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RE: Specific Gravity of coke

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Per MIL-HDBK-1002/2A 

Coal, coke  		75 pcf
Coal & coke, piled 	23-32 pcf

Harold Sprague

> -----Original Message-----
> From:	Cummings, CM (Christopher) at MSXBEI(P)
> [SMTP:CMCummings(--nospam--at)]
> Sent:	Friday, October 13, 2000 8:50 AM
> To:	'seaint(--nospam--at)'
> Subject:	Specific Gravity of coke
> I am currently involved in a project to evaluate the condition of an
> existing delayed coking unit structure in a refinery.  The problem we are
> encountering right now is determining a reasonable value to use for the
> weight of the coke drums when they are full.  The client has given us a
> weight based on a specific gravity of 2.0 for the coke; however, we are
> having problems justifying the original design of the structure (vintage
> early 1960's) using weights calculated on that basis.  Has anyone used a
> lower value for the s.g. of coke in the design of one of these structures?
> I have heard the value of 1.53 discussed, but a disclaimer of "hearsay"
> was attached to it.
> Thanks,
> Chris Cummings, PE