ISO 22391-1:2007

INTERNATIONAL ISO
STANDARD 22391-1
First edition
2007-01-15

Plastics piping systems for hot and cold
water installations — Polyethylene of
raised temperature resistance (PE-RT) —
Part 1:
General
Systèmes de canalisations en plastique pour les installations d'eau
chaude et froide — Polyéthylène de meilleure résistance à la
température (PE-RT) —
Partie 1: Généralités




Reference number
ISO 22391-1:2007(E)
©
ISO 2007

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ISO 22391-1:2007(E)
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ii © ISO 2007 – All rights reserved

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ISO 22391-1:2007(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms, definitions, symbols and abbreviated terms. 2
3.1 Terms and definitions. 2
3.2 Symbols . 5
3.3 Abbreviated terms . 6
4 Classification of service conditions . 7
5 Material . 8
5.1 General. 8
5.2 Influence on water intended for human consumption. 8
5.3 Reprocessable material . 8
6 System performance requirement . 8
Bibliography . 9

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ISO 22391-1:2007(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 22391-1 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the
transport of fluids, Subcommittee SC 2, Plastics pipes and fittings for water supplies.
ISO 22391 consists of the following parts, under the general title Plastics piping systems for hot and cold
water installations — Polyethylene of raised temperature resistance (PE-RT):
⎯ Part 1: General
⎯ Part 2: Pipes
⎯ Part 3: Fittings
⎯ Part 5: Fitness for purpose of the system
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ISO 22391-1:2007(E)
Introduction
ISO 22391, the system standard, specifies the requirements for a piping system and its components when
made from polyethylene of raised temperature resistance (PE-RT). The piping system is intended to be used
for hot and cold water installations.
In respect of potential adverse effects on the quality of water intended for human consumption caused by the
products covered by ISO 22391:
a) no information is provided as to whether the products may be used without restriction;
b) existing national regulations concerning the use and/or characteristics of the products remain in force.
This part of ISO 22391 specifies the general aspects of the plastics piping system. At the time of its
publication, system standards for piping systems of other plastics materials used for the same application are
⎯ ISO 15874:2003, Plastics piping systems for hot and cold water installations — Polypropylene (PP),
⎯ ISO 15875:2003, Plastics piping systems for hot and cold water installations — Crosslinked polyethylene
(PE-X),
⎯ ISO 15876:2003, Plastics piping systems for hot and cold water installations — Polybutylene (PB), and
⎯ ISO 15877:2003, Plastics piping systems for hot and cold water installations — Chlorinated
poly(vinyl chloride) (PVC-C).

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INTERNATIONAL STANDARD ISO 22391-1:2007(E)

Plastics piping systems for hot and cold water installations —
Polyethylene of raised temperature resistance (PE-RT) —
Part 1:
General
1 Scope
This part of ISO 22391 specifies the general aspects of piping systems made of polyethylene of raised
temperature resistance (PE-RT), intended to be used for hot and cold water installations within buildings for
the conveyance of water — whether or not the water is intended for human consumption (domestic systems)
or heating systems — under specified design pressures and temperatures according to the class of
application.
It covers a range of service conditions (classes of application), design pressures and pipe dimension classes,
and also specifies test parameters and defines terms, symbols and abbreviated terms. When used in
conjunction with the other parts of ISO 22391, it is respectively applicable to PE-RT pipes, fittings, their joints,
and to joints having components of PE-RT as well as of other plastics and non-plastics materials, used for hot
and cold water installations.
It is not applicable for values of design temperature, maximum design temperature or malfunction temperature
in excess of those it specifies.
NOTE It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects,
taking into account their particular requirements and any relevant national regulations and installation practices or codes.
2 Normative references
The following referenced documents are indispensable for the application 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.
ISO 472, Plastics — Vocabulary
ISO 1043-1, Plastics — Symbols and abbreviated terms — Part 1: Basic polymers and their special
characteristics
ISO 4065, Thermoplastics pipes — Universal wall thickness table
ISO 22391-2:2006, Plastics piping systems for hot and cold water installations — Polyethylene of raised
temperature resistance (PE-RT) — Part 2: Pipes
ISO 22391-3:2006, Plastics piping systems for hot and cold water installations — Polyethylene of raised
temperature resistance (PE-RT) — Part 3: Fittings
ISO 22391-5:2006, Plastics piping systems for hot and cold water installations — Polyethylene of raised
temperature resistance (PE-RT) — Part 5: Fitness for purpose of the system
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ISO 22391-1:2007(E)
3 Terms, definitions, symbols and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 472 and ISO 1043-1 and the
following apply.
3.1.1 Geometrical terms and definitions
3.1.1.1
nominal size
DN
numerical designation of the size of a component, which is a convenient round number, approximately equal
to the manufacturing dimensions in millimetres (mm)
3.1.1.2
nominal size
DN/OD
nominal size, related to outside diameter
3.1.1.3
nominal outside diameter
d
n
specified diameter, in millimetres, assigned to a nominal size DN/OD
3.1.1.4
outside diameter (at any point)
d
e
measured outside diameter through the cross-section at any point of a pipe or spigot end of a fitting, rounded
up to the nearest 0,1 mm
3.1.1.5
mean outside diameter
d
em
measured length of the outer circumference of a pipe or spigot end of a fitting in any cross-section, divided by
π (= 3,142) rounded up t
...