SIST EN ISO 23856:2021

SLOVENSKI STANDARD
oSIST prEN ISO 23856:2019
01-september-2019
Cevni sistemi iz polimernih materialov za odvodnjavanje ali kanalizacijo in oskrbo
z vodo, s tlakom in brez njega - S steklenimi vlakni ojačeni duromerni materiali
(GRP) na osnovi nenasičene poliestrske smole (UP) (ISO/DIS 23856:2019)
Plastics piping systems for pressure and non-pressure water supply, drainage or
sewerage - Glass-reinforced thermosetting plastics (GRP) systems based on
unsaturated polyester (UP) resin (ISO/DIS 23856:2019)
Systèmes de canalisation en matières plastiques pour les branchements et les
collecteurs d'assainissement avec ou sans pression - Systèmes en plastiques
thermodurcissables renforcés de verre (PRV) à base de résine de polyester non saturé
(UP) (ISO/DIS 23856:2019)
Ta slovenski standard je istoveten z: prEN ISO 23856
ICS:
23.040.05 Cevovodi za zunanje Pipeline and its parts for
sisteme za odpadno vodo in external sewage systems
njihovi deli
83.120 Ojačani polimeri Reinforced plastics
91.140.80 Drenažni sistemi Drainage systems
93.030 Zunanji sistemi za odpadno External sewage systems
vodo
oSIST prEN ISO 23856:2019 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 23856:2019

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oSIST prEN ISO 23856:2019
DRAFT INTERNATIONAL STANDARD
ISO/DIS 23856
ISO/TC 138/SC 6 Secretariat: ASI
Voting begins on: Voting terminates on:
2019-06-13 2019-09-05
Plastics piping systems for pressure and non-pressure
water supply, drainage or sewerage — Glass-reinforced
thermosetting plastics (GRP) systems based on
unsaturated polyester (UP) resin
ICS: 23.040.20; 91.140.80; 93.030
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 23856:2019(E)
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. ISO 2019

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oSIST prEN ISO 23856:2019
ISO/DIS 23856:2019(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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ii © ISO 2019 – All rights reserved

