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Axial Break-out, Residual and Remolded Resistance Used For Thermal Expansion Analysis

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judeotuks

Structural
Joined
Jan 14, 2013
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18
Location
GB
I have just calculated axial friction factor of a pipeline laid on a soft clay based on three parameters; breakout friction, residual friction and remolded friction...Residual friction gave me lowest value while breakout gave me the highest value (Ref OTC 19589 PSI during lateral Buckling and walking-SAFEBUCK JIP).

However, is it ok or too less conservative to use the BREAK-OUT AXIAL FRICTION FACTOR as my axial friction coefficient during thermal expansion analysis? And also, whats the differences between these three parameters?
 
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