Re: C.O.G OF PIPES

From: <Jagarlamudi.Suresh@ril.com>
Date: Tue Jun 01 2004 - 04:48:00 EDT

are you working on Caesar II or any other software? If you are working on Caesar II then you will get C.O.G of the system in different cases while checking of your error and warning report as well as you will get this information in output report also. In output report it is in miscellaneous data as given below

CAESAR II  C.G. REPORT          FILE:DB057A00._P
                                Total Wght     X cg      Y cg      Z cg
------------------------------------------------------------------------------
                                   (N. )      (mm.)     (mm.)     (mm.)
   Pipe                  :       616068.6   42072.5   49200.0  -30980.2
   Insulation            :            0.0       0.0       0.0       0.0
   Refractory            :            0.0       0.0       0.0       0.0
   Fluid                 :       966795.6   40285.5   49571.0  -30255.0
   Pipe+Insl+Refrty      :       616068.6   42072.5   49200.0  -30980.2
   Pipe+Fluid            :      1582862.6   40981.0   49426.6  -30537.3
   Pipe+Insl+Refrty+Fluid:      1582862.6   40981.0   49426.6  -30537.3

If you are not using Caesar II you can calculate it by manual calculations.
X =W1*x1+W2*x2+..../(W1+W2+...)
Y =W1*y1+W2*y2+..../(W1+W2+...)
X and Y are C.O.G point coordinates.

x1,x2,.. are x coordinates of C.G of each pipe segment.
y1,y2,.. are Y coordinates of C.G of each pipe segment.
W1,W2,... are weight of each segment.

The above is for 2D plane calculation like Same way we can calculate for 3D with addition of Z coordinate to the above. In the above calculation you must consider all straight pipes,elbows and reducers.
For straight pipe C.G is at centre of the pipe. For 90 and 45 degree elbows it is interms of Radius. For finding the C.O.G in 3D you must draw different views in different planes and calculate it by using above said method.

I think this information may help you.
From
suresh.J Received on Tue Jun 01 04:48:00 2004