Re: space constraint.

From: <Richard>
Date: Thu Aug 18 2005 - 10:12:00 EDT

Another opinion...

This method of line spacing is undesirable. 25mm between the OD of lines in the rack will generally result in the lines using each other as guides. Thermal expansion isn't limited to the axis of the rack but rather lines will typically deflect a few inches (50+ mm) side to side. With sub-standard spacing this may cause lines to touch each other and in extreme cases actually apply loads from one pipe to another. You might consider alternate routing (cantilever outside the piperack columns?).

• Original Message -----
  From: abdul aziz vayani
  To: <a href="/group/PipingDesign/post?postID=5xuqmV-C1sHWsrwFLrSPVQGw-986FjjEDzjTjAbfwOZE5BBGpyvql33R8eySKpouIfV_o6BaEl1-RtIb_tRaO7h1ejUwXw">PipingDesign@yahoogroups.com</a>
  Sent: Tuesday, August 16, 2005 1:51 AM
  Subject: Re: [PipingDesign] space constraint.
  

Dear Pervez

If there is no any valve or flange fitting at the rack then this space (25mm
spacing between larger pipe OD and smaller pipie OD)is enough, but make sure that these lines are not insulated.

Guides are generally provided at alternate rack supports to maintain straight
centerline of pipe. For available spacing you cannot provide the angle type guides that are generally used for 6" & 8" . However plate type guides may be used at scattered location.

Regards

1. Aziz Vayani

Parvez.Mulla@ril.com wrote:

Dear All,

Due to space constraint in exisiting pipe rack i am not able to place pipes
as per std spacing (i.e centre to centre - larger pipe flange OD +25mm+
smaller pipe OD). if i maintain 25mm spacing between larger pipe OD and
smaller pipie OD my problem will be sort out. But in this case i would be
difficult for me to place axial guide. Can i eliminate the guide.

Line size (8"-2nos, 6"-2nos,)
Temp (35-45 degree centigrade)

Your suggestion required.

Regards,
Parvez.

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[Non-text portions of this message have been removed] Received on Thu Aug 18 10:12:00 2005