SIST EN 448:2016
(Main)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
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
This European Standard specifies requirements and test methods for fittings of prefabricated thermally insulated pipe-in-pipe assemblies comprising a steel service fitting from DN 20 to DN 1200, rigid polyurethane foam insulation and an outer casing of polyethylene for use in directly buried hot water networks with preinsulated pipe assemblies in accordance with EN 253.
This European Standard covers the following fittings: bend, tee, reducer, single use compensator and anchor.
This European Standard applies only to factory made prefabricated fitting assemblies and single use compensators for continuous operation with hot water at various temperatures in accordance with EN 253.
This European Standard applies to fitting assemblies with a minimum design pressure of 16 bar (overpressure) complying with EN 13941.
This European Standard does not include calculation rules for loads and stresses. The design and installation rules, for the system, are given in EN 13941.
Fernwärmerohre - Werkmäßig gedämmte Verbundmantelrohrsysteme für direkt erdverlegte Fernwärmenetze - Verbundformstücke, bestehend aus Stahl-Mediumrohr, Polyurethan-Wärmedämmung und Außenmantel aus Polyethylen
Diese Europäische Norm legt Anforderungen an und Prüfverfahren für Formstücke von werkmäßig wärme-gedämmten Verbundmantelrohren für erdverlegte Fernwärmenetze fest, die aus einem Stahl Mediumrohr von DN 20 bis DN 1 200 mit Wärmedämmung aus Polyurethan-Hartschaumstoff und einer Ummantelung aus Polyethylen für direkt erdverlegte Fernwärmenetze aus werkmäßig gedämmten Verbund Rohrsystemen nach EN 253 bestehen.
Diese Europäische Norm behandelt folgende Formstücke: Bogenstück, T-Stück, Reduzierstück, Einmalkompensator und Festpunktelement.
Diese Europäische Norm gilt ausschließlich für werkmäßig gedämmte Verbundformstücke und Einmalkompensatoren für den Dauerbetrieb mit Warmwasser bei unterschiedlichen Betriebstemperaturen nach EN 253.
Diese Europäische Norm gilt für Verbundformstücke, die für einen Druck von mindestens 16 bar (Überdruck) nach EN 13941 ausgelegt sind.
Diese Europäische Norm enthält keine Regeln für die Berechnung von Last- und Spannungswerten. Die Regeln für Aus¬legung und Installation des Systems sind EN 13941 zu entnehmen.
Tuyaux de chauffage urbain - Systèmes bloqués de tuyaux préisolés pour les réseaux enterrés d'eau chaude - Raccords préisolés, tubes de service en acier, isolation thermique en polyuréthanne et tube de protection en polyéthylène
La présente Norme européenne définit les exigences et les méthodes d’essai applicables aux raccords des systèmes préfabriqués de tubes isolés thermiquement pour les réseaux d'eau chaude enterrés directement, conformes à l’EN 253, comprenant des raccords de service en acier de DN 20 à DN 1200, une isolation en mousse rigide de polyuréthane et un tube de protection en polyéthylène.
La présente Norme européenne couvre les raccords suivants : coude, té, réducteur, compensateur à usage unique et pièce d’ancrage.
La présente Norme européenne s’applique uniquement aux assemblages de raccords préfabriqués en usine et aux compensateurs à usage unique utilisés en service continu avec de l’eau chaude à diverses températures conformément à l’EN 253.
La présente Norme européenne s’applique aux raccords de pression minimale de calcul de 16 bar (surpression) conformément à l’EN 13941.
La présente Norme européenne ne comprend pas de règles de calcul pour les charges et les contraintes. Les règles de conception et d'installation du système sont données dans l'EN 13941.
Cevi za daljinsko ogrevanje - Izolirani vezani cevni sistemi za podzemeljska toplovodna omrežja - Sestav fitingov jeklenih cevi, poliuretanske toplotne izolacije in zunanjega polietilenskega plašča
Ta evropski standard določa zahteve in preskusne metode za fitinge predizdelanih, toplotno izoliranih cevnih sestavov, sestavljenih iz jeklenih fitingov od DN 20 do DN 1200, trde poliuretanske izolacijske pene in zunanjega polietilenskega plašča za uporabo v podzemeljskih toplovodnih omrežjih z izoliranimi vezanimi sistemi v skladu s standardom EN 253. Ta evropski standard zajema naslednje fitinge: kolena, priključke T, reducirne priključke, kompenzatorje za enkratno uporabo in sidra. Ta evropski standard se uporablja samo za izolirane sestave fitingov in kompenzatorje za enkratno uporabo za neprekinjeno delovanje z vročo vodo pri različnih temperaturah v skladu s točko 1 standarda EN 253:2009. Ta evropski standard se uporablja za sestave fitingov z minimalnim predvidenim tlakom 16 barov (nadtlak) v skladu s standardom EN 13941. Smernice za preverjanje kakovosti so navedene v dodatku A tega evropskega standarda. Postopki za varjenje polietilena so navedeni v dodatku B tega evropskega standarda. OPOMBA: Ta evropski standard ne zajema pravil za izračun obremenitev in napetosti.
