Qualification testing of welders for under-water welding - Part 2: Diver-welders and welding operators for hyperbaric dry welding (ISO 15618-2:2001)

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.

Prüfung von Schweißern für Unterwasserschweißen - Teil 2: Unterwasserschweißer und Bediener von Schweißanlagen für Trockenschweißen unter Überdruck (ISO 15618-2:2001)

Diese Norm gilt für Schweißprozesse, bei denen das Können des Unterwasserschweißers oder das des Bedieners
von Schweißanlagen einen entscheidenden Einfluss auf die Qualität der Schweißung hat.
Diese Norm legt die wesentlichen Anforderungen, Geltungsbereiche, Prüfbedingungen, Bewertungsanforderungen
und Bescheinigungen über die Prüfung zur Anerkennung des Unterwasserschweißers sowie des Bedieners von
Schweißanlagen für Stahlschweißungen unter Wasser in einer trockenen Überdruckumgebung fest. Im Anhang A
ist der empfohlene Vordruck für die Prüfungsbescheinigung zur Anerkennung wiedergegeben.
Bei der Prüfung zur Anerkennung des Unterwasserschweißers oder des Bedieners von Schweißanlagen sollte der
Nachweis gefordert werden, dass er angemessene praktische Erfahrungen und Fachkenntnisse (Prüfung nicht
obligatorisch) hinsichtlich der Schweißprozesse, Werkstoffe und Sicherheitsanforderungen hat, für die er anerkannt
werden soll; Hinweise dafür sind im Anhang B enthalten.
Diese Norm gilt, wenn eine Prüfung des Unterwasserschweißers oder des Bedieners von Schweißanlagen vom
Kunden, durch Abnahmeorganisationen oder von sonstigen Stellen gefordert wird.
Diese Norm bezieht sich auf solche Schmelzschweißprozesse, die vom Unterwasserschweißer von Hand oder
teilmechanisch oder durch Bediener von Schweißanlagen vollmechanisch oder automatisch ausgeführt werden (sie-
he 5.2).
Alle neuen Anerkennungen werden vom Tag der Veröffentlichung dieser Norm mit ihr übereinstimmen.
Diese Norm setzt jedoch bestehende Anerkennungen von Unterwasserschweißern oder Bedienern von Schweiß-
anlagen, die nach früheren nationalen Normen oder Vorschriften abgelegt worden sind, nicht außer Kraft, vor-
ausgesetzt, die technischen Anforderungen sind erfüllt und die früheren Prüfungen entsprechen der Anwendung und
der Fertigung, in der sie eingesetzt werden.

Epreuve de qualification des soudeurs pour le soudage sous l'eau - Partie 2: Scaphandriers soudeurs et opérateurs soudeurs pour le soudage hyperbare en caisson (ISO 15618-2:2001)

La présente norme s'applique a des procédés de soudage pour lesquels l'habileté manuelle du scaphandrier soudeur ou de l'opérateur soudeur a une influence déterminante sur la qualité de l'assemblage.
La présente norme spécifie les principales exigences a respecter, les domaines de validité, les conditions d'essais, les exigences d'acceptation et de notification des résultats de l'épreuve de qualification pour la mise en ?uvre du soudage sous l'eau des aciers par des scaphandriers soudeurs et des opérateurs soudeurs dans un environnement hyperbare en caisson. Le modele recommandé pour le certificat d'épreuve de qualification est donné dans l'Annexe A.
Pendant l'épreuve de qualification, il convient de demander au scaphandrier soudeur ou a l'opérateur soudeur de faire preuve de son expérience pratique et de sa compétence technologique (épreuve non obligatoire) portant sur les procédés de soudage, les matériaux et les exigences de sécurité applicables a la qualification en cours, des informations sur ces points sont données dans l'Annexe B.
La présente norme est applicable dans le cas ou la qualification du scaphandrier soudeur ou de l'opérateur soudeur est exigée par le client, par l'organisme d'inspection ou par une autre instance.
Les procédés de soudage concernés par la présente norme sont les procédés de soudage par fusion, manuels ou semi-automatiques pour les scaphandriers soudeurs et entierement mécanisés et automatiques pour les opérateurs soudeurs (voir 5.2).
Toute nouvelle qualification est conforme a la présente norme des parution de celle-ci.

