ISO/FDIS 11295

Plastics piping systems used for the rehabilitation of pipelines — Classification and overview of strategic, tactical and operational activities

This document specifies the steps of the overall process of pipeline rehabilitation, comprising: — information on strategic and tactical activities: a) investigation and condition assessment of the existing pipeline; b) pipeline rehabilitation planning. — information on and requirements for operational activities: c) project specification; d) applications of techniques; e) documentation of the design and application process. Definitions and classification of families of renovation and trenchless replacement techniques are provided, and their respective features described. Areas of application covered include underground drainage and sewerage networks and underground water and gas supply networks. The following aspects are not covered by the scope of this document: — new construction provided as network extensions; — 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 providing non-structural pressure pipe liners; — techniques for local repair. It is the responsibility of the designer to choose and design the renovation or trenchless replacement pipeline system.

Systèmes de canalisation en plastique destinés à la réhabilitation des réseaux enterrés — Classification et vue d’ensemble des activités stratégiques, tactiques et opérationnelles

Le présent document spécifie les étapes du processus global de réhabilitation des canalisations, comprenant: — des informations sur les activités stratégiques et tactiques: a) inspection et évaluation de l'état de la canalisation existante; b) planification de la réhabilitation de la canalisation. — informations sur les activités opérationnelles et leurs exigences: c) spécification du projet; d) application des techniques; e) documentation du processus de conception et d'application. Les définitions et la classification des familles de techniques de rénovation et de remplacement sans tranchée sont fournies, et leurs caractéristiques respectives décrites. Les domaines d'application couverts comprennent les réseaux les branchements et les collecteurs d'assainissement enterrés et les réseaux enterrés d'approvisionnement en eau et en gaz. Les aspects suivants ne sont pas couverts par le domaine d'application du présent document: — nouvelle construction prévue comme extension du réseau; — méthodes de calcul permettant de déterminer, pour chaque technique viable, les caractéristiques du matériau du tubage ou de remplacement des canalisations nécessaires pour garantir la performance souhaitée de la canalisation réhabilitée; — techniques permettant de fournir des revêtements non structuraux pour les tubes sous pression; — techniques de réparation locale. Il est de la responsabilité du concepteur de choisir et de concevoir le système de canalisation de rénovation ou de remplacement sans tranchée.

General Information

• Status: Not Published
• ICS: 23.040.20 - Plastics pipes
• Technical Committee: ISO/TC 138/SC 8 - Rehabilitation of pipeline systems
• Drafting Committee: ISO/TC 138/SC 8 - Rehabilitation of pipeline systems
• Current Stage: 5020 - FDIS ballot initiated: 2 months. Proof sent to secretariat
• Start Date: 05-Nov-2025
• Completion Date: 05-Nov-2025

Relations

• Revises: ISO 11295:2022 - Plastics piping systems used for the rehabilitation of pipelines — Classification and overview of strategic, tactical and operational activities
• Effective Date: 29-Oct-2022

Standards Content (Sample)

FINAL DRAFT
International
Standard
ISO/TC 138/SC 8
Plastics piping systems used for
Secretariat: JISC
the rehabilitation of pipelines —
Voting begins on:
Classification and overview of
2025-11-05
strategic, tactical and operational
Voting terminates on:
activities
2025-12-31
Systèmes de canalisation en plastique destinés à la réhabilitation
des réseaux enterrés — Classification et vue d’ensemble des
activités stratégiques, tactiques et opérationnelles
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 SUPPOR TING DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/CEN PARALLEL PROCESSING LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
FINAL DRAFT
International
Standard
ISO/TC 138/SC 8
Plastics piping systems used for
Secretariat: JISC
the rehabilitation of pipelines —
Voting begins on:
Classification and overview of
strategic, tactical and operational
Voting terminates on:
activities
Systèmes de canalisation en plastique destinés à la réhabilitation
des réseaux enterrés — Classification et vue d’ensemble des
activités stratégiques, tactiques et opérationnelles
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 SUPPOR TING DOCUMENTATION.
© ISO 2025
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/CEN PARALLEL PROCESSING
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland Reference number
ii
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
3.1 General terms .2
3.2 Terms related to techniques .4
3.3 Terms related to services conditions .6
4 Abbreviated terms . 6
5 Pipeline rehabilitation process . 7
6 Investigation and condition assessment of the existing pipeline . 8
6.1 Performance criteria .8
6.1.1 General .8
6.1.2 Hydraulic requirements .9
6.1.3 Structural requirements .9
6.1.4 Environmental requirements .9
6.1.5 Operational requirements .10
6.2 Investigation of performance .10
6.2.1 General .10
6.2.2 Hydraulic investigation .11
6.2.3 Structural investigation . .11
6.2.4 Environmental investigation . . 12
6.2.5 Operational investigation . 12
6.3 Condition assessment . 12
6.4 Risk analysis . 13
6.5 Control measures . 13
7 Classification and characteristics of rehabilitation techniques . 14
7.1 Overview .14
7.2 Classification of renovation techniques . 15
7.2.1 General . 15
7.2.2 Lining with continuous pipes . .16
7.2.3 Lining with close-fit pipes .18
7.2.4 Lining with cured-in-place pipes .21
7.2.5 Lining with discrete pipes . 25
7.2.6 Lining with adhesive-backed hoses. 29
7.2.7 Lining with spirally-wound pipes . 30
7.2.8 Lining with pipe segments . 33
7.2.9 Lining with a rigidly anchored plastics inner layer . 34
7.2.10 Lining with sprayed polymeric materials . . 36
7.2.11 Lining with inserted hoses . 38
7.3 Classification of trenchless replacement techniques . 40
7.3.1 General . 40
7.3.2 Pipe bursting. 40
7.3.3 Pipe removal .43
7.3.4 Horizontal directional drilling (HDD) . 46
7.3.5 Impact moling . 49
7.3.6 Pipe jacking .51
8 Selection of rehabilitation techniques .54
8.1 General . 54
8.2 Pipeline system layout . 54
8.3 Hydraulic performance . 55
8.4 Structural performance . 56

