ISO/TS 16486-8:2022
(Main)Plastics piping systems for the supply of gaseous fuels — Unplasticized polyamide (PA-U) piping systems with fusion jointing and mechanical jointing — Part 8: Training and assessment of fusion operators
Plastics piping systems for the supply of gaseous fuels — Unplasticized polyamide (PA-U) piping systems with fusion jointing and mechanical jointing — Part 8: Training and assessment of fusion operators
This document specifies the training, assessment and approval of fusion operators, with the aim of establishing and maintaining their competency in the construction of unplasticized polyamide (PA-U) piping systems for the supply of gaseous fuels in accordance with ISO 16486‑6. It covers the butt fusion and electrofusion fusion jointing techniques and considers both the theoretical and practical knowledge necessary for making high-quality fusion joints.
Systèmes de canalisations en matières plastiques pour la distribution de combustibles gazeux — Systèmes de canalisations en polyamide non plastifié (PA-U) avec assemblages par soudage et assemblages mécaniques — Partie 8: Formation et évaluation des opérateurs de soudage
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TECHNICAL ISO/TS
SPECIFICATION 16486-8
First edition
2022-09
Plastics piping systems for the supply
of gaseous fuels — Unplasticized
polyamide (PA-U) piping systems
with fusion jointing and mechanical
jointing —
Part 8:
Training and assessment of fusion
operators
Systèmes de canalisations en matières plastiques pour la distribution
de combustibles gazeux — Systèmes de canalisations en polyamide
non plastifié (PA-U) avec assemblages par soudage et assemblages
mécaniques —
Partie 8: Formation et évaluation des opérateurs de soudage
Reference number
© ISO 2022
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Published in Switzerland
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Training organization .2
4.1 Training course . 2
4.2 Operator assessment . . 3
5 Training . 3
5.1 Training curriculum . 3
5.2 Courses . 3
5.2.1 General . 3
5.2.2 Theoretical course on general information. 4
5.2.3 Theoretical and practical courses on fusion jointing techniques . 5
6 Assessment . .7
6.1 Valid fusion operator certificate . 7
6.2 Re-assessment . . 7
7 Periodic operator certificate renewal . 8
Annex A (normative) Examination .9
Bibliography .10
iii
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 of 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
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 4, Plastics pipes and fittings for the supply of gaseous fuels.
A list of all parts in the ISO 16486 series can be found on the ISO website.
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.
iv
Introduction
The quality of a piping system for the supply of gaseous fuels is to a large extent determined by the
skills of the operators involved in installing the network. When installing unplasticized polyamide (PA-
U) pipes, the quality of the fusion joints is essential for the integrity of the piping system.
Since fusion joints in PA-U piping systems can be made using various technologies, it is important that
the fusion operators are trained and competent in the fusion technology employed in constructing PA-U
networks.
Continued competence of the fusion operator is covered by periodic re-training and re-assessment.
For the training and assessment or re-training and re-assessment of fusion operators in accordance
with this document, a valid operator certificate in accordance with ISO/TR 19480 is required.
v
TECHNICAL SPECIFICATION ISO/TS 16486-8:2022(E)
Plastics piping systems for the supply of gaseous fuels —
Unplasticized polyamide (PA-U) piping systems with fusion
jointing and mechanical jointing —
Part 8:
Training and assessment of fusion operators
1 Scope
This document specifies the training, assessment and approval of fusion operators, with the aim of
establishing and maintaining their competency in the construction of unplasticized polyamide (PA-
U) piping systems for the supply of gaseous fuels in accordance with ISO 16486-6. It covers the butt
fusion and electrofusion fusion jointing techniques and considers both the theoretical and practical
knowledge necessary for making high-quality fusion joints.
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 12176-1, Plastics pipes and fittings — Equipment for fusion jointing polyethylene systems — Part 1:
Butt fusion
ISO 12176-2, Plastics pipes and fittings — Equipment for fusion jointing polyethylene systems — Part 2:
Electrofusion
ISO 16486-1, Plastics piping systems for the supply of gaseous fuels — Unplasticized polyamide (PA-U)
piping systems with fusion jointing and mechanical jointing — Part 1: General
ISO 16486-2, Plastics piping systems for the supply of gaseous fuels — Unplasticized polyamide (PA-U)
piping systems with fusion jointing and mechanical jointing — Part 2: Pipes
ISO 16486-3, Plastics piping systems for the supply of gaseous fuels — Unplasticized polyamide (PA-U)
piping systems with fusion jointing and mechanical jointing — Part 3: Fittings
ISO 16486-4, Plastics piping systems for the supply of gaseous fuels — Unplasticized polyamide (PA-U)
piping systems with fusion jointing and mechanical jointing — Part 4: Valves
ISO 16486-5, Plastics piping systems for the supply of gaseous fuels — Unplasticized polyamide (PA-U)
piping systems with fusion jointing and mechanical jointing — Part 5: Fitness for purpose of the system
ISO 16486-6, Plastics piping systems for the supply of gaseous fuels - Unplasticized polyamide (PA-U) piping
systems with fusion jointing and mechanical jointing — Part 6: Code of practice for design, handling and
installation
ISO/TR 19480, Polyethylene pipes and fittings for the supply of gaseous fuels or water — Training and
assessment of fusion operators
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
butt fusion cycle
pressure/time relationship for a defined fusion temperature, representing the butt fusion operation
3.2
drag pressure
gauge pressure required to overcome, on a given butt fusion machine, the sliding frictional drag force of
the machine and pipe
Note 1 to entry: Drag pressure, if present, can be a positive or negative value.
3.3
frictional resistance
force necessary to overcome friction in the whole mechanism of the machine
3.4
fusion operator
person trained to carry out fusion jointing between unplasticized polyamide (PA-U) pipes and/or
fittings based on a fusion procedure (3.6)
Note 1 to entry: The fusion operator is trained for one or more fusion procedures, involving the operation of
manual and/or automatic fusion-jointing machines.
3.5
valid fusion operator certificate
approval certificate issued by the examiner/assessor stating that the knowledge and skill of the fusion
operator (3.4) is sufficient to produce fusion joints following a given fusion procedure (3.6)
3.6
fusion procedure
document agreed by the pipeline operator (3.7) providing in detail the required variables and values for
a specific fusion process, in order to ensure repeatability
EXAMPLE Butt fusion procedure, electrofusion procedure.
3.7
pipeline operator
private or public organization authorized to design, construct and/or operate and maintain the supply
system
3.8
training centre
establishment for the training of fusion operators (3.4)
4 Training organization
4.1 Training course
A valid operator certificate in accordance with ISO/TR 19480 is required prior to obtaining PA-U
training in accordance with this document.
For underground PA-U systems, a trainee fusion operator shall follow a supplemental training course at
a training centre. The training centre shall provide a supplemental training course under the conditions
described in this document.
The courses shall be delivered by a competent trainer having the required experience of fusion
processes and mastery of the fusion technique involved.
The training centre shall have a range of fusion machines and related equipment (e.g. re-rounding
clamps, scraper tools, roller supports), representative of the equipment encountered on worksites
for installing pipes, in order for the trainee fusion operator to become acquainted with the fusion
equipment commonly used. The trainee fusion operator may be trained on one of these fusion machines
or on a machine from his or her own company if accepted by the training centre. The fusion equipment
shall conform to ISO 12176-1 for butt fusion equipment and ISO 12176-2 for electrofusion equipment.
Preferably, a training centre shall not carry out activities related to contracting, supervision of
construction work or inspection of fusion j
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