Welding Symbols Presentation

7/29/2019 Welding Symbols Presentation

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Welding Symbols

Understanding Welding Symbols

Terms and Definitions


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Created By Rajesh


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Reference Line (Required element)

Reference Line

Always Horizontal


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Arrow

Arrow Line


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Arrow

Tail

Tail


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Arrow

Tail

Reference Line must always be horizontal,

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

weld area.

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.


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Arrow

Tail

Reference Line must always be horizontal,

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

weld area.

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.

Basic components of aWELDING SYMBOL

Tail omitted when reference not used

Arrow connects reference line to arrow side

member of joint or arrow side of joint


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A circle at the tangent of the arrow and the reference line

means welding to be all around.

All the way Around


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A flag at the tangent of the reference line and arrow

means Field Weld.

Field Weld Symbol


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ARROW SIDE

OTHER SIDE

Weld Symbol Terminology


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Break in arrow means arrow side

must be side that beveling or

other preparation required.


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Fillet Weld (Arrow Side Only)


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Fillet Weld (Other Side)


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1/4

1/4

Size of Fillet Weld Noted


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1/4

1/4

(5/16)

(5/16)

Depth of

preparation or

groove

Depth of penetration

Example of Double Bevel

Groove weld


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Plug or Slot Weld Symbol

Arrow Side

Wh t d thi b l


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5/16

5/16

What does this symbol

Represent?


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5/16

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Single-Bevel-Groove and Double

Fillet Weld Symbol


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Single-Bevel-Groove and Double

Fillet weld Symbols


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Chain Intermittent Fillet WeldWeld both sides each end and 10

inches center to center in between

1/4

1/4

2-10

2-10

10 in


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Staggered Intermittent Fillet

WeldWeld ends than 10 inch centers

staggered each side

10 in

10 in

2-10

2-101/4

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Fi i h S b l


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S(E) L-P

F

A

R

(N)

Depth of bevel

Groove weld size

Finish Symbol

Groove Angle included angle of

countersink for plug welds

Root opening; Depth of filling for

plug and slot welds.

Pitch(Center-to-

center spacing) ofwelds

Number of spot, seam, stud, plug,

slot, or projection welds

ARROW SIDE

OTHER SIDE

FIELD

WELD

Length of weld


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The End

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Welding Symbols Presentation