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Welding Symbols. Understanding Welding Symbols Terms and Definitions. Created By Jeffrey Rodenbarger Drake-Williams Steel Omaha, Nebraska. Reference Line. Reference Line (Required element). Always Horizontal. Arrow Line. Reference Line (Required element). Arrow. Tail.

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welding symbols

Welding Symbols

Understanding Welding Symbols

Terms and Definitions

reference line
Reference Line

Reference Line (Required element)

Always Horizontal

arrow line
Arrow Line

Reference Line (Required element)

Arrow

slide5
Tail

Reference Line (Required element)

Arrow

Tail

slide6

Reference Line must always be horizontal,

Arrow 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.

slide7

Reference Line must always be horizontal,

Arrow points to the line or lines on drawing which clearly identify the proposed joint or weld area.

Basic components of aWELDING SYMBOL

Arrow connects reference line to arrow side member of joint or arrow side of joint

Reference Line (Required element)

Arrow

Tail omitted when reference not used

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.

all the way around
All the way Around

A circle at the tangent of the arrow and the reference line means welding to be all around.

field weld symbol
Field Weld Symbol

A flag at the tangent of the reference line and arrow means Field Weld.

weld symbol terminology
Weld Symbol Terminology

OTHER SIDE

ARROW SIDE

example of double bevel groove weld
Example of Double Bevel Groove weld

Depth of preparation or groove

1/4

(5/16)

1/4

(5/16)

Depth of penetration

chain intermittent fillet weld

Chain Intermittent Fillet Weld

Weld both sides each end and 10 inches center to center in between

1/4

2-10

10 in

1/4

2-10

staggered intermittent fillet weld

Staggered Intermittent Fillet Weld

1/4

2-10

Weld ends than 10 inch centers staggered each side

1/4

2-10

10 in

10 in

slide22

Finish Symbol

Groove Angle included angle of countersink for plug welds

Groove weld size

F

A

R

Root opening; Depth of filling for plug and slot welds.

Depth of bevel

S(E) L-P

Length of weld

Pitch(Center-to-center spacing) of welds

OTHER SIDE

ARROW SIDE

FIELD WELD

(N)

Number of spot, seam, stud, plug, slot, or projection welds