Butt Weld Throat Area Equation and Calculation
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 |
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Butt End Tube Weld |
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Circumferential Tube Weld | ![]() |
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Angled Relative to applied load |
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Normal to Applied Load | ![]() |
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Butt Weld Orientation |
Weld Illustration |
Throat Area of Butt Weld [mm2, in2] |
Active Load-bearing Length |
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Butt End Tube Weld |
|
![]() |
Circumferential Tube Weld | ![]() |
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Angled Relative to applied load |
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Normal to Applied Load | ![]() |
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Where: | |
A |
= Area in2 |
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= Weld angle [deg] |
s | = Plate or tube thickness [mm, in] |
L | = Length of weld [mm, in] |
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= pi (3.14157) |