WELDED JOINTS - SYMBOLIC REPRESENTATION ON DRAWINGS (to BS EN 22553) 1. Ele Elee! e!t" t"#$ #$ S$% S$%ol ol&& The symbols shown below are some of the symbols given in the Standard De&'!"t'o!
Ill&t#"t'o!
S$%ol
square butt weld
single-V butt weld
single-bevel butt weld
single-V butt weld with broad root face
single-bevel butt weld with broad root face
single-U butt weld
single-J butt weld
backing run (USA - back or backing weld
fillet weld
!lug weld (USA - slot or !lug weld
s!ot weld (resistance welding
edge weld
Supplementary Notes for Welding Welding Inspection
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WELDED JOINTS - SYMBOLIC REPRESENTATION ON DRAWINGS (to BS EN 22553) 2. Co%'!"t'o!& o* Elee!t"#$ S$%ol& #lementary symbols are combined for welding from both sides $ as shown below De&'!"t'o!
Ill&t#"t'o!
S$%ol
double-V butt weld (% weld
double-bevel butt weld
double-V butt weld with broad root face
double-bevel butt weld with broad root face
double-U butt weld
3. S++lee!t"#$ S$%ol& #lementary symbols may be su!!lemented by a symbol characterising the sha!e of the e&ternal surface' or sha!e of the weld Note The absence of a supplementary symbol means that the shape of the weld surface does not need to be indicated precisely.
S,"+e o* el &#*"/e o# el
S$%ol
flat (usually finished flush
conve&
concave
toes shall be blended smooth
!ermanent backing stri! used
M
removable backing stri! used
MR
Supplementary Notes for Welding Inspection
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WELDED JOINTS - SYMBOLIC REPRESENTATION ON DRAWINGS (to BS EN 22553) 0. Met,o o* Re+#e&e!t"t'o! To s!ecify a weld detail it is necessary to show a weld symbol together with*
an arrow line $ com!leted by an arrow head two reference lines consisting of*one continuous line one dashed line + (* see eception !elo"#
The arrow line ,oins one end of the continuous reference line to form an angle with it
)a
.
" arrow line )a reference line (continuous line )b identification line (dashed line . welding symbol
)b
"
,oint
5. Po&'t'o! o* /o!t'!o& l'!e "&,e l'!e The dashed line can be drawn either above' or beneath' the continuous line $ as shown
or
Supplementary Notes for Welding Inspection
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WELDED JOINTS - SYMBOLIC REPRESENTATION ON DRAWINGS (to BS EN 22553) . Rel"t'o!&,'+ %etee! t,e "##o l'!e "! t,e o'!t /igures below show the meaning of the 0arrow side1 of the ,oint and the 0other side1 of the ,oint
arrow line 0other side1
0arrow side1
0arrow side1
0other side1
arrow line
0other side1
0arrow side1
0arrow side1
arrow line
0other side1 of ,oint A
0other side1
arrow line
0arrow side1 of ,oint A
0other side1 of ,oint 3
arrow line
0arrow side1 of ,oint A arrow line
Jo'!t B
Jo'!t A
Jo'!t B
arrow line
arrow line 0other side1 of ,oint 3
Supplementary Notes for Welding Inspection
0arrow side1 of ,oint 3
0arrow side1 of ,oint 3
2
Jo'!t A
0other side1 of ,oint A
Rev. 4
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WELDED JOINTS - SYMBOLIC REPRESENTATION ON DRAWINGS (to BS EN 22553) 4. Po&'t'o! o* t,e "##o l'!e The !osition of the arrow line with res!ect to the weld is no s!ecial significance e/e+t for single bevel or single-J welds
/or such details' the arrow has to !oint to the !late that is to be !re!ared
the same detail can be shown with the dashed line !laced above the solid line
the same detail can be shown with the dashed line !laced above the solid line
6. Po&'t'o! o* t,e &$%ol 't, #e&+e/t to t,e #e*e#e!/e l'!e The symbol is !laced either above or beneath the reference line as follows*
The symbol is !laced on the continuous line side of the reference line if the weld (weld face is on the arrow side of the ,oint $ as shown below
The symbol is !laced on the dashed line side if the weld (weld face is on the other side of the ,oint $ as shown below
/or symmetrical welds' the dashed line is unnecessary - 4 should be omitted $ as shown below
Supplementary Notes for Welding Inspection
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WELDED JOINTS - SYMBOLIC REPRESENTATION ON DRAWINGS (to BS EN 22553) 7. S+e/'*$'! t,e D'e!&'o!& o* Wel& Wel /#o&&-&e/t'o! 'e!&'o!& These are written on the left-hand side of the symbol (before the symbol and certain letters are used to indicate !articular dimensions' namely* -
s
s
s de!th of !enetration
Butt welds are to have complete penetration unless the symbol shows a penetration depth
a = throat thickness (of a fillet weld a
Z = leg length (of a fillet weld Z
s
can also be used to show the de!th of !enetration required for a dee! !enetration fillet weld* -
s
a Wel le!t, 'e!&'o!& These are written on the right-hand side of the symbol (after the symbol
A .66mm long fillet weld with an 7mm leg would be shown as follows* -
Z8
Supplementary Notes for Welding Inspection
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.66
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WELDED JOINTS - SYMBOLIC REPRESENTATION ON DRAWINGS (to BS EN 22553) A! '!te#'tte!t *'llet el would be shown as follows* -
length of weld
l
l
l
(e)
(e) n
Z
distance between weld lengths number of weld elements
a
n & l & (e
(for a fillet "it$ a specified leg lengt$#
n & l & (e
(for a fillet "it$ a specified t$roat t$ic%ness#
A &t"e#e '!te#'tte!t *'llet el would be indicated as below* -
l
(e)
(e)
l
l
(e)
(e)
l
l
(e)
Z
n & l ( e )
Z
n & l ( e )
Note The dashed line is omitted to indicate that it is a symmetrical weld (fillet si:e the same on arrow side 4 other side
Ot,e# el 'e!&'o! '!'/"to#&
/ 8
8
width of slot (for a !lug or slot weld
c
width of weld (for a resistance seam weld
c
diameter of hole (!lug weld
d
n(e
diameter of s!ot (s!ot weld
d
n(e
Supplementary Notes for Welding Inspection
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n & l ( e n & l ( e
Rev. 4
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WELDED JOINTS - SYMBOLIC REPRESENTATION ON DRAWINGS (to BS EN 22553) 19. Co+lee!t"#$ '!'/"t'o!& Pe#'+,e#"l el& ;hen a weld has to be made all round a !art' the symbol is a circle $ as shown below
B7
7mm leg fillet weld all round
:'el o# &'te el& A flag is used to indicate a field or site weld $ as shown below
I!'/"t'o! o* t,e el'! +#o/e&&
111
Se;e!/e o* '!*o#"t'o! '! t,e t"'l o* t,e #e*e#e!/e l'!e /urther information can be added to the o!en tail of the reference line but it should be added in the following order (and each one se!arated by a line
welding !rocess (to 29 filler materials (to
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