the service pipe and the insulation shall be at least 0,12 MPa when tested according to 6.2 at ambient temperature. The axial shear strength between the service pipe and the insulation shal
33、l be at least 0,08 MPa when tested according to 6.2 at maximum operating temperature. This requirement is only applicable for smooth wall service pipes and not relevant for corrugated stainless steel pipes. 5.4 Linear water tightness When tested in accordance with 6.4, the amount of water leaking th
34、rough any of the pipe ends shall not exceed 100 g after 168 hours. 5.5 Fittings When tested in accordance with 6.3 there shall be no leakage. 5.6 Surveillance systems If measuring systems are installed, all relevant requirements of EN 14419 shall be fulfilled before and after the flexibility test ac
35、cording to EN 15632-1:2009, 6.1, and the linear water tightness test according to 6.4 of this document shall be performed with the measuring elements installed. 6 Test procedures 6.1 General Unless stated otherwise, all tests are to be carried out: no sooner than 72 hours after production, at room t
36、emperature, on samples taken from coiled pipes. 6.2 Axial shear stress 6.2.1 General The shear stress of a soft steel or copper smooth walled pipe assembly shall be determined on at least 3 test specimens at each temperature. There shall be no visual air gap between service pipe and insulation on a
37、corrugated stainless pipe assembly (For corrugated stainless steel pipe assembly an axial shear test cannot be carried out). BS EN 15632-4:2009EN 15632-4:2009 (E) 8 6.2.2 Test procedure The axial shear stress between the service pipe and the insulation shall be tested as shown in Figure 1, where (1)
38、 is the test specimen, (2) a cylindrical piston pressing onto the service pipe and a support (3) with a cylindrical opening. The test specimen (1) shall have a length which equals the outer diameter of the casing 5 %, the ends shall be cut at right angle. The piston (2) shall be made from metal and
39、shall have an outer diameter which equals the outer diameter of the service pipe with a tolerance of up to 01mm. The support (3) shall be made of metal, the diameter of the circular central opening shall equal the mean of the inner and outer diameter of the insulation. Key 1 test specimen 2 piston f
40、or force F 3 support Figure 1 Shear stress test apparatus BS EN 15632-4:2009EN 15632-4:2009 (E) 9 The piston (2) and the support (3) are to be moved towards each other with a tensile testing machine at a constant speed of 5 mm per minute and the movement and the force is to be recorded. The shear st
41、ress axis to be calculated as follows: ax= F/(L d2) in N/m2where F is the recorded force in N L is the length of the test in m d2 is the outer diameter of the service pipe in m 6.3 Cycle test A straight sample of service pipe shall be fitted with a connector at one side and a T-piece or a reducer at
42、 the other side. The length of the sample shall be at least 5 times the outer diameter of the pipe. This sample shall be tested at alternating strain and alternating operating pressure according to Table 3 at the continuous operating temperature of the pipe system. The test cycles for service pipes
43、are given in Table 4. Table 3 Pressure testing of fittings Material Alternating strain mm/m Alternating pressurebar Connection of the fitting Mild steel 0 to 1,2 2 to 25 Butt weld Butt welded T-piece or reducer Copper 0 to 1,7 2 to 16 Soldered connector or press coupling Soldered T-piece or reducer
44、or press T-piece or reducer Corrugated stainless steel 0 to 1,7 2 to 25 System specific connector System specific T-piece Table 4 Test cycles for service pipes Service pipe nominal diameter DN Test cycles Cycle times DN 50 mm 2500 1 min DN 50 mm 500 1 min The test cycle numbers are derived from EN 1
45、3941. 6.4 Linear water tightness On a 4 m long sample of the pipe, taken from a pipe in the delivery condition the casing shall be removed on 0,1 m at 2,0 m distance from one pipe end. A suitable water container shall be sealed to the casing at both sides of the exposed insulation and be filled with
46、 water with a pressure of 0,05 bar at room temperature. The sample shall be placed horizontally. In both ends of the sample a suitable container shall be mounted to collect water leaking from the pipe end. After 168 h, the water collected from the pipe ends shall be weighted. BS EN15632-4:2009BSI Gr
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