Civil Engineering Reference
In-Depth Information
Partial penetration welds
In both the ISO and AWS systems the size of a butt/groove weld can
be specified by a number which is placed to the left of the weld
symbol. In the AWS weld symbol, the number is placed in brackets,
as in
Fig. 9.3
.
Illustration
ISO
AWS
6
( )
1
4
1
4
6
9.3
Partial penetration single-V butt/groove weld. ISO dimensions are in
millimetres; AWS dimensions are in inches.
The application of this system to a partial penetration square
butt/groove weld is shown in
Fig. 9.4
. In the AWS system, in which
edge preparations can be indicated, the size of the gap between the
plates is specified by a number between the sides of the weld
symbol. The dimensions of the gap need only be included on one
side of the reference line.
Illustration
ISO
AWS
( )
1
4
10
6
( )
3
8
8
3
8
10
1
4
6
1
8
9.4
Partial penetration square butt/groove weld. ISO dimensions are in mil-
limetres; AWS dimensions are in inches.
Groove dimensions
In the AWS system full details of the groove dimensions can be speci-
fied, for example, bevel angles, root face, root gap, as well as the sizes
of the welds on each side of the joint.
Figure 9.5
shows a 5/8 in thick
plate, prepared with 60° included angles, bevel depths of 1/4 in and
weld sizes of 3/8 in, giving overlap at the centre of 1/8 in.
Illustration
AWS
( )
4
8
( )
1
4
3
8
60°
1
4
5
8
1
4
60°
9.5
Depth of bevels and weld sizes (AWS) (dimensions are in inches).