Preskušanje varilcev za podvodno varjenje - 2. del: Podvodni varilci in operaterji za suho varjenje v vodi pod povišanim tlakom (ISO 15618-2:2001)

General Information

Status
Published
Publication Date
30-Apr-2003
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-May-2003
Due Date
01-May-2003
Completion Date
01-May-2003

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SLOVENSKI STANDARD
SIST EN ISO 15618-2:2003
01-maj-2003

Preskušanje varilcev za podvodno varjenje - 2. del: Podvodni varilci in operaterji

za suho varjenje v vodi pod povišanim tlakom (ISO 15618-2:2001)

Qualification testing of welders for under-water welding - Part 2: Diver-welders and

welding operators for hyperbaric dry welding (ISO 15618-2:2001)

Prüfung von Schweißern für Unterwasserschweißen - Teil 2: Unterwasserschweißer und

Bediener von Schweißanlagen für Trockenschweißen unter Überdruck (ISO 15618-
2:2001)
Epreuve de qualification des soudeurs pour le soudage sous l'eau - Partie 2:

Scaphandriers soudeurs et opérateurs soudeurs pour le soudage hyperbare en caisson

(ISO 15618-2:2001)
Ta slovenski standard je istoveten z: EN ISO 15618-2:2001
ICS:
03.100.30 Vodenje ljudi Management of human
resources
25.160.10 Varilni postopki in varjenje Welding processes
SIST EN ISO 15618-2:2003 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN ISO 15618-2:2003
---------------------- Page: 2 ----------------------
SIST EN ISO 15618-2:2003
EUROPEAN STANDARD
EN ISO 15618-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2001
ICS 25.160.01
English version
Qualification testing of welders for under-water welding - Part 2:
Diver-welders and welding operators for hyperbaric dry welding
(ISO 15618-2:2001)

Epreuve de qualification des soudeurs pour le soudage Prüfung von Schweißern für Unterwasserschweißen - Teil

sous l'eau - Partie 2: Scaphandriers soudeurs et 2: Unterwasserschweißer und Bediener von

opérateurs soudeurs pour le soudage hyperbare en Schweißanlagen für Trockenschweißen unter Überdruck

caisson (ISO 15618-2:2001) (ISO 15618-2:2001)
This European Standard was approved by CEN on 14 August 2000.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European

Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national

standards may be obtained on application to the Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation

under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official

versions.

CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,

Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels

© 2001 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 15618-2:2001 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 15618-2:2003
EN ISO 15618-2:2001 (E)
Contents
Page

Foreword ....................................................................... 3

Introduction ..................................................................... 4

