ISO 2553:1984

Welds — Symbolic representation on drawings

Soudures — Représentations symboliques sur les dessins

General Information

• Status: Withdrawn
• Publication Date: 30-Nov-1984
• Withdrawal Date: 30-Nov-1984
• ICS: 01.100.20 - Mechanical engineering drawings
• ICS: 25.160.40 - Welded joints and welds
• Technical Committee: ISO/TC 44/SC 7 - Representation and terms
• Drafting Committee: ISO/TC 44/SC 7 - Representation and terms
• Current Stage: 9599 - Withdrawal of International Standard
• Completion Date: 15-Oct-1992

Relations

• Revised: ISO 2553:1992 - Welded, brazed and soldered joints — Symbolic representation on drawings
• Effective Date: 15-Apr-2008
• Revises: ISO 2553:1974 - Welds — Symbolic representation on drawings
• Effective Date: 15-Apr-2008
• Consolidated By: ISO 9394:1998 - Ophthalmic optics — Contact lenses and contact lens care products — Determination of biocompatibility by ocular study using rabbit eyes
• Effective Date: 06-Jun-2022

Standards Content (Sample)

International Standard 2553
INTERNATIONAL ORGANIZATION FOR STANDARDIZATIONOME~YHAPOL1HAR OPTAHH3AUHR no CTAHAAPTH3AUMH.ORGANlSATlON INTERNATIONALE DE NORMALISATION
L~ Welds - Symbolic representation on drawings
I
Soudures - Représent=tion/syrnbo/igue/sur les dessins
I /p i
Second edition - 1984-11-15
UDC 621.791 : 744.4 Ref. No. ISO2!553-1984(E)
Descriptors : drawings, technical drawings, welded joints, symbols, graphic symbols.
1 3
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I!? Price based on 26 pages

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Foreword
IS0 (the International Organization for standardization) is a worldwide federation of
national standards bodies (IS0 member bodies). The work of preparing International
Standards is normally carried out through IS0 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, govern-
mental and non-governmental, in liaison with ISO, also take part in the work.
Draft International Standards-adopted by the technical committees are circulated to
the member bodies for approval before their acceptance as International Standards by
the IS0 Council. They are approved in accordance with IS0 procedures requiring at
least 75 9'0 approval by the member bodies voting.
International Standard IS0 2553 was prepared by Technical Committee ISOITC 44,
Welding and allied processes.
IS0 2553 was first published in 1974. This second edition cancels and replaces the first
edition, of which it constitutes a technical revision.
0 International Organization for Standardization, 1984 O
Printed in Switzerland

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Contents Page
1 Scope and field of application . 1
2 References. . . 1
3 General. . . . 1
4 Symbols. . . 1
4.1 Elementary symbols. . 1
4.2 Combinations of elementary symbols . 3
4.3 Supplementary symbols . 3
5 Position of the symbols on drawings . 4
5.1 General . . . 4
5.2 Relation between the arrow line and the joint
5.3 Position of the arrow line .
5.4 Position of the reference line .
5.5 Position of the symbol with regard to the re
6 Dimensioning of welds . 8
General rules. . . 8
6.1
6.2 Main dimensions to be shown . . 8
7 Complementary indications .
7.1 Peripheral welds .
7.2 Field or site welds. .
7.3 Indication of the welding process . 11
Annexes
A Examples of use of symbols. . 12
B Guidance for converting drawings made according to IS0 2553-1974
IS0 2553-1984 . 27
into the new system according to
...
III

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INTERNATIONAL STANDARD IS0 2553-1984 (E)
~ ~~
Welds - Symbolic representation on drawings
3.3 This symbolic representation includes an elementary
1 Scope and field of application
symbol which may be completed by:
This International Standard prescribes the rules to be applied
- a supplementary symbol;
for the symbolic representation of welds on drawings.
-
a means of showing dimensions;
- some complementary indications (particularly for
2 References
workshop drawings).
IS0 128, Technical drawings - General principles of presenta-
3.4 In order to simplify the drawings as much as possible, it is
tion.
recommended that references be made to specific instructions
or particular specifications giving all details of the preparation
IS0 309811, Technical drawings - Lettering - Part I: Cur-
of edges to be welded and/or welding procedures, rather than
rently used characters.
showing these indications on the drawings of the welded parts.
IS0 4063, Welding, brazing, braze welding and soldering of
If there are no such instructions, the dimensions relating to the
metals - List of processes, for symbolic representation on
preparation of the edges to be welded andlor the welding pro-
drawings.
cedures can be close to the svmbol.
3 General
4 Symbols
3.1 Welds may be indicated with the general recommenda-
4.1 Elementary symbols
tions for technical drawings. However, for the purpose of
it is advisable to adopt, for usual welds, the sym- The various categories of welds are characterized by a symbol
simplification,
bolic representation described in this International Standard. which, in general, is similar to the shape of the weld to be
made.
3.2 The symbolic representation shall give clearly all necesary
The symbol shall not be taken to pre-judge the process to be
indications regarding the specific weld to be obtained without
employed.
over-burdening the drawing with notes or showing an ad-
ditional view.
The elementary symbols are shown in table 1.
1

