Issue 1 V1.08
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Welded Connections > Force on Tube/Pipe FP Butt Weld

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Full Penetration Weld Stress on Tube

Notation and Units

Metric and Imperial Units

The above welding stress equations may be used with both imperial and metric units. As with all mathematical calculations care must be taken to keep consistent units throughout. Examples of units which could be adopted have been provided below:

Notation

  • a = weld throat thickness, in or mm
  • D = tube/pipe outside diameter, in or mm
  • d = effective tube/pipe inside diameter , in or mm
  • P = total axial force, kip or kN
  • σ = stress in weld, psi or MPa