1 Scope .................................................................... 4

2 Normative references ......................................................... 4

3 Terms and definitions ........................................................ 6

4 Symbols and abbreviations .................................................... 6

4.1 General ................................................................... 6

4.2 Test piece .................................................................. 6

4.3 Consumable ................................................................ 6

4.4 Miscellaneous ............................................................... 6

5 Essential variables for approval testing ........................................... 7

5.1 General ................................................................... 7

5.2 Welding processes ........................................................... 7

5.3 Joint types (butt and fillet welds) .................................................. 7

5.4 Material groups .............................................................. 7

5.5 Consumables ............................................................... 7

5.6 Dimensions ................................................................. 8

5.7 Welding positions ............................................................ 8

5.8 Hyperbaric environment ........................................................ 8

6 Range of approval ........................................................... 8

6.1 General ................................................................... 8

6.2 Welding process ............................................................. 9

6.3 Joint types ................................................................. 9

6.4 Material groups .............................................................. 10

6.5 Consumables ............................................................... 10

6.6 Dimensions ................................................................. 10

6.7 Welding positions ............................................................ 10

6.8 Hyperbaric environment ........................................................ 11

7 Examination and testing ...................................................... 12

7.1 General .................................................................... 12

7.2 Supervision ................................................................. 12

7.3 Shapes and dimensions of test pieces ............................................. 12

7.4 Welding conditions ........................................................... 14

7.5 Test methods ............................................................... 15

7.6 Test pieces and test specimens .................................................. 15

8 Acceptance requirements for test pieces .......................................... 20

9 Re-tests ................................................................... 20

10 Period of validity ............................................................ 21

10.1 Initial approval ............................................................... 21

10.2 Prolongation ................................................................ 21

11 Certificate ................................................................. 21

12 Designation ................................................................ 22

Annex A (informative) Diver-welder or welding operator approval test certificate
for hyperbaric dry welding ....................................... 23

Annex B (informative) Job knowledge .............................................. 25

---------------------- Page: 4 ----------------------
SIST EN ISO 15618-2:2003
EN ISO 15618-2:2001 (E)
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.
---------------------- Page: 5 ----------------------
SIST EN ISO 15618-2:2003
EN ISO 15618-2:2001 (E)
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
---------------------- Page: 6 ----------------------
SIST EN ISO 15618-2:2003
EN ISO 15618-2:2001 (E)
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 6520-1:1998)
EN ISO 6947

Welds – Working positions – Definitions of angles of slope and rotation (ISO 6947:1993)

CR ISO 15608
Welding – Guidelines for a metallic material grouping system (ISO/TR 15608:2000)
ISO 857-1
Welding and allied processes – Vocabulary – Part 1: Metal welding processes
ISO 3581

Covered electrodes for manual arc welding of stainless and other similar high alloy steels – Code of symbols for

identification
---------------------- Page: 7 ----------------------
SIST EN ISO 15618-2:2003
EN ISO 15618-2:2001 (E)
3 Terms and definitions

For the purposes of this standard, the terms and definitions listed below and in EN 288-1 apply.

3.1
diver-welder
a person who performs the welding under hyperbaric conditions
3.2
hyperbaric welding operator

a person who performs fully mechanized or automatic welding in dry hyperbaric conditions (see also EN 1418)

3.3
hyperbaric dry welding

the process of welding in a dry underwater environment wherein the gaseous atmosphere acting on the welding arc

and weld is at an elevated pressure the level of which is determined by the depth of water

3.4
habitat

the sealed enclosure surrounding the work area from which the water has been displaced by a gaseous medium to

provide a dry environment for performance of the welding operation
4 Symbols and abbreviations
4.1 General

Where the full wording is not used, the following symbols and abbreviations shall be used when completing the test

certificate (see Annex A).
4.2 Test piece
a nominal throat thickness
BW butt weld
D outside diameter of pipe
FW fillet weld
Pplate
t plate or pipe wall thickness
Tpipe
z leg length of fillet weld
4.3 Consumable
nm no filler metal
wm with filler metal (solid wire)
B basic covering
S other coating types
fc flux cored
mc metal cored
4.4 Miscellaneous
bs welding from both sides
gb welding with gas backing
gg back gouging or back grinding of welds
mb welding with backing material
nb welding without backing
ng no back gouging or no back grinding
ss single-side welding
wd water depth
---------------------- Page: 8 ----------------------
SIST EN ISO 15618-2:2003
EN ISO 15618-2:2001 (E)
5 Essential variables for approval testing
5.1 General

The criteria specified in this clause shall be examined in order to identify the ability of the diver-welder or welding

operator in these areas. Each criterion is considered to be a significant factor in the approval testing.

The diver-welder or welding operator shall be tested separately. The approval test shall be carried out on test pieces

and is independent of the type of construction.

Approval of a diver welder according to this standard does not approve a welding operator and vice versa.

5.2 Welding processes

Welding processes are defined in ISO 857-1 and reference numbers of welding processes for symbolic

representation are listed in EN ISO 4063.

This standard covers the following welding processes applicable in hyperbaric dry environment.

