EN ISO 15614-8:2002

SLOVENSKI STANDARD
01-maj-2003
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Specification and qualification of welding procedures for metallic materials - Welding
procedure test - Part 8: Welding of tubes to tube-plate joints (ISO 15614-8:2002)
Anforderung und Qualifizierung von Schweißverfahren für metallische Werkstoffe -
Schweißverfahrensprüfung - Teil 8: Einschweißen von Rohren in Rohrböden (ISO 15614
-8:2002)
Descriptif et qualification d'un mode opératoire de soudage sur les matériaux métalliques
- Epreuve de qualification d'un mode opératoire de soudage - Partie 8: Soudage de
tubes sur plaques tubulaires (ISO 15614-8:2002)
Ta slovenski standard je istoveten z: EN ISO 15614-8:2002
ICS:
25.160.10
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 15614-8
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2002
ICS 25.160.10
English version
Specification and qualification of welding procedures for metallic
materials - Welding procedure test - Part 8: Welding of tubes to
tube-plate joints (ISO 15614-8:2002)
Descriptif et qualification d'un mode opératoire de soudage Anforderung und Qualifizierung von Schweißverfahren für
sur les matériaux métalliques - Epreuve de qualification metallische Werkstoffe - Schweißverfahrensprüfung - Teil
d'un mode opératoire de soudage - Partie 8: Soudage de 8: Einschweißen von Rohren in Rohrböden (ISO 15614-
tubes sur plaques tubulaires (ISO 15614-8:2002) 8:2002)
This European Standard was approved by CEN on 20 April 2001.
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, Malta, 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
© 2002 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 15614-8:2002 E
worldwide for CEN national Members.

