Re: Cast iron pump nozzle with RF flange

Dear Chris

Proper torque value can be witnessed and insured the 1st time installation, but with the time insuring proper torque bolting value by Maintenance is questionable. Some time Maintenance crew work in the evening or during emergency situation to remove or install equipment. "to do some Code calculations to back up your bolting" as suggested cannot be guranteed all time. In addtion, what advantage or benefits to utilize RF CI flange instead of FF in this situation ?

Khaled Mahmoud
Jeddah Refinery

• Christopher Wright <chrisw@skypoint.com> wrote:

>
> On Jan 22, 2008, at 11:47 AM, M. Engineer wrote:
>
> > We had several failures for RF CI flanges in our
> > refineries during bolting and tightening, please
> don't
> > use RF cast iron flanges. On the other hand, we
> have
> > several pumps with CI flat face flanges, and they
> are OK
>
> It's OK to use cast iron flanges--people have been
> using them for
> years. Just don't over tighten them. Seems simple
> enough. It's a good
> idea to do some Code calculations to back up your
> bolting and
> maintenance practices.
>
> Christopher Wright P.E. |"They couldn't hit an
> elephant at
> chrisw@skypoint.com | this distance" (last words
> of Gen.
> .......................................| John
> Sedgwick, Spotsylvania
> 1864)
> http://www.skypoint.com/~chrisw/
>
>
>
>
Received on Wed Jan 23 07:50:00 2008