Post on 28-Oct-2021
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SS-EN ISO 13919-1:2019SVENSK STANDARD
Svetsning – Elektronstråle- och lasersvetsade förband – Riktlinjer för kvalitetsnivåer för diskonti- nuiteter och formavvikelser – Del 1: Stål, nickel, titan och dess legeringar (ISO 13919-1:2019)
Electron and laser-beam welded joints – Requirements and recommendations on quality levels for imperfections – Part 1: Steel, nickel, titanium and their alloys (ISO 13919-1:2019)
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Fastställd: 2019-11-28ICS: 25.160.40
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Europastandarden EN ISO 13919-1:2019 gäller som svensk standard. Detta dokument innehåller den officiella engelska versionen av EN ISO 13919-1:2019.
Denna standard ersätter SS-EN ISO 13919-1, utgåva 1.
The European Standard EN ISO 13919-1:2019 has the status of a Swedish Standard. This document contains the official version of EN ISO 13919-1:2019.
This standard supersedes the SS-EN ISO 13919-1, edition 1.
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EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN ISO 13919-1 November 2019
ICS 25.160.40 Supersedes EN ISO 13919-1:1996English Version Electron and laser-beam welded joints - Requirements and recommendations on quality levels for imperfections - Part 1: Steel, nickel, titanium and their alloys (ISO 13919-1:2019) Assemblages soudés par faisceau d'électrons et par faisceau laser - Exigences et recommandations sur les niveaux de qualité des défauts - Partie 1: Acier, nickel, titane et leurs alliages (ISO 13919-1:2019)
Elektronen- und Laserstrahl-Schweißverbindungen - Leitfaden für Bewertungsgruppen für Unregelmäßigkeiten - Teil 1: Stahl, Nickel, Titan und seine Legierungen (ISO 13919-1:2019) This European Standard was approved by CEN on 21 October 2019. 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 CEN-CENELEC 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 CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION C O M I T É E U R O P É E N D E N O R M A L I S A T I O N E U R O P Ä I S C H E S K O M I T E E F Ü R N O R M U N G CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 13919-1:2019 E
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European foreword ..............................................................................................................................................................................................................ivIntroduction ..................................................................................................................................................................................................................................v1 Scope ................................................................................................................................................................................................................................. 12 Normative references ...................................................................................................................................................................................... 13 Termsanddefinitions ..................................................................................................................................................................................... 14 Symbols (and abbreviated terms) ...................................................................................................................................................... 25 Assessment of imperfections (adapted to ISO 5817 and ISO 12932) ............................................................ 2Annex A (informative) Examples of determination of percentage (%) porosity .................................................12Annex B (informative) Additional information for use of this document ...................................................................14Bibliography .............................................................................................................................................................................................................................15
iii
Contents Page
SS-EN ISO 13919-1:2019 (E)
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EN ISO 13919-1:2019 (E)
iv
European foreword
This document (EN ISO 13919-1:2019) has been prepared by Technical Committee ISO/TC 44 "Welding and allied processes" in collaboration with Technical Committee CEN/TC 121 “Welding and allied processes” the secretariat of which is held by DIN.
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 May 2020, and conflicting national standards shall be withdrawn at the latest by May 2020.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 13919-1:1996.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 13919-1:2019 has been approved by CEN as EN ISO 13919-1:2019 without any modification.
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Introduction
This document is intended to be used as a reference in drafting application codes and/or other application standards. It contains a simplified selection of laser and electron beam welding imperfections based on the designations given in ISO 6520-1.
Limits on some of the individual imperfections described in ISO 6520-1 have been prescribed directly whereas some have been grouped together. The basic numerical referencing system from ISO 6520-1 has been used.
The quality levels given in this document provide basic reference data and are not specifically related to any particular application. They refer to the types of welded joint in fabrication and not to the complete product or component itself. Therefore, it is possible that different quality levels are applied to individual welded joints in the same product or component.
It would normally be expected that, for a particular welded joint, the dimensional limits for imperfections can all be covered by specifying one quality level. In some cases, it can be necessary to specify different quality levels for different imperfections in the same welded joint.
The choice of quality level for any application is expected to take account of design considerations, subsequent processing (e.g. surfacing), mode of stressing (e.g. static, dynamic), service requirements and conditions (e.g. temperature, pressure or vacuum levels, environment) and consequences of failure. These considerations may lead to the need to include additional requirements on weld quality outside of those referred to in this document. Economic factors are also important and are intended to include not only the cost of welding, but also of inspection, test and repair.
Although this document includes types of imperfection relevant to the beam welding processes given in the scope, only those which are applicable to the process and application in question need to be considered.
Imperfections are quoted in terms of their actual dimensions, and their detection and evaluation can require the use of one or more methods of non-destructive testing. The detection and sizing of imperfections are dependent on the inspection methods and the extent of testing specified in the application standard or contract.
The values given for imperfections are for welds produced using normal welding practice. More stringent requirements as stated in quality level B can include the need for additional manufacturing processes, e.g. grinding, dressing.
v
SS-EN ISO 13919-1:2019 (E)
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Electron and laser-beam welded joints — Requirements and recommendations on quality levels for imperfections —
Part 1: Steel, nickel, titanium and their alloys
1 Scope
This document gives requirements and recommendations on levels of imperfections in electron and laser-beam welded joints in steel, nickel, titanium and their alloys. Three levels are given in such a way as to permit application for a wide range of welded fabrications. Quality level B corresponds to the highest requirement of the finished weld. The levels refer to production quality and not to the fitness-for-purpose of the product manufactured.
