ISO 15618-2:2001

INTERNATIONAL ISO
STANDARD 15618-2
First edition
2001-12-15
Qualification testing of welders for
underwater welding —
Part 2:
Diver-welders and welding operators for
hyperbaric dry welding
Épreuve de qualification des soudeurs pour le soudage sous l'eau —
Partie 2: Scaphandriers soudeurs et opérateurs soudeurs pour le soudage
hyperbare en caisson
Reference number
©
ISO 2001
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ii © ISO 2001 – All rights reserved

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 3.
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 part of ISO 15618 may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 15618-2 was prepared by the European Committee for Standardization (CEN) in collaboration with Technical
Committee ISO/TC 44, Welding and allied processes, Subcommittee SC 11, Approval requirements for welding
and allied processes personnel, in accordance with the Agreement on technical cooperation between ISO and CEN
(Vienna Agreement).
Throughout the text of this document, read ".this European Standard." to mean ".this International Standard.".
ISO 15618 consists of the following parts, under the general title Qualification testing of welders for underwater
welding:
— Part 1: Diver-welders for hyperbaric wet welding
— Part 2: Diver-welders and welding operators for hyperbaric dry welding
Annexes A and B of this part of ISO 15618 are for information only.
Contents
Page
Foreword . v

Introduction . 1
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 3
4 Symbols and abbreviations . 3
4.1 General . 3
4.2 Test pi ece . 3
4.3 Consumable . 3
4.4 Miscellaneous . 3
5 Essential variables for approval testing . 4
5.1 General . 4
5.2 Wel di ng processes . 4
5.3 Joint types (butt and fillet welds) . 4
5.4 Material groups . 4
5.5 Consumables . 4
5.6 Dimensions . 5
5.7 Wel di ng posi ti ons . 5
5.8 Hyperbari c envi ronment . 5
6 Range of approval . 5
6.1 General . 5
6.2 Wel di ng process . 6
6.3 Joi nt types . 6
6.4 Material groups . 7
6.5 Consumables . 7
6.6 Dimensions . 7
6.7 Wel di ng posi ti ons . . . 7
6.8 Hyperbari c envi ronment . . 8
7 Examination and testing . 9
7.1 General . 9
7.2 Supervision . 9
7.3 Shapes and dimensions of test pieces . 9
7.4 Welding conditions . 11
7.5 Test methods . 11
7.6 Test pieces and test specimens . 12
8 Acceptance requirements for test pieces . 16
9 Re-tests . 16
10 Period of validity . 17
10.1 Initial approval . 17
10.2 Prolongation . 17
11 Certificate . 17
12 Designation . 18
Annex A (informative) Diver-welder or welding operator approval test certificate
for hyperbari c dry wel di ng . 19
Annex B (informative) Job knowledge . 21
iv © ISO 2001 – All rights reserved

Foreword
The text of EN ISO 15618-2:2001 has been prepared by Technical Committee CEN/TC 121 "Welding", the
secretariat of which is held by DS, in collaboration with Technical Committee ISO/TC 44 "Welding and allied
processes".
This European Standard shall be given the status of a national standard, either by publication of an identical text or
by endorsement, at the latest by June 2002, and conflicting national standards shall be withdrawn at the latest by
June 2002.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,
France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden,
Switzerland and the United Kingdom.
Introduction
This standard covers the principles to be observed in the approval testing of diver-welder or welding operator
performance for the fusion welding of steels in a hyperbaric, dry environment.

The ability of the diver-welder or welding operator to follow verbal or written instructions and testing of his skill are
therefore important factors in ensuring the quality of the welded product.
Testing of skill to this standard depends on welding methods in which uniform rules and test conditions are complied
with, and standard test pieces are used.
This standard is intended to provide the basis for the mutual recognition by examining bodies for approval relating
to diver-welder s or welding operator s competence in the various fields of application. Tests should be carried
out in accordance with this standard unless more severe tests are specified by the relevant application standard
when these should be applied.
The test weld may be used to approve a welding procedure and a diver-welder or welding operator, provided that
all the relevant requirements, e.g. test piece dimensions, are satisfied.
The diver-welder s or welding operator s skill and job knowledge continue to be approved only if the diver-welder
or welding operator are working with reasonable continuity on welding work within the extent of approval.
1 Scope
This standard applies to welding processes where the skill of the diver-welder or welding operator has a significant
influence on weld quality.
This standard specifies essential requirements, ranges of approval, test conditions, acceptance requirements and
certification for the approval testing of diver-welder or welding operator performance for the welding of steels
underwater in a hyperbaric dry environment. The recommended format for the certificate of approval testing is given
in Annex A.
During the approval test the diver-welder or welding operator should be required to show adequate practical
experience and job knowledge (test non mandatory) of the welding processes, materials and safety requirements for
which he is to be approved, information on these aspects is given in Annex B.
This standard is applicable when the diver-welder s or welding operator s approval testing is required by the
purchaser, by inspection authorities or by other organisations.
The welding processes referred to in this standard include fusion welding processes which are designated as manual
or partly mechanized welding for diver-welders and fully mechanized or automatic welding for operators (see 5.2).
All new approvals are in accordance with this standard from the date of this issue.
However, this standard does not invalidate previous diver-welder or welding operator approvals made to former
national standards or specifications, providing the intent of the technical requirements is satisfied and the previous
approvals are relevant to the application and production work on which they are to be employed.
Also, where additional tests should be carried out to make the approval technically equivalent it is only necessary
to do the additional tests on a test piece which should be made in accordance with this standard. Consideration of
previous approvals to former national standards or specifications should be at the time of the enquiry/contract stage
and agreed between the contracting parties.
The certificate of approval testing is issued under the sole responsibility of the examiner or examining body.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text and the publications are listed hereafter. For
dated references, subsequent amendments to or revisions of any of these publications apply to this European
Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the
publication referred to applies (including amendments).
EN 288-1
Specification and approval of welding procedures for metallic materials – Part 1: General rules for fusion welding
EN 288-2
Specification and approval of welding procedures for metallic materials – Part 2: Welding procedure specification
for arc welding
EN 499
Welding consumables – Covered electrodes for manual metal arc welding of non alloy and fine grain steels –
Classification
EN 571-1
Non-destructive testing – Penetrant testing – Part 1: General principles
EN 910
Destructive tests on welds in metallic materials – Bend tests
EN 970
Non-destructive examination of fusion welds – Visual examination
EN 1290,
Non-destructive examination of welds – Magnetic particle examination of welds
EN 1320
Destructive tests on welds in metallic materials – Fracture test
EN 1321
Destructive tests on welds in metallic materials – Macroscopic and microscopic examination of welds
EN 1418
Welding personnel – Approval testing of welding operators for fusion welding and resistance weld setters for fully
mechanized and automatic welding of metallic materials
EN 1435
Non-destructive examination of welds – Radiographic examination of welded joints
EN 1600
Welding consumables – Covered electrodes for manual metal arc welding of stainless and heat resisting steels –
Classification
EN 1714
Non destructive examination of welds – Ultrasonic examination of welded joints
EN ISO 4063
Welding and allied processes – Nomenclature of processes and reference numbers (ISO 4063:1998)
prEN ISO 5817
Welding – Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding excluded) – Quality levels
for imperfections (ISO/DIS 5817:2000)
EN ISO 6520-1
Welding and allied processes – Classification of geometric imperfections in metallic materials – Part 1: Fusion
welding (ISO 6520-1:1
...