ISO 22391-2:2007
(Main)Plastics piping systems for hot and cold water installations — Polyethylene of raised temperature resistance (PE-RT) — Part 2: Pipes
Plastics piping systems for hot and cold water installations — Polyethylene of raised temperature resistance (PE-RT) — Part 2: Pipes
This part of ISO 22391 specifies the characteristics of pipe made from 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 the design pressures and temperatures appropriate to the class of application according to ISO 22391-1. It covers a range of service conditions (classes of application), design pressures and pipe dimension classes, and also specifies test parameters and test methods. 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 applicable to pipes with or without a barrier layer or layers. It is not applicable for values of design temperature, maximum design temperature or malfunction temperature in excess of those specified in ISO 22391-1. 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.
Systèmes de canalisations en plastique pour les installations d'eau chaude et froide — Polyéthylène de meilleure résistance à la température (PE-RT) — Partie 2: Tubes
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 22391-2
First edition
2007-01-15
Plastics piping systems for hot and cold
water installations — Polyethylene of
raised temperature resistance (PE-RT) —
Part 2:
Pipes
Systèmes de canalisations en plastique pour les installations d'eau
chaude et froide — Polyéthylène de meilleure résistance à la
température (PE-RT) —
Partie 2: Tubes
Reference number
ISO 22391-2:2007(E)
©
ISO 2007
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ISO 22391-2:2007(E)
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ii © ISO 2007 – All rights reserved
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ISO 22391-2:2007(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms, definitions, symbols and abbreviated terms. 2
4 Material . 2
4.1 Pipe material. 2
4.2 Evaluation of σ values. 2
LPL
4.3 Influence on water intended for human consumption. 4
5 General characteristics . 4
5.1 Appearance . 4
5.2 Opacity. 4
6 Geometrical characteristics. 5
6.1 General. 5
6.2 Dimensions of pipe. 5
7 Mechanical characteristics . 8
8 Physical and chemical characteristics. 9
9 System performance requirements . 9
10 Marking . 9
10.1 General requirements. 9
10.2 Minimum required marking. 10
Annex A (informative) Derivation of S . 11
calc,max
Bibliography . 13
© ISO 2007 – All rights reserved iii
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ISO 22391-2:2007(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 22391-2 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 22391-2:2007(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 characteristics of pipes. 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 22391-2:2007(E)
Plastics piping systems for hot and cold water installations —
Polyethylene of raised temperature resistance (PE-RT) —
Part 2:
Pipes
1 Scope
This part of ISO 22391 specifies the characteristics of pipe made from 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 the design pressures and temperatures appropriate to the class of application
according to ISO 22391-1.
It covers a range of service conditions (classes of application), design pressures and pipe dimension classes,
and also specifies test parameters and test methods. 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 applicable to pipes with or without a barrier layer or layers.
It is not applicable for values of design temperature, maximum design temperature or malfunction temperature
in excess of those specified in ISO 22391-1.
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 1133:2005, Plastics — Determination of the melt mass-flow rate (MFR) and the melt volume-flow rate
(MVR) of thermoplastics
ISO 1167-1:2006, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids — Determination
of the resistance to internal pressure — Part 1: General method
ISO 1167-2:2006, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids — Determination
of the resistance to internal pressure — Part 2: Preparation of pipe test pieces
ISO 2505:2005, Thermoplastics pipes — Longitudinal reversion — Test method and parameters
ISO 3126:2005, Plastics piping systems — Plastics components — Determination of dimensions
ISO 7686:2005, Plastics pipes and fittings — Determination of opacity
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ISO 22391-2:2007(E)
ISO 9080, Plastics piping and ducting systems — Determination of long-term hydrostatic strength of
thermoplastic materials in pipe form by extrapolation
ISO 13760, Plastics pipes for the conveyance of fluids under pressure — Miner's rule — Calculation method
for cumulative damage
ISO 22391-1:2006, Plastics piping systems for hot and cold water installations — Polyethylene of raised
temperature resistance (PE-RT) — Part 1: General
ISO 22391-3, Plastics piping systems for hot and cold water installations — Polyethylene of raised
temperature resistance (PE-RT) — Part 3: Fittings
ISO 22391-5, Plastics piping systems for hot and cold water installations — Polyethylene of raised
temperature resistance (PE-RT) — Part 5: Fitness for purpose of the system
3 Terms, definitions, symbols and abbreviated terms
For the purposes of this document, the terms, definitions, symbols and abbreviated terms given in
ISO 22391-1 apply.
4 Material
4.1 Pipe material
The material of which the pipe is made shall be polyethylene of raised temperature resistance (PE-RT).
4.2 Evaluation of σ values
LPL
The pipe material shall be evaluated in accordance with ISO 9080 or equivalent, with internal pressure tests
being carried out in accordance with ISO 1167-1 and ISO 1167-2, in order to determine the σ values. The
LPL
σ value thus determined shall be at least as high as the corresponding values of the reference curves
LPL
given in Figure 1 (taken from ISO 24033) over the complete range of times.
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ISO 22391-2:2007(E)
Key
X1 time, t, to fracture, h
X2 years
Y hoop stress, σ, MPa
Figure 1 — Expected strength of PE-RT pipes
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ISO 22391-2:2007(E)
NOTE 1 One equivalent way of evaluation is to calculate the σ value for each temperature (for example 20 °C,
LPL
60 °C and 95 °C), individually.
NOTE 2 The reference curves in Figure 1 in the temperature range of 10 °C to 95 °C are derived from Equations (1)
and (2).
First branch (i.e. the left-hand portion of the lines shown in Figure 1):
58219,035 logσ
78763,07
log t=−190,481− 119+ +,877logσ (1)
T
T
Second branch (i.e. the right-hand portion of the lines shown in Figure 1):
1723,318 logσ 11150,56
log t=−23,7954− + (2)
TT
In
...
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