This document applies to electron and laser beam welding of:
— steel, nickel, titanium and their alloys;
— all types of welds welded with or without additional filler wire;
— materials equal to or above 0,5 mm thickness for electron and laser beam welding.
The purpose of this document is to define the dimensions of typical imperfections which can be expected in normal fabrication. It can be used within a quality system for the production of welded joints. It provides three sets of dimensional values from which a selection can be made for a particular application. The quality level necessary in each case is defined by the application standard or the responsible designer in conjunction with the manufacturer, user and/or other parties concerned. The quality level is expected to be prescribed prior to the start of production, preferably at the enquiry or order stage. For special purposes, additional details may need to be prescribed.
When significant deviations from the joint geometries and dimensions stated in this document are present in the welded product, it is necessary to evaluate to what extent the provisions of this document can apply.
Metallurgical aspects, e.g. grain size, hardness are not covered by this document.
This document does not address the methods used for the detection of imperfections. This document is directly applicable to visual examination of welds and does not include details of recommended methods of detection or sizing by other non-destructive means. There are difficulties in using these limits to establish appropriate criteria applicable to non-destructive testing methods, such as ultrasonic, radiographic and penetrant testing, and they can need to be supplemented by additional requirements for inspection, examination and testing.
2 Normative references
There are no normative references in this document.
3 Termsanddefinitions
No terms and definitions are listed in this document.
1
SS-EN ISO 13919-1:2019 (E)
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ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
4 Symbols (and abbreviated terms)
For the purposes of this document, the following symbols apply.
∆L distance between two imperfections (pore, cavity)
b width of weld
b1 required width of weld
d maximum size of an imperfection (pore, cavity)
f projected areas of pores or cavities
h size of the imperfection (height, width)
h1 deviation from the required weld penetration
l length of imperfection (measured in maximum size direction)
L weld length under consideration (weld length examined)
Lc length of combined porosity (affected weld length)
s weld penetration
s1 weld penetration in T-joint
t workpiece thickness
β angle of angular misalignment
5 Assessment of imperfections (adapted to ISO 5817 and ISO 12932)
Limits to imperfections are given in Table 1. These limits apply to the finished weld and may also be applied to an intermediate stage of fabrication.
A welded joint should normally be assessed separately for each individual type of imperfection.
Any two adjacent imperfections separated by a distance less than the major dimension of the smaller imperfection shall be considered a single imperfection.
For joints made of base materials having different thicknesses, the evaluation of the defects shall be based on the thickness of the thinnest base material. For stake welds made in parallel joints and lap joints, the evaluation of the defects shall be based on the sum of the thickness of the base materials for full penetration welds, and on the designed fusion penetration for partial penetration welds.
Annexes A and B include examples and additional informations for using this document.
2
SS-EN ISO 13919-1:2019 (E)
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Tabl
e 1
— Im
perf
ecti
ons
No.
ISO
652
0-1
refe
renc
eIm
perf
ecti
on
desi
gnat
ion
Rem
arks
t m
mLi
mit
s fo
r im
perf
ecti
ons
for
qual
ity
leve
lsD
CB
1 Su
rfac
e im
perf
ecti
ons
1.1
100
Crac
kAl
l typ
es o
f cra
cks e
xcep
t cra
ter c
rack
s (m
agni
ficat
ion
less
than
10×
)≥
0,5
Not
per
mit
ted
Not
per
mit
ted
Not
per
mit
ted
1.2
104
Crat
er c
rack
Mag
nific
atio
n le
ss th
an 1
0×≥
0,5
Perm
itte
dN
ot p
erm
itte
dN
ot p
erm
itte
d1.
320
17
516
Surf
ace
pore
Root
por
osit
y
Max
imum
dim
ensi
on o
f a si
ngle
por
e fo
r
Spon
gy fo
rmat
ion
at th
e ro
ot o
f a w
eld
due
to
bubb
ling
of th
e w
eld
met
al a
t the
mom
ent o
f so
lidifi
catio
n (e
.g. l
ack
of g
as b
acki
ng)
≥ 0,
5d
≤ 0,
3 s,
but m
ax.
3 m
mN
ot p
erm
itte
dN
ot p
erm
itte
d
1.4
2025
End
crat
er p
ipe
(lon
gitu
dina
l sec
tion)
≥0
,5
≤ 3
h ≤
0,4
th
≤ 0,
3 t
h ≤
0,2
t
>3
h ≤
0,3
t + 0
,3 m
mh
≤ 0,
2 t +
0,3
mm
h ≤
0,1
t + 0
,3 m
m
1.5
401
Lack
of f
usio
n (i
ncom
plet
e fu
sion
)
All t
ypes
of l
ack
of fu
sion
s (m
agni
ficat
ion
less
than
10×
)≥
0,5
l ≤ 0
,25
s or 1
mm
, w
hich
ever
is sm
alle
rN
ot p
erm
itte
dN
ot p
erm
itte
d
1.6
4021
Inco
mpl
ete
root
pe
netr
atio
n—
≥ 0,
5Sh
ort i
mpe
rfec
tions
: l ≤
0,2
5 s o
r 1 m
m,
whi
chev
er is
smal
ler
Not
per
mit
ted
Not
per
mit
ted
1.7
5011
5012
Cont
inuo
us
unde
rcut
Inte
rmit
tent
un
derc
ut
This
is n
ot re
gard
ed a
s a s
yste
mat
ic im
perf
ectio
n.
≥ 0,
5h
≤ 0,
15 t,
bu
t max
. 1 m
mh
≤ 0,
1 t,
but m
ax. 0
,5 m
mh
≤ 0,
05 t,
bu
t max
. 0,5
mm
3
SS-EN ISO 13919-1:2019 (E)
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