SIST EN ISO 11295:2022

SLOVENSKI STANDARD
oSIST prEN ISO 11295:2021
01-marec-2021
Cevni sistemi iz polimernih materialov za obnovo cevovodov - Razvrstitev in
pregled strateških in operativnih dejavnosti (ISO/DIS 11295:2021)
Plastics piping systems used for the rehabilitation of pipelines - Classification and
overview of strategic and operational activities (ISO/DIS 11295:2021)
Kunststoff-Rohrleitungssysteme, die für die Sanierung verwendet werden -
Klassifizierung und Überblick über strategische und operative Aktivitäten (ISO/DIS
11295:2021)
Systèmes de canalisation en plastique destinés à la réhabilitation des réseaux enterrés -
Classification et vue d’ensemble des activités stratégiques et opérationnelles (ISO/DIS
11295:2021)
Ta slovenski standard je istoveten z: prEN ISO 11295
ICS:
23.040.01 Deli cevovodov in cevovodi Pipeline components and
na splošno pipelines in general
oSIST prEN ISO 11295:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 11295:2021

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oSIST prEN ISO 11295:2021
DRAFT INTERNATIONAL STANDARD
ISO/DIS 11295
ISO/TC 138/SC 8 Secretariat: JISC
Voting begins on: Voting terminates on:
2021-02-01 2021-04-26
Plastics piping systems used for the rehabilitation of
pipelines — Classification and overview of strategic and
operational activities
Systèmes de canalisation en plastique destinés à la réhabilitation des réseaux enterrés — Classification et
vue d’ensemble des activités stratégiques et opérationnelles
ICS: 23.040.01; 23.040.01
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 11295:2021(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 2021

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oSIST prEN ISO 11295:2021
ISO/DIS 11295:2021(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
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ii © ISO 2021 – All rights reserved

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oSIST prEN ISO 11295:2021
ISO/DIS 11295:2021(E)

Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2  Normative references . 1
3  Terms and definitions . 1
3.1 General . 2
3.2 Techniques . 3
3.3 Service conditions . 5
4  Abbreviated terms . 5
5 Pipeline rehabilitation process . 6
6  Investigation and condition assessment of the existing pipeline .6
6.1 Performance criteria . 6
6.1.1 General. 6
6.1.2 Hydraulic requirements . . 7
6.1.3 Structural requirements . 8
6.1.4 Environmental requirement . 8
6.1.5 Operational requirements . 8
6.2 Investigation of performance . 8
6.2.1 General. 8
6.2.2 Hydraulic investigation .10
6.2.3 Structural investigation .10
6.2.4 Environmental investigation .10
6.2.5 Operational investigation .11
6.3 Condition assessment .11
6.4 Risk analysis .11
6.5 Control measures .12
7  Classification and characteristics of rehabilitation techniques .12
7.1 Classification of renovation techniques.14
7.1.1 General.14
7.1.2 Lining with continuous pipes .14
7.1.3 Lining with close-fit pipes .16
7.1.4 Lining with cured-in-place pipes .20
7.1.5 Lining with discrete pipes.22
7.1.6 Lining with adhesive-backed hoses .25
7.1.7 Lining with spirally-wound pipes .27
7.1.8 Lining with pipe segments .30
7.1.9 Lining with a rigidly anchored plastics inner layer .31
7.1.10 Lining with sprayed polymeric materials .33
7.1.11 Lining with inserted hoses .35
7.2 Classification of trenchless replacement techniques .36
7.2.1 General.36
7.2.2 Pipe bursting .37
7.2.3 Pipe removal .39
7.2.4 Horizontal directional drilling — HDD .41
7.2.5 Impact moling .44
7.2.6 Pipe jacking .46
8  Selection of rehabilitation techniques .49
8.1 General .49
8.2 Pipeline system layout .49
8.3 Hydraulic performance .50
8.4 Structural performance .51
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oSIST prEN ISO 11295:2021
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8.4.1 General.51
8.4.2 Non-pressure pipes .51
8.4.3 Pressure pipes .52
8.5 Environmental impact .55
8.6 Construction constraints .56
8.7 Project specification .56
9  Implementation of rehabilitation techniques .57
9.1 Preconstruction activities .57
9.2 Inspection, storage and handling of the materials on site .58
9.3 Application of rehabilitation technique .58
9.3.1 Preparatory work .58
9.3.2 Construction .58
9.4 Acceptance control .59
9.4.1 General.59
9.4.2 Inspection .59
9.4.3 Leak tightness testing .59
9.4.4 Sampling.61
9.5 Completion of the work .61
9.5.1 Finishing off the rehabilitation work .61
9.5.2 Lateral reinstatement .61
9.6 Documentation of the process .61
Bibliography .62
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oSIST prEN ISO 11295:2021
ISO/DIS 11295:2021(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.
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 ISO/TC 138 Plastics pipes, fittings and valves for the transport of fluids,
Subcommittee SC 8, Rehabilitation of pipeline systems.
This third edition cancels and replaces the second edition (ISO 11295:2017), which has been technically
revised, to now sequentially cover all steps in process of design of pipeline rehabilitation.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
This edition includes the following significant changes with respect to the previous edition:
— Title is renewed from “Classification and information on design and applications of plastics piping
systems used for renovation and replacement” to “Plastics piping systems used for the rehabilitation of
pipelines — Classification and overview of strategic and operational activities”;
— Clause 5 is new and describes the whole process of pipeline rehabilitation with references to the
other clauses for further details;
— Clause 6 is new and deals with the strategic activities to possibly come to the decision to rehabilitate;
parts of the content of the former Clause 8 are included;
— Clause 7 is a contraction of the former Clauses 5, 6 and 7, with largely unchanged content;
— Clause 8 is new and handles further strategic activities needed to specify the rehabilitation project;
parts of the content of the former Clauses 8 and 9 are included;
— Clause 9 still covers installation aspects but is revised and content on acceptance control is
included now.
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oSIST prEN ISO 11295:2021
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Introduction
Pipeline systems are continuously required to satisfy physical, chemical, biochemical and biological
demands. These demands depend on planning, material, construction, type and period of use.
When pipeline systems become operational, they constitute a valuable asset to the network owner,
requiring adequate management. For general guidelines and requirement on asset management,
[28] [29] [30]
ISO 55000 , ISO 55001 and ISO 55002 are applicable.
For pipeline systems in particular, proper pipeline system management has to be put in place, including
monitoring the performance of the pipeline system.
For the specific case of pipelines for water supply and wastewater collection, detailed information on
[25] [26]
the overall management of the networks is provided by ISO 24516-1 and ISO 24516-3 .
In case a malfunctioning of a pipeline system is recognized, reactive measures initially focus on
improving regular maintenance procedures, including cleaning. In case of deterioration or other serious
defects, more stringent measures to rehabilitate the pipeline become necessary.
Rehabilitation is carried out when there is a need to restore or upgrade the performance of a
pipeline system. Rehabilitation can consist of repair, renovation or replacement. In recent years, the
rehabilitation of pipeline systems has become increasingly important and will continue to be so.
This document provides information on the design process when considering rehabilitation of an
existing pipeline, in order of sequence:
a) investigation and assessment of the deficiencies of current performance of the existing pipeline;
b) determination of viable options, based on performance criteria and process-related factors;
c) specification of the selected type of technique and the required pipe material;
d) the installation;
e) testing the performance.
The techniques used for the renovation and trenchless replacement of existing pipelines are classified
in technique families and the typical characteristics of each is described in general terms.
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oSIST prEN ISO 11295:2021
DRAFT INTERNATIONAL STANDARD ISO/DIS 11295:2021(E)
