Re: Piping supports contact surface friction factor

Thanks for the sketch address,

Yes it is like the sketch in the address. But it has two legs - made of pipe- and it is pipe to pipe contcat without any shose. Only a pad will cover the bottom of big bore pipes on the supports.

The are two 30" pipes near the legs and between them there are five 1+1/2" and two 4" pipes. The average width of supports are 4 meters and the averge top of support elevation from the ground level is 7.5 meters.

We have decided to make the support of 16" pipes for legs and 10" pipes for resting part. One 10" pipe as bracing element also will be considered in each support.

Thanks,

Keivan

• In PipingDesign@yahoogroups.com, "Paul Bowers" <pbowers@p...> wrote:
  > Does this image (
  <a href="http://www.pipingdesign.com/drawings/piping_support.jpg">http://www.pipingdesign.com/drawings/piping_support.jpg</a> )
  > describe the situation?
  >
  > Paul
  >
  > ----- Original Message -----
  > From: "Dr.A.Seibi" <aseibi@s...>
  > To: <PipingDesign@yahoogroups.com>
  > Sent: Tuesday, November 11, 2003 6:27 AM
  > Subject: Re: [PipingDesign] Piping supports contact surface
  friction factor
  >
  >
  > > Dear Keivan,
  > >
  > > Can you send a sketch of what you are trying to do? Maybe I can
  help in
  > > this matter.
  > >
  > > Dr. A. Seibi
  > > ----- Original Message -----
  > > From: "k1_m_a" <mashayekh-k@i...>
  > > To: <PipingDesign@yahoogroups.com>
  > > Sent: Tuesday, November 11, 2003 10:58 AM
  > > Subject: Re: [PipingDesign] Piping supports contact surface
  friction
  > factor
  > >
  > >
  > > > Dear Sajit,
  > > >
  > > > The history of the job is that, considering the expences,
  > > > construction concerns and the number of supports we are obliged
  to
  > > > use simple pipe supprts made of pipes. And because of this
  Teflon
  > > > Sliders can not be used.
  > > >
  > > > And that friction factor of 0.3 has been considered based on
  > > > Petroleum Standards in my country. But now I am looking for some
  > > > other standards and reliable references to based on them lower
  > > > friction factor for pipe to pipe contact can be cosidered.
  > > >
  > > > That's all.
  > > >
  > > > Regards,
  > > >
  > > > Keivan
  > > >
  > > >
  > > >
  > > > --- In PipingDesign@yahoogroups.com, "Sajit Viswan"
  <sviswan@t...>
  > > > wrote:
  > > > > May I suggest,
  > > > >
  > > > > The person who raises the question should also say what
  answers on
  > > > the question that he has already found (Including previous
  postings
  > > > on this list), so that the person who answers does not have to
  start
  > > > from zero.
  > > > >
  > > > > For a start, have you considered supports with teflon slides?
  > > > >
  > > > > Sajit
  > > > >
  > > > > -----Original Message-----
  > > > > From: k1_m_a [mailto:mashayekh-k@i...]
  > > > > Sent: Monday, November 10, 2003 6:45 PM
  > > > > To: <a href="/group/PipingDesign/post?postID=dvoEjgoinVWYvGDcTql5u0RsFMQcHE7Zl9sGPdvLgPuT1vaXaPbL6p6AMh06Nn5vQPz_34zmLPJCm8LVNN3Esp3QbOs">PipingDesign@yahoogroups.com</a>
  > > > > Subject: [Man.Distr][PipingDesign] Piping supports contact
  surface
  > > > friction factor
  > > > >
  > > > >
  > > > > Dear members,
  > > > >
  > > > > Thank you in advance for your kind attention.
  > > > >
  > > > > In the Gas Treating Plant we are working on, we have faced
  this
  > > > problem that
  > > > > for Flare lines outside the battery limits, the piping
  supports
  > > > have become
  > > > > very huge.
  > > > > Piping load is big, elevation is high and the supports shall
  be of
  > > > pipes. But
  > > > > considering 0.3 friction factor for pipe to pipe, the
  horizontal
  > > > load will be
  > > > > so big that will tend to a huge supprt structure.
  > > > >
  > > > > Is there any reference standard or approved engineering
  practice to
  > > > stick to
  > > > > that to consider lower friction factor for pipe to pipe
  surface
  > > > contact?
  > > > >
  > > > > Best regards,
  > > > >
  > > > > Keivan Mashayekh