oSIST prEN 488-2:2023

SLOVENSKI STANDARD
oSIST prEN 488-2:2023
01-september-2023
Cevi za daljinsko ogrevanje in daljinsko hlajenje - Vezani cevni sistemi za
neposredno vkopana omrežja tople in hladne vode - Tovarniško izdelan sestav
jeklenih ventilov za praznjenje in odzračevanje, poliuretanska toplotna izolacija in
polietilenski plašč
District heating and district cooling pipes - Bonded pipe systems for directly buried hot
and cold water networks - Factory made steel valve assembly for draining and venting,
polyurethane thermal insulation and a casing of polyethylene
Fernwärmerohre - Rohr-Verbundsysteme für erdverlegte Fernwärme- und
Fernkältenetze - Teil 2: Werkmäßig gefertigte Baueinheiten für Entleerungs- und
Entlüftungsarmaturen bestehend aus Stahl, einer Wärmedämmung aus Polyurethan und
einer Ummantelung aus Polyethylen
Tuyaux de chauffage urbain et réseaux d'eau glacée - Systèmes bloqués de tuyaux
préisolés pour les réseaux d'eau chaude et froide enterrés directement - Partie 2 :
Assemblages d'appareils de robinetterie en acier manufacturés pour vidanges et purges,
isolation thermique en polyuréthane et enveloppe en polyéthylène
Ta slovenski standard je istoveten z: prEN 488-2
ICS:
23.040.07 Cevovodi za daljinsko Pipeline and its parts for
ogrevanje in njihovi deli district heat
23.060.01 Ventili na splošno Valves in general
oSIST prEN 488-2:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 488-2:2023

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oSIST prEN 488-2:2023


DRAFT
EUROPEAN STANDARD
prEN 488-2
NORME EUROPÉENNE

EUROPÄISCHE NORM

July 2023
ICS 23.040.07; 23.060.01
English Version

District heating and district cooling pipes - Bonded pipe
systems for directly buried hot and cold water networks -
Part 2: Factory made steel valve assembly for draining and
venting, polyurethane thermal insulation and a casing of
polyethylene
 Fernwärmerohre - Verbund-Rohrsysteme für
erdverlegte Fernwärme- und Fernkältenetze - Teil 2:
Werkmäßig gefertigte Baueinheiten für Entleerungs-
und Entlüftungsarmaturen bestehend aus Stahl, einer
Wärmedämmung aus Polyurethan und einer
Ummantelung aus Polyethylen
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 107.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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, Türkiye and
United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.


EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 488-2:2023 E
worldwide for CEN national Members.

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oSIST prEN 488-2:2023
prEN 488-2:2023 (E)
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Requirements . 6
4.1 General . 6
4.2 Steel valves . 7
4.2.1 Pressure ratings for steel valves . 7
4.2.2 Service temperatures for steel valves . 7
4.3 Metallic parts . 7
4.3.1 Specification . 7
4.3.2 Steel valve . 8
4.3.3 Valve extension pipe . 8
4.3.4 Surface conditions . 8
4.3.5 Accessory. 8
4.3.6 Welding of steel parts . 9
4.4 Casing . 9
4.4.1 General . 9
4.4.2 Welding of polyethylene . 9
4.5 Sealing component . 9
4.6 Polyurethane (PUR) foam thermal insulation . 9
4.7 Valve assembly . 9
4.7.1 General . 9
4.7.2 End of valve assembly . 9
4.7.3 Metallic parts out of the casing .10
4.7.4 Leak-tightness of the casing .10
4.7.5 Thermal insulation series .10
4.7.6 Main dimensions of the valve assembly .10
4.8 Expected thermal life and long term temperature resistance .10
4.9 Thermal conductivity .10
4.10 Surface conditions at delivery .10
4.11 Measuring wires for surveillance systems .11
4.12 Installation, operation and maintenance .11
4.12.1 Installation .11
4.12.2 Operation .11
4.12.3 Maintenance .11
5 Marking .11
5.1 General .11
5.2 Steel valve .11
5.3 Casing .11
5.4 Valve assembly .11
Annex A (informative) Inspection and testing .12
A.1 General .12
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oSIST prEN 488-2:2023
prEN 488-2:2023 (E)
A.2 Manufacturer’s quality control . 12
A.3 Additional inspection . 12
A.4 Manufacturer’s responsibility . 12
Annex B (informative) Waste treatment and recycling . 13
Bibliography . 14

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oSIST prEN 488-2:2023
prEN 488-2:2023 (E)
European foreword
This document (prEN 488-2:2023) has been prepared by Technical Committee CEN/TC 107
“Prefabricated district heating and district cooling pipe system”, the secretariat of which is held by DS.
This document is currently submitted to the CEN Enquiry.
The EN 488 series is currently composed of the following parts:
— prEN 488-1, District heating pipes - Bonded single pipe systems for directly buried hot water networks
- Part 1: Factory made steel valve assembly for steel service pipes, polyurethane thermal insulation and
a casing of polyethylene (this document);
— prEN 488-2, District heating and district cooling pipes - Bonded pipe systems for directly buried hot and
cold water networks - Part 2: Factory made steel valve assembly for draining and venting, polyurethane
thermal insulation and a casing of polyethylene.
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oSIST prEN 488-2:2023
prEN 488-2:2023 (E)
Introduction
prEN 488-2 has been aligned with prEN 488-1 and other relevant European Standards.
Other standards from CEN/TC 107 are:
— EN 253, 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
— prEN 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
— prEN 488-1, District heating pipes — Bonded single pipe systems for directly buried hot water networks
— Part 1: 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 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 buried hot water networks
— Surveillance systems
— EN 15632 (all parts), District heating pipes — Factory made flexible pipe systems
— prEN 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
— prEN 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
— EN 17414 (all parts), District cooling pipes — Factory made flexible pipe systems
— EN 17415 (all parts), District cooling pipes — Bonded single pipe systems for directly buried cold water
networks
— EN 17878 (all parts), District heating pipes — Factory made flexible pipe systems with a lower
temperature profile
Waste management and recycling of materials is dealt with in Annex B.
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oSIST prEN 488-2:2023
prEN 488-2:2023 (E)
1 Scope
This document specifies requirements for factory made thermally insulated bonded valve assemblies for
draining and venting for directly buried hot and cold water networks in accordance with EN 13941-1,
comprising a steel valve, steel service pipe, polyurethane (PUR) foam thermal insulation and a casing of
polyethylene (PE).
The valve 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 req
...