General Information
- Status
- Withdrawn
- Public Enquiry End Date
- 29-Apr-2014
- Publication Date
- 08-Dec-2015
- Withdrawal Date
- 27-Oct-2019
- Technical Committee
- I13 - Imaginarni 13
- Current Stage
- 9900 - Withdrawal (Adopted Project)
- Start Date
- 28-Oct-2019
- Due Date
- 20-Nov-2019
- Completion Date
- 28-Oct-2019
Relations
- Effective Date
- 01-Jan-2016
- Effective Date
- 23-Oct-2019
- Effective Date
- 14-Jun-2017
Frequently Asked Questions
SIST EN 448:2016 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "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". This standard covers: This European Standard specifies requirements and test methods for fittings of prefabricated thermally insulated pipe-in-pipe assemblies comprising a steel service fitting from DN 20 to DN 1200, rigid polyurethane foam insulation and an outer casing of polyethylene for use in directly buried hot water networks with preinsulated pipe assemblies in accordance with EN 253. This European Standard covers the following fittings: bend, tee, reducer, single use compensator and anchor. This European Standard applies only to factory made prefabricated fitting assemblies and single use compensators for continuous operation with hot water at various temperatures in accordance with EN 253. This European Standard applies to fitting assemblies with a minimum design pressure of 16 bar (overpressure) complying with EN 13941. This European Standard does not include calculation rules for loads and stresses. The design and installation rules, for the system, are given in EN 13941.
This European Standard specifies requirements and test methods for fittings of prefabricated thermally insulated pipe-in-pipe assemblies comprising a steel service fitting from DN 20 to DN 1200, rigid polyurethane foam insulation and an outer casing of polyethylene for use in directly buried hot water networks with preinsulated pipe assemblies in accordance with EN 253. This European Standard covers the following fittings: bend, tee, reducer, single use compensator and anchor. This European Standard applies only to factory made prefabricated fitting assemblies and single use compensators for continuous operation with hot water at various temperatures in accordance with EN 253. This European Standard applies to fitting assemblies with a minimum design pressure of 16 bar (overpressure) complying with EN 13941. This European Standard does not include calculation rules for loads and stresses. The design and installation rules, for the system, are given in EN 13941.
SIST EN 448:2016 is classified under the following ICS (International Classification for Standards) categories: 23.040.07 - Pipeline and its parts for district heat; 23.040.40 - Metal fittings; 91.140.65 - Water heating equipment. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 448:2016 has the following relationships with other standards: It is inter standard links to SIST EN 448:2009, SIST EN 448:2020, SIST EN 448:2020. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase SIST EN 448:2016 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of SIST standards.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.RG]HPHOMVNDFernwärmerohre - Werkmäßig gedämmte Verbundmantelrohrsysteme für direkt erdverlegte Fernwärmenetze - Verbundformstücke, bestehend aus Stahl-Mediumrohr, Polyurethan-Wärmedämmung und Außenmantel aus PolyethylenTuyaux de chauffage urbain - Systèmes bloqués de tuyaux préisolés pour les réseaux enterrés d'eau chaude - Raccords préisolés, tubes de service en acier, isolation thermique en polyuréthanne et tube de protection en polyéthylèneDistrict 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 polyethylene91.140.65Oprema za ogrevanje vodeWater heating equipment23.040.40Kovinski fitingiMetal fittings23.040.07Cevovodi za daljinsko ogrevanje in njihovi deliPipeline and its parts for district heatICS:Ta slovenski standard je istoveten z:EN 448:2015SIST EN 448:2016en,fr,de01-januar-2016SIST EN 448:2016SLOVENSKI
STANDARDSIST EN 448:20091DGRPHãþD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 448
November 2015 ICS 23.040.40 Supersedes EN 448:2009English Version
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
Tuyaux de chauffage urbain - Systèmes bloqués de tuyaux préisolés pour des réseaux d'eau chaude enterrés directement - Raccords préisolés pour tubes de service en acier, isolation thermique en polyuréthane et tube de protection en polyéthylène
Fernwärmerohre - Werkmäßig gedämmte Verbundmantelrohrsysteme für direkt erdverlegte Fernwärmenetze - Verbundformstücke, bestehend aus Stahl-Mediumrohr, Polyurethan-Wärmedämmung und Außenmantel 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 without 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 other 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, 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 and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR 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 448:2015 ESIST EN 448:2016
