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SLOVENSKI STANDARD
01-julij-2022
Nadomešča:
SIST EN 15632-4:2009
Cevi za daljinsko ogrevanje - Tovarniško izdelani gibki cevni sistemi - 4. del:
Vezane kovinske cevi - Zahteve in preskusne metode
District heating pipes - Factory made flexible pipe systems - Part 4: Bonded system with
metal service pipes; requirements and test methods
Fernwärmerohre - Werkmäßig gedämmte flexible Rohrsysteme - Teil 4:
Verbundmediumrohre aus Metall; Anforderungen und Prüfungen
Tuyaux de chauffage urbain - Systèmes de tuyaux flexibles manufacturés - Partie 4 :
Système bloqué avec tubes de service en métal ; exigences et méthodes d'essai
Ta slovenski standard je istoveten z: EN 15632-4:2022
ICS:
23.040.07 Cevovodi za daljinsko Pipeline and its parts for
ogrevanje in njihovi deli district heat
91.140.10 Sistemi centralnega Central heating systems
ogrevanja
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 15632-4
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2022
EUROPÄISCHE NORM
ICS 23.040.07 Supersedes EN 15632-4:2009
English Version
District heating pipes - Factory made flexible pipe systems
- Part 4: Bonded system with metal service pipes;
requirements and test methods
Tuyaux de chauffage urbain - Systèmes de tuyaux Fernwärmerohre - Werkmäßig gedämmte flexible
flexibles manufacturés - Partie 4 : Système bloqué avec Rohrsysteme - Teil 4: Verbundmediumrohre aus
tubes de service en métal ; exigences et méthodes Metall; Anforderungen und Prüfungen
d'essai
This European Standard was approved by CEN on 27 March 2022.
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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 15632-4:2022 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 Operating conditions . 6
5 Requirements . 6
5.1 General requirements . 6
5.2 Service pipes, fittings and their connections . 6
5.3 Axial shear strength of the pipe assemblies . 8
5.4 Linear water tightness of pipe assemblies . 8
5.5 Fittings . 8
5.6 Surveillance systems . 8
6 Test procedures . 8
6.1 General . 8
6.2 Axial shear strength of pipe assemblies . 8
6.2.1 General . 8
6.2.2 Test procedure . 9
6.3 Cycle test . 10
6.4 Linear water tightness of pipe assemblies . 11
Annex A (informative) Guideline for testing . 12
Bibliography . 14
European foreword
This document (EN 15632-4:2022) 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 November 2022, and conflicting national standards shall
be withdrawn at the latest by November 2022.
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 15632-4:2009.
This document is one of a series of standards which form several parts of EN 15632, District heating
pipes — Factory made flexible pipe systems:
— Part 1: Classification, general requirements and 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.
In comparison with EN 15632-4:2009, the following changes have been made:
a) change in the temperature in the scope;
b) changes in the steel qualities, including the referenced standards;
c) completely revised “guideline for testing” in the informative Annex A.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
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
District heating technology has developed rapidly since its origin and especially in recent times. Today,
there are different generations of district heating networks. The technologies of these generations are
driven by the different heat sources and operating temperatures used.
CEN/TC 107 provides a set of European standard series for rigid and flexible piping systems in district
heating to suit all generations and requirements of district heating networks in the market.
The standard documents ensure quality for pre-fabricated piping systems in district heating.
This standard series covers flexible, pre-fabricated piping systems for operation conditions as described
in the scope of part 1.
1 Scope
This document specifies requirements and test methods for flexible, factory made, buried district heating
pipe systems with metallic service pipes and bonding between the layers of the pipe assemblies and
thermal insulation materials of polyurethane or polyisocyanurate foam, the casing being made of
polyethylene.
It is only applicable in conjunction with part 1.
This document is applicable to pipes, fittings, their joints and to joints with components made of non-
plastics materials intended to be used for district heating installations.
This document is applicable to a continuous operating temperature up to 120 °C and a maximum
operating temperature of 140 °C for maximum 300 h/a, and a design pressure up to 2,5 MPa for a design
service life of at least 30 years.
This document does not apply to cover surveillance systems.
NOTE For higher temperatures or for the transport of other fluids, for example potable water, additional
requirements and testing is needed. Such requirements are not specified in this document.
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 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 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 10305-1, Steel tubes for precision applications - Technical delivery conditions - Part 1: Seamless cold
drawn tubes
EN 10305-2, Steel tubes for precision applications - Technical delivery conditions - Part 2: Welded cold
drawn tubes
EN 10305-3, Steel tubes for precision applications - Technical delivery conditions - Part 3: Welded cold sized
tubes
EN 12449, Copper and copper alloys - Seamless, round tubes for general purposes
EN 14419, District heating pipes - Bonded single and twin pipe systems for buried hot water networks -
Surveillance systems
EN 15632-1, District heating pipes - Pre-insulated flexible pipe systems - Part 1: Classification, general
requirements and test methods
EN 17248, District heating and district cooling pipe systems - Terms and definitions
EN ISO 3834-2, Quality requirements for fusion welding of metallic materials - Part 2: Comprehensive
quality requirements (ISO 3834-2)
EN ISO 10893-1, Non-destructive testing of steel tubes - Part 1: Automated electromagnetic testing of
seamless and welded (except submerged arc-welded) steel tubes for the verification of hydraulic
leaktightness (ISO 10893-1)
EN ISO 15607, Specification and qualification of welding procedures for metallic materials - General rules
(ISO 15607)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 17248 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at
— ISO Online browsing platform: available at
4 Operating conditions
Pipe systems according to this document shall have a lifetime of at least 30 years at a continuous
operating temperature of 120 °C and a maximum operating temperature of 140 °C for maximum 300 h/a
(see Table 1).
Table 1 — Design pressures
Design Pressure
Service pipe
1,6 MPa 2,5 MPa
Copper X -
Steel X X
Corrugated stainless steel X X
5 Requirements
5.1 General requirements
In addition to the general requirements specified in EN 15632-1, the following product specific
requirements apply.
5.2 Service pipes, fittings and their connections
The service pipes shall fulfil the requirements of diameter and wall thickness in Table 2.
Table 2 — Nominal diameters and minimum wall thickness
Outside diameter d , minimum inside diameter d , and minimum wall
2 1
Nominal
thickness s
diameter
Corrugated stainless
Copper Steel
a
steel
d d d
s s s
2 2 1
DN
mm mm mm
mm mm mm
b
12 15 1,0 - - 14 0,2
b
18 1,0 20 2,0 18 0,2
22 1,0 25 2,0 22 0,2
...