District heating pipes - Preinsulated bonded pipe systems for directly buried hot water networks - Steel valve assembly for steel service pipes, polyurethane thermal insulation and outer casing of polyethylene

This European Standard specifies requirements and test methods for valves of prefabricated thermally insulated valve assemblies comprising a steel valve, rigid polyurethane foam insulation and an outer casing of polyethylene for use in directly buried hot water networks with pre-insulated pipe assemblies in accordance with EN 253. This standard applies only to insulated valve assemblies for continuous operation with hot water at various temperatures in accordance with EN 253, Clause 1 and the valve assemblies with a maximum operation pressure of 25 bar. For higher pressures additional demands apply. Guidelines for quality inspection are given in Annex A of this standard. NOTE   For this application the following valve types are commonly used: ball valves, gate valves, and butterfly valves. This standard does not include calculation rules for loads and stresses. These depend on the configuration of the system as it is installed. The design and installation rules are given in EN 13941.

Fernwärmerohre - Werkmäßig gedämmte Verbundmantelrohrsysteme für direkt erdverlegte Fernwärmenetze - Vorgedämmte Absperrarmaturen für Stahlmediumrohre mit Polyurethan-Wärmedämmung und Außenmantel aus Polyethylen

Tuyaux de chauffage urbain - Systèmes bloqués de tuyaux préisolés pour les réseaux d'eau chaude enterrés directement - Robinets préisolés pour tubes de service en acier, isolation thermique en polyuréthane et tube de protection en polyéthylène

Cevi za daljinsko ogrevanje - Izolirani vezani cevni sistemi za podzemeljska toplovodna omrežja - Sestav jeklenih ventilov za jeklene cevi, poliuretanske toplotne izolacije in zunanjega polietilenskega plašča

General Information

Status
Not Published
ICS
23.060.01 - Valves in general
Technical Committee
CEN/TC 107 - Pre-fabricated district heating pipe systems
Drafting Committee
CEN/TC 107/WG 5 - Fittings and valves
Current Stage
5060 - Closure of Vote - Formal Approval
Start Date
29-Oct-2013
Due Date
19-Jun-2014
Completion Date
29-Oct-2013
Ref Project
SIST EN 488:2011/oprA1:2012 - District heating pipes - Preinsulated bonded pipe systems for directly buried hot water networks - Steel valve assembly for steel service pipes, polyurethane thermal insulation and outer casing of polyethylene

Relations

Merged Into
EN 488:2011+A1:2014 - District heating pipes - Preinsulated bonded pipe systems for directly buried hot water networks - Steel valve assembly for steel service pipes, polyurethane thermal insulation and outer casing of polyethylene
Effective Date
19-Jan-2023
Amends
EN 488:2011 - District heating pipes - Preinsulated bonded pipe systems for directly buried hot water networks - Steel valve assembly for steel service pipes, polyurethane thermal insulation and outer casing of polyethylene
Effective Date
17-Sep-2011

Overview

EN 488:2011/FprA1 is a CEN European Standard covering district heating pipes and specifically the requirements and test methods for preinsulated bonded steel valve assemblies used in directly buried hot water networks. It applies to prefabricated thermally insulated valve assemblies that combine a steel valve, rigid polyurethane (PU) foam insulation, and an outer casing of polyethylene for continuous hot-water service in accordance with EN 253. The standard addresses valve assemblies rated up to 25 bar (higher pressures require additional demands) and includes guidance on quality inspection (Annex A).

Key topics and requirements

  • Scope of application
    • Prefabricated insulated valve assemblies for directly buried hot water networks (EN 253, Clause 1).
    • Continuous operation with hot water; common valve types: ball valves, gate valves, butterfly valves.
  • Materials and construction
    • Steel valve body paired with PU thermal insulation and PE outer casing.
    • Updated stem-construction requirements (Amendment A1):
      • Stem outside insulation shall be either stainless steel (EN 10088-1) with minimum 16% Cr, or carbon steel protected by a paint system classified as “high” durability (>15 years) per EN ISO 12944-5.
      • Suitable for underground corrosivity categories Im1–Im3 and atmospheric categories C5-M and C5-I (EN ISO 12944-2).
  • Performance and testing
    • Specified test methods for valves of insulated assemblies to ensure leak-tightness, thermal performance and mechanical integrity.
  • Limitations
    • Does not include calculation rules for loads and stresses (these depend on in-situ configuration).
    • Design and installation rules are covered by EN 13941.
  • Quality inspection
    • Annex A provides guidelines for manufacturing and inspection practices.

Applications

  • Design, manufacture and testing of preinsulated valve assemblies for district heating networks and other buried hot-water distribution systems.
  • Use where corrosion resistance, thermal insulation continuity and mechanical protection of service valves are critical.
  • Applicable to project specifications, procurement, factory production control and site acceptance testing of insulated valve units.

Who should use this standard

  • Manufacturers of preinsulated bonded pipe systems and prefabricated valve assemblies
  • Valve designers and material engineers
  • District heating system designers, installers and asset owners
  • Test laboratories, certification bodies and procurement/specification teams

Related standards

  • EN 253 - Preinsulated bonded pipe systems for district heating
  • EN 13941 - Design and installation rules for buried preinsulated pipes
  • EN 10088-1 - Stainless steels (material designation)
  • EN ISO 12944-2 / EN ISO 12944-5 - Corrosion protection by paint systems

Keywords: EN 488:2011/FprA1, district heating pipes, preinsulated bonded pipe systems, steel valve assembly, polyurethane insulation, polyethylene outer casing, directly buried hot water networks.