Contents
page
Foreword.3
1 Scope .4
2 Normative references .4
3 Terms, definitions and symbols.5
3.1 Terms and definitions.5
3.2 Symbols .5
4 Preliminary Welding Procedure Specification (pWPS) .6
4.1 General.6
4.2 Items for all welding process.6
4.3 Items for particular welding processes .7
5 Qualification of welding procedure.8
6 Welding of test pieces .8
6.1 General.8
6.2 Type of test piece.8
7 Examination and testing .10
7.1 Performance .10
7.2 Acceptance levels.12
8 Range of qualification .14
8.1 General.14
8.2 Related to the manufacturer .14
8.3 Related to the material .15
8.4 Common to all welding procedures.15
9 Welding, Procedure Qualification Record form (WPQR) .16
Annex A (informative)  Welding Procedure Qualification Record form for tube to tube-plate joints
(WPQR).17
Annex ZA (informative) Clauses of this European Standard addressing essential requirements or
other provisions of EU directives.22
Bibliography .23
Foreword
This document (EN ISO 15614-8:2002) 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 October 2002, and conflicting national standards shall be withdrawn at the
latest by October 2002.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this document.
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, Malta, Netherlands, Norway, Portugal, Spain,
Sweden, Switzerland and the United Kingdom.
1 Scope
This European Standard specifies requirements for the qualification testing of welding procedures for the arc
welding of tube to tube-plate joints in metallic materials by manual, partly mechanized, mechanized or automatic
processes.
This standard is a part of a series of standards. Details of this series are given in prEN ISO 15607, Annex A.
Qualification by tube to tube-plate joint tests can be used for all joints even if they are fully loaded or only seal
welded as required in application standards.
In such cases, one or more special test pieces should be made to simulate the production joint in all essential
features, e.g. dimensions, restraint, heat sink effects. The test should be carried out prior to and under the
conditions to be used in production.
This standard applies to fusion welding of metallic materials for tube to tube-plate joints with gap. This standard
does not apply to tube-sheets with forged end connections with welded tubes (external/internal bore welds). For
welding of tube to tube-plate joints without gap welding procedure test should be defined in the specification.
For other applications and/or requirements the standard can be used if required by the specification.
Repair welding should be considered in the welding procedure test.
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 287-2, Approval testing of welders - Fusion welding - Part 2: Aluminium and aluminium alloys
EN 439, Welding consumables – Shielding gases for arc welding and cutting.
EN 571-1, Non destructive testing – Penetrant testing – Part 1 : General principles.
EN 1043-1, Destructive tests on welds in metallic materials – Hardness testing – Part 1 : Hardness test on arc
welded joints.
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 1708-1, Welding – Basic weld joint details in steels – Part 1 : Pressurized components.
EN ISO 4063, Welding and allied processes – Nomenclature of processes and reference numbers
(ISO 4063:1998).
prEN ISO 9606-1, Approval testing of welders - Fusion welding - Part 1: Steels (ISO/DIS 9606-1:2000)
EN ISO 9606-3, Approval testing of welders – Fusion welding – Part 3: Copper and copper aloys
(ISO 9606-3:1999).
EN ISO 9606-4, Approval testing of welders – Fusion welding – Part 4: Nickel and nickel alloys
(ISO 9606-4:1999).
EN ISO 9606-5, Approval testing of welders – Fusion welding – Part 5: Titanium and titanium alloys, zirconium
and zirconium alloys (ISO 9606-5:2000).
prEN ISO 15607:2000, Specification and qualification of welding procedures for metallic materials – General
rules (ISO/DIS 15607:2000).
CR ISO 15608, Welding – Guidelines for a metallic material grouping system (ISO/TR 15608:2000).
prEN ISO 15609-1:2000, Specification and qualification of welding procedures for metallic materials – Welding
procedure specification – Part 1 : Arc welding (ISO/DIS 15609-1:2000).
prEN ISO 15614-1:2000, Specification and qualification of welding procedures for metallic materials — Welding
procedure test – Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloys
(ISO/DIS 15614-1:2000).
EN ISO 6520-1, Welding and allied processes - Classification of geometric imperfections in metallic materials –
Part 1: Fusion welding (ISO 6520-1:1998).
EN 29692, Metal-arc welding with covered electrode, gas-shielded metal-arc welding and gas welding - Joint
preparations for steels (ISO 9692:1992).
3 Terms, definitions and symbols
3.1 Terms and definitions
For the purposes of this European standard, the terms and definitions given in prEN ISO 15607:2000 apply.
3.2 Symbols
For the purposes of this standard, the following symbols apply and are shown in Figure 1, 2 and 3:
a throat thickness (mm) (in this case, the minimal distance between root point and weld surface)
d pore size (mm)
p
d tube-outside diameter (mm)
a
d minimum distance between two pipes (mm), see Figure 2
l
g gap between tube and tube plate
s starting point of the root run
p
t tube-wall thickness (mm)
t cladding thickness (mm)
t tube-plate thickness (mm)
x overlap (mm)
Figure 1 — Presentation of symbols in an example
4 Preliminary Welding Procedure Specification (pWPS)
4.1 General
The qualification for tube to tube-plate welding tests shall be based on a pWPS in accordance with prEN ISO
15609-1:2000. It shall specify the relevant parameters listed in 4.2 and 4.3.
4.2 Items for all welding process
Details relating to the following items shall be recorded for all welding processes :
a) welding process, or processes when more than one is used in making a complete joint ;
b) tube-plate specification and thickness and details of any cladding and its thickness ;
c) tube specification, thickness and outside diameter ;
d) pitch type (square or triangular) and distance between pipes ;
e) joint geometry, actual borehole diameter and fit-up tolerances (sketch) in accordance with EN 29692 ;
f) cleaning and degreasing (time during the fabrication steps and type) ;
g) jigging or tacking, tacking position and expansion;
h) tube-plate and welding position ;
i) type and/or trade name of welding consumables ;
j) size (diameter) and wire lengths per run ;
k) pre-heating and interpass temperature, including method of control ;
l) welding speed (mechanized welding) ;
m) number and arrangement of runs, starting points of runs and weld dimensions (sketch) ;
n) welding sequence ;
o) post-weld heat treatment, including method of control ;
p) if necessary, the temperature and time recommended for drying/backing of welding consumables before use
;
q) any special features, including heat imput control requirements, any heat sinks effects or post-weld tube
expansion.
4.3 Items for particular welding processes
Details relating to the items given in 4.3 a) to 4.3 d) shall be recorded for these particular processes, in addition
to the items given in 4.2. The reference numbers of welding processes relate to EN ISO 4063.
a) Manual metal arc welding (111)

alternating or direct current and polarity ;

current.
b) MIG welding, MAG welding, solid wire or cored wire, with or without separate gas shield (114), (131), (135),
(136), (137)

shielding gas designation in accordance with EN 439 and flow rate ;

arc voltage ;

wire feed speed or current ;

for pulsed welding : the pulse time and frequence, pulsed current and background current.
c) TIG welding (141)

shielding gas designation in accordance with EN 439 and flow rate ;

alternating currrent (AC) or direct current (DC) and polarity ;

current in ampere ;

for pulsed welding : the pulse time and frequency, pulsed current and background current ;

whether filler metal is used.
d) Mechanized or automatic welding

all items detailed in b) or c) and the following items if necessary :

arc length or arc voltage ;

where filler metal is used its rate of addition or wire feed speed relating to the wire diameter
(see 4.2j));

other pre-programmed welding variables such as :

pre- and post-gas purge times ;

changes in current level ;

current slope up and down rates ;

welding travel speed and degree of overlap ;

when considering front face welding, the following additional information :

