The document discusses welding symbols according to ISO 2553, including elementary weld symbols for different types of welds like square groove, single V groove, bevel groove, fillet, plug, and seam welds. It also covers supplementary symbols for weld profiles and backing strips. Examples are given for applying welding symbols including dimensioning of butt, fillet, intermittent, spot, seam, plug, and slot welds.

1. Welding Symbols
(ISO 2553)

2. ELEMENTARY WELD SYMBOLS
Square Groove Weld
Single V Groove Weld

3. ELEMENTARY WELD SYMBOLS
Single Bevel Groove Weld
Single V Groove Weld with Broad Root Face

4. ELEMENTARY WELD SYMBOLS
Single Bevel Groove Weld with Broad Root Face
Single U Groove Weld

5. ELEMENTARY WELD SYMBOLS
Single J Groove Weld
Backing Weld

6. ELEMENTARY WELD SYMBOLS
Fillet Weld
Plug / Slot Weld

7. ELEMENTARY WELD SYMBOLS
Spot Weld
Seam Weld

8. ELEMENTARY WELD SYMBOLS
Edge Weld
Surfacing

9. SUPPLEMENTARY SYMBOLS
Flat
Convex Concave
Weld Profile

10. SUPPLEMENTARY SYMBOLS
Toes blended
smoothly
Permanent
Backing Strip
M
Removable
Backing Strip
MR

11. SUPPLEMENTARY SYMBOLS
Peripheral Welds

12. SUPPLEMENTARY SYMBOLS
Site welds

13. SUPPLEMENTARY SYMBOLS
Tail Optional)
Sequence of Information in the Tail
• Process (as per ISO 4063)
• Acceptance Level (as per ISO 5817 or ISO 10042)
• Working Position (as per ISO 6947)
• Filler Materials (as per ISO 544 or ISO 2560 or
ISO 3581)

14. EXAMPLES OF APPLICATION
Method of representation
Weld Joint
Arrow
Line
Reference Line (Continuous)
Reference Line (Dashed)

15. EXAMPLES OF APPLICATION
Welding on the Arrow Side
Arrow Side
Other Side

16. EXAMPLES OF APPLICATION
Welding on the Other Side
Arrow Side
Other Side

17. EXAMPLES OF APPLICATION
Welding on the Other Side
Other
Side
Arrow
Side

18. EXAMPLES OF APPLICATION
Welding on the Arrow Side
Other
Side
Arrow
Side

19. EXAMPLES OF APPLICATION
Which is the Other Side in this case?
Side A
Side C
Side B
Side D

20. EXAMPLES OF APPLICATION
Welding on both Sides
Other Side
Arrow Side

21. EXAMPLES OF APPLICATION
Symmetric Welding on both Sides

22. EXAMPLES OF APPLICATION
Pointing of Arrows for Bevel and J Joints
OR

23. EXAMPLES OF APPLICATION
Pointing of Arrows for Bevel and J Joints

24. DIMENSIONING OF WELDS
Butt Joints
l
s l s

25. DIMENSIONING OF WELDS
Fillet Welds
z5 l
5
5
a5 l
5

26. DIMENSIONING OF WELDS
Fillet Welds
a a a

27. DIMENSIONING OF WELDS
Intermittent Fillet Welds
l (e) l (e)
z n x l (e)
z n x l (e)

28. DIMENSIONING OF WELDS
Staggered Intermittent Fillet Welds
z n x l (e)
z n x l (e)
l (e) l (e)
l (e) l (e)

29. DIMENSIONING OF WELDS
Spot Weld
d n (e)
d
e e

30. DIMENSIONING OF WELDS
Seam Weld
d n x l (e)
d
l e

31. DIMENSIONING OF WELDS
Plug Weld
d n (e)
d
e e

32. DIMENSIONING OF WELDS
Slot Weld
d n x l (e)
d
l e