Plastics piping systems used for the rehabilitation of
pipelines — Classification and overview of strategic and
operational activities
1 Scope
This document sets out the steps of the overall process of pipeline rehabilitation, comprising:
— Information on strategic activities:
a) Investigation and condition assessment of the existing pipeline;
b) Pipeline rehabilitation planning;
c) Project specification.
— Information on and requirements for operational activities:
d) Application of techniques;
e) Documentation of the design and application process.
Definitions, classification and description of families of renovation and trenchless replacement
techniques are provided, including their areas of application such as underground drainage and
sewerage networks and underground water and gas supply networks.
NOTE 1 The following aspects are not covered by the scope of this document:
— new construction provided as network extension;
— calculation methods to determine, for each viable technique, the characteristics of lining or replacement pipe
material needed to secure the desired performance of the rehabilitated pipeline;
— techniques for local repair.
NOTE 2 It is the responsibility of the designer to choose and design the renovation or trenchless replacement
pipeline system.
2  Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 1043-1, Plastics — Symbols and abbreviated terms — Part 1: Basic polymers and their special
characteristics
3  Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 1043-1 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at https:// www .iso .org/ obp
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oSIST prEN ISO 11295:2021
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3.1 General
3.1.1
assessment
process, or result of this process, comparing a specified subject matter to relevant references
3.1.2
design working life
assumed period for which a structure or part of it is to be used for its intended purpose with anticipated
repair and maintenance but without renovation or replacement being necessary
3.1.3
hazard
biological, chemical, physical or radiological agent in, or condition of water, with the potential to cause
harm to public health
Note 1 to entry: Condition includes quantity.
3.1.4
pipeline system
interconnecting pipe network for the conveyance of fluids
[SOURCE: EN ISO 11298-1:2018-07, 3.1.1]
3.1.5
rehabilitation
measures for restoring or upgrading the performance of existing pipeline systems, including renovation
(3.1.6), repair (3.1.7) and replacement (3.1.8)
3.1.6
renovation
work incorporating all or part of the original fabric of the pipeline, by means of which its current
performance is improved
3.1.7
repair
rectification of local damage
3.1.8
replacement
construction of a new pipeline, on or off the line of an existing pipeline, where the function of the new
pipeline system incorporates that of the old
3.1.9
network extension
new construction off the line of a pipeline or a network with the aim to expand the total capacity of
the network
3.1.10
trenchless replacement
replacement (3.1.8) without opening trenches other than small excavations to provide access for the
particular technique
3.1.11
maintenance
routine work undertaken to ensure the continuing performance of a pipeline system(3.1.4)
3.1.12
independent pressure pipe liner
liner (3.2.3) capable on its own of resisting without failure all applicable internal loads throughout its
design life
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oSIST prEN ISO 11295:2021
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3.1.13
interactive pressure pipe liner
liner (3.2.3) which relies on the existing pipeline for radial support in order to resist without failure all
applicable internal loads throughout its design life
3.1.14
fully structural renovation
use of an independent pressure pipe liner (3.1.12) or a non-pressure pipe liner which is capable of resisting
all external loads and all externally induced post-lining deformations irrespective of the condition of
the existing pipeline
3.1.15
semi-structural renovation
use of an interactive pressure pipe liner (3.1.13) which is capable of long-term hole and gap spanning
at operational pressure or use of an independent pressure pipe liner (3.1.12) which is not capable of
resisting all external loads
3.1.16
flow diversion
temporary isolation of the section of pipeline to be rehabilitated by the use of a temporary bypass or
other means
3.2  Techniques
3.2.1
technique family
grouping of renovation (3.1.6) or trenchless replacement (3.1.10) techniques which are considered to
have common characteristics for standardization purposes
3.2.2
lining pipe
pipe inserted for renovation (3.1.6) purposes
3.2.3
liner
lining pipe (3.2.2) after installation
3.2.4
lining system
lining pipe (3.2.2) and all relevant fittings inserted into an existing pipeline for the purposes of
renovation (3.1.6)
3.2.5
lining with continuous pipes
lining with pipe made continuous prior to insertion, where the diameter of the lining pipe (3.2.2)
remains unchanged
3.2.6
lining with close-fit pipes
lining with a continuous pipe (3.2.5) for which the cross-section is reduced to facilitate installation and
reverted after installation to provide a close fit to the existing pipe
3.2.7
lining with cured-in-place pipes
lining with a flexible tube impregnated with a thermosetting resin, which produces a pipe after resin cure
3.2.8
lining with discrete pipes
lining with short lengths of pipe which are jointed to form a continuous pipe one by one during insertion
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oSIST prEN ISO 11295:2021
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3.2.9
lining with adhesive-backed hoses
lining with a reinforced hose which relies on an adhesive bond to the host pipe to provide resistance to
collapse
3.2.10
lining with spirally-wound pipes
lining with a profiled strip, spirally wound to form a continuous pipe after installation
3.2.11
lining with sprayed polymeric materials
lining with a sprayed two-part polymeric resin material that forms a continuous pipe after resin cure
3.2.12
lining with inserted hoses
lining with a reinforced hose which is either permanently shaped or re-rounded after installation by
the application of an internal pressure
3.2.13
lining with a rigidly anchored plastics inner layer
lining with a single rigid annulus of structural cementitious grout formed between a plastics layer and
the hos
...