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Bend Flexibility Factor with External Pressure

Bend Flexibility Factor with External Pressure

Bend Flexibility Factor with External Pressure

Hi all,

ASME B31.4 gives a correction factor for the flexibility factor for bends when those are subject to an internal pressure (even if it doesn't specifically say "internal" pressure I deduce it from the fact that ASME B31.4 is mainly a piping code). Internal pressure decreases the flexibility of the bend or in other words increase the stiffness. My question is: would it work the other way round when the bend is subject to a significant external overpressure felt for example by an empty pipe in deep water?

Many thanks


RE: Bend Flexibility Factor with External Pressure

Yes.  External pressure will collapse a pipe, if it rises above the theoretical collapse pressure. Collapse pressure is highly dependent on the initial ovalization of the pipe.

"The problem isn't finding the solution, its trying to get to the real question." BigInch

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