Guidelines for inspection and testing . 23 A.1 General . 23 A.2 Manufacturer’s type test . 23 A.3 Manufacturer’s quality control . 23 A.4 External inspection . 23 A.5 Extent of inspection . 23 A.6 Manufacturer’s responsibility . 23 Annex B (informative)
Procedures for polyethylene welding . 26 B.1 General . 26 B.2 Recommendations for site, machine and equipment . 26 B.3 Items . 26 B.4 Butt fusion welding . 26 B.5 Extrusion welding . 28 Bibliography . 30
deviation in direction of the steel pipe centre lines 3.3 butt welded bend bend manufactured either by hot bending of steel pipe or by hot forming of steel plates which are subsequently welded together 3.4 cold formed bend bend manufactured by cold bending of steel pipe 3.5 cap not pre-insulated butt welded fitting to be welded on the end of a pipe or fitting 3.6 fitting reducer, tee, factory-made elbow and bend, cap, welding stub, mechanical joint 3.7 forged T-piece T-piece manufactured by hot forming of either steel pipes or steel plates which are subsequently welded together 3.8 hot formed bend bend manufactured by heating pipe during bending 3.9 induction bend bend manufactured by induction bending 3.10 induction bending continuous bending process which utilizes induction heating to create a narrow, circumferential, heated band around the material being bent 3.11 nominal size, DN alphanumeric designation of size, common to components in piping systems which are used for reference purposes [SOURCE: EN ISO 6708:1995, 2.1, modified] SIST EN 448:2016
Key a cold or hot formed bends e tee with welding saddle b butt welding bend or elbows f tee with drawn collar c
g directly welded tee d forged tee
Figure 1 — Examples SIST EN 448:2016
For Sweden, a deviating situation is applicable for EN 253:2009+A2:2015, Table 1 (see the A-deviation in EN 253:2009+A2:2015, Annex G). 4.1.3 Wall thickness and diameter According to the scope of this European Standard, all components shall be designed for a minimum of 16 bar. NOTE If the fitting assemblies have to be used in situations with pressures higher than 16 bar, extra calculations will be necessary. The minimum nominal wall thickness of all components shall prior to processing be at least the same as for the straight pipes. The nominal diameter, the outside diameter and the minimum nominal wall thickness shall be the same as for the straight pipes in accordance with EN 253:2009+A2:2015, Table 2. The tolerances on the outside diameter of the pipe ends shall be in accordance with EN 253:2009+A2:2015, Table 3. Subject to design considerations other wall thicknesses than those given in EN 253:2009+A2:2015, Table 2 may be used, but in no case shall these be less than the minima indicated in EN 253:2009+A2:2015, Table 2. All components shall be designed in accordance with EN 13941, for the actions and stresses that normally occur during a system's entire service life. 4.1.4 Bends 4.1.4.1 Butt welding bends The dimensions shall be in accordance with EN 10253-2 with the exception that the bend radius shall be
· 1,5 times the outer diameter. 4.1.4.2 Cold formed bends Cold formed bends shall be produced from seamless pipe or longitudinal welded pipes. At cold formed bends made of longitudinal welded pipes the weld bead shall be welded to factor V = 1 (calculation stress = 100 %). After bending, the minimum wall thickness of the bent pipe shall be not less than 85 % of the nominal wall thickness of the straight pipe (see EN 253:2009+A2:2015, Table 2). The maximum ovality in the bent area shall not exceed 6 %. The formula for the calculation of the ovality is: ()sDDD−=×os maxs min 100 (1) where SIST EN 448:2016
¶ DN 200 ±2,0° > DN 200 ±1,0° 4.1.5 T-pieces 4.1.5.1 Forged T-pieces The wall thickness T and T1, see EN 10253-2, shall be at least the same as those for the straight pipes, see EN 253:2009+A2:2015, Table 2. All other dimensions shall be in accordance with EN 10253-2. 4.1.5.2 Welding saddles Welding saddles shall be of the type which shall be welded into the wall of the main pipe. The wall thickness of the welding saddles shall be at least the same as the wall thicknesses of the main pipes and the branch pipes which shall be welded to the saddles. 4.1.5.3 Welded T-pieces Welded T-pieces shall be manufactured either by using welding saddles or by drawing a collar on which the branch pipe is welded or by welding the branch pipe directly to the main pipe. The wall thickness of the collar shall be at least the same as that for the branch pipe, see EN 253:2009+A2:2015, Table 2. The collar shall be drawn opposite the welding seam in the main pipe. When using branch pipe directly welded to the main pipe, compensating (reinforcement) plates can be used according to EN 13941 requirements. SIST EN 448:2016
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