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IS0 2553-1984 (E)
Table 1 - Elementary symbols
-
No. Designation
Illustration Symbol
m
Butt weld between plates with raised edges’]; edge flanged weld /USA/
1
(the raised edges being melted down completely)
__
2 Square butt weld
3 Single-V butt weld
V
c
4 Single-bevel butt weld
V
-
5 Single-V butt weld with broad root face
6 Single-bevel butt weld with broad root face
7 Single-U butt weld (parallel or sloping sides)
v
_.
8 Single-J butt weld
9 Backing run; back or backing weld /USA/ W
10 Fillet weld
11
1 Butt welds between plates with raised edges (symbol 1) not completely penetrated are symbolized as square butt welds (symbol 2) with the weld
thickness s shown (see table 4).
2

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IS0 2553-1984 (E)
Table 1 - Elementary symbols (concluded)
Illustration
No. Designation Symbol
n
11 Plug weld; plug or slot weld /USA/
12 Spot weld
O
c
.L
13 Seam weld
e
4.2 Combinations of elementary symbols
When required, combinations of elementary symbols can be used.
Typical examples are given in table 6.
L
4.3 Supplementary symbols
Elementary symbols may be completed by a symbol characterizing the shape of the external surface of the weld.
The recommended supplementary symbols are given in table 2.
The absence of a supplementary symbol means that the shape of the weld surface does not need to be indicated precisely.
Examples of combinations of elementary and supplementary symbols are given in tables 3 and 7.
NOTE - Though it is not forbidden to associate several symbols, it is better to represent the weld on a separate sketch, when symbolization becomes
too difficult.
Table 2 - Supplementary symbols
I Shaoe of weld surface I Svmbol I
I a) flat (usually finished flush) l- I
b) convex -
c)
c) concave
3

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IS0 2s-1984 (E)
Table 3 gives examples of application of the supplementary symbols.
Table 3 - Examples of application of supplementary symbols
Symbol
Designation I Illustration
Flat (flush) single-\/ butt weld
V
Convex double-\/ butt weld
,
Flat (flush) single-\/ butt weld with flat (flush) backing run
~
I
5 Position of the symbols on drawings
5.1 General
The symbols covered by these rules form only part of the complete method of representation (figure I), which comprises in addition
to the symbol (3) itself:
-
an arrow line (1) per joint (see figures 2 and 3);
-
a dual reference line, consisting of two parallel lines, one continuous and one dashed (2) (exception, see note 1);
-
a certain number of dimensions and conventional signs.
NOTES
(see
1 The dashed line can be drawn either above or beneath the continuous line -------
also 5.5 and annex 6).
For symmetrical welds, the dashed line is unnecessary and should be omitted.
2 The thickness of lines for arrow line, reference line, symbol and lettering shall be in accordance with the thickness of line for dimensioning accor-
ding to IS0 128 and IS0 309W1, respectively.
The purpose of the following rules is to define the location of welds by specifying :
-
the position of the arrow line;
-
the position of the reference line;
-
the position of the symbol.
I 2a
3
1 = arrow line
Joint 1
2a = reference line (continuous line)
\
2b = identification line (dashed line)
2b 3 = welding symbol
Figure 1 - Method of representation
4

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IS0 2553-1984 (E)
5.2 Relation between the arrow line and the joint
The examples given in figures 2 and 3 explain the meaning of the terms
-
"arrow side" of the joint;
-
"other side" of the joint.
"Arrow "Arrow "Othei
"Other
side
side" side" side"
/--Arrow line
...