111 manual metal arc welding (metal arc welding with covered electrode);
114 self-shielded tubular-cored arc welding;
131 metal inert gas welding, MIG welding;
135 metal active gas welding, MAG welding;
136 tubular cored metal arc welding with active gas shield;
137 tubular cored metal arc welding with inert gas shield;
141 tungsten inert gas welding, TIG welding;
15 plasma arc welding.
Other fusion welding processes by agreement.
5.3 Joint types (butt and fillet welds)

Test pieces shall be produced for butt weld (BW) and fillet weld (FW) in plates (P) or pipes ) (T) for approval tests

in accordance with 7.3.
5.4 Material groups

The designation of steel groups of material as defined in CR ISO 15608 shall apply.

This standard applies to the following material groups according to CR ISO 15608: 1, 2, 3, 7, 8 and 10.

In general, diver-welder's or welding operator s approval test shall involve depositing weld metal having a chemical

composition and mechanical strength compatible with any of the steels in the parent metal group(s).

When welding parent metals from two different groups which do not give approval to each other, an approval for the

combination as a separate group is required.

When the filler metal is dissimilar to the parent metal group, an approval for that combination of parent metal group

and filler metal is needed.
5.5 Consumables
5.5.1 General

Only consumables for the intended hyperbaric application shall be used, e. g. by the welding procedure test.

) The word "pipe", alone or in combination, is used to mean "pipe", "tube" or "hollow section".

---------------------- Page: 9 ----------------------
SIST EN ISO 15618-2:2003
EN ISO 15618-2:2001 (E)
5.5.2 Metal-arc welding with covered electrodes

Covered electrode groups are classified with respect to the most important characteristics according to EN 499 as

given in 4.3. In the case of hyperbaric dry welding only two of these classifications are applicable. These are

– B basic covering;
– S other covering.

NOTE: For further details on covered electrodes reference should be made to EN 499, EN 1600 or

ISO 3581 according to the steel in question.
5.6 Dimensions

The diver-welder or welding operator approval test shall be based on the thickness of the material (i.e. plate

thickness or wall thickness of pipe) and pipe diameters which the diver-welder or welding operator will use in

production. A range of approval is listed for each of the ranges of plate thickness and pipe wall thickness or pipe

diameter as specified in Tables 1 and 2.

It is not intended that thicknesses or diameters should be measured precisely but rather the general philosophy

behind the values given in Tables 1 and 2 should be applied.
Table 1 - Test piece (plate or pipe) and range of approval
Test piece thickness t Range of approval
t £ 6 ‡ t (max. 6 mm)
t > 6 0,5 t to 2 t (min. 6 mm)
Table 2 - Test piece diameter and range of approval
Test piece diameter D Range of approval
D £ 100 0,7 D to 2 D
100 < D £ 300 0,5 D to 2 D (min. 75 mm)
D > 300‡ 0,5 D
For structural hollow sections, "D" is the dimension of the smallest side.
See also 6.3 a).
5.7 Welding positions
The welding positions shall be taken from EN ISO 6947.

Angles of slope and rotation for straight welds in the welding positions shall be in accordance with EN ISO 6947.

5.8 Hyperbaric environment

The diver-welder or welding operator approval test shall be carried out under actual or simulated hyperbaric

conditions at the appropriate water depth.
6 Range of approval
6.1 General

As a general rule, the test piece approves the diver-welder or welding operator not only for the conditions used in

the test, but also for all joints which are considered easier to weld. The range of approval for each type of test is

given in the relevant subclauses and tables. In these tables the range of approval is indicated in the same horizontal

line.
---------------------- Page: 10 ----------------------
SIST EN ISO 15618-2:2003
EN ISO 15618-2:2001 (E)
6.2 Welding process

Each test approves one welding process. A change of welding process requires a new approval test. However, it

is possible for a diver-welder or welding operator to be approved for more than one welding process by a single test

or by several approval tests to be used to cover a multi-process joint. For example in a case where approval is

required for a single-side butt joint with the root to be welded by TIG (141) without backing and to be filled by metal-

arc welding with covered electrode (111), the diver-welder or welding operator may be approved by either of the

following routes:

a) successful completion of an approval test simulating the multi-process joint, i.e. the root run welded by TIG

