Need a book? Engineering books recommendations...

Return to index: [Subject] [Thread] [Date] [Author]

Re: Specific Gravity of coke

[Subject Prev][Subject Next][Thread Prev][Thread Next]
Chris Cummings, PE

Table 7-4 of the AISC LRFD manual (2nd Edition)lists coke as 75 pcf, with
a specific gravity ranging from 1.0 to 1.4

However, this table also list Coke, Piled, as 23-32 pcf.  This is probably
the value that was used for the original design.  ( bulk coke has lots of
void spaces)

Edwin R. Schmeckpeper, P.E., Ph.D.
Department of Civil Engineering                   Phone  : (208) 885-6702 
University of Idaho                               FAX    : (208) 885-6608
Moscow, Idaho 83844-1022                          E-Mail : eds(--nospam--at)

On Fri, 13 Oct 2000, Cummings, CM (Christopher) at MSXBEI(P) wrote:

> 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.