EN 15632-1:2009

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Cevi za daljinsko ogrevanje - Izolirani gibki cevni sistemi - 1. del: Klasifikacija, splošne zahteve in preskusne metodeFernwärmerohre - Werkmäßig gedämmte flexible Rohrsysteme - Teil 1: Klassifikation, allgemeine Anforderungen und PrüfungenTuyaux de chauffage urbain - Systèmes de tuyaux flexibles préisolés - Partie 1: Classification, prescriptions générales et méthodes d'essaiDistrict heating pipes - Pre-insulated flexible pipe systems - Part 1: Classification, general requirements and test method91.140.10Sistemi centralnega ogrevanjaCentral heating systems23.040.01Deli cevovodov in cevovodi na splošnoPipeline components and pipelines in generalICS:Ta slovenski standard je istoveten z:EN 15632-1:2009SIST EN 15632-1:2009en,fr01-marec-2009SIST EN 15632-1:2009SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 15632-1January 2009ICS 23.040.01 English VersionDistrict heating pipes - Pre-insulated flexible pipe systems - Part1: Classification, general requirements and test methodsTuyaux de chauffage urbain - Systèmes de tuyaux flexiblespréisolés - Partie 1: Classification, prescriptions généraleset méthodes d'essaiFernwärmerohre - Werkmäßig gedämmte flexibleRohrsysteme - Teil 1: Klassifikation, allgemeineAnforderungen und PrüfungenThis 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 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 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, Germany, 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 STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre:
Avenue Marnix 17,
B-1000 Brussels© 2009 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 15632-1:2009: ESIST EN 15632-1:2009

1 Scope This European Standard provides classification, general requirements and test methods for flexible, pre-insulated, directly buried district heating pipe systems. It is intended to be used in conjunction with parts 2, 3, 4, and 5.
Depending on the pipe assembly (see Table 4), this European Standard is valid for maximum operating temperatures of 95 °C to 140 °C and operating pressures of 6 bar to 25 bar. The pipe systems are designed for a lifetime of 30 years. For pipe systems with plastic service pipes, the respective temperature profiles are defined in EN 15632-2 and EN 15632-3. NOTE For the transport of other liquids, for example potable water, additional requirements may be applicable. 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 253:2008, 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 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 oxidation induction time EN 744, Plastics piping and ducting systems — Thermoplastics pipes — Test method for resistance to external blows by the round-the-clock-method EN 1605, Thermal insulating products for building applications — Determination of deformation under specified compressive load and temperature conditions EN 1606, Thermal insulating products for building applications — Determination of compressive creep EN 12085, Thermal insulating products for building applications — Determination of linear dimensions of test specimens EN 12667, Thermal performance of building materials and products — Determination of thermal resistance by means of guarded hot plate and heat flow meter methods — Products of high and medium thermal resistance EN 13941, Design and installation of preinsulated bonded pipe systems for district heating EN 14419:2003, District heating pipes — Pre-insulated bonded pipe systems for directly buried hot water networks — Surveillance systems EN 60811-4-1:2004, Insulating and sheathing of electric and optical cables — Common test methods — Part 4-1: Methods specific to polyethylene and polypropylene compounds - Resistance to environmental stress cracking - Measurement of the
melt flow index - Carbon black and/or mineral filler content measurement in SIST EN 15632-1:2009

temperature of the heat medium for which the system has been designed to operate continuously NOTE See Table 4 3.3 maximum operating temperature
exceptionally high operating temperature occurring for short periods only 3.4 operating pressure
pressure at which the hot water network is designed to operate continuously 3.5 service pipe medium carrying pipe which is in contact with warm water 3.6 outer casing separately applied outer layer of the pipe assembly, protecting the construction during installation and protecting the construction against external influences (after installation) 3.7 insulation layer layer which provides the designated thermal characteristics of the pipe assembly SIST EN 15632-1:2009

assembled product, consisting of at least one service pipe, insulating material and casing 3.9 pipe system
pipe assembly, plus service pipe fittings, casing joints, and other components like surveillance elements 3.10 single pipe system SPS pipe system with one service pipe 3.11 twin pipe system TPS pipe system with two service pipes
3.12 bonded system service pipe, insulating material and casing which are bonded by the insulating material 3.13 non bonded system service pipe, insulating material and casing which are not bonded by the insulating material 3.14 casing joint assembly casing joint assembled product, consisting of at least insulating material and casing, designed to protect and thermally insulate a service pipe joint 3.15 ageing factor
fa factor without a dimension which expresses the ageing of the insulating layer in relation to the expected lifetime 3.16 moisture factor fm factor without a dimension for the influence of moisture on the insulating layer in relation to the expected lifetime NOTE The term 'moisture' as it is used here is not identical with the term 'moisture' as it is used in EN 14419. 3.17 ovality difference between the maximum and minimum diameter at a cross section expressed as a percentage of the minimum diameter SIST EN 15632-1:2009

