1. Welding Drawings

2. WELDING DRAWINGS
WELD TERMINOLOGY

3. Weld terminology Leg Face Throat Groove radius
Root opening (groove weld) is the space between the pieces before welding*
Root face
Groove angle

4. WELDING DRAWINGS
WELD TERMINOLOGY

5. WELDING DRAWINGS
WELD TERMINOLOGY

6. WELDING DRAWINGS
WELD TERMINOLOGY

7. WELDING DRAWINGS
SINGLE
DOUBLE
FILLET
FILLET AND GROOVE WELDS

8. WELDING DRAWINGS WELDING DRAWINGS
SINGLE
DOUBLE
SQUARE
FILLET AND GROOVE WELDS

9. WELDING DRAWINGS
SINGLE
DOUBLE
BEVEL
GROOVE
FILLET AND GROOVE WELDS

10. WELDING DRAWINGS
SINGLE
DOUBLE
V-GROOVE
FILLET AND GROOVE WELDS

11. WELDING DRAWINGS
SINGLE
DOUBLE
J-GROOVE
FILLET AND GROOVE WELDS

12. WELDING DRAWINGS
SINGLE
DOUBLE
U-GROOVE
FILLET AND GROOVE WELDS

13. WELDING DRAWINGS SINGLE DOUBLE FLARE- BEVEL GROOVE
FILLET AND GROOVE WELDS

14. WELDING DRAWINGS
SINGLE
DOUBLE
FLARE-V
GROOVE
FILLET AND GROOVE WELDS

15. Location of weld symbol wrt joint*
Welds on the arrow side of the joint are shown by placing the weld symbol below the reference line
Welds on the other side of the joint are shown by placing the weld symbol above the reference line
Welds on both sides of the joint are shown by placing the weld symbol on both sides of the reference line

16. WELDING DRAWINGS
WELD TERMINOLOGY

17. Field welds & All around welds
Weld extending completely around a joint is indicated by a weld-all-around symbol placed at the intersection of the reference line and the arrow
Not required for welds extending around the circumference of a pipe
Not made in the shop or at the place of initial construction
Small black flag symbol* is placed above and at right angles to the reference line

18. Last slide on weld symbols
Multiple reference lines indicate a sequence of operations to be done at a single location*
Tail of welding symbol*
Welding process
Omitted when no references are required

19. WELDING DRAWINGS
COMBINED WELDING SYMBOLS

20. Design of welded joints
The size of the weld should always be designed with reference to the size of the thinner member
Fillets welds are cheaper and easier to apply than groove
Full-strength fillet welds joining 2 different thicknesses of material should be sized using a table of recommended full strength weld sizes based on the thinner plate*

21. WELDING DRAWINGS
FINISHING OF WELDS

22. 18-3 Fillet Welds & weld symbol (WS)
Dimensions of fillet welds are shown on the same side of the reference line as the WS & to the left
Specify dimensions of fillet welds on both sides of a joint
Vertical part of fillet weld symbol always on left*
If using a general note giving fillet weld dimensions, dimensions may be left off WS
If dimensions differ from general note show them on WS
Length of weld shown to right of WS

23. More on fillet welds…
Staggered intermittent fillet welds are designated in the weld symbol by staggering where the weld symbol appears on the reference line (p.724*)

24. Size of fillet welds
A practical method to size fillet welds is to design the weld for the thinner plate, making it sufficient to carry 1/3 to ½ the carrying capacity of the plate.

25. COMPARISON OF A CAST SHAFT SUPPORT WITH A WELDED STEEL SHAFT SUPPORT
WELDING DRAWINGS
COMPARISON OF A CAST SHAFT SUPPORT WITH A WELDED STEEL SHAFT SUPPORT

26. 18-4 Groove Weld symbol
Dimensions of groove weld are shown on the same side of the reference line as the welding symbol
When both sides of a double-groove weld have the same (or different) dimension, both sides are dimensioned, however the root opening needs to appear only once
When a general note governs dimensions of groove welds, groove welds need not be dimensioned on the weld symbol

27. Back and Backing welds
Back or backing weld symbols are used to indicate bead-type back or backing welds of singe-groove welds
The back weld is made after the groove weld
The backing weld is made before the groove weld

28. WELDING DRAWINGS
APPLICATION OF BACK AND BACKING WELD SYMBOLS

29. 18-5 Other basic welds
Plug
Slot
Spot
Seam
Surface
Flanged
Stud

30. OTHER BASIC WELDING SYMBOLS AND THEIR LOCATION SIGNIFICANCE
WELDING DRAWINGS
OTHER BASIC WELDING SYMBOLS AND THEIR LOCATION SIGNIFICANCE