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oSIST prEN ISO 23856:2019
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Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 2
3 Terms and definitions . 3
4 General .12
4.1 Classification .12
4.1.1 Categories .12
4.1.2 Nominal size .12
4.1.3 Nominal stiffness .12
4.1.4 Nominal pressure .13
4.2 Materials .13
4.2.1 General.13
4.2.2 Reinforcement .14
4.2.3 Resin .14
4.2.4 Aggregates and fillers .14
4.2.5 Thermoplastics liners .14
4.2.6 Elastomers .14
4.2.7 Metals .14
4.3 Wall construction .15
4.3.1 Inner layer .15
4.3.2 Structural layer .15
4.3.3 Outer layer .15
4.4 Appearance .15
4.5 Reference conditions for testing .15
4.5.1 Temperature .15
4.5.2 Properties of water for testing .15
4.5.3 Loading conditions . .16
4.5.4 Conditioning .16
4.5.5 Measurement of dimensions .16
4.6 Elapsed time, x, for determination of long-term properties .16
4.7 Joints .16
4.7.1 General.16
4.7.2 Types of joint .16
4.7.3 Flexibility of the joint .16
4.7.4 Sealing ring .17
4.7.5 Adhesives . .17
4.8 Effect on water quality .17
4.9 Assessment of conf ormity .17
5 Pipes .17
5.1 Type of pipes .17
5.2 Geometrical characteristics .18
5.2.1 Diameter .18
5.2.2 Wall thickness .23
5.2.3 Length.23
5.3 Mechanical characteristics.24
5.3.1 Initial specific ring stiffness .24
5.3.2 Long-term specific ring stiffness under wet conditions .24
5.3.3 Initial resistance to failure in a deflected condition .25
5.3.4 Ultimate long-term resistance to failure in a deflected condition.27
5.3.5 Initial specific longitudinal tensile strength .28
5.3.6 Initial design and failure pressures for pressure pipes .30
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5.3.7 Long-term failure pressure .32
5.4 Resistance to strain corrosion .33
5.4.1 General.33
5.4.2 Procedure using failure points .33
5.4.3 Procedure using specified levels of strain.34
5.4.4 Test piece length.35
5.4.5 Test solution.35
5.5 Marking .35
6 Fittings .36
6.1 All types .36
6.1.1 General.36
6.1.2 Diameter series .36
6.1.3 Nominal pressure (PN) . .36
6.1.4 Nominal stiffness (SN) .36
6.1.5 Fitting type .36
6.1.6 Mechanical characteristics of fittings .36
6.1.7 Installed leaktightness of fittings .37
6.1.8 Dimensions .37
6.2 Bends .37
6.2.1 Classification of bends .37
6.2.2 Dimensions and tolerances of bends .38
6.3 Branches .41
6.3.1 Classification of branches.41
6.3.2 Dimensions and tolerances of branches .41
6.4 Reducers .44
6.4.1 Classification of reducers .44
6.4.2 Dimensions and tolerances of reducers .44
6.5 Non pressure saddles .46
6.5.1 Classification of saddles .46
6.5.2 Dimensions of saddles and associated tolerances .47
6.6 Flanges .47
6.6.1 Classification of flanges .47
6.6.2 Dimensions and tolerances for adaptors .48
6.7 Marking .50
7 Joint performance .50
7.1 General .50
7.1.1 Interchangeability . . .50
7.1.2 Requirements .50
7.1.3 Test temperature .51
7.1.4 Non-pressure piping and joints .51
7.1.5 Dimensions .51
7.2 Flexible joints .51
7.2.1 General.51
7.2.2 Maximum allowable draw .51
7.2.3 Maximum allowable angular deflection .51
7.2.4 Flexible non-end-load-bearing joints with elastomeric sealing rings .51
7.2.5 Flexible end-load-bearing joints with elastomeric sealing rings .52
7.3 Rigid joints .52
7.3.1 Wrapped or cemented . .52
7.3.2 Bolted flange joints .53
7.4 Marking .53
Annex A (normative) Principles used to establish the design requirements based on
regression testing and consideration of the variability of the product.55
Bibliography .60
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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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see the following
URL: www .iso .org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for
the transport of fluids, Subcommittee SC 6, Reinforced plastics pipes and fittings for all applications.
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Introduction
This system standard is a result of merging ISO 10639, ISO 10467 as well as EN 1796 and EN 14364.
As these standards were almost identical, except for the requirement on chemical resistance of sewer
pipes, it was decided that it would be beneficial for the user and make his work easier to refer only to
one document.
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oSIST prEN ISO 23856:2019
DRAFT INTERNATIONAL STANDARD ISO/DIS 23856:2019(E)
Plastics piping systems for pressure and non-pressure
water supply, drainage or sewerage — Glass-reinforced
thermosetting plastics (GRP) systems based on
unsaturated polyester (UP) resin
1 Scope
This document specifies the properties of piping system components made from glass-reinforced
thermosetting plastics (GRP) based on unsaturated polyester resin (UP). It is suited for all types of
water supply, drainage and sewerage with or without pressure. Types of water supply include, but are
not limited to, raw water, irrigation, cooling water, potable water, salt water, sea water, penstocks in
power plants, processing plants and other water-based applications. This document is applicable to
GRP UP piping systems, with flexible or rigid joints with or without end thrust load-bearing capability,
primarily intended for use in direct buried installations.
NOTE 1 For the purpose of this document, the term polyester resin (UP) also includes vinyl-ester resins (VE).
NOTE 2 Piping systems conforming to this document can also be used for non-buried applications, provided
the influence of the environment and the supports are considered in the design of the pipes, fittings and joints.
NOTE 3 This document can also apply for other installations, such as slip-lining rehabilitation of existing pipes.
NOTE 4 This document is also referenced in ISO 25780, which specifies requirements for GRP-pipes used for
jacking installation.
The requirements for the hydrostatic pressure design of pipes referring to this document meet the
requirements of ISO/TS 20656-1 and the general principle for the reliability of structures detailed in
ISO 2394 and in EN 1990. These International Standards provide procedures for the harmonization of
design practices and address the probability of failure, as well as possible consequences of failures. The
design practices are based on a partial safety factor concept, as well as on risk management engineering.
This document is applicable to pipes, fittings and their joints of nominal sizes from DN 50 to DN 4000
which are intended to be used for the conveyance of water at temperatures up to 50 °C, with or without
pressure. In a pipework system, pipes and fittings of different nominal pressure and stiffness ratings
may be used together. Clause 4 specifies the general aspects of GRP UP piping systems intended to be
used in the field of drainage or sewerage with or without pressure.
Clause 5 specifies the characteristics of pipes made from GRP UP with or without aggregates and/or
fillers. The pipes may have a thermoplastics or thermosetting resin liner. Clause 5 also specifies the test
parameters for the test methods referred to in this document.
Clause 6 specifies the characteristics of fittings made from GRP UP, with or without a thermoplastics or
thermosetting resin liner, intended to be used in the field of drainage and sewerage. Clause 6 specifies
the dimensional and performance requirements for bends, branches, reducers, saddles and flanged
adaptors. Clause 6 covers requirements to prove the structural design of fittings. It is applicable to
fittings made using any of the following techniques:
— fabrication from straight pipes;
— moulding by
1) filament winding,
2) tape winding,
3) contact moulding, and
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4) hot or cold compression moulding.
Clause 7 is applicable to the joints to be used in GRP UP piping systems to be used for the conveyance of
surface water and sewerage, both buried and non-buried. It covers requirements to prove the design of
the joint. Clause 7 specifies type test performance requirements for the following joints as a function of
the declared nominal pressure rating of the pipeline or system:
a) socket-and-spigot (including double-socket) joints or mechanical joints;
b) locked socket-and-spigot joints;
c) cemented or wrapped joints;
d) bolted flange joints.
2 Normative references
The following documents are r
...