EN 253:2019

SLOVENSKI STANDARD
01-januar-2020
Nadomešča:
SIST EN 253:2009+A2:2015
Cevi za daljinsko ogrevanje - Poviti enocevni sistemi za neposredno vkopana
vročevodna omrežja - Tovarniško izdelan cevni sestav iz jeklene delovne cevi,
obdane s poliuretansko toplotno izolacijo in zaščitnim plaščem iz polietilena
District heating pipes - Bonded single pipe systems for directly buried hot water networks
- Factory made pipe assembly of steel service pipe, polyurethane thermal insulation and
a casing of polyethylene
Fernwärmerohre - Werkmäßig gedämmte Verbundmantelrohrsysteme für direkt
erdverlegte Fernwärmenetze - Verbund-Rohrsystem bestehend aus Stahl-Mediumrohr,
Polyurethan-Wärmedämmung und Außenmantel aus Polyethylen
Tuyaux de chauffage urbain - Systèmes bloqués de tuyaux pour les réseaux d'eau
chaude enterrées directement - Assemblages de tubes de service en acier
manufacturés, isolation thermique en polyuréthane et tube de protection en polyéthylène
Ta slovenski standard je istoveten z: EN 253:2019
ICS:
23.040.07 Cevovodi za daljinsko Pipeline and its parts for
ogrevanje in njihovi deli district heat
23.040.10 Železne in jeklene cevi Iron and steel pipes
91.140.65 Oprema za ogrevanje vode Water heating equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 253
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2019
EUROPÄISCHE NORM
ICS 23.040.07; 23.040.10 Supersedes EN 253:2009+A2:2015
English Version
District heating pipes - Bonded single pipe systems for
directly buried hot water networks - Factory made pipe
assembly of steel service pipe, polyurethane thermal
insulation and a casing of polyethylene
Tuyaux de chauffage urbain - Systèmes bloqués de Fernwärmerohre - Werkmäßig gedämmte
tuyaux pour les réseaux d'eau chaude enterrées Verbundmantelrohrsysteme für direkt erdverlegte
directement - Assemblages de tubes de service en acier Fernwärmenetze - Verbund-Rohrsystem bestehend
manufacturés, isolation thermique en polyuréthane et aus Stahl-Mediumrohr, Polyurethan-Wärmedämmung
tube de protection en polyéthylène und Außenmantel aus Polyethylen
This European Standard was approved by CEN on 26 August 2019.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, 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: Rue de la Science 23, B-1040 Brussels
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 253:2019 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Requirements . 6
5 Test methods . 16
6 Marking . 26
Annex A (informative)  Relation between actual continuous operating conditions and
accelerated ageing test conditions. 28
Annex B (informative) Guidelines for inspection and testing . 32
Annex C (normative)  Thermal conductivity of factory made pipe assemblies — Test procedure . 36
Annex D (informative) Waste treatment and recycling . 41
Bibliography . 42

European foreword
This document (EN 253:2019) 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 given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by April 2020, and conflicting national standards shall be withdrawn at
the latest by April 2020.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 253:2009+A2:2015.
In comparison with the previous edition, the main changes in this new edition of EN 253 are:
— editorial changes to the new structure of standards prepared by the Technical Committee CEN/TC 107;
— specification of steel grade moved into EN 13941-1;
— added thermal insulation series;
— added linear water tightness: requirements and test method;
— revised description of expected thermal life and long term temperature resistance in balance with
EN 13941-1;
— revised description on shear strength: requirements and test method;
— removed Tangential shear strength and long-term creep resistance and modulus;
— revised Annex A, “Relation between actual continuous operating condition and accelerated ageing test
conditions”;
— removed Annex C, “Calculated Continuous Operating Temperature (CCOT)”.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia,
Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Introduction
This specification is part of the standards for bonded pipe systems for district heating using polyurethane
(PUR) foam thermal insulation applied to bond to a steel service pipe and a polyethylene (PE) casing.