(141) without backing, subsequent runs or layers welded by metal-arc welding with covered electrode (111) within

the limits of the range of approval for each welding process;

b) successful completion of separate relevant approval tests one for TIG (141) without backing for the root run

and a separate test for the fill by metal-arc welding with covered electrode (111) with backing or welded from

both sides with or without gouging.
6.3 Joint types

Depending on the test piece, the range of welds for which the diver-welder or welding operator is approved is shown

in Table 3; the following additional criteria are applicable:

a) approval for butt welds in pipes with diameter > 300 mm includes butt welds in plates;

b) approval for butt welds in plates in all relevant positions covers butt welds on pipes having an outside

diameter ‡ 600 mm;

c) welding from one side without backing approves welds from one side with backing and welds from both sides

with and without gouging;

d) welding in plates or pipes with backing approves welds made from both sides, but not for welds without

backing;
e) butt welds approve fillet welds for similar welding conditions;

f) in cases where the production work is predominantly fillet welding, it is recommended that the diver-welder or

welding operator should be approved also by an appropriate fillet welding test, i.e. on plate, pipe or branch

connection (see EN 288-3).

g) welding from both sides without gouging approves welds from one side with backing and welds from both

sides with gouging;

h) approval for butt welds in pipes without backing includes approval for branch connections within the same

range of approval as in Tables 3 and 4. For a branch weld the range of approval is based on the diameter of

the branch;

i) in cases where the production work is either branch welding or involves a complex branch connection a

special training and testing is necessary.
---------------------- Page: 11 ----------------------
SIST EN ISO 15618-2:2003
EN ISO 15618-2:2001 (E)
Table 3 - Range of approval for tests on butt joints (details of weld type)
Range of approval
Butt welds in plate Butt welds in pipe
welded from welded from welded from
one side both sides one side
Details of weld type
(ss) (bs) (ss)
with no with no with no
backing backing gouging gouging backing backing
(mb) (nb) (gg) (ng) (mb) (nb)
Butt weld welded from with (mb) x – x – –
in plate one side backing
(ss)
a a
no (nb) x x x x
backing
welded from with (gg) x – x – –
both sides gouging
(bs)
no (ng) x – x x –
gouging
Butt weld welded from with (mb) x – x – x –
in pipe one side backing
(ss)
no (nb) x x x x x x
backing
See 6.3 c) and 6.3 d).
Key

x indicates those welds for which the diver-welder or welding operator is approved

– indicates those welds for which the diver-welder or welding operator is not approved

6.4 Material groups

The range of approval for the material groups is only limited to those groups for which the consumable (see 5.5) is

applicable.
6.5 Consumables

The approval range for covered electrodes and flux cored consumables includes all similar covered electrodes and

flux cored consumables as well as gas combinations used in the diver-welder or welding operator approval test.

6.6 Dimensions

The range of approval according to plate thickness or wall thickness of pipe and/or pipe diameter is shown in Tables

1 and 2.
6.7 Welding positions

The range of approval for each welding position is given in Table 4. The welding positions and codes are given in

EN ISO 6947.
---------------------- Page: 12 ----------------------
SIST EN ISO 15618-2:2003
EN ISO 15618-2:2001 (E)
Table 4 - Range of approval according to welding positions
Range of approval
Plates Pipes
Butt welds Fillet welds
Welding position of Pipe-axis and -angle
approval test piece
Butt welds Fillet welds
fixed fixed
0° 90° 45° 0° 90°
PA PC PG PF PE PA PB PG PF PD PG PF PC H-L045 J-L045 PB PG PF PD
PA x – – – – x x – – – – – – – – x – – –
PC x x – – – x x – – – – – x – – x – – –
Butt welds PG – – x – – – – x – – – – – – – – – – –
PF x – – x – x x – x – – – – – – x – x –
PE x x – x x x x – x x – – – – – x – x x
Plates
PA – – – – – x – – – – – – – – – – – – –
PB – – – – – x x – – – – – – – – x – – –
Fillet welds PG – – – – – – – x – – – – – – – – – – –
PF – – – – – x x – x – – – – – – x – – –
PD – – – – – x x – x x – – – – – x – – x
PG – – x – – – – x – – x – – – – – x – –
PF x – – x x x x – x x – x – – – x – x x
fixed
90° PC x x – – – x x – – – – – x – – x – – –
H-L045 x x – x x x x – x x – x x x – x – x x
45°
Pipes J-L045 – – x – – – – x – – x – – – x – x – –
PB – – – – – x x – – – – – – – – x – – –
PG – – – – – – – x – – – – – – – – x – –
fixed PF – – – – – x x – x – – – – – – x – x –
90° PD – – – – – x x – – x – – – – – x – – x

