Post on 20-Nov-2014
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Welding Symbols
Understanding Welding SymbolsTerms and DefinitionsTerms and Definitions
Created By Jeffrey Rodenbarger Drake-Williams Steel
Omaha NebraskaOmaha, Nebraska
•Reference Line
Reference Line (Required element)
Always Horizontal
Arrow Line
Reference Line (Required element)
Arrow
Tail
Reference Line (Required element)
Arrow
Tail
Reference Line must always be horizontal,
Arrow points to the line or lines on drawing which clearly identify the proposed joint orArrow points to the line or lines on drawing which clearly identify the proposed joint or weld area.
Reference Line (Required element)
Arrow
Tail
The tail of the welding symbol is used to indicate the welding or cutting processes, as well as the welding specification, procedures, or the supplementary information to be used in making the weld.
Reference Line must always be horizontal,
Arrow points to the line or lines on drawing which clearly identify the proposed joint orArrow points to the line or lines on drawing which clearly identify the proposed joint or weld area.
Basic components of a WELDING SYMBOL
Reference Line (Required element)
p f
Arrow connects reference line to arrow side member of joint or arrow side of joint
Arrow
TailTail omitted when reference not used
The tail of the welding symbol is used to indicate the welding or cutting processes, as well as the welding specification, procedures, or the supplementary information to be used in making the weld.
All the way AroundA circle at the tangent of the arrow and the reference line
All the way Around
means welding to be all around.
Field Weld Symbol
A flag at the tangent of the reference line and arrow means Field Weld.
Weld Symbol Terminology
OTHER SIDE
ARROW SIDEARROW SIDE
Break in arrow means arrow side must be side that beveling or other preparation requiredother preparation required.
Fillet Weld (Arrow Side Only)
Fillet Weld (Other Side)
Size of Fillet Weld Noted
1/4
1/4
1/4
D h f Example of Double BevelDepth of preparation or groove
Example of Double Bevel Groove weld
1/4 (5/16)
g
1/4 (5/16)
D th f t tiDepth of penetration
Plug or Slot Weld SymbolPlug or Slot Weld SymbolArrow Side
What does this symbol Represent?
5/16
Represent?5/16
5/16
Single-Bevel-Groove and Double Fillet Weld Symbol
5/16
Fillet Weld Symbol5/16
5/16
Single-Bevel-Groove and Double Fillet weld Symbols
Chain Intermittent Fillet WeldC e e e We dWeld both sides each end and 10 inches center to center in between
1/4 2 10 10 in1/4
1/4
2-10
2-10
10 in
Staggered Intermittent Fillet W ldWeld
Weld ends than 10 inch centers staggered each side
2-101/4
10 in
2-101/4
10 in
FGroove weld size
Finish Symbol Groove Angle included angle of countersink for plug weldsF
A
countersink for plug welds
Root opening; Depth of filling for
S(E) L-P
RDepth of bevel plug and slot welds.
Pitch(Center toLength of weld( ) Pitch(Center-to-center spacing) of weldsARROW SIDE
OTHER SIDE
FIELD
Length of weld
FIELD WELD
(N)Number of spot, seam, stud, plug, slot, or projection welds, p j
The End