iii
8.4.1 General . 56
8.4.2 Non-pressure pipes . 56
8.4.3 Pressure pipes .57
8.5 Environmental impact . 60
8.6 Construction constraints .61
8.7 Project specification .61
9 Implementation of rehabilitation techniques .62
9.1 Preconstruction activities . .62
9.2 Assessment of conformity of products . 63
...

ISO/TC 138/SC 8
Secretariat: JISC
ISO/TC 138/SC 8/WG 1
Secretariat: BSI
Date: 2025-08-0310-21
Plastics piping systems used for the rehabilitation of pipelines —
Classification and overview of strategic, tactical and operational
activities
Systèmes de canalisation en plastique destinés à la réhabilitation des réseaux enterrés — Classification et vue
d’ensemble des activités stratégiques, tactiques et opérationnelles

FDIS stage
This document is not an ISO International Standard. It is distributed for review and comment. It is subject to change
without notice and may not be referred to as an International Standard.
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/DIS FDIS 11295:20242025(en)
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 on the internet or an intranet, without prior written permission. Permission can be requested from either ISO
at the address below or ISO'sISO’s member body in the country of the requester.
ISO Copyright Office copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
Email: [e-mail]
E-mail: [e-mail]
Website: www.iso.orgwww.iso.org
Published in Switzerland.
ii © ISO 2024 – All rights reserved
ii
Contents
Foreword . v
Introduction . vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Abbreviated terms . 7
5 Pipeline rehabilitation process . 8
6 Investigation and condition assessment of the existing pipeline . 9
7 Classification and characteristics of rehabilitation techniques. 16
8 Selection of rehabilitation techniques . 72
9 Implementation of rehabilitation techniques . 81
Bibliography . 87

3.1 General terms . 2
3.2 Terms related to techniques . 4
3.3 Terms related to services conditions . 7
6.1 Performance criteria . 8
6.1.1 General . 8
6.1.2 Hydraulic requirements . 10
6.1.3 Structural requirements . 10
6.1.4 Environmental requirements . 10
6.1.5 Operational requirements . 11
6.2 Investigation of performance . 11
6.2.1 General . 11
6.2.2 Hydraulic investigation . 12
6.2.3 Structural investigation . 13
6.2.4 Environmental investigation . 14
6.2.5 Operational investigation . 14
6.3 Condition assessment . 14
6.4 Risk analysis . 15
6.5 Control measures . 15
7.1 Overview . 15
7.2 Classification of renovation techniques . 17
7.2.1 General . 17
7.2.2 Lining with continuous pipes . 17
7.2.3 Lining with close-fit pipes . 20
7.2.4 Lining with cured-in-place pipes . 23
7.2.5 Lining with discrete pipes . 27
7.2.6 Lining with adhesive-backed hoses . 30
7.2.7 Lining with spirally-wound pipes . 32
7.2.8 Lining with pipe segments . 35
7.2.9 Lining with a rigidly anchored plastics inner layer . 37
7.2.10 Lining with sprayed polymeric materials . 39
7.2.11 Lining with inserted hoses . 40
7.3 Classification of trenchless replacement techniques . 42
iii
ISO/DIS FDIS 11295:20242025(en)
7.3.1 General . 42
7.3.2 Pipe bursting . 42
7.3.3 Pipe removal . 45
7.3.4 Horizontal directional drilling (HDD) . 48
7.3.5 Impact moling . 51
7.3.6 Pipe jacking . 53
8.1 General . 56
8.2 Pipeline system layout . 57
8.3 Hydraulic performance . 57
8.4 Structural performance . 58
8.4.1 General . 58
8.4.2 Non-pressure pipes . 58
8.4.3 Pressure pipes . 60
8.5 Environmental impact . 63
8.6 Construction constraints . 63
8.7 Project specification. 64
9.1 Preconstruction activities . 65
9.2 Assessment of conformity of products . 66
9.3 Inspection, storage and handling of the materials on site . 66
9.4 Application of rehabilitation technique . 67
9.4.1 Preparatory work . 67
9.4.2 Construction . 67
9.5 Acceptance control . 67
9.5.1 General . 67
9.5.2 Leak tightness testing . 68
9.5.3 Sampling . 69
9.6 Completion of the work . 69
9.6.1 Finishing off the rehabilitation work . 69
9.6.2 Lateral reinstatement . 69
9.7 Documentation of the process . 70
iv © ISO 2024 – All rights reserved
iv
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 th
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