2. Objectives
• Define common terms
• List components that make up a
standard welding symbol
• Identify the proper location of a
weld symbol
• Identify additional welding symbol
elements
• Identify field weld and weld-all-
around symbols
3. Objectives (cont’d.)
• Identify supplementary contour and
finish symbols
• Identify multiple weld symbol
information
• Identify bevel information
• Understand multiple reference lines
• Understand welding abbreviations
4. Welding Symbol
• Standard welding symbol consists
of:
– Reference line
– Arrow
– Tail
• Welding symbol: total symbol
including all information
• Weld symbol: symbol for a specific
type of weld
5.
6. Welding Symbol (cont’d.)
• Arrow shown with or without break
– Break made toward joint member to
be prepared or shaped
• Multiple arrows may be added
• Reference line always drawn
horizontal to bottom of print
– Lower side: arrow side
– Upper side: other side
7. Location of Weld Symbol
• When weld symbol placed on lower
side of line
– Weld made on arrow side of joint
• Weld symbol located within the
length of the reference line
• Vertical leg of fillet weld symbol
always drawn left of slanted side
• When weld symbols placed on both
sides, welds made on both sides
8. Additional Welding
Symbol Elements
• Each element applied to welding
symbol has standard location
– Specific elements denote types of
welds
– Standard supplementary symbols
may also be added
• All symbols do not have an arrow,
other, or both sides application
9. Obsolete Weld Symbols
• Symbols periodically revised
• Symbols not used on current prints
– Included for reference in older prints
10. Preferred Symbols
• Field weld, weld-all-around
symbols
– Welds extending around the joint
indicated with weld-all-around symbol
– Welds not made in the shop are field
welds
• Indicated with field weld symbol
– Flag on field weld symbol points in
either direction
– Symbols may be used together
11.
12.
13. Contour and Finish
Symbols
• Used with weld symbols to indicate
finish of face
• Finish symbols indicate method to
be used for forming contour of weld
• Letter designations: C, G, M, R, H,
P, U
• Placed on same side of reference
line as weld symbol
15. Designation of Member
to Be Beveled
• Certain welds require joint
members to be beveled
• Bevel describes edge preparation
– Feather or land
– Term applied to both bevel and
chamfer
– Arrow points with definite break
toward member to be beveled
16. Dimensions on Welding
Symbols
• Definite locations on welding
symbol for specific designation
– Determined by side of reference line
on which weld symbol placed
• Location for number of spot welds
above or below symbol
– May be no arrow or other side
17. Designation of Special
Information
• Note placed in tail of reference line
to designate other information
• Weld symbols may not be added
– CJP in tail of arrow; weld symbol
omitted
• Note added to the print that signifies this
option
• Complete joint penetration weld required
18.
19. Location of the Welding
Symbol on Orthographic
Views
• Welding symbol shown on view
that best illustrates the joint
• When symbol shown on one view,
not included on other views
20. Duplicate Welds
• Similar welds designated by:
– Additional arrows
– Indication in tail of the symbol
• Designations must refer to obvious
welds
• TYP indicates a repetition of
identical welds
– Shown in tail of welding symbol
21. Multiple Reference Lines
and their Applications
• Additional reference lines show:
– Sequence of welding operations
– Supplementary data applicable to
weld symbol on first reference line
• First reference line closest to arrow
• Weld-all-around and field weld
symbol added to reference lines
22. Welding Abbreviations
• Standard abbreviations developed
by AWS
– Abbreviations for welding processes
end in W
– Abbreviations for cutting processes
end in C
• Letters located in tail of the arrow
• Letters may be used solely for
identification
25. Summary
• Terms arrow side, other side, both
sides refer to location of weld
• Elements can be added to basic
weld symbols
• Standard elements applied to the
reference line and tail of symbol
• Multiple reference lines indicate
sequence of operations