The other standards from CEN/TC 107 covering this subject are:
— EN 448, District heating pipes – Bonded single pipe systems for directly buried hot water networks –
Factory made fitting assemblies of steel service pipes, polyurethane thermal insulation and a casing of
polyethylene;
— EN 488, District heating pipes – Bonded single pipe systems for directly buried hot water networks –
Factory made steel valve assembly for steel service pipes, polyurethane thermal insulation and a casing of
polyethylene;
— EN 489-1, District heating pipes – Bonded single and twin pipe systems for directly buried hot water
networks – Part 1: Joint casing assemblies and thermal insulation for hot water networks in accordance
with EN 13941-1;
— EN 13941-1, District heating pipes – Design and installation of thermal insulated bonded single and twin
pipe systems for directly buried hot water networks – Part 1: Design;
— EN 13941-2, District heating pipes – Design and installation of thermal insulated bonded single and twin
pipe systems for directly buried hot water networks – Part 2: Installation;
— EN 14419, District heating pipes – Bonded single and twin pipe systems for directly buried hot water
networks – Surveillance systems;
— EN 15698-1, District heating pipes – Bonded twin pipe systems for directly buried hot water networks –
Part 1: Factory made twin pipe assembly of steel service pipes, polyurethane thermal insulation and one
casing of polyethylene;
— EN 15698-2, District heating pipes – Bonded twin pipe systems for directly buried hot water networks –
Part 2: Factory made fitting and valve assemblies of steel service pipes, polyurethane thermal insulation
and one casing of polyethylene;
— EN 17248, District heating and district cooling pipe systems – Terms and definitions.
1 Scope
This document specifies requirements and test methods for straight lengths of factory made thermally
insulated bonded single pipe assemblies for hot water networks in accordance with EN 13941-1, comprising
a steel service pipe, polyurethane foam thermal insulation and a casing of polyethylene.
The pipe assembly can also include the following additional elements: measuring wires, spacers and
diffusion barriers.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements 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 10204, Metallic products — Types of inspection documents
EN 10216-2, Seamless steel tubes for pressure purposes — Technical delivery conditions — Part 2: Non-alloy
and alloy steel tubes with specified elevated temperature properties
EN 10217-2, Welded steel tubes for pressure purposes — Technical delivery conditions — Part 2: Electric
welded non-alloy and alloy steel tubes with specified elevated temperature properties
EN 10217-5, Welded steel tubes for pressure purposes — Technical delivery conditions — Part 5: Submerged
arc welded non-alloy and alloy steel tubes with specified elevated temperature properties
EN 10220, Seamless and welded steel tubes — Dimensions and masses per unit length
EN 13941-1, District heating pipes — Design and installation of thermal insulated bonded single and twin pipe
systems for directly buried hot water networks — Part 1: Design
EN 14419, District heating pipes — Preinsulated bonded pipe systems for directly buried hot water networks —
Surveillance systems
EN 17248, District heating and district cooling pipe systems — Terms and definitions
EN ISO 845, Cellular plastics and rubbers — Determination of apparent density (ISO 845)
EN ISO 1133 (all parts), Plastics — Determination of the melt mass-flow rate (MFR) and melt volume-flow rate
(MVR) of thermoplastic (ISO 1133 series)
EN ISO 2505, Thermoplastics pipes — Longitudinal reversion — Test method and parameters (ISO 2505)
EN ISO 3126, Plastics piping systems — Plastics components — Determination of dimensions (ISO 3126)
EN ISO 4590, Rigid cellular plastics — Determination of the volume percentage of open cells and of closed cells
(ISO 4590)
EN ISO 6259-1, Thermoplastics pipes — Determination of tensile properties — Part 1: General test method (ISO
6259-1)
EN ISO 8497:1996, Thermal insulation — Determination of steady-state thermal transmission properties of
thermal insulation for circular pipes (ISO 8497:1994)
EN ISO 8501-1, Preparation of steel substrates before application of paints and related products — Visual
assessment of surface cleanliness — Part 1: Rust grades and preparation grades of uncoated steel substrates
and of steel substrates after overall removal of previous coatings (ISO 8501-1)
EN ISO 3127:2017, Thermoplastics pipes — Determination of resistance to external blows — Round-the-clock
method (ISO 3127:1994)
EN ISO 9080, Plastics piping and ducting systems — Determination of the long-term hydrostatic strength of
thermoplastics materials in pipe form by extrapolation (ISO 9080)
EN ISO 11357-6, Plastics — Differential scanning calorimetry (DSC) — Part 6: Determination of oxidation
induction time (isothermal OIT) and oxidation induction temperature (dynamic OIT) (ISO 11357-6)
EN ISO 12162, Thermoplastics materials for pipes and fittings for pressure applications — Classification,
designation and design coefficient (ISO 12162)
EN ISO 844, Rigid cellular plastics — Determination of compression properties
ISO 6761, Steel tubes — Preparation of ends of tubes and fittings for welding
ISO 6964, Polyolefin pipes and fittings — Determination of carbon black content by calcination and pyrolysis —
Test method
ISO 11414:2009, Plastics pipes and fittings — Preparation of polyethylene (PE) pipe/pipe or pipe/fitting test
piece assemblies by butt fusion
ISO 13953, Polyethylene (PE) pipes and fittings — Determination of the tensile strength and failure mode of
test pieces from a butt-fused joint
ISO 16770, Plastics — Determination of environmental stress cracking (ESC) of polyethylene — Full notch
creep test (FNCT)
ISO
...