radius of electrode rotation ;

electrode angle relative to the tube axis ;
For all other welding processes, the welding parameters shall be specified.
5 Qualification of welding procedure
The qualification of welding procedure for the tube to tube-plate welding shall be carried out by an examiner or
examining body related to the appropriate application standard or specification.
6 Welding of test pieces
6.1 General
Procedure test pieces shall be produced in accordance with 6.2 and shall simulate the joint geometry to be used
in production or a similar geometry within the requirements of clause 4. Welders shall be qualified in accordance
with prEN ISO 9606-1, EN 287-2, EN ISO 9606-3, EN ISO 9606-4 or EN ISO 9606-5. For welding operators, the
qualification can be carried out during the tests in accordance with EN 1418.
6.2 Type of test piece
6.2.1 Joint preparation and joint construction
Examples of joint preparation according to EN 29692 and joint construction are given in EN 1708-1.
6.2.2 Tube ends welded on triangular pitch
Where tube end welds are involved on a triangular pitch, a minimum of 10 tube ends with an outside diameter
smaller than 40 mm ( 40 mm) or a minimum of 7 tube ends (area A) with an outside diameter greater than or
equal to 40 mm ( 40 mm), shall be welded as shown in Figure 2.
Key
d Minimum distance between two pipes
l
s Starting point of the root run
p
A-A/B-B Ground sections of a test specimen (examples for the location of the cut lines)
Figure 2 — Test piece for tube ends on triangular pitch
6.2.3 Tube ends welded on square pitch
Where tube end welds are involved on a square pitch, a minimum of 12 tube ends with an outside diameter
smaller than 40 mm ( 40 mm) or a minimum of nine tube ends (area A) with an outside diameter greater than or
equal to 40 mm ( 40 mm) shall be welded as shown in Figure 3.
Key
d Minimum distance between two pipes
l
s Starting point of the root run
p
A-A/B-B Ground sections of a test specimen (examples for the location of the cut lines)
Figure 3 — Test piece for tube ends on square pitch
7 Examination and testing
7.1 Performance
7.1.1 General
For a welding procedure to be qualified the same test piece representing the welding procedure test shall comply
with 7.1.2 to 7.1.6 and, when required, with the push-out tests described in 7.1.7.
7.1.2 Visual examination
After appropriate cleaning and if required any post-weld heat treatment, and prior to the cutting of test
specimens, the test piece shall be examined visually 100 %.
The welds shall show uniform contour without excessive reinforcement, with the bores of the tube free from any
spatter and shall be in accordance with Table 1.
7.1.3 Penetrant examination
The external surfaces of all welds shall be subjected to a 100 % penetrant examination in accordance with
EN 571-1.
7.1.4 Radiographic examination
All test welds, except those for push-out tests, shall be radiographed in accordance with EN 1435. An example is
given in Figure 4. In this case, the tube-plate shall be reduced in thickness of 5 mm to 12 mm.
Dimensions in millimetres
Key
1) Ray source
2) Radiated marcasite (steel/lead)
3) Film
4) Film cassette
5) Stopper
Figure 4 — Performance of the radiographic examination
7.1.5 Macroscopic examination
After visual and non-destructive examination, the test piece shall be sectioned as shown in Figures 2 and 3, by
sawing or machining and exposing two starting points of the root runs. The macroscopic examination specimens
shall be prepared and examined in accordance with EN 1321.
Macroscopic examinations of additional sections to assess compliance with the acceptance levels in 7.2 shall be
carried out where radiography reveals imperfections other than gas pores.
7.1.6 Hardness test
A hardness row normally HV 10 in accordance with EN 1043-1 shall be carried out only for the steel groups 2, 3,
4, 5, 6 and 7 in accordance with CR ISO 15608 and for dissimilar metal joints between austenitic and ferritic
steels.
The hardness shall be recorded for the weld metal, both parent metals and the heat-affected zones.
7.1.7 Push-out or pull-out test
If required by the specification, push-out or pull-out tests can be required.
7.2 Acceptance levels
7.2.1 General
It should be appreciated that the following details are being used for the qualification testing of welding
procedures and as such may be different from those specified for a particular application.
7.2.2 Visual examination
Table 1 — Visual examination
N° Imperfection/ EN ISO Remarks Limits for imperfections
designation 6520-1
reference N°
1 Cracks 100 all types of cracks not permitted
2 Crater crack 104 not permitted
3 Surface pore 2017 all types of pores, they are visible not permitted
open end on the surface
crater pipe 2024
4 Burn through of not permitted
tube wall
x  0,5 mm for tubes,
5 Overlap 506
d  25 mm outside diameter
a
and
x  1 mm for tubes,
d > 25 mm
...