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Stack Strakes

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Fellow engineers,

        I have a client who manufactures flare systems for the oil and gas 
industry.  A major component of these systems is the flare stack itself. 
These stacks vary from 40' to 80' tall with the top 6' to 10' varying from 
4" to 8" stainless steel pipe with a burner tip at the top.

        Occasionally, vortex shedding may be a concern; my client is 
willing to go to almost any length to avoid the use of traditional strakes.

        My question "What do you think of the idea of creating strakes by 
wrapping the top third of the stack with wire rope and securing the rope to 
 the stack with clips that are tack welded to the stack?"  The cost of wire 
 rope strakes would seem to be only a small fraction of the cost of 
traditional rolled plate strakes.


H. Daryl Richardson

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