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Butt Weld Throat Area Equation and Calculation

Weld Design Menu

The following are equations to define the butt weld throat area of a butt weld that includes the full weld length as well as active loading bearing area.

Butt Weld Orientation

Weld Illustration

Throat Area of Butt Weld [mm2, in2]

Full Weld Length Active Load-bearing Length
Butt End Tube Weld

Circumferential Tube Weld

Angled Relative to applied load

Normal to Applied Load

Where:

A

= Area in2
= Weld angle [deg]
s = Plate or tube thickness [mm, in]
L = Length of weld [mm, in] 
= pi (3.14157)

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