PB for pipes may be welded only in the pipe: fixed; axis: vertical; weld: horizontal vertical

This is an approved position and which is covered by the other related tests.
Key

x indicates those welding positions for which the diver-welder or welding operator is approved

– indicates those welding positions for which the diver-welder or welding operator is not approved

6.8 Hyperbaric environment
6.8.1 Water depth (wd)
The range of approval for water depth is given in Table 5.
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SIST EN ISO 15618-2:2003
EN ISO 15618-2:2001 (E)
Table 5 - Range of approval according to water depth
Depth of welding Range of approval
for test piece wd
wd £ 100 m wd ± 20 m
100 m < wd £ 200 m wd ± 30 m
> 200 m wd ± 40 m
6.8.2 Gas atmosphere

For water depth £ 20 m, a change from an argon (only applied in automatic welding in a constricted area) or heliox

atmosphere to an air or nitrox atmosphere requires a new approval test. The converse shall not require a new

approval test.
For water depth > 20 m the use of air or nitrox atmosphere is not permitted.
7 Examination and testing
7.1 General
Only approved commercial diver can participate in the examinations and tests.
7.2 Supervision

The welding and testing of test pieces shall be witnessed by an examiner or examining body.

The test pieces shall be marked with the identification of the examiner and the diver-welder or welding operator

before welding starts.

The examiner or examining body may stop the test if the welding conditions are not correct or if it appears that the

diver-welder or welding operator does not have the technical competence to achieve the required standard, e.g.

where there are excessive and/or systematic repairs.
7.3 Shapes and dimensions of test pieces

The shape and dimension of test pieces (see 5.6) required are shown in Figures 1 to 4.

Dimensions in millimetres
Figure 1 - Dimensions of test piece for a butt weld in plate
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SIST EN ISO 15618-2:2003
EN ISO 15618-2:2001 (E)
Dimensions in millimetres
for t ‡ 6 mm, a £ 0,5 t
for t < 6 mm, 0,5 t £ a £ t
(z » 0,7 t)
Figure 2 - Dimensions of test piece for fillet weld(s) on plate
Dimensions in millimetres
Figure 3 - Dimensions of test piece for a butt weld in pipe
---------------------- Page: 15 ----------------------
SIST EN ISO 15618-2:2003
EN ISO 15618-2:2001 (E)
Dimensions in millimetres
t corresponds to the thinner part
for t ‡ 6 mm, a £ 0,5 t
for t < 6 mm, 0,5 t £ a £ t
(z » 0,7 t)
l = D + 150 mm min.
Figure 4 - Dimensions of test piece for a fillet weld on pipe
7.4Welding conditions

The approval test for the diver-welder or welding operator shall correspond to the conditions used in production

and follow a WPS or pWPS prepared in accordance with EN 288-2.
The following conditions shall apply:

a) the welding equipment for manual and partly mechanized welding shall be equivalent to that used in

production and the welding equipment for fully mechanized or automatic welding shall be identical to that used in

production;

b) the welding time for the test piece shall correspond to the working time under usual production conditions;

c) the test piece shall have at least one stop and one re-start in the root run and in the top capping run and be

identified in the inspection length to be examined;

d) any pre-heat or controlled heat input required in the WPS or pWPS is mandatory for the diver-welder's or

welding operator's test pi
...

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