Table 1 — Symbols, definitions and dimensions Symbol DescriptionUnitA projected area of the service pipe m2 d1 inner diameter of the service pipe m d1,c inner diameter of the service pipe at the crest of a corrugation m d1,t inner diameter of the service pipe at the trough of a corrugation m d2 outer diameter of the service pipe m d2,c outer diameter of the service pipe at the crest of a corrugation m d2,t outer diameter of the service pipe at the trough of a corrugation m d3 inner diameter of the casing m d3,c inner diameter of the casing at the crest of a corrugation m d3,t inner diameter of the casing at the trough of a corrugation m d4 outer diameter of the casing m d4,c outer diameter of the casing at the crest of a corrugation m d4,t outer diameter of the casing at the trough of a corrugation m F force N fa ageing factor / fcor corrective factor for differences between calculated and measured thermal conductivities / Fexp force resulting from heat expansion N fm moisture factor / Fweight weight force N g acceleration due to gravity m/s2 H earth covering m L length of the
test m M mass of the pipe inclusively the water inside kg Pexp area related load on the insulation resulting from heat expansion of the service pipe Pa Ptest test load Pa Pweight area related load on the cross section of the test specimen of the insulation material Pa q heat flow rate W/m qf radial heat flow rate for buried single pipe system in the flow pipe W/m qf+r radial heat flow rate for buried single pipe system in the flow and return pipe W/m qr radial heat flow rate for buried single pipe system in the return pipe W/m qTPS radial heat flow rate for buried twin pipe system W/m r bending radius in the axis of the pipe m R radial thermal resistance mK/W R,ϑav radial thermal resistance of a twin pipe system at any average temperature mK/W R0 thermal transmittance factor from earth surface to ambient air m2K/W Rdecl declared value of radial thermal resistance mK/W Rdecl,ϑav declared value of thermal resistance at average temperature mK/W Rdesign design value for the radial resistance mK/W Rf radial thermal resistance of the flow pipe mK/W Rr radial thermal resistance of the return pipe mK/W Rs radial thermal resistance of the soil mK/W RTPS radial thermal resistance of a twin pipe system mK/W RTPS,ϑav radial thermal resistance of a twin pipe system at any average temperature mK/W s thickness mm SDR ratio of nominal outer diameter and nominal wall thickness /
Table 2 — Symbols, definitions and dimensions (continued)
smin minimum wall thickness mm sSTB thickness of test piece after load testing and temperature testing mm τax shear stress N/m2 U coefficient of heat loss W/(mK) Uf coefficient of heat loss for buried single pipe system W/(mK) Ur coefficient of heat loss for buried single pipe system in the return pipe W/(mK) UTPS coefficient of heat loss in a twin pipe system W/(mK) Z depth of laying distance from the center line of the pipe to the surface m Zcor corrected minimum value for thermal transmittance on the surface of the earth m λϑav thermal conductivity of a pipe system at any average
temperature W/(mK) C thermal conductivity of the casing W/(mK) decl declared thermal conductivity of a pipe system W/(mK) λdecl,ϑav declared value of thermal conductivity at average temperature W/(mK) design calculation value of the thermal conductivity of the insulation material W/(mK) I thermal conductivity of the insulation W/(mK) s thermal conductivity of the soil W/(mK) S
thermal conductivity of the service pipe W/(mK) λTPS,ϑav thermal conductivity of a twin pipe system at any average temperature W/(mK) ϑ1 temperature at the inner diameter of the service pipe K ϑ1,f temperature at the inner diameter of the service flow pipe
K ϑ1,r temperature at the inner diameter of the service return pipe K ϑ2 temperature at the outer diameter of the service pipe K ϑ4 temperature at the outer diameter of the casing K ϑamb ambient temperature K ϑav average temperature K ϑfflow temperature K ϑr return temperature K ϑs temperature of the soil K
compression mm
thermal transmittance (from earth surface to ambient air) 1 position at the inner diameter of the service pipe 2 position at the outer diameter of the service pipe 3 position at the inner diameter of the casing 4 position at the outer diameter of the casing a ageing amb ambient av average ax axial c crest of a corrugation C casing bzw. casing pipe cor corrective decl declared design design exp expansion f flow I insulation m moisture min minimal r return S service pipe s soil STB stability t trough of a corrugation test test TPS twin Pipe System weight weight x placeholder for 1,2,3 or 4 ϑav average temperature
Table 4 — Abbreviations Abbreviation Name PB polybutylene PE-HD high density polyethylene PE-LD low density polyethylene PE-X cross linked polyethylene PE-Xb silane cross linked polyethylene SIST EN 15632-1:2009

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