Norme internationale @ 2553
INTERNATIONAL ORGANIZATION FOR STANDARDlZATlONoMEXI1YHAPOIIHAR OPTAHH3AUHR Il0 CTAHLIAFTH3AUHH.OAGANlSATlON INTERNATIONALE DE NORMALISATION
P Soudures - Représentations symboliques sur les dessins
Welds - Symbolic representation on drawings
I
Deuxième édition - 1984-11-15
CDU 621.791 : 744.4 Réf. no : IS0 2553-1984 (FI
Descripteurs : dessin, dessin industriel, joint soudé, symbole, symbole graphique.
N
U
O' Prix basé sur 26 pages
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IS0 2553-1984 (FI
Tableau 1 - Symboles élémentaires
Désignation Illustration Symbole
Soudures sur bords relevés 11 (bords relevés complètement fondus)
JL
Soudure sur bords droits
Soudure en V
V
Soudure en demi V *
V
Soudure en Y
Soudure en demi Y
Soudure en U (ou en tulipe)
v
Soudure en demi U (ou en J)
~~
Reprise à l’envers
Soudure d‘angle
tl
Les soudures sur bords droits relevés (symbole 1) non complètement pénétrés sont symbolisées comme la soudure sur bords droits (symbole 2)
1)
avec indication de la cote principale s (voir tableau 4).
2

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I l 5.2 '
Sommaire
1 Objet et domaine d'application .
2 Références .
3 Généralités .
4 Symboles,. . .
4.1 Symboles élémentaires . .
4.2 Combinaisons de symboles élémentaires .
4.3 Symboles supplémentaires .
5 Position des symboles sur les dessins. .
5.1 Généralités .
5.2 Relation entre la ligne de repère et le joint. .
5.3 Position de la ligne de repère .
Position de la ligne de référence. .
5.4
5.5 Position du symbole par rapport à la ligne de référence .
6 Dimensions des soudures .
.-
6.1 Règles générales .
6.2 Cotes principales à indiquer .
7 Indications complémentaires .
7.1 Soudures périphériques .
Ligr
7.2 Soudures faites sur chantier. .
7.3 Indications du procédé de soudage .
Annexes
A Exemples d'utilisation des symboles. .
6 indications pour convertir les dessins exécutés conformément
à I'ISO 2553-1974 au nouveau système de symbolisation défini dans
I'ISO2553-1984 . :
NO'
tOUi

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IS0 2553-1984 (FI
ment au bord inférieur du dessin, ou si c'est impossible, per-
5.3 Position de la ligne de repère
pendiculairement au bord inférieur du dessin.
La position de la ligne de repère par rapport à la soudure peut
être quelconque [voir figure 4 a) et b)l. Toutefois, lorsque la
soudure est de l'un des types 4, 6 et 8 (voir tableau 11, la ligne
5.5 Position du symbole par rapport à la ligne
de repère doit être dirigée vers la tôle qui est préparée [voir
de référence
figure 4 c) et d)].
Le symbole est placé au-dessus ou au-dessous de la ligne de
La ligne de repère
référence conformément aux règles suivantes :
-
rejoint une des extrémités du trait continu de la ligne de
référence avec laquelle elle forme un certain angle - Le symbole est placé du côté du trait continu de la ligne
de référence si la face extérieure de la soudure est du côté
-
doit être terminée par une flèche.
de la ligne de repère [voir figure 5 a)].
- Le symbole est placé du côté du trait interrompu si la
5.4 Position de la ligne de référence
à la ligne
face extérieure de la soudure est du côté opposé
de repère [voir figure 5 b)].
La ligne de référence doit être tracée de préférence parallèle-
Figure 4 - Position de la ligne de repère
NOTE - Dans le cas de la soudure par points faite par bossage, la surface portant le bossage est considérée comme surface extérieure de la soudure.
6

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IS0 2553-1984 (FI
6 Dimensions des soudures 6.2 Cotes principales à indiquer
La cote de positionnement de la soudure par rapport au bord de
6.1 Règles générales
la tôle ne doit pas apparaître dans la symbolisation, mais sur le
dessin.
Chaque symbole de soudure peut être accompagné d'un cer-
tain nombre de cotes.
6.2.1 L'absence d'indication après le symbole signifie que la
L'inscription se fait suivant la figure 6, comme suit: soudure est continue sur toute la longueur des éléments soudés.
1) à gauche du symbole (c'est-à-dire avant le symbole), les
6.2.2 Sauf indication contraire, les soudures bout à bout sont
cotes principales relatives à la section transversale;
à pleine pénétration.
2) à droite du symbole (c'est-à-dire après le symbole), les
cotes relatives aux dimensions longitudinales.
6.2.3 Pour les soudures d'angle, il existe deux méthodes
d'indication des cotes (voir figure 7). C'est pourquoi il faut tou-
jours placer les lettres a ou z devant la valeur de la cote corres-
pondante.
L, ,L
C6t6
Figure 6 - Exemples de principe
La méthode d'indication des dimensions principales est définie
dans le tableau 4. Les règles pour l'inscription de ces cotes y
sont exposées également.
6.2.4 Dans le cas de préparations en entailles ou en bouchon
à bords chanfreinés, c'est la cote à fond d'entaille qui doit être
...