Frequently Asked Questions

EN 488:2011/FprA1 is a draft published by the European Committee for Standardization (CEN). Its full title is "District heating pipes - Preinsulated bonded pipe systems for directly buried hot water networks - Steel valve assembly for steel service pipes, polyurethane thermal insulation and outer casing of polyethylene". This standard covers: This European Standard specifies requirements and test methods for valves of prefabricated thermally insulated valve assemblies comprising a steel valve, rigid polyurethane foam insulation and an outer casing of polyethylene for use in directly buried hot water networks with pre-insulated pipe assemblies in accordance with EN 253. This standard applies only to insulated valve assemblies for continuous operation with hot water at various temperatures in accordance with EN 253, Clause 1 and the valve assemblies with a maximum operation pressure of 25 bar. For higher pressures additional demands apply. Guidelines for quality inspection are given in Annex A of this standard. NOTE For this application the following valve types are commonly used: ball valves, gate valves, and butterfly valves. This standard does not include calculation rules for loads and stresses. These depend on the configuration of the system as it is installed. The design and installation rules are given in EN 13941.

This European Standard specifies requirements and test methods for valves of prefabricated thermally insulated valve assemblies comprising a steel valve, rigid polyurethane foam insulation and an outer casing of polyethylene for use in directly buried hot water networks with pre-insulated pipe assemblies in accordance with EN 253. This standard applies only to insulated valve assemblies for continuous operation with hot water at various temperatures in accordance with EN 253, Clause 1 and the valve assemblies with a maximum operation pressure of 25 bar. For higher pressures additional demands apply. Guidelines for quality inspection are given in Annex A of this standard. NOTE For this application the following valve types are commonly used: ball valves, gate valves, and butterfly valves. This standard does not include calculation rules for loads and stresses. These depend on the configuration of the system as it is installed. The design and installation rules are given in EN 13941.

EN 488:2011/FprA1 is classified under the following ICS (International Classification for Standards) categories: 23.060.01 - Valves in general. The ICS classification helps identify the subject area and facilitates finding related standards.

EN 488:2011/FprA1 has the following relationships with other standards: It is inter standard links to EN 488:2011+A1:2014, EN 488:2011. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

You can purchase EN 488:2011/FprA1 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 CEN standards.

Standards Content (Sample)


SLOVENSKI STANDARD
01-oktober-2012
&HYL]DGDOMLQVNRRJUHYDQMH,]ROLUDQLYH]DQLFHYQLVLVWHPL]DSRG]HPHOMVND
WRSORYRGQDRPUHåMD6HVWDYMHNOHQLKYHQWLORY]DMHNOHQHFHYLSROLXUHWDQVNH
WRSORWQHL]RODFLMHLQ]XQDQMHJDSROLHWLOHQVNHJDSODãþD
District heating pipes - Preinsulated bonded pipe systems for directly buried hot water
networks - Steel valve assembly for steel service pipes, polyurethane thermal insulation
and outer casing of polyethylene
Fernwärmerohre - Werkmäßig gedämmte Verbundmantelrohrsysteme für direkt
erdverlegte Fernwärmenetze - Vorgedämmte Absperrarmaturen für Stahlmediumrohre
mit Polyurethan-Wärmedämmung und Außenmantel aus Polyethylen
Tuyaux de chauffage urbain - Systèmes bloqués de tuyaux préisolés pour les réseaux
d'eau chaude enterrés directement - Robinets préisolés pour tubes de service en acier,
isolation thermique en polyuréthane et tube de protection en polyéthylène
Ta slovenski standard je istoveten z: EN 488:2011/prA1
ICS:
23.040.10 Železne in jeklene cevi Iron and steel pipes
23.060.01 Ventili na splošno Valves in general
91.140.65 Oprema za ogrevanje vode Water heating equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
DRAFT
EN 488:2011
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA1
August 2012
ICS 23.060.01
English Version
District heating pipes - Preinsulated bonded pipe systems for
directly buried hot water networks - Steel valve assembly for
steel service pipes, polyurethane thermal insulation and outer
casing of polyethylene
Tuyaux de chauffage urbain - Systèmes bloqués de tuyaux Fernwärmerohre - Werkmäßig gedämmte
préisolés pour les réseaux d'eau chaude enterrés Verbundmantelrohrsysteme für direkt erdverlegte
directement - Robinets préisolés pour tubes de service en Fernwärmenetze - Vorgedämmte Absperrarmaturen für
acier, isolation thermique en polyuréthane et tube de Stahlmediumrohre mit Polyurethan-Wärmedämmung und
protection en polyéthylène Außenmantel aus Polyethylen
This draft amendment is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 107.

This draft amendment A1, if approved, will modify the European Standard EN 488:2011. If this draft becomes an amendment, CEN
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of this amendment
into the relevant national standard without any alteration.

This draft amendment 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, 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.
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.

EUR
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.

Loading comments...