pipingdesign: RE: Rack Piping

From: <Geoff>
Date: Thu May 16 2002 - 18:03:00 EDT

I rememjber one rule that has always been required. "change of direction change of elevation". This prevents sterilisation of areas of the rack that occurs when you flat turn.

Another was bring control valve stations and their bypasses back down to grade or the maintenance guys will kill you.
--- Ashok Dani <ashokdani@tatachem.tata.com> wrote:

<tt>
      Dear Ravi, 
            Piperack needed
to support parallel piping runs. it is must established for all petrochemicals and other process units to arrange horizontal pipe runs neatly and economically, grouping them in logical sequence for easy takeoff to local equipment and other piping units. Racks are used only for multiple, parallel pipe runs where a common support for many pipes is essential. they also support other such as cable trays, instrument lines, electrical cables etc. Generally all large dia. pipes are run on a pipe rack. Water lines, large sewer lines, cooling water pipes are generally laid underground. By grouping pipelines in racks, it is possible to support multiple runs on similar cross members. 
      Tips. 
      1.      Place process
lines on both sides of utility lines. if process lines go to equipment on right, they should be on right
      side 

of the rack. 
      2.      Establish all
piping loops for expansion over the top of the pipe rack. never extend loops out horizontally from pipe
      rack edges. 
      3.      Allocated the
outer edges of pipe racks, to heavy, large dia pipe lines. Allocate center of pipe racks to light, small
      dia pipe 
lines. 
      4.      Allow atleast
25-30% space for expansion / future  piping needs. 
      5.      Low temp.
non-insulated lines should lie directly on the cross-members. 
      6.      Attempt to
limit the diameter of piping on a rack to 24" place larger lines underground if possible. 
      7.      Control valves,
junction box etc. should be located they should easily operated and serviced when needed. 
      Regards 
      Parag 
 
> -----Original Message----- 
> From:      Arora, Ravi
[SMTP:rarora@bechtel.com] 
> Sent:      Thursday, May 16, 2002 4:51 PM 
> To:      'PipingDesign@yahoogroups.com' 
> Subject:      RE: [PipingDesign] Rack Piping 
> 
> what a piping designer should consider while routing a line on a rack
and 
> if 
> possible why???? 
> 
> Ravi 
> 
> -----Original Message----- 
> From: Ashok Dani [mailto:ashokdani@tatachem.tata.com] 
> Sent: Thursday, 16 May 2002 4:13 PM 
> To: 'PipingDesign@yahoogroups.com' 
> Subject: RE: [PipingDesign] Rack Piping 
> 
> 
> Hey Man, 
> What type of guidelines you are looking for? 
> Please clarify..... 
> Parag 
> 
> > -----Original Message----- 
> > From:      Arora, Ravi
[SMTP:rarora@bechtel.com] 
> > Sent:      Thursday, May 16, 2002 2:49
PM 
> > To:      PipingDesign@yahoogroups.com 
> > Subject:      [PipingDesign] Rack Piping 
> > 
> > Can anybody give me some guidelines for Rack Piping???? 
> > 
> > Thanks 
> > Ravi 
> > 
> > 
> > _____________________________________________________ 
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</tt>

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