Machine Drawing

Welded Joints 169

dharm
d:\N-Design\Des11-1.pm5

M

G

1.5 to 3

Upto 6

60°

0to3

1.5 to 5

3to6

T<10

T>10

T

>12

0to^3

60°

3to6

0to^3 T

45° to 50°

T<10

T>10

3to5

5to8

5to8

>12

0to1.5

45° to 50

>1210 to 5

0to3

1.5 to 5

10 to 20°

0to3

10 to 20°

>25

10 to 5

1.5 to 3

10 to 20°

r=10to5

>12

r

0to3

1.5to 3

r=10to5 >25

10 to 20°

1.5to 3

0to3

Fig. 11.11 Edge preparation

11.5 Surface Finish

Finishing of welds other than cleaning, shall be indicated

by suitable contour and finish symbols, viz., chipping C,

machining M and grinding G. Where a weld is required to

have approximately flush surface without any other

method of finishing, a straight line should be added below

the symbol to indicate it (Fig. 11.12).

11.6 Rules to be Observed while Applying Symbols

1. Symbols for fillet and similar welds should be shown, such that the vertical portion of

the symbols are indicated on the left hand side of the symbol, irrespective of the

orientation of the weld metal.

2. If the welds are to be made on the arrow side of a joint, the corresponding symbol should

be placed either above or below the cotinuous reference line (Fig. 11.8).

3. If the welds are to be made on the other side of a joint, the corresponding symbol should

be placed above or below the dashed reference line (Fig. 11.8).

4. If the welds are to the made on both sides of a joint, the corresponding symbols should

be placed on both sides of the reference line and the dashed line is not shown (Fig. 